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Answer: The given statement is false.
Explanation:
Weight :It is defined as the measure of force exerted upon the object by the gravity. It is measured in Newtons.
, where W= Weight , m = mass of the object , g = acceleration due to gravity =
Here the given statement is False, the correct statement will be:
The density of a substance is defined as its mass divided by its volume.
Answer: The staircase is 14.28 m high.
Explanation:
Given : Mass = 0.1 kg
Potential energy = 14 J
Potential energy is the energy occupied by the position of a substance. Therefore, formula for potential energy is as follows.
P.E = mgh
where,
m = mass
g = gravitational energy =
h = height of object
Substitute the values into above formula as follows.
Thus, we can conclude that the staircase is 14.28 m high.
Answer:
85.5 mmHg is the pressure of the gas sample when the valve is opened.
Explanation:
The combined gas equation is,
where,
= initial pressure of gas in container A = 165 mmHg
= final pressure of gas = ?
= initial volume of gas in container A=
= final volume of gas = 135 mL + 117 mL = 252 mL
= initial temperature of gas in container A =
= final temperature of gas =
Now put all the given values in the above equation, we get:
85.5 mmHg is the pressure of the gas sample when the valve is opened.