Answer:
the answer i
Explanation:
A 75 kg man and a 100. Kg woman are playing tug of war on a frictionless surface. The man accelerates toward the woman at 2.0 m/s2.
Complete Question
A 75 kg man and a 100. Kg woman are playing tug of war on a frictionless surface. The man accelerates toward the woman at 2.0 m/s2.How much force does she use to pull on the rope
Answer:
The value is [tex]F = 150 \ N[/tex]
Explanation:
From the question we are told that
The mass of the man is [tex]m_m = 75 \ kg[/tex]
The mass of the woman is [tex]m_f = 100 \ kg[/tex]
The acceleration of the man is [tex]a_m = 2.0 \ m/s ^2[/tex]
Generally the force which she used to pull the rope is mathematically represented as
[tex]F = m * a[/tex]
=> [tex]F = 75 * 2[/tex]
=> [tex]F = 150 \ N[/tex]
If the magnitude of a vector is√8 .If it's x-component is 2 ,then it's y- component is
Answer:
The answer is below
Explanation:
A vector quantity is a quantity that has both magnitude and direction. The magnitude of a vector is the length of that vector.
The magnitude of a vector a with a x component of x and y component of y is given by the formula:
[tex]|a|=\sqrt{x^2+y^2}[/tex]
Given that the vector has a magnitude of √8, the x component is 2 and the y component = y. Hence:
[tex]\sqrt{8}=\sqrt{2^2+y^2}\\\\squaring\ both\ sides:\\\\8=4 + y^2\\\\y^2=8-4\\\\y^2=4\\\\square\ root\ of\ both\ sides:\\\\y=\sqrt{4} \\\\y=\pm 2\\\\y=+2\ or\ y=-2[/tex]
What is the ideal banking angle (in degrees) for a gentle turn of 2.00 km radius on a highway with a 125 km/h speed limit (about 78 mi/h), assuming everyone travels at the limit
An "ideal" banking angle assumes no friction is required to keep a car on the road as it turns. Let θ denote the banking angle, and consult the attached free-body diagram for a car making the turn. There are only 2 relevant forces acting on the car,
• the normal force with magnitude n
• the car's weight with magnitude w
and the net force points toward the center of the circle made by the turn, with centripetal acceleration
a = (125 km/h)² / (2.00 km) = 7812.5 km/h² ≈ 0.603 m/s²
Split up the forces into components acting perpendicular (⟂) and parallel (//) to the banked curve, so that by Newton's second law,
∑ F (⟂) = N + W (⟂) = m a (⟂)
and
∑ F (//) = W (//) = m a (//)
Let the direction of N be the positive perpendicular axis, and down the incline and toward the center of the circle the positive parallel axis. The net force vector and acceleration both make an angle θ with the banked curve, and W makes the same angle with the negative perpendicular axis, so that the equations above reduce to
N - m g cos(θ) = m a sin(θ)
and
m g sin(θ) = m a cos(θ)
The second equation is all we need at this point to find the ideal θ. The mass m cancels out, and we can solve for θ to get
tan(θ) = a/g ≈ (0.603 m/s²) / (9.80 m/s²) ≈ 0.0615
→ θ ≈ 3.52°
HELP AGAIN PLS
PHYSICS - I SUCK AT THIS
Answer:
You can calculate average velocity by taking the delta(x) which is the change in distance and then dividing it by the time.Hence here the tumbleweed goes from 25.6m to -14.4m. ~25.5m-(-14.4) = 39.9 m traveled 39.9m/7s= 5.7 m/sWhat does dalton theory have in common with democritus
Answer:
Democritus and Dalton has similar ideas about the atom, but Democritus based his theory more on reason than science. ... His ideas were similar to those of Democrites in that he believed that atoms were indivisible and that atoms of one substance are all alike but are different from atoms of another substance.
Explanation:
PLS MAKE ME AS BRAINLIST
Answer:
Democritus and Dalton has similar ideas about the atom, but Democritus based his theory more on reason than science. ... His ideas were similar to those of Democrites in that he believed that atoms were indivisible and that atoms of one substance are all alike but are different from atoms of another substance.
Explanation:
Write down the fundamental and derive units with their symbols in International system of units?
Answer: FUNDAMENTAL unit are the accepted standard units while DERIVED units are developed from combinations of fundamental units.
Explanation:
FUNDAMENTAL UNITS are the generally accepted units which includes the following with their symbols in international system of units:
--> length (meter) m
--> mass (kilogram) kg
--> time( second) s
--> temperature (Kelvin) k
--> current (ampere) A
--> luminous intensity ( Candela) cad
--> amount of substance ( mole) mol
DERIVED UNITS are usually developed from fundamental units and they include the following with their symbols in international system of units:
--> Area ( m²)
--> Volume (m³)
--> Speed ( m/s)
--> Velocity ( m/s)
--> Acceleration ( m/s²)
--> Force ( kgm/s²)
--> Density ( kgm/s³)
--> Power ( J/ s)
--> Pressure ( N/m²)
A student is eating french fries and needs ketchup. He shakes the ketchup bottle as it is turned upside down but the ketchup won't move. He then smacks the bottle and the ketchup moves. However, the ketchup won't stop moving until he turns the bottle upright. This is an example of ____.
Answer:
I'm thinking Newton's first law of motion.
Explanation:
"An object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force."
No machine have 100% efficiency. Why?
[tex]\huge\fcolorbox{black}{pink}{Answer}[/tex]
Because said machines have to operate in the physical world with constraints caused by the laws of physics. It’s not possible to do useful work without encountering some of these issues. The mains ones are:
Heat lost from the systemFriction (including air resistance)Electrical resistance[tex]\sf\blue{hope\:it\:helps}[/tex]
HELP ASAP!! WILL TRY TO GIVE BRAINLIEST
How are facilitated diffusion and active transport similar and different?
Answer:
Facilitated diffusion and active transport both utilize proteins to transport substances across membranes. Differences between active transport and facilitated diffusion 1. Active transport requires an input of energy, usually ATP, while facilitated transport does not.
A 45 kg wagon is being pulled with a rope that makes an angle of 38 degrees with the horizontal. The applied force is 410 N and the coefficient of kinetic friction between the wagon and the ground is 0.18.
Answer:
7.35m/s²
Explanation:
From the question we are not told what to find but we can as well find the acceleration of the wagon.
According to newton second law of motion
[tex]\sum F_x = ma_x\\Fm - Ff = ma_x\\Fm - \mu R = ma_x\\Fm- \mu mg = ma_x\\[/tex]
Fm is the moving force = 410N
[tex]\mu[/tex] is the coefficient of friction = 0.18
m is the mass = 45kg
g is the acceleration dur to gravity = 9.8m/s²
a is the acceleration of the wagon
Substitute the given data into the equation ang get ax
[tex]Fm- \mu mg = ma_x\\410 - (0.18)(9.8)(45) = 45a_x\\410 - 79.38 = 45a_x\\330.62 = 45a_x\\a_x = 330.62/45\\a_x = 7.35m/s^2\\[/tex]
Hence the acceleration of the wagon is 7.35m/s²
Consider two objects have mass m1= 6kg and m2 = 0.5kg specific heat capacity c1 = c2 =4200J/kg.℃ , respectively. Assume that, first object has temperature 20℃ and second object has temperature 90℃ . After, they placed this two object touch each other. Determine the mixture temperature of substance
Answer:c=-56+ 8
Explanation:
According to the law of conservation of matter, the number of _______ is not changed by a chemical reaction.
A.
products
B.
molecules
C.
atoms
D.
bonds
Answer:
c
Explanation:
What is the kinetic energy of a 0.5 kg puppy that is running 1.5m/s
Answer:
0.5625 Joules
Explanation:
The equation to calculate kinetic energy is:
[tex]KE = \frac{1}{2}mv^2[/tex]
So, plug in all given info and calculate:
[tex]KE = \frac{1}{2}(0.5)(1.5)^2 = 0.5625J[/tex]
And that's your answer! :)
write down local units of mass?
Answer:
Explanation: local unit of mass is kilogram
Use the diagram below to answer for the following questions for 2 points each:
1. Explain the difference between kinetic and potential energy.
2. Select two points where potential energy is seen and compare the amount of energy at each point.
2. Select two points where kinetic energy is seen and compare the amount of energy at each point.
Answer:
1. kinetic is when an object is moving and potential where the object is place
2. W and Y
3. X and Z
1. Explain why a piece of white paper looks green when viewed through a piece of green plastic?
Answer:
because the light is refracted and slowed down to make us see the color "green" and the things we see..like paper..the color "green" A white sheet of paper reflects almost all the light that falls on it. It reflects white light because it can reflect all the colors of the spectrum that comprise white light. If red light only is shone onto a white page, the red light is reflected. If the green light is shone onto the page, the green light is reflected.
Explanation:
hope this helps?
Answer:
the wave length that are reflected determine the color that an object appears to the human eye. for example,the leaves appear green because they reflect green light and absorb light of other wavelengths.This means that the light passes through the material rather than being reflected by it.
Explanation:
Why do the north poles of these two magnets repel each other? A. The magnetic field that forms between the two north poles is new and different B. Each north pole has a magnetic field that repels the magnetic field of the other. C. Each south pole has a magnetic field that repels the magnetic field of the other D. South poles repel each other, and north poles attract each other.
The statement fourth "The magnetic field lines go in directions that cannot combine to form a magnetic field between the two north poles" is the correct option (B) is correct.
What is a magnetic field?The magnetic field is defined as the field the magnetic materials generate or when an electric charge moves in a field region that generates the magnetic field.
The magnetic impact on electric charges, electric currents, and magnets is described by a magnetic field, which is a vector field. A force opposite to the sword's own motion and also the magnetic force acts on it while the charge is traveling through a magnetic field.
Thus, the statement fourth "The magnetic field lines go in directions that cannot combine to form a magnetic field between the two north poles" is the correct option (B) is correct.
Learn more about the magnetic field here:
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HELP ASAP!!!! WILL TRY TO GIVE BRAINLIEST!
Identify the structure that separates the nuclear contents from the cytoplasm.
Answer:nuclear membrane
Explanation:
Answer:
Nuclear envelope. Hope this helps.
an ice Puck travels 18 m in 3 S before it slides into the goal what is the speed of the traveling puck
Answer:
[tex]\boxed {\boxed {\sf 6 \ meters \ per \ second}}[/tex]
Explanation:
Speed can be found by dividing the distance by the time.
[tex]s=\frac{d}{t}[/tex]
The distance is 18 meters and the time is 3 seconds.
[tex]d= 18 \ m \\t= 3 \ s\\[/tex]
Substitute the values into the formula.
[tex]s=\frac{18 \ m }{ 3 \ s }[/tex]
Divide.
[tex]s= 6 \ m/s[/tex]
The speed of the puck is 6 meters per second.
Answer:
Given :-Distance travelled (D) = 18 mTime taken (T) = 3 secondTo Find :-Speed
Solution :-As we know that
[tex] \sf Speed = \dfrac{Distance}{Time} [/tex]
[tex] \sf \: Speed = \dfrac{18}{3} [/tex]
Cancelling both by 3
[tex] \sf \: Speed = 6 \: mps[/tex]
The sun shines equally on both hemispheres during the summer and winter solstices.
True
False
In the data table, distance is measured in meters and time is in seconds. Calculate the man's average velocity using the
equation average velocity = total distance
Answer:
what data table?
i can help if you attach a picture of the data :)
Answer:
equation average velocity = total distance
equation average velocity = total distance
Explanation:
why can't birds fly in space
Answer:
wouldn't they be dead and there's no oxygen in space....right???
Answer:
no gravity and no oxygen
Explanation:
the bird would die of lack of oxygen before they're even able to fly, but they can't fly anyway because there's no gravity so they'd just float
Where is the epicenter of the hypothetical earthquake as shown in the illustration below?
A. Point A
B. Point B
C. Point C
D. Point D
Answer:
Point D
Explanation:
The epicenter of a hypothetical earthquake is located at the point where the earthquake begins.
(See the attached image).
Hope it helps!
can i get a little bit idea about Quantum physics
Answer:
What is quantum physics? Put simply, it's the physics that explains how everything works: the best description we have of the nature of the particles that make up matter and the forces with which they interact. Quantum physics underlies how atoms work, and so why chemistry and biology work as they do.
What force acts on a projectile when it is launched in the air?
A. gravity
B. friction
A 750 g ball is raised 3 m off the ground and then thrown. What is the potential energy
of the ball before the throw?
Answer:
22.05 JExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass in kg
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question
750 g = 0.75 kg
We have
PE = 0.75 × 9.8 × 3
We have the final answer as
22.05 JHope this helps you
Heat from a fire warming your hands is an example of
Answer:
Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Thermal energy from the bonfire is transferred to the hands by thermal radiation. ... This is how the fire warms the hands of someone sitting near the bonfire.May
Answer:
Thermal Radiation
Explanation:
Type of heat transfer Hope this helped <3
Fossils, plants, and animals are what make rocks different from minerals.
true of fales
What is the mathematical relationship between wavelength and velocity? Inverse, horizontal, linear or quadratic? I NEED MAJOR HELP PLZ HELP ME THANK U
Answer: Wavelength is the measure of the length of a complete wave cycle. The velocity of a wave is the distance traveled by a point on the wave. In general, for any wave the relation between Velocity and Wavelength is proportionate. It is expressed through the wave velocity formula.
Explanation: For any given wave, the product of wavelength and frequency gives the velocity. It is mathematically given by wave velocity formula written as-
V=f×λ
Where,
V is the velocity of the wave measure using m/s.
f is the frequency of the wave measured using Hz.
λ is the wavelength of the wave measured using m. Velocity and Wavelength Relation
Amplitude, Frequency, wavelength, and velocity are the characteristic of a wave. For a constant frequency, the wavelength is directly proportional to velocity.
Given by:
V∝λ
Example:
For a constant frequency, If the wavelength is doubled. The velocity of the wave will also double.
For a constant frequency, If the wavelength is made four times. The velocity of the wave will also be increased by four times.
Hope you understood the relation between wavelength and velocity of a wave. I truely hope this helps you out tho! Goodluck!
23. If a jogger runs 100 meters west and then turns around and runs 30 meters east. What
was the jogger's displacement?
a. 70 meters.
b. 130 meters.
C. 30 meters.
d. 100 meters.
Answer:
A
Explanation:
if he goes to the west, the east is opposite so 100-30
The jogger's displacement was 70 meters. Hence, option (a) is correct answer.
What is displacement?The term "displacement" refers to a shift in an object's position. The symbol for it is an arrow pointing from the initial location to the ending place.
Displacement is a vector quantity as both magnitude and direction are required for defining displacement. SI unit of Displacement is meter.
Given parameter:
The first displacement of the jogger is = 100 meters along west direction.
The second displacement of the jogger is = 30 meters along east direction.
Hence, resultant displacement of the jogger along west direction = 100 meters - 30 meters
= 70 meters.
Hence, the magnitude of jogger's displacement was 70 meters. Hence, option (a) is correct answer.
Learn more about displacement here:
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