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3 years ago

According to kinetic molecular theory, which statement best describes collisions between gas particles?

Physics

1 answer:

Mkey [24]3 years ago

5 0

A they are elastic.
being in random motion means they're not predictable.
being elastic, they don't stick together

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The uniform slender bar of mass m and length l is released from rest in the vertical position and pivots on its square end about

borishaifa [10]

Answer:

A) 0.188

B) 53.1 ⁰

Explanation:

taking moment about 0

∑ Mo = Lo∝

mg 1/2 sin∅ = 1/3 m L^2∝

note ∝ = w $\frac{dw}{d}$ ∅

forces acting along t-direction ( ASSUMED t direction)

∑ Ft = Ma(t) = mr∝

mg sin ∅ - F = m* 1/2 * 3g/2l sin∅

therefore F = mg/4 sin∅

forces acting along n - direction ( ASSUMED n direction)

∑ Fn = ma(n) = mr( $w^{2}$ )

= mg cos∅ - N = m*1/2*3g/1 ( 1 - cos∅ )

hence N = mg/2 ( 5cos∅ -3 )

A ) Angle given = 30⁰c find coefficient of static friction

∪ = F/N

= $\frac{\frac{mg}{4}sin30 }{\frac{mg}{2}(5cos30 -3) }$ = 0.188

B) when there is no slip

N = O

= 5 cos ∅ -3 =0

therefore cos ∅ = 3/5 hence ∅ = 53.1⁰

4 0

3 years ago

The diagram shows the placement of four bar magnets within the magnetic field of a larger bar magnet. Use claim, evidence, reaso

Alisiya [41]

Different poles : Attract

Similar Poles: Repulse

For the two upper magnets ( 1, 4 ) N-S , N-S ( so attraction )

For the two lower (2,3) S-S S-S ( repulsion )

Considering this case:

F = kQ1Q2/r^2 (coulomb law)

So F is inversely proportional to the distance so the more near the magnet to the main one , the more force it experiences.

Magnet 2 experiences the greatest repulsion force.

3 0

3 years ago

Name the two types of vaporization and explain the difference between them. Give one example of each.

kolezko [41]

Evaporation and boiling.
Evaporation refers to only the surface level turning it into a gas and the vaporization pressure of the liquid remains low.
When a substance boils it’s pressure is high and the surface evaporated along with the rest of the liquid at an equal rate. A sign of boiling is the presence of bubbles, which occur only in the process of boiling and not in evaporation.
A example of boiling is heating water up to the point until you see steam and bubbles.
A example of evaporation is the melting of an ice cube.
Hope this helps

4 0

3 years ago

A 1300-N crate rests on the floor. How much work is required to move it at constant speed (a)

kherson [118]

a) The work done is 920 J

b) The work done is 5200 J

Explanation:

In this first part of the problem, the crate is moved horizontally at constant speed.

The work required in this case is given by

$W=Fd cos \theta$

where

F is the magnitude of the force applied

d is the displacement of the crate

$\theta$ is the angle between the direction of the force and of the displacement

Here the crate is moved at constant speed: this means that the acceleration of the crate is zero, and so according to Newton's second law, the net force on the crate is zero: this means that the force applied, F, must be equal to the force of friction (but in opposite direction), so

F = 230 N

The displacement is

d = 4.0 m

And the angle is $\theta=0^{\circ}$ , since the force is applied horizontally. Therefore, the work done is

$W=(230)(4.0)(cos 0^{\circ})=920 J$

In this case, the crate is moved vertically. The force that must be applied to lift the crate must be equal to the weight of the crate (in order to move it a constant speed), therefore

F = W = 1300 N

The displacement this time is again

d = 4.0 m

And the angle is $\theta=0^{\circ}$ , since the force is applied vertically, and the crate is moved also vertically. Therefore, the work done on the crate this time is

$W=(1300)(4.0)(cos 0^{\circ})=5200 J$

Learn more about work:

brainly.com/question/6763771

brainly.com/question/6443626

#LearnwithBrainly

4 0

3 years ago

Which mountains are<br> YOUNGEST?

Hoochie [10]

The answer is B,
because it is more round and lower than the other mountains.
The steeper and more pointy and higher a mountain is, the older it is.

Hope this helps!
-Jana

3 0

3 years ago

Read 2 more answers