4 years ago

When heat is added to a substance, describe how the molecules are affected.

Physics

1 answer:

Zolol [24]4 years ago

3 0

The atoms vibrate faster and the space between atoms spread

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A 75-hp compressor in a facility that operates at full load for 2500 h a year is powered by an electric motor that has an effici

stealth61 [152]

Answer:

$C = 16544.35\, USD$

Explanation:

The annual electricity cost is:

$C = (\frac{1}{0.93} )\cdot(75\, h.p.)\cdot(0.746\, kW)\cdot(2500\,h)\cdot(\frac{3600\,s}{1\,h} )\cdot(\frac{1\,kWh}{3600\,kJ} )\cdot (0.11\,\frac{USD}{kWh} )$

$C = 16544.35\, USD$

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3 years ago

calculate the work done by 2N force directed at 30 degree to the vertical to move a 500g box a horizontal distance of 400 cm acr

sattari [20]

Answer:

there is no picture :o?

Explanation:

:oo

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3 years ago

Which characteristic would you expect from a sample with a pH of 9

Verizon [17]

I would expect it to be slightly basic.

7 0

4 years ago

Which is greater the attraction of the earth for 1 kg of aluminum or aluminum or attraction of 1kg of aluminum for the earth?

OleMash [197]

Those forces are exactly equal.

Gravity always works as a pair of <em>EQUAL</em> forces ... one in each direction
between two masses. Your weight on the Earth is exactly the same as
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3 years ago

A cylinder of mass 14.0 kg rolls without slipping on a horizontal surface. At a certain instant its center of mass has a speed o

aev [14]

Answer:

a) 567J

b) 283.5J

c)850.5J

Explanation:

The expression for the translational kinetic energy is,

$E_r = \frac{1}{2} mv^2$