Answer:
The speed of 1 kg ball is 3 times of the speed of 9 kg ball.
Explanation:
It is given that, 1 kg ball and 9 kg ball have the same kinetic energy.
We need to compare their speeds.
The kinetic energy of an object is given by :
[tex]K=\dfrac{1}{2}mv^2[/tex]
Where
m is mass and v is speed
As kinetic energy is same. So,
[tex]m_1v_1^2=m_2v_2^2\\\\\dfrac{v_1^2}{v_2^2}=\dfrac{m_2}{m_1}\\\\\dfrac{v_1^2}{v_2^2}=\dfrac{9}{1}\\\\\dfrac{v_1}{v_2}=\dfrac{3}{1}\\\\v_1=3v_2[/tex]
So, the speed of 1 kg ball is 3 times of the speed of 9kg ball.
Force is measured in what unit? What is this unit equal to in other units?
Answer:
Explanation:
Nnewton=kgm/s²
1 nm is equal to how many centimeters
Answer:
0,00000001 cm = 1 nm is correct
5. A helicopter is exerting a force of 100,000 newtons. What is its mass
if it is accelerating at a rate of 100 m/s??
Which statement best explains why light can travel with or without a medium?
A medium is necessary for light waves to travel.
Light waves cannot travel in a vacuum.
Light waves are longitudinal waves that do not require a medium to travel.
Transverse waves do not require a medium to travel.
Answer:
Transverse Waves do not require a medium to travel
Explanation:
Two major types of energy waves are longitudinal waves and transverse waves. A longitudinal wave is a wave where the particles of matter in the medium move in a parallel direction to the motion of the wave. This shows the energy transport and particle movement. The particles of matter only move temporarily. A wave is transferred energy it does not transfer particles of matter. A transverse wave is a wave in which the particles of matter in the medium move in a perpendicular direction to the motion of the wave.
Answer:
Transverse waves do not require a medium to travel.
Explanation:
Why does an ice cube float on water?
Answer:
Ice cubes float on water because they are less dense.
Explanation:
Ice is about 9% less dense than water. Water is heavier, so ice is lighter, causing it to float. It is less dense because the density of water decreases along with a decrease in temperature. Therefore, causing ice to be less dense than water
true or false. because the speed of an object can change from one instant to the next, dividing the distance covered by the time of travel gives constant speed
true. Because the speed of an object can change from one instant to the next, dividing the total distance covered by the time of travel gives. average speed.
Answer:
False.
Explanation:
Dividing the distance covered by the time would give us the average speed, not a constant speed. Constant speed exists only if the speed of an object does not change.
A biker begins to move from an initial speed of 0.0 m/sec to a final speed of 25 m/sec in 10 sec. what is the acceleration of the skater?
Whenever one object exerts a force on another object, the second object exerts a force of the same magnitude on the first object, but in the opposite direction
Answer:
A
Explanation:
Newton third law of motion state that action and reaction are equal and opposite
Answer:
Always true
Explanation:
I got it right on the test.
A car accelerates at 2.90 m/s2. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 23.6m/s?
Answer:
[tex] \huge{ \boxed{ \bold{ \sf{8.13 \: seconds}}}}[/tex]
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☯ Question
A car accelerates at 2.90 m/s . Assuming the car starts from rest , how much time does it need to accelerate to a speed of 23.6 m/s ?☯[tex] \underbrace{ \sf{Required \: Answer : }}[/tex]
✒ Given :
Initial velocity ( u ) = 0 Final velocity ( v ) = 23.6 m/sAcceleration ( a ) = 2.90 m/s²✒ To find :
Time ( t )✎ We know ,
[tex] \boxed{ \underline{ \sf{acceleration \: (a) \: = \frac{final \: velocity \: (v) - initial \: velocity \: (u )}{time \: ( \: t \: )}}}}[/tex]
Substitute the values :
➵ [tex] \sf{2.90 = \frac{23.6 - 0}{t}} [/tex]
➵ [tex] \sf{2.90 = \frac{23.6}{t}} [/tex]
Apply cross product property
➵ [tex] \sf{2.90 \: t \: = 23.6}[/tex]
Divide both sides by 2.90
➵ [tex] \sf{ \frac{2.90 \: t}{2.90} = \frac{23.6}{2.90} }[/tex]
➵ [tex] \sf{t = 8.13 \: seconds}[/tex]
Hope I helped!
Have a wonderful time シ
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A 2.5. Gram arrow enters a 100 g apple with a speed of 115 m/s. If the apple was originally at rest, then what speed will it have as the arrow enters it? Remember the formula is P=MxV
Answer:
The speed of the apple will be 2.81 m/s when the arrow enters it.
Explanation:
We can find the speed of the apple by conservation of linear momentum:
[tex] p_{i} = p_{f} [/tex]
[tex] m_{ap}v_{ap_{i}} + m_{a}v_{a_{i}} = m_{ap}v_{ap_{f}} + m_{a}v_{a_{f}} [/tex]
Where:
[tex]m_{ap}[/tex] is the mass of the apple = 100 g = 0.1 kg
[tex]m_{a}[/tex] is the mass of the arrow = 2.5 g = 0.0025 kg
[tex]v_{ap_{i}}[/tex] and [tex]v_{ap_{f}}[/tex] is the initial and final speed of the apple respectively
[tex]v_{a_{i}}[/tex] and [tex]v_{a_{f}}[/tex] is the initial and final speed of the arrow respectively
Since the apple was originally at rest ([tex]v_{ap_{i}}[/tex] = 0) and knowing that [tex]v_{a_{f}}[/tex] = [tex]v_{ap_{f}}[/tex] when the arrow enters into the apple, we have:
[tex] 0 + 0.0025 kg*115 m/s = v(0.0025 kg + 0.1 kg) [/tex]
[tex]v = 2.81 m/s[/tex]
Therefore, the speed of the apple will be 2.81 m/s when the arrow enters it.
I hope it helps you!
What kind of father grows his children and then swallows them once they are grown?
there isnt choices its a type it in the box thing
Answer:a farmer?
Explanation:
Because they raise their livestock or plants then eat them once they are big enough or fully grown?
Which is the larger value: 6 x 10^3 or 6 x 10^8 ?
Help!
Answer:
6 x 10^8
Explanation:
Take out both the 6, then look at what exponent is bigger, 3 or 8, 8
Answer:
105 = 10 x 10 x 10 x 10 x 10 = 100,000 (5 zeros)
108 = 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 = 100,000,000 (8 zeros)
Explanation:
A 2.00 kg ball is thrown upward at some unknown angle from
the top of a 20.0 m high building. If the initial magnitude of the
velocity of the ball is 20.0 m/s. What is the value of total
energy?
Answer: 792J
Explanation:
The value of the total energy will be "792 Joules". To undestand the calculation, check below.
Energy and VelocityAccording to the question,
Mass of ball, m = 2.0 kg
Building's height, h = 20.0 m
Ball's initial velocity, v = 20.0 m/s
We know the formula,
Potential energy (U) = mgh
Kinetic energy (K) = [tex]\frac{1}{2}[/tex] mv²
and,
The total energy be:
= U + K
= mgh + [tex]\frac{1}{2}[/tex] mv²
By substituting the values,
= 2.00 × 9.8 × 20.0 + [tex]\frac{1}{2}[/tex] × 2.00 × (20.0)²
= 392 + 400
= 792 Joules
Thus the above answer is correct.
Find out more information about energy here:
https://brainly.com/question/20562687
which of the following is not an example transverse wave?
1) X-rays
2) Ocean waves
3) Microwaves
4) Ripples on a pond
5) Hitting a slinky at one end
Answer:
2, Ocean waves
Explanation:
Transverse waves look more like ocean waves, and have the same movement.
1. A pumpkin with a mass of 2 kg accelerates 2 m/s/s when an unknown force is applied to it. What is the amount of the force?
Answer:
4 Newton
Explanation:
F=ma therefore 2kg*2m/s/s=4 Newton
Forces can be:
A. Pushes only
B. Pulls only
C. Pushes and pulls
Answer:
c
Explanation:
In 2-3 sentences, explain the difference between constructive and destructive interference.
Plz help!!
If you drop a 60 kg rock and a 30 kg rock from the same height at the same time and in the absence of air drag, they fall with?
Give a description of of lower mantle
Answer:
The lower mantle is the liquid inner layer of the earth from 400 to 1,800 miles below the surface.
Explanation:
True or False: The medium moves up and down in a transverse wave.
A particle starts to move in a straight line with a velocity of 10 m/s
and deceleration - 2 m s-2. What will the velocity of particle be after
5 s and after 10 s?
a 30 m/s after 5 s and 20 m/s after 10 s.
b Zero after 5 s and 30m/s after 10 s.
C 20 m/s after 5 s and 30 m/s after 10 s.
d Zero after 5 s and -10 m/s after 10 s.
Answer:
Explanation:
Lol man
Answer: Zero after 5 s and -10 m/s after 10s
Explanation:
Which of the following is composed of two conductors separated by an insulator? O A. A resistor O B. Light C. A point charge O D. A capacitor
Answer is D. A capacitor
HELP!!!
i’ve been stuck at this question for a whole day
2. A car is sitting at the top of a hill that is 14 m high. The car has a mass of 53 kg. The car has
energy. Calculate it.
Found throughout the nervous system, __________ aid and support the function of neurons.
Answer:
Glia
Explanation:
Answer:
C
Explanation:
Which are the products in the equation CH3SH + 4O2 → CO2 + SO2 +2H2O? Check all that apply. CH3SH, O2 ,CO2, SO2, H2O
Answer:
C D E is the answer
Explanation:
The products of the reaction are; CO2, SO2, H2O.
What is a chemical reaction equation?A chemical reaction equation equation is composed of;
Reactants on the left hand sideProducts on the right hand sideThe interaction between the reactants give rise to the formation of the products. The products are the result of rearrangement of atoms in the reactants.
For the reaction; CH3SH + 4O2 → , the products of the reaction are; CO2, SO2, H2O.
Learn more about chemical reaction: https://brainly.com/question/6876669
4. How long would it take for a water balloon to fall 39 m if we dropped it starting from rest down an
elevator shaft from the 13th floor? Ignore air resistance and use a = -9.8 m/s2.
x, = x + vt + (1/2) a t?
Answer:
Around 2.8212 sec
Explanation:
Given the eqn x=1/2at^2+vot
your vo=0
39=1/2(-9.8)t^2
=7.95=t^2
=2.82sec
5. A force probe is used to pull the block with a constant speed. The probe measures a force of
1.8 N. What is the size of the friction force you are pulling with? Explain how you came up
with this answer.
Answer:
Frictional Force = 1.8 N
Explanation:
From Newton's Second Law, we know that the acceleration is produced in an object, whenever an unbalanced force is applied to it. So, for the production of acceleration application of an unbalanced force is necessary. Since, the block is moving with uniform speed in this case. Therefore, there is no acceleration involved in the motion of block. So, the all the forces acting on the block must cancel the effect of each other. So, that there is no unbalanced force to produce any acceleration. Therefore, the frictional force must be equal to the applied force in order to cancel its effect and balance it.
Frictional Force = Applied Force
Frictional Force = 1.8 N
a 3.5 kg mass has an initial velocity of 4.0 m/s. How much force is required to increase the velocity of the mass to 8.0 m/s in 3.0 seconds?
Answer:
4.67 N of force are required
Explanation:
The second Newton's law states the net force exerted on a body of mass m that has an acceleration a, is given by:
F=m.a
On the other hand, the kinematics equations relate the acceleration with the change of speed over time, expressed as:
[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]
We are given the initial speed of vo=4 m/s on a mass of m=3.5 Kg, the final speed of vf=8 m/s which took t=3 seconds.
The acceleration is:
[tex]\displaystyle a=\frac{8-4}{3}=1.33[/tex]
[tex]a=1.33\ m/s^2[/tex]
Thus, the force is:
[tex]F=3.5\ Kg\cdot 1.33\ m/s^2[/tex]
[tex]F=4.67\ N[/tex]
4.67 N of force are required
A ball is thrown horizontally from the top of a building at 2 m/s. It takes 3 seconds to reach the ground. How far did the ball travel horizontally (dx)?