An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 20L. The height of water ro
1 answer:
Answer:
2.45 g/mL
Explanation:
(assuming that the original volume was 20 mL and not L)
Since you know the amount of water in the cylinder before and after you placed the rock in, you can subtract them to get the volume of the rock itself. mL.
To get the rock's density, use the equation , where m is mass and v is volume.
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Answer:
v₂ = 5.7 m/s
Explanation:
We will apply the law of conservation of momentum here:
where,
Total Initial Momentum = 340 kg.m/s
m₁ = mass of bike
v₁ = final speed of bike = 0 m/s
m₂ = mass of Sheila = 60 kg
v₂ = final speed of Sheila = ?
Therefore,
<u>v₂ = 5.7 m/s </u>
Answer:
Heat transfer during the process = 0
Work done during the process = - 371.87 KJ
Explanation:
Initial pressure = 0.02 bar
Initial temperature = 200 K
Final pressure = 0.14 bar
Gas constant for helium R = 2.077
This is an isentropic polytropic process so temperature - pressure relationship is given by the following formula,
=
Put all the values in above formula we get,
⇒ =
⇒ = 1.74
⇒ = 348.72 K
This is the final temperature of helium.
For isentropic polytropic process heat transfer to the system is zero.
⇒ ΔQ = 0
Work done W = m × ( -
) ×
⇒ W = 1 × ( 200 - 348.72 ) ×
⇒ W = 371.87 KJ
This is the work done in this process. here negative sign shows that work is done on the gas in the compression of gas.