Aball of mass 0.35 kg hangs straight down on a string of length 13 cm. it is then swung upward, keeping the string taut, until the string makes an angle of 70° with respect to the vertical. find the change in the gravitational potential energy of the earth-ball system.

PE=0.29J

Explanation:

According to the description, there is a angle and in point swung upward of 70°

So,

Appling the equation of Potential Energy we have,

i would think it's food chain

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas