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3 years ago

8

The ____________is a metal retainer that keeps the rolling elements evenly spaced. N A. seal N B. separator N C. bearing N D out

er race

1 answer:

lana [24]3 years ago

3 0

Explanation:

N. B separator is the correct ande

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One and one-half moles of an ideal monatomic gas expand adiabatically, performing 7900 J of work in the process. What is the cha

mart [117]

Answer:

The temperature change is -633.15K

Explanation:

If we considered the expansion as a reversible one (to be adiabatic is one of the requirements), the work done by expansion can be written as:

$W=-n*P(v_2-v_1)=-P*(V_2-V_1)$ Where 2 and 1 subscripts mean the final and the initial state respectively. The equation negative sign says that for an expansion of the gas, the system is making work, so the energy is going out of the system.

Using the ideal gas equation, it is possible to change volume and pressure by temperatures:

$PV_2=(nRT_2)\\PV_1=nRT_1$

So,

$W=-nR(T_2-T_1)$

$(T_2-T_1)=\frac{-W}{nR}=\frac{-7900J}{(1.5mol*8.314\frac{J}{molK})}=-633.5K$

This result makes sense considering that the volume increases, so it is expected that the temperature decreases.

4 0

3 years ago

You have a match and you enter a wagon with a candle, a lamp and a fireplace. Which one do you light first?

NikAS [45]

You light the match :)

8 0

3 years ago

Read 2 more answers

Hire rubs an inflated balloon on his hair and his hair sticks to the balloon as he moves the balloon away from his head how does

sergey [27]

The options are missing and they are;

A) the electric force increases because the balloon loses its charge.

B) the electric force increases because the distance increases.

C) the electric force decreases because the distance increases.

D) the electric force decreases because his hair loses its charge.

Answer:

Correct answer is option C - the electric force decreases because the distance increases.

Explanation:

The formula for electric force is;

F = k•q1•q2/r²

Where;

K is coulombs constant

q1 and q2 are particle charges

r is distance

So,looking at the formula given earlier, if we increase the distance, the denominator will increase and thus the Force will decrease.

So the correct option is option C

8 0

3 years ago

Read 2 more answers

The gravitational force between two objects that are 2.1 times 10^-1 m apart is 3.2 times 10^-6 N. If the mass of one object is

Shtirlitz [24]

Answer:

Mass of the other object is 38.45 kg.

Explanation:

Given:

The gravitational force between two objects is, $F=3.2\times 10^{-6}$ N

Mass of one object is, $m_{1}=55\ kg$

Distance between the objects is, $r=2.1\times 10^{-1}\ m$

Gravitational constant is, $G =6.674\times 10^{-11}\ m^3 kg^{-1}s^{-2}$

Let the mass of the other object be $m_{2}\ kg$

Gravitational force is given as:

$F=\frac{Gm_1m_2}{r^2}$

Plug in the given values and solve for $m_2$ . This gives,

$3.2\times 10^{-6}=\frac{6.674\times 10^{-11}\times 55\times m_2}{(2.1\times 10^{-1})^2}\\3.2\times 10^{-6}=\frac{6.674\times 10^{-11}\times 55\times m_2}{0.0441}\\3.2\times 10^{-6}=8.3236\times 10^{-8}m_2\\m_2=\frac{3.2\times 10^{-6}}{8.3236\times 10^{-8}}= 38.45\ kg$

Therefore, the mass of the other object is 38.45 kg.

3 0

4 years ago

Describe a vibration that is not periodic. NO LINKS PLEASE

Paraphin [41]

Answer:

1)The position change of almost any manually operated room light switch.

2) Sunlight striking a point on the ground on a partly cloudy and windy day

Explanation:

4 0

3 years ago