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4 years ago

Explain why atoms move at different speeds depending on whether they are liquid or solid

2 answers:

8 0

<em>atoms move at different speeds in solids and liquids ..
<u>reason :
</u>the reason is in liquids intermolecular space is more as compared to solids so atoms have more space to move and collide freely with each other ..while in the solids atoms are compactly arranged so they do not have space to move freely so speed of atoms in liquids is more than in solids :)</em>

user100 [1]4 years ago

5 0

Atoms move at different speeds in solids and liquids... Reason: The reason is in liquids intermolecular space is more as compared to solids so atoms have more space to move and collide freely with each other... while in the solids atoms are compactly arranged so they do not have space to move freely so speed of atoms in liquids is more than in solids:)

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An object is moving but we don't know its mass or velocity. A force of 20 newtons to the right

jok3333 [9.3K]

The impulse is (force) x (time) = (20 N) x (20 sec) = 400 N-sec

When we grind through the units, we find that the [newton-second]
is exactly the same as the [kilogram-meter/sec] unit-wise, and once
we know that, it doesn't surprise us to learn that impulse is equivalent
to a change in momentum (mass x speed ... also kg-m/s).

So this impulse exerted on the moving object adds 400 kg-m/s of
linear momentum to its motion, directed to the right. That may or
may not be the total change in its momentum during that 20-sec,
because our 20-N may not be the only force acting on it.

8 0

3 years ago

What is latent heat energy's definiton

tamaranim1 [39]

The heat energy which has to be supplied to change the state of a substance is called its latent heat. Latent heat does not increase the kinetic energy of the particles of the substance, so the temperature of a substance does not rise during the change of state. :))

6 0

3 years ago

Two teams are playing tug of war. Team A pulls to the right with a force of 450 N. Team B pulls to the left with a force of 415

motikmotik

Answer:

35 N to the right.

Explanation:

450 is going to the right so you subtract what is going against it. Which gives you 35. And because 450 is bigger than 415, it'll be going to the right.

6 0

3 years ago

You are at a furniture store and notice that a Grandfather clock has its time regulated by a physical pendulum that consists of

artcher [175]

Answer:

The distance is 1.026 m.

Explanation:

mass of rod, M = 1.23 kg

Length, L = 1.25 m

mass, m = 10 kg

Time period, T = 2 s

Let the distance is d.

The formula of the time period is given by

$T = 2\pi\sqrt\frac{\frac{1}{3}ML^2+md^2}{(M +m)g}\\\\2\times 2 = 4\pi^2\times \frac{\frac{1}{3}\times1.23\times1.25\times 1.25+ 10d^2}{(1.23 + 10)\times9.8}\\\\11.16 = 0.64 + 10d^2\\\\d= 1.026 m$

3 0

3 years ago

In doing a load of clothes, a clothes drier uses 18 A of current at 240 V for 41 min. A personal computer, in contrast, uses 2.2

Tpy6a [65]

Answer:

The time taken by the personal computer to 'surf' the internet is 11.13 h.

Explanation:

The expression for the energy in terms of current and time is as follows;

E= Vit

Here, V is the potential, i is the current and t is the time.

According to question, in doing a load of clothes, a clothes drier uses 18 A of current at 240 V for 41 min.

Convert time from minute to second.

$t=\frac{41}{60}s$

Calculate the energy used by the clothes drier.

Put V= 240 V, $t=\frac{41}{60}s$ and i=18 A in the expression for the energy.

$E= (240)(18)\frac{41}{60}$

E'= 2937.6 W

Therefore, the energy of a clothes drier is E'= 2937.6 W.

It is given in the problem that a personal computer, in contrast, uses 2.2 A of current at 120 V. With the energy used by the clothes drier, this computer is used to surf the internet.

Calculate the time taken by the computer to 'surf' the internet.

E'=V'i't'

Here, V' is the voltage used by the a personal computer, i' is the current and t' is the time taken by the personal computer.

Put E'= 2937.6 W, V= 120 V and i'= 2.2 A.

2937.6 = (120)(2.2)t'

$t'=\frac{2937.6}{264}$

t'= 11.13 h

Therefore, the time taken by the personal computer to 'surf' the internet is 11.13 h.

4 0

4 years ago