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3 years ago

15

Atoms and molecules are constantly in motion. The more kinetic energy atoms or molecules have, the faster they move about. In wh

ich state of matter do the atoms and molecules have the least kinetic energy?
Question 4 options:

In a plasma

In a gas

In a liquid

In a solid

1 answer:

lianna [129]3 years ago

4 0

Answer:solid

Explanation:And a solid the malicules are compact so they can move

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The speed of sound in air on a certain stormy day is about 1130 feet per second. you see a flash of lightning striking some dist

Anna35 [415]

Answer 4,520 feet Explanation The light and the sound were produced at the same time but sound took long to reach since is speed is much lower than the speed of light. Speed is the rate of change of distance. So; Distance = speed × time = 1130 × 4 = 4,520 feet.

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3 years ago

A railroad car of mass M moving at a speed v1 collides and couples with two coupled railroad cars, each of the same mass M and m

Tatiana [17]

Answer:

Explanation:

Given

mass of each railroad is M

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conserving Momentum

$Mv_1+2Mv_2=3M v_f$

where v_f is the final velocity of combined system

$v_f=\frac{v_1+2v_2}{3}$

(b)Initial Kinetic Energy

$=\frac{1}{2}Mv_1^2+\frac{1}{2}2Mv_2^2$

$=\frac{1}{2}Mv_1^2+Mv_2^2$

Final Kinetic Energy

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Loss in Kinetic Energy

$=\frac{1}{2}Mv_1^2+Mv_2^2-\frac{1}{6}M(v_1^2+4v_2^{2}+4v_{1}v_2)$

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4 years ago

My auestion is !

kkurt [141]

G has the value 6.67 × 10-11 Newtons kg-2 m2.

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4 years ago

A particle is moving along the x-axis so that its position at any time t is greater than and equal to 0 is given by x(t)=2te^-t?

erastovalidia [21]

For speed you can differentiate the equation, for acceleration you can again differentiate the equation .
at t=0 the particle is slowing down , when you get equation for velocity put t=0 then only -1 is left

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3 years ago

Mr. Smith is designing a race where velocity will be measured. Which course would allow velocity to accurately get a winner?

REY [17]

Velocity is Displacement / Time

In order for Velocity to Accurately get a winner, you should be able to determine the race by looking at <em><u>How Far the competitors are from the starting point in the shortest amount of time

</u></em><u />so the answer should be something like : a 5 mile course from the center of the town heading north to the outskirts of the town

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4 years ago