What is a hipótesis?
Answer:
an educated guess about the solution to the problem.
Explanation:
the hypothesis is is a specific, testable PREDICTION about what you expect to happen in your study.
A ball is moving at 2 m/s and has a momentum of 12 kg•m/s. What is the ball's mass?
Answer:
6 kg
Explanation:
p = mv
The strike zone is an area over home plate extending approximately from
the armpits to the knees of a batter when in the batting position. The ball
must be pitched through this area in order for a strike to be called
*HELP ITS A TEST AND I GOT 2 MINUTES LEFT*
Answer:
if it is a true or false, the answer is true
Explanation:
At the bottom of a frictionless ramp, a 2kg mass reaches a speed of 9 m/s, how high is the top of the ramp? *
1 point
18m
8.2m
Cannot determine
4.1m
What is the kinetic energy of 1000 kg car moving at a speed of 15 m/s?
Answer:
Explanation:
KE =1/2mv²
KE =1/2(1000kg)(15m/s)²
KE = 500kg (225 m²/s²)
KE = 112,500 JJ
In single-slit diffraction, what happens to the dark fringes if the slit gets wider?.
The spacing between the fringes does not depend on the width of the slit.
The light intensity produced by the slits increases with increased width of the slit. The screen thus develops brighter fringes as the slit width increases.
On the screen, coloured fringes will be created if the white light replaces monochromatic light.
What is diffraction?Diffraction is the breaking up of an electromagnetic wave as it passes a geometric structure (e.g. a slit), followed by reconstruction of the wave by interference. Diffraction occurs for all types of waves, including sound waves.
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What would happen to the speed of a sound wave if it moved from ocean water to air? What would happen to the speed of a sound wave if it moved from a cooler room to a warmer one?.
Answer:
In both scenarios the speed would increase
Answer:
What would happen to the speed of a sound wave if it moved from ocean water to air?
✔ It would slow down.
What would happen to the speed of a sound wave if it moved from a cooler room to a warmer one?
✔ It would speed up.
:)
A blue and a green billiard ball, each with a mass of 0.15 kg, collide directly. Before the collision, the blue ball had a speed of 3 m/s while the green ball had a speed of 2 m/s. After the collision, the blue ball stays in place while the green ball continues in motion.
Answer:
.
Explanation:
Can you specify what is the question asking for
A student holds a pipe vertically, with one end submerged in water while the opposite end is out in the air. Just above the pipe, the student holds a tuning fork. The student carefully moves the pipe up and down, varying the level of water inside of it, until they detect a strong resonant sound.
The student detects this sound when the length of air inside of the pipe measures 56.25 cm, and then again when the length is 68.75 cm. Taking the speed of sound in air to be of 340. m s–1, what is the frequency of the tuning fork?
With the use of formula, the frequency of the tuning fork is 13.6 Hz
RESONANCEA tuning fork can be used to determine the speed of sound in air using a resonance tube. The apparatus needed for this experiment are;
Tuning forkbeakerglass tubewaterThe experiment begins when a student holds a pipe vertically, with one end submerged in water while the opposite end is out in the air. Just above the pipe, the student holds a tuning fork. The student carefully moves the pipe up and down, varying the level of water inside of it, until they detect a strong resonant sound.
Given that the student detects this sound when the length of air inside of the pipe measures 56.25 cm, and then again when the length is 68.75 cm. Taking the speed of sound in air to be of 340. m s–1.
The parameters given are:
[tex]L_{1}[/tex] = 56.25 cm
[tex]L_{2}[/tex] = 68.75 cm
V = 340 m/s
The formula to use for this question is
V = 2F( [tex]L_{2}[/tex] - [tex]L_{1}[/tex] )
340 = 2F (68.75 - 56.25)
340 = 2 x 12.5 x F
340 = 25F
F = 340/25
F = 13.6 Hz
Therefore, the frequency of the tuning fork is 13.6 Hz
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which object describea an object that has no unbalanced force acting on it
Answer:
If an objecta is at equilibrium, then all the individual forces are balanced. There is no unbalanced force acting upon the objecta.
Simple pendulum is system in which a bob is attached to a string and oscillates when it is disturbed from equilibrium. Suppose time period of oscillation of simple pendulum depends on length (l) of string, mass (m) of the bob, and acceleration due to gravity (g). Derive expression for its time period using method of dimensions.
The expression for the time period using method of dimensions is [tex]T = [L]^{1/2}\times [LT^{-2}]^{-1/2}[/tex].
Period of oscillationThe period of oscillation of a simple pendulum is the time taken for the pendulum to make a complete rotation.
The period of oscillation of a simple pendulum is calculated as;
[tex]T = 2\pi \sqrt{\frac{l}{g} }[/tex]
where;
L is length (m)
g is acceleration due to gravity (m/s²)
The expression for the time period using method of dimensions is given as;
[tex]T = [L]^{1/2}\times [LT^{-2}]^{-1/2}[/tex]
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Problem 23.5 The electric field strength 1.5 cm from an electric dipole, on the axis of the dipole, is 1.5×105 N/C.
We have that the dipole moment in nCm is considering the parameters
electric field strength 1.5 cm and the axis of the dipole, is 1.5×105 N/C. is
P=112.5nCmFrom the question we are told
The electric field strength 1.5 cm from an electric dipole, on the axis of the dipole, is 1.5×105 N/C.
Electric fieldGenerally the equation for the Electric field is mathematically given as
[tex]E=\frac{2P}{4\pi*r^3}\\\\Therefore\\\\P=\frac{ 1.5×10^5*1.5*10^{-3}}{2}\\\\[/tex]
P=112.5nCmFor more information on electric field visit
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Which one is the best explanation of energy? Question 1 options: making transformations the ability to do work conservation of power measuring joules.
Energy is best defined as the ability to do work. Option A is correct. The work is the transformation of energy.
What is energy?Energy can be defined as the ability to do work because the work is the transformation of energy.
The work is done on an object the energy is transferred to the object from the first object.
Power is the measurement of the energy transfer over time. It can be calculated by the formula,
[tex]P = \dfrac Wt[/tex]
Where,
[tex]P[/tex]- power
[tex]W[/tex] - work
[tex]t[/tex] - time
Therefore, energy is best defined as the ability to do work.
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Answer:The ability to do work
Explanation:
The flow of electricity in a certain path is called.
The flow of electricity in a certain path is the circuit.
A model rocket accelerates upwards at 50m/s^2. Determine the velocity of the model rocket when its fuel is exhausted, 1 second after ignition. You may assume that the rockets initial velocity on the launch pad is zero.
Answer:
The velocity of model rocket 1 second after ignition is 50 m/s.
Explanation:
time taken(t) = 1 second
initial velocity (u) = 0 m/s
acceleration (a) = 50 m/s²
final velocity (v) = ?
Now,
a = (v-u)/t
or, 50 = (v-0)/1
or, 50 = v
so, v = 50 m/s
Apply first equation of kinematics
[tex]\\ \tt\hookrightarrow v=u+at[/tex]
[tex]\\ \tt\hookrightarrow v=0+50(1)[/tex]
[tex]\\ \tt\hookrightarrow v=50+0[/tex]
[tex]\\ \tt\hookrightarrow v=50m/s[/tex]
A constant unbalanced force of friction acts on a 15.0-kilogram mass moving along a horizontal surface at 10.0 meters per second. If the mass is brought to rest in 1.50 seconds, what is the magnitude of the force of friction
The mass slows to a rest from an initial speed of 10.0 m/s in a matter of 1.50 s. If we assume constant acceleration, then the mass has acceleration a such that
0 = 10.0 m/s + a (1.50 s) ⇒ a ≈ -(10.0 m/s)/(1.50 s)
The net force acting on the mass as it slows down is
∑ F[horizontal] = -F[friction] = ma
where m = 15.0 kg, and we take the direction in which friction is acting to be negative. Then
-F[friction] = -(15.0 kg) (10.0 m/s)/(1.50 s) ⇒ F[friction] = 100 N
HELP PLZ [Kinetic and Potential Energy]
An object has a kinetic energy of 18 J. If the object's
speed is tripled, then its new kinetic energy will be
J.
Answer:
ok its 58
Explanation:
yes
Would a bottleneck event of the plants in an area from the video at the top of this page result in the need for primary or secondary succession?
A: Primary Succession
B: Secondary Succession
subject: Environmental Science
The bottleneck event of the plants in an area results in secondary succession.
What is bottleneck event?A bottleneck is an event that drastically reduces the population size of an organism. The bottleneck may be caused by various events, such as an environmental disaster, the hunting or habitat destruction that results in the deaths of organisms.
Secondary successionSecondary succession is a type of ecological succession in which plants and animals recolonize a habitat after a major disturbance such as a devastating flood, wildfire, landslide, lava flow, or human activity e.g., farming or road or building construction.
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why is there a metal grid in a microwave? explain using reference to the em spectrum
Answer:
Visible light has much smaller wavelengths and can pass through the holes unobstructed. It isn't possible to see (resolve) objects and features smaller than the wavelength of light (electromagnetic radiation) used so this is why the mesh works.
Explanation:
1. A meter rule is found to balance at the 48cm mark. When a body of mass 60g is suspended at the 6cm mark the balance point is found to be at the 30cm mark. Calculate, i) the mass of the meter rule 11) the distance of the balance point from the zero end, if the body were moved to the 13cm mark.
Hi there!
We can use a summation of torques to solve.
Recall the equation for torque:
[tex]\large\boxed{\Sigma \tau = rF}[/tex]
r = distance from fulcrum (balance point)
F = force (in this instance, weight, N)
We can set the fulcrum to be the balance point of 30 cm.
Thus:
Meter ruler:
Center of mass at 48 cm ⇒ 48 - 30 = 18 cm
Object:
At 6cm ⇒ 30 - 6 = 24 cm
For the ruler to be balanced:
[tex]\large\boxed{\Sigma \tau_{cc} = \Sigma \tau_{ccw}}[/tex]
Thus:
[tex]M_Rg(18) = 60g(24)\\M_R = \frac{60(24)}{18} = \boxed{80 g}[/tex]
The mass of the ruler is 80 grams.
If the body were moved to 13 cm:
B (balance point) - 13 = distance of object
48 - B = distance from ruler center of mass to balance point
[tex]80g(48 - B) = 60g(B - 13)\\\\3840 - 80B = 60B - 780\\\\4620 = 140B\\\boxed{B = 33 cm}[/tex]
The new balance point would be 33cm from the zero end.
What is the net electric force on the charge located at the lower right-hand corner of the triangle.
Answer:
[tex]\sqrt{3}\frac{kq^{2}}{a^{2} }[/tex]
Explanation:
none sadly
The net electric force on the charge is located at the lower right-hand corner of the triangle is [tex]Fr = \sqrt{3} \times\dfrac{q^2}{4 \times \pi \times 0 \times a^2 }[/tex].
What is electric force?Electric force is the attraction or repulsive interaction between any two charged things. Similar to any force, Newton's laws of motion describe how it affects the target body and how it does so. One of the many forces that affect objects is the electric force.
The given electrostatic force is:
F = k x Q1 x Q2 / R²
here, Q1 & Q2 = charges
R = distance between charges
The force between q and q
F1 = k x q x q / a² = F
The force between q and '-2q'
F2 = k x q x 2 x q / a² = 2 x F (towards '-2q' charge)
From the diagram given below, angle between F1 & F2 = A = 120°
So, the resultant force will be:
[tex]Fr = \sqrt(F1^2 + F2^2 + 2 \times F1 \times F2 \times cosA)\\Fr = \sqrt(F^2 + (2 \times F)^2 + 2 \timesF \times2 \timesF \timescos(120)\\Fr = \sqrt(5 \times F^2 - 2 \timesF^2)\\Fr = F \times \sqrt(3)[/tex]
Therefore, the net electric force on the charge is located at the lower right-hand corner of the triangle is [tex]Fr = \sqrt{3} \times\dfrac{q^2}{4 \times \pi \times 0 \times a^2 }[/tex].
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The question is incomplete. Your most probably complete question is given below:
The image of the triangle is attached below:
Define kinetic energy and thermal energy. Describe what happens to each as the temperature of a substances increases.Explain the process that causes dew to form on blades of grass.
Answer:
Heat is radiated, atmospheric moisture condenses at a rate greater than that at which it can evaporate, resulting in the formation of water droplets.
Explanation:
Dew forms on blades of grass as the temperature of the grass drops below the dew point temperature, causing water vapor in the air to condense into liquid water droplets on the cooler surface of the grass.
Kinetic Energy and Thermal Energy:
Kinetic Energy:
Kinetic energy is the energy possessed by an object due to its motion. It depends on both the mass of the object and its velocity. The formula for kinetic energy is KE = 1/2 * mass * [tex]velocity^2[/tex]. As an object moves faster or its mass increases, its kinetic energy also increases.
Thermal Energy:
Thermal energy, also known as heat energy, is the total energy of the particles (atoms and molecules) in a substance. It includes both the kinetic energy of the particles' random motion and the potential energy of their interactions. The temperature of a substance is a measure of the average kinetic energy of its particles. As the temperature of a substance increases, the average kinetic energy of its particles also increases, leading to higher thermal energy.
Effect of Increasing Temperature on Kinetic Energy and Thermal Energy:
When the temperature of a substance increases:
The average kinetic energy of its particles increases.
The kinetic energy of individual particles increases, resulting in faster molecular motion.
The thermal energy of the substance increases due to the collective increase in kinetic energy of its particles.
Formation of Dew on Blades of Grass:
Dew forms on blades of grass due to a process called condensation. Condensation occurs when water vapor in the air comes into contact with a surface that is at a lower temperature, causing the water vapor to change from its gaseous state to a liquid state.
At night, the Earth's surface loses heat through radiation, and this cooling effect reduces the temperature of the grass blades and other objects on the ground. As the temperature of the grass drops below the dew point temperature, which is the temperature at which the air becomes saturated with water vapor, water vapor in the surrounding air begins to condense into tiny water droplets on the surface of the grass blades.
The formation of dew is more common on clear, calm nights when there is less heat retained by the atmosphere and the ground radiates more heat. Dew can also form when the relative humidity is high, as the air already contains a significant amount of water vapor, making it more likely to reach the dew point temperature.
Hence, dew forms on blades of grass as the temperature of the grass drops below the dew point temperature, causing water vapor in the air to condense into liquid water droplets on the cooler surface of the grass.
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if the intensity of a person's voice is 4.6 x 10^-7 w/m^2 at a distance of 2.0 m, how much sound power does that person generate.
The sound power the person generated is [tex]2.313 \times 10^{-5} \ W[/tex].
Area of the sound waveThe area of the sound wave is calculated as follows;
[tex]A = 4\pi r^2\\\\A = 4 \pi \times (2)^2\\\\A = 50.272 \ m^2[/tex]
Power generatedThe sound power the person generated is calculated as follows;
[tex]P = I A\\\\P = 4.6\times 10^{-7} \ W/m^2 \ \ \times \ \ 50.272 \ m^2\\\\P = 2.313 \times 10^{-5} \ W[/tex]
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Is the force of gravity that attracts my body to the Earth related to the force of gravity between the planets and the Sun
Certainly gravity is a force that exists between the Earth and the objects that are near it. As you stand upon the Earth, you experience this force.
Vera and her three sisters received the same amount of money to go to the school festival. Each girl spent $12. Afterward, the girls had $24 altogether. determine the amount of money each girl recived
Answer:
$18
Explanation:
Each of the was qiven $18
All together =24
24 divide it by 4 (because there were 4 people there)
= 6 (6+6+6+6)
= 24
=6+12=18
.Hence each of them was given $18
Answer:
4(m−12)=24
4m-48=24
4m= 24+48
4m=72
m=18
Explanation:
it correct i did it on my school work and get an A+
Write a short paragraph that explains the central idea of the article. Use at least two details from the article to support your response. ( Deadly and life-giving elements of the periodic table. )
If an object sinks in water, would you say it is more dense or less dense than water?
Answer:
More dense
Explanation:
Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.
help asap please, hope you can read it
Answer:
Wire length, current value, and potential difference certainly belong to the continuous category.
Perhaps, eye color would be the 4'th value because of the continuity involved
2. While all economies are mixed, which economic systems model does the nited States most resemble?
market
command
traditional
none of the above
Answer:
market
Explanation:
took the quiz
what is the acceleration of something that is not moving?
