Answer: 200 N/m
Explanation:
The Gravitational spring energy(Us) is equal to 1/2kx^2. So we have x as .2 m and Us as 4 N. So 4 N = 1/2 * k * .2^2. So now we solve for K and get 200 N/m.
Heat makes things expand, so in hot water the ballon will get bigger
The maximum efficiency is 10%
Explanation:
The maximum efficiency of a machine is given by:
where
is the temperature of the hot reservoir
is the temperature of the cold reservoir
For the machine in this problem, we have:
is the temperature of the hot reservoir
is the temperature of the cold reservoir
substituting, we find the max efficiency:
So, the efficiency is 0.10 (10%).
Learn more about temperature:
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Explanation:
<h3>Electricity is defined as the rate of flow of charges in a conductor.</h3>
<h2>hope it helps.</h2><h2>stay safe healthy and happy...</h2>