3 years ago

How many significant figures are there in the measurement (4.07×10^17m)

Physics

1 answer:

Alex17521 [72]3 years ago

6 0

Answer:

2...................

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Which of the following statements best describes the method of energy conservation known as cogeneration?

Mazyrski [523]

Answer:

heat and power

Explanation:

is the simultaneous production of electricity and heat both of which are used

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3 years ago

A car accelerates uniformly from 5m/s to 15m/s taking 7.5 seconds. How far did it travel during this period

vodomira [7]

The required answer is 66.925 m which is the distance travelled by the car.

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3 years ago

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Suppose 1.4 mol of an ideal gas is taken from a volume of 2.5 m3 to a volume of 1.0 m3 via an isothermal compression at 27°C. (a

zysi [14]

Answer:

Part a)

Q = 3198 J

Part b)

It is compression of gas so this is energy transferred to the gas

Explanation:

Part a)

Energy transfer during compression of gas is same as the work done on the gas

In isothermal process work done is given by the equation

$W = nRT ln(\frac{V_2}{V_1})$

now we know that

n = 1.4 moles

T = 27 degree C = 300 K

$V_2 = 2.5 m^3$

$V_1 = 1 m^3$

now we have

$W = (1.4)(8.31)(300)(ln\frac{2.5}{1})$

$Q = 3198 J$

Part b)

It is compression of gas so this is energy transferred to the gas

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4 years ago

1) Convert the following:<br>I) 65 kg into g<br>ii) 87570 seconds into hour<br>iii) 7.5 km into m

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Answer:

65000g

24.325 hrs

7500m

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4 years ago

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Why is it less air pressure up in the sky and why does it affect our ears

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Answer:

When you in a airplane you are in high altitude and thats where air density drops. Thats where ear pops come from.

Explanation:

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