The galactic distances used to measure the acceleration of the universe are determined by observations of exploding white dwarfs (supernovae). Correct answer: letter C.
Because the brightness of a supernova is known very precisely. By measuring the brightness of a supernova, astronomers can calculate its distance from Earth. This allows them to measure the distance of far away galaxies and compare them over time to determine the acceleration of the universe.
What are white dwarfs?
White dwarfs are the dense, glowing remains of stars that have exhausted their nuclear fuel. These stars range in mass from about 0.6 to 1.4 times the mass of the Sun and are about the size of Earth. White dwarfs are some of the oldest stars in the universe, with lifespans of billions of years.
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Given the magnitudes of vectors u and v and the angle θ between them, find sum of . Give the magnitude to the nearest tenth when necessary and give the direction by specifying the angle that the resultant makes with u to the nearest degree. ∣ u∣ = 5, ∣ v∣ = 11, θ = 40°
The sum of magnitude of u + v is 15.99.
Given that, magnitude of u is 5
Magnitude of v is 11
The angle between them is 40°
Let us represent u and v in vector form,
u = 5 ( cos 40° i + sin 40° j ) = 3.83 i + 3.21 j
v = 11 ( cos 40° i + sin 40° j ) = 8.42 i + 7.07 j
The sum of two vectors is given by u + v = 3.83 i + 3.21 j + 8.42 i + 7.07 j = 12.25 i + 10.28 j
Magnitude of u + v = √(12.25²+10.28²) = √( 150.063 + 105.678) = 15.99
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Hunting a black hole. Observations of the light from a certain star indicate that it part of a binary (two-star) system. This visible star has orbital speed v = 270 km/s, orbital period T = 1.70 days, and approximate mass m1==6Ms, where Ms, is the Sun's mass, 1.99×1030 kg Assume that the visible star and its companion star, which is dark and unseen, are both in circular orbits (Fig. 13-47). What integer multiple of Ms, given the approximate mass m2 of the dark star?
The equation has one real solution: α=9.3, which implies m₂ /M s≈9.
What integer multiple of Ms, given the approximate mass m2 of the dark star?The two stars are in circular orbits, not about each other, but about the two-star system's center of mass (denoted as O ), which lies along the line connecting the centers of the two stars. The gravitational force between the stars provides the centripetal force necessary to keep their orbits circular. Thus, for the visible, Newton's second law gives
F=r2Gm₁m₂=r₁m₁v₂
where r is the distance between the centers of the stars. To find the relation between r and r₁, we locate the center of mass relative to m1. Using Equation 9−1, we obtain
r₁=m₁+m₂m₁(0)+m₂r=m₁+m₂m₂r ⇒r=m₂m₁+m₂r₁
On the other hand, since the orbital speed of m₁ is v=2πr₁/T, then r₁=vT/2π and the expression for r can be rewritten as
r=m₂m₁ / m2 × vT/2π
Substituting r and r₁ into the force equation, we obtain
F=(m1+m2)2v2T24π2Gm1m23=T2πm1v
or
6.90×1030kg =3.467Ms
where Ms=1.99×10³⁰kg is the mass of the sun. With m₁=6Ms, we write m₂=αMs and solve the following cubic equation for α:
α³/(6+α)²−3.467=0
What is Black hole?In space, a black hole is a region where gravity is so strong that even light cannot escape. Because the substance is compressed into such a small area, the gravity is extremely intense. When a star is dying, this may take place. People cannot perceive black holes because no light can escape from them. They are undetectable.
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if the spring is pulled until it stretches 3.00 cm and the pack remains at rest, what is the force of friction exerted on the backpack by the table?
4.5 N is the force of friction exerted on the backpack by the table.
given:
Spring constant speing, k = 150 N/m
Extension spring, x = 3.00 cm = 0.03 m
Force=kx
Force=150×0.03
Force=4.5 N
Friction force is the resistance that forms at the point of contact between two or more objects when they move over one another. The direction of the friction force is always parallel to the motion of the object.
The surface's roughness and external pressures have an impact on how much friction occurs. The rougher the surface, the stronger the force of friction acts on it. The same is true of external elements.
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The wire in (Figure 1) carries current I2, which is 20 times the current I1 of the loop; the direction of the current in the wire is shown. The magnetic field in the center of the loop is zero. The radius R of the loop is 1.2 cm.What is the distance d from the wire to the center of the loop?Express your answer with the appropriate units.
The distance d from the wire to the center of the loop is 7.64 cm.
What is loop?
A loop is a set of instructions that are repeatedly carried out until a specific condition is met in computer programming. Typically, a specific action is taken, such as getting and changing a piece of data, and then a condition is checked, such as determining whether a counter had also reached a predetermined value. If not, the following instruction in the sequence directs the computer to go back to the first instruction inside the sequence as well as repeat it. The following instruction "falls through" to a following sequential instruction as well as branches outside the loop if the condition has been met. A loop is a fundamental concept in programming that is frequently applied when creating programmes.
The distance d from the wire to the center of the loop is a result of the magnetic field created by the current in the wire. The magnetic field created by a current is proportional to the current and inversely proportional to the distance from the wire. Therefore, we can use the equation B=μI/2πd, where μ is the permeability of free space, B is the magnetic field, I is the current, and d is the distance from the wire to the center of the loop. We can rearrange this equation to solve for d: d= μI/2πB.
Plugging in the given values, we get d= (4π x 10^-7)(20I1)/2π(0) = 7.64 cm. Therefore, the distance d from the wire to the center of the loop is 7.64 cm.
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What is the rotational kinetic energy of the earth? Assume theearth is a uniform sphere. Data for the Earth can be found inthe back cover of the book.
The only data I can find is:
Mass of Earth: 5.98*10^24 kg
Mean radius: 6.37*10^6 m
I know that Krot = .5 I(ω^2)
I'm guessing that I = mass of earth * mean radius^2
since those are average values.
ω = 2π rad/day ????
The rotational kinetic energy of the earth is given by K = 1/2Iω²
I = rotational inertia of earth = 2MR²/5
where
M = mass of earth = 5.972 1× 0²⁴ kg
R = radius of earth = 6.4 × 10⁶ m.
ω = angular speed of earth = 2π/T
T = period of earth = 24 hours = 24 × 60 × 60 = 86400 s = 8.64 × 10⁴ s
So, K = 1/2Iω²
K = 1/2 × 2MR²/5 × (2π/T)²
K = 4π²MR²/5T²
Substituting the values of the variables into the equation, we can find the energy
K = 4π²MR²/5T²
K = 4π² × 5.972 × 10²⁴ kg × (6.4 × 10⁶ m)²/[5(8.64 × 10⁴ s)²]
K = 4π² × 5.972 × 10²⁴ kg × 40.96 × 10¹² m²/[5(74.6496 × 10⁸ s)²]
K = 4π² × 244.61312 × 10³⁶ kgm²/373.248 × 10⁸ s²
K = 9656.93890286 × 10³⁶ kgm²/373.248 × 10⁸ s²
K = 25.87 × 10²⁸ kgm²/s²
K = 2.587 × 10²⁹ J
Therefore, the rotational kinetic energy of the earth is 2.587 × 10²⁹ J
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How much would a person weigh on Mars if the person weighs 75 kg on Earth?.
So permit's don't forget the W dash as the weight of the man or woman at the surface of Mars. So with a purpose to be the mass of this astronaut, with a view to continue to be steady everywhere. times the acceleration because of gravity at the floor of Mars, 3.8. So here, whilst we multiply 75 through 3. eight, that's going to get us to 85 Newton's.
overline{a} = frac{v - v_0}{t} = frac{Delta v}{Delta t}
overline{a} = common acceleration
v = very last pace
v_0 = beginning pace
t = elapsed time
Acceleration is the rate at which pace modifications with time, in phrases of each velocity and route. A point or an object moving in a direct line is multiplied if it quickens or slows down.
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a blue car is at rest at a stoplight. the moment the stoplight turns green, a red car passes it moving with a constant speed of 19.1 m/s. the blue car accelerates uniformly at a rate of 5.35 m/s/s. how much time elapses before the blue car catches up with the red car?
Both automobiles move forward as soon as the light turns green. Required 8.76 s Automobile speed. The blue car must travel 18.4 m/s faster than the red car in order to overtake it.
A car that is continuously accelerating as the light turns green?When the light turns green, an automobile accelerates continuously at a rate of 2 m/s2. At the same moment, a truck overtakes and passes the car while maintaining a steady speed of 10 m/s.
When an automobile turns at a steady speed, does it accelerate?Yes, since it is shifting course. Any time there is a change in speed, direction, or both, acceleration takes place. the proportion of a line's vertical change (rise) to its horizontal change (run).
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What do you predict would happen if you brought a negatively charged balloon next to an uncharged piece of paper?.
The balloon's negative charge draws the paper to it.
How does this attraction between balloon and paper happen?A portion of the paper near the balloon becomes positive when you place the balloon close to a small piece of paper because the negative balloon repels the electrons in the paper. The paper moves in the direction of the balloon because positive and negative forces are attracted to one another. The paper is drawn to the balloon's negative charge.
This phenomena is called charging of body by induction because the charges are being induced in this process.
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What does net force equal?.
The net force is the total of all the forces acting on an object, according to its definition. Mass can be accelerated by net force. Whether a body is at rest or in motion, another force is at work on it.
According to the formula below, the amount of net force acting on an object is equal to the object's mass times its acceleration. An object is not accelerating and is said to be in an equilibrium state if there is zero net force acting on it. The net force, also known as the total force, is the vector sum of all the forces acting on an object. This total force takes into account the fact that a force is a vector and that two forces with equal magnitudes acting in opposing directions will cancel one another out. The net force equals mass times acceleration, and the acceleration moves in the same direction as the net force. The net force and the acceleration are directly proportional.
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Consumer surplus will _____ when a monopolist goes from single-price monopoly to perfect price discrimination. Remain the same increase decrease initially increase and then return to its original level.
Under perfect price discrimination, buyers enjoy no consumer surplus at all. Instead, total surplus consists entirely of producer surplus for the monopoly.
The enterprise is allocatively green producing where the price is same to the marginal cost with the aid of proscribing output and raising rate, the unmarried fee monopolist captures a portion of the consumer surplus. When you consider that output is restrained, a portion of each the purchaser and manufacturer surplus is lost.
Price discrimination, takes place whilst a commercial enterprise fees the most feasible fee for each unit consumed. due to the fact prices range amongst devices, the firm captures all available consumer surplus for itself or the monetary surplus.
Price discrimination happens while a monopolist fees the equal consumer exceptional expenses for the distinctive gadgets of a commodity, despite the fact that these units are in truth homogeneous. this type of situation is defined as flawlessly discriminating monopoly.
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you are at camp over the summer and there is a wooden raft that is floating in a lake. you and enough of your friends hop on the raft to completely submerge it. what happens to the buoyant force on the raft?
it increases
The buoyant force on the raft increases as a result of your weights, which completely submerges the wooden raft floating in the lake.
The Buoyant force describes the relative tendency of objects to float or to rise when submerged in a fluid, for example, a lake. It can also refer to the power of a fluid to exert an upward force on a body placed in it.
Therefore, the buoyancy or buoyant force of the wooden raft increases when you and your friends exert enough force on it, thereby completely submerging it in the lake at that moment.
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a force <10, 0, 0> n acts for 0.4 seconds on an object of mass 1.2 kg whose initial velocity was <0, 20, 0> m/s. what is the new velocity?
The new velocity is < 2 , 15 , 0 >.
What is velocity?
The rate at which an object's position changes in relation to a reference frame and time is what is meant by velocity. Although it may sound complicated, velocity is simply the act of moving quickly in one direction. Since it is a vector quantity, the definition of velocity requires both magnitude (speed) as well as direction. Its SI equivalent is the metre per second (ms-1). A body is said to be accelerating if the magnitude or direction of its velocity changes.
Impulse, P = F * t
= < 10, 0, 0 >*0.3
= < 3 , 0 , 0 >
So, change in velocity, v f - v i = P / m
So, v f - < 0 , 15 , 0 > = < 3, 0 , 0 >/1.5 = < 2 , 0 , 0 >
So, v f = < 2 , 15 , 0 >
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What are the 5 elements of realistic fiction?.
The five elements of sensible fiction: Fiction tales have a tendency to take region in the present or recent beyond.
Characters are involved in events that might manifest. Characters stay in places that would be or are actual.
The characters seem like real people with real troubles solved in a realistic manner. practical fiction creates imaginary characters and conditions that depict our international society.
To define four important tale factors: person, putting, plot, and topic. Literary elements are the foundational constructing blocks of all testimonies. students will discover ways to perceive six simple elements (placing, point of view, plot, man or woman, conflict, subject matter), and assess and examine whether a creator has used them.
A literary element refers to additives of a literary painting (individual, putting, plot, topic, body, exposition, finishing/denouement, motif, titling, narrative factor of view). these are technical phrases for the “what” of a work. Literary elements consist of plot, battle, character, putting, a factor of view, and topic. they are essential due to the fact they provide a framework for the author to tell their tale. They supply the reader with a manner to comply with the story and apprehend what's going on.
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A child exerts a tangential 58.5 N force on the rim of a disk-shaped merry-go-round with a radius of 2.99 m.
If the merry-go-round starts at rest and acquires an angular speed of 0.1250 rev/s in 5.00 s, what is its mass?
A child exerts a tangential 58.5 N force on the rim of a disk-shaped merry-go-round with a radius of 2.99 m. mass of the rim is 1565 kg.
what is tangential force?Tangential force may be defined as the force which acts on a moving body in the direction of the tangent to the curved path of the body. If the velocity of the object is positive, then the acceleration will be negative. Σ F = m a the equation shows how an unbalanced force must be acting to cause negative acceleration or deceleration.
torque = force×perpendicular distance
torque=moment of inertia×angular acc
{mr²/2 }× {0.1250÷5}=2.99×58.5
on solving this eqn we get mass as 1565kg
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microwaves have wavelengths between group of answer choices 1 micron to 100 microns. 1 meter to 1000 meters. 1 millimeter to 1 meter. 1 micrometer to 1 millimeter.
Microwaves have a wavelength between 1millimeter to 1 meter
What are microwaves?Microwave is a form of electromagnetic radiation with wavelengths ranging from about one millimeter to one meter. Microwaves have the longest wavelength among the electromagnetic wave. Since velocity of electromagnetic wave is 3×10⁸ and it's given as frequency×wavelength.
This shows that the higher the wavelength , the lower the frequency of an electromagnetic wave and vice versa.
Therefore microwaves have very low frequency compared to other wave in electromagnetic wave like x-ray and gamma ray.
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What is the formula for preventing a collision?.
The formula for preventing a collision is involved recognize the hazard, Understanding the defense, and at last Act correctly, in time.
The formula for preventing a collision is called RUA, where R stands for Recognize the hazard, Constantly check the street ahead of you, and check your mirrors. Think almost what may happen as distant in progress as possible. Never assume that an unsafe condition will have passed before you reach it. U stands for understanding the defense, There are particular ways to handle most hazardous situations on the street. When you anticipate a danger, you're able to review the circumstance in your mind and visualize your defense so that when the time comes, you are able to act rapidly sufficient to avoid an accident. The arrangement is key and the last A stands for Act correctly, Once you see the risk and choose a defense, act promptly. Never assume that the condition will clear up. The sooner you act the more time you may avoid an accident.
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which of the following equations shows an incorrect relationship between pressures given in terms of different units?
Different units of pressure is: Pascal, dyne/cm², pounds per square inch.
What is pressure?The physical force applied to an object is referred to as pressure. Per unit area, a perpendicular force is delivered to the surface of the objects. F/A is the fundamental formula for pressure (Force per unit area). Pascals are a unit of pressure (Pa). Absolute, atmospheric, differential, and gauge pressures are different types of pressure.
Hence, Pressure = Force/area.
Atmospheric pressure is measured in atm, bar, millimeters of mercury or inches of mercury (used to measure blood pressure), torr, MSW, and FSW, as well as centimeters of water.
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A log weighing 890 lb is lifted by a pair of tongs as shown. Determine the forces exerted at Eand Fon tong DEF. (Round the final answers to two decimal places.) 1.5 in. 1.5 in. 3 in. 3 in. OON A B 2.5 in. 3.5 in. 12 in. - 12 in. Ib→ The force exerted on Eis The force exerted on Fis 3 9.2°.
A log weighing 890 lb is lifted by a pair of tongs as shown the forces exerted at E and F on tong DEF are 703.695 lb.
P= w= 890 lbM= fg = 0890 - FAC (5/ 7.81 ) - FBC ( (5/ 7.81) = 0 Mfg = 0 FAC = FBD = 695.112 lbfg= gy = 890/2 = 445 lbEx- Fx - fbd (6/7.81) = 0Ey = 0As per the solution the ∅ = 39.23 °And force = 703.695 lb.E= 10.79 lb.Ey = 0Fx= 545.125 lb.F = 703.695 lb. ∅ = 39.23 °Read more about log :
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This vehicle control symbol is used to determine ___________________. *
a. low gas levels
b. windshield wipers
c. low oil pressure
d. anti-lock brakes
This vehicle control symbol is used to determine low oil pressure.
A complete vehicle control system involves one ECU, which controls all aspects of the vehicle.
The advantages of central control are predominant into main areas, i.e. inputs and outputs. On the input side consider all the inputs required to operate each of the following three systems.
• Ignition system
• Fuel system
• Transmission system.
One central control system can potentially decrease the complexity of the wiring while increasing the possibilities for control. If each system is operating independently it is possible that each may not react to some extent in the best way with respect to the others.
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Is Ophelia a static or dynamic character?.
Ophelia is a dynamic character.
In Shakespeare's Hamlet, for example, the individual of Hamlet is dynamic due to the fact his attitudes and movements at the top of the play stand in direct assessment to those at the play's beginning; inside the same paintings, Polonius is static due to the fact his person is constant and does now not exchange.
Of all of the pivotal characters in Hamlet, Ophelia is the most static and one-dimensional. She has the capability to grow to be a sad heroine to conquer the adversities inflicted upon her, however, she as a substitute crumbles into madness, becoming merely tragic.
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What happens to force between two objects if distance and mass is halved?.
The force between two objects will remain same, if distance and mass is halved.
According to the law of gravitation, the force of attraction and repulsion between two objects is directly proportional to the product of their masses and inversely proportional to the square of their distance between them.
And is given as:
F = k [tex]\frac{Mm}{r^{2} }[/tex]
Given,
Mass of the first object = M
And mass of the second object = m
The distance between the objects = r
If distance and masses of both the objects gets halved then force between the objects will be:
F = k [tex]\frac{\frac{M}{2} \frac{m}{2} }{(r/2)^{2} }[/tex]
= kMm/[tex]r^{2}[/tex]
Hence, the force between the two objects will remain same.
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In a football game, two players tackle each other so hard that they both fly in opposite directions after they hit each other. What law of motion is this an example of?.
This is an example of Newton's third law of motion
What is Newton's third law of motion ?There is an equal and opposite reaction to every action, according to Newton's third law of motion. These forces of action and reaction work on two different bodies. As an illustration, when we walk, we push the ground backward. In turn, the ground pushes us forward (reaction), which facilitates our movement on the surface.
A player's leg responds to this force by exerting an equal and opposite force that can stop the ball from moving. We refer to this as the reaction. Any force that is greater than the action-reaction pair will cause the ball to move further. As a result, the soccer game makes use of Newton's third law of motion.
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in the lab, how do you get the temperature of the metal to be close to 100.0oc? group of answer choices
We can get the temperature of the metal to be close to 100 degrees using calorimetry which is used to measure amount of heat to or from substance.
What is calorimetry?Calorimetry is used to measure the amounts of heat transferred to or from a substance. In this, heat is exchanged with a calibrated object that is calorimeter. The temperature change is measured by the calorimeter which is used to derive the amount of heat transferred by the process under study.
To find the temperature change of a metal:
Subtracting final and initial temperature to get the change in temperature (ΔT). Then, multiplying the change in temperature with the mass of the sample. Now, dividing the heat supplied/energy with the product. And the the formula is given as, C = Q / (ΔT ⨉ m).To know more about calorimetry, refer
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How fast do you fall after 1 second?.
Answer:
9.81 m/s ( or 32.2 ft/s )
Explanation:
At ONE second your velocity
v = at = 9.81 * 1 = 9.81 m/s
How does visible light differ from ultraviolet and infrared on the electromagnetic spectrum.
Because infrared radiation has longer waves than red light, it has a lower frequency and contains less energy. While ultraviolet radiation has shorter wavelengths than blue or violet light, it moves up and down faster and delivers more energy per photon than visible light. In other words, they are differ in wavelength (λ).
Longer wavelengths than visible light allow infrared waves to penetrate through thick areas of gas and dust in space with less scattering and absorption. Thus, infrared radiation can reveal objects in the cosmos that optical telescopes cannot view in visible light.
On the otherside, the wavelength (λ) of UV light is shorter than the wavelength of visible light. Purple and violet light have shorter wavelengths than other colors of light, and ultraviolet light has even shorter wavelengths than violet; thus, ultraviolet light is "purpler-than-purple" or "beyond violet."
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the unit of current, the ampere, is defined in terms of the force between currents. two 1.0-meter-long sections of very long wires a distance 2.0 m apart each carry a current of 1.0 a. part a what is the force between them? (if the force between two actual wires has this value, the current is defined to be exactly 1 a.) express your answer with the appropriate units. f
The force between the wires is 1*10⁻⁷T.
What is ampere?
The rate at which electrons flow or current flows across an electrical conductor is measured in amperes. An electrical charge of one coulomb (6.24 x 1018 charge carriers) per second that passes a particular place is represented by one ampere of current.
What is force?
A mass-containing object's change in velocity is referred to as a force when a push or pull is applied to it. A body can change its state of rest or motion when an external force acts on it. It is directed and has a magnitude.
The concepts required to solve the given problem is magnetic field due to a current carrying wire and force on a current carrying wire due to magnetic field.
Initially, determine the magnetic field at one wire due to other wire by using expression magnetic field due to a current carrying wire. Then, determine the force on the wire by using magnetic field, length of the wire and current in the wire.
The current carrying wire creates a magnetic field around the wire and the direction of magnetic field around the wire is known by using right hand rule.
The magnitude of magnetic field B due to a current carrying wire at distance r from the wire is given by following expression.
B=Here, I is the current, and μ₀ I/2πr
Here, I is the current, and
μ₀is the permeability.
The magnetic force F on a current carrying wire is given by following expression.
F= BIL
Here, L is the length of the wire.
Step: 1
The magnitude of magnetic field B due to a current carrying wire at distance r from the wire is given by following expression.
B= μ₀ I/2πr
Substitute 1.0 A for I, 2.0 for r, and
4πr*10⁻⁷ H/m
for μ₀ in the above equation.
B= (4πr*10⁻⁷ H/m) (1.0A)/2πr(2.0m)
=1*10⁻⁷T
Explanation:
The direction of magnetic force on each wire is depends on the direction of current in the each wire. If the current direction of current is same in both wires then force is attractive and repulsive if the direction of current is opposite in both wires.
Therefore, force between the wires is 1*10⁻⁷T.
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What is the relationship between the law of supply and the quantity supplied?.
According to the law of supply, a cornerstone of economic theory, an increase in price causes a rise in the amount provided while other variables remain constant.
In other words, there is a direct correlation between price and quantity, with quantities responding to changes in price in the same manner. This indicates that manufacturers are prepared to increase output as a strategy to boost earnings by putting more of a product on the market for sale at higher prices.
The rising slope of the supply curve is caused by the law of supply, which is an association between the amount provided and the price that is positive.
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t what is the difference between a basic speed i law, a minimum speed litnit, and an advisory speed limit?
For the best driving conditions, a speed restriction is established, and motorists are not permitted to go beyond it. A minimum speed restriction informs drivers that they are not allowed to travel any slower than the indicated speed.
What is the speed in physics?The pace at which an object's location changes in any direction. Speed is defined as the distance traveled divided by the travel time. Speed is a scalar number since it just has a direction and no magnitude.
What are the many sorts of speed?It refers to how quickly an object is traveling. Speed is defined as distance traveled divided by time. m/sec is the speed measurement unit. Speed is a scalar number that represents the size of the velocity vector.
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a fisherman notices that wave crests pass the bow of his anchored boat every 3.10 s. he measures the distance between two crests to be 8.30 m. how fast are the waves traveling?
A fisherman notices that wave crests pass the bow of his anchored boat every 3.10 s. He measures the distance between the two crests to be 8.30 m. Therefore, the waves travel at the speed of 2.677 m/s.
How is the speed of waves calculated?
Given:
λ = Distance between two crests (Wavelength) = 8.30 m
T = Time = 3.10 s
Frequency = [tex]\frac{1}{T}[/tex]
V = Speed of the waves =?
Formula: V = Wavelength × Frequency
= λ × [tex]\frac{1}{T}[/tex]
= 8.30 ×[tex]\frac{1}{3.10}[/tex]
= 2.677 m/s
What is the speed of waves?The amount of distance a wave covers in a certain amount of time is known as wave speed. It covers the number of meters in a second. Wave speed is related to both wavelength and wave frequency.
What is the crest in a wave?
The crest is the highest point on the wave. The trough is the area that is the lowest. The wavelength is the space between two successive crests (or troughs).
The two waves travel at the speed of 2.677 m/s.
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A fisherman noticed that every 3.10 seconds a wave crest passed the bow of a moored boat. He measured the distance between his two peaks to be 8.30 m, so the wave travels at a speed of 2.677 m/s.
Given:
λ = Distance between two crests (Wavelength) = 8.30 m
T = Time = 3.10 s
Frequency = 1/T
Formula:
V = Wavelength × Frequency
= 8.30 × 1/3.10
= 2.677 m/s
SPEED OF WAVES:
The distance traveled by a wave in a given time is called wave velocity. Covers meters per second. Wave velocity depends on both wavelength and wave frequency.
WAVE CREST:
The crest is the highest point of the wave. The trough is the lowest area. Wavelength is the distance between two consecutive peaks (or valleys).
Therefore, the wave travels at a speed of 2.677 m/s.
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q8. a car with a mass of 1500kg is being towed at a steady speed by a rope held at 20degrees angle from the horizontal. a friction force of 320n opposes the car's motion. what is the tension in the rope?
The tension in the rope is 340 N
The x component of the tension triangle is equal to the friction force, 320 N, BUT the tension is not equal to this.
Use Cos 20 degrees = a/H
Where a is 320 N and H will be the tension
If something is at an angle, don't assume it is equivalent to the thing on the other side because of the angle
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