Answer:
we can see that this time period is independent of the mass of the child so answer would be same if the child mass is different
Explanation:
Natural frequency of a simple pendulum of L length is given as
so the time period of the oscillation is given as
so we will have
also from above formula we can see that this time period is independent of the mass of the child so answer would be same if the child mass is different
Answer:
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Explanation:
The gravitational force of the earth keeps us bound to the earth. Gravitational force between earth and sun makes the earth move around the sun. Gravitational force between moon and earth makes the moon go around the earth.
Answer:
-2000 J (heat lost)
Explanation:
We can solve the problem by using the 1st law of thermodynamics:
where
is the change in internal energy of a system
Q is the heat absorbed by the system
W is the work done by the system
In this situation, we have
(work done by the student)
(decrease in internal energy)
So the heat is
And the negative sign means the student has lost heat.
Answer:
4°C
Explanation:
Water is densest at 4°C. Since dense water sinks, the bottom of the lake will be 4°C.
Answer:
The substance in is at state of gas.
Explanation:
Please see attavhed document
