B Which of the following will exert the greatest pressure when standing on the ground?
A an elephant: weight 50 000 N, area of one foot 0.2 m2
B atmospheric pressure: 105 Pa
C ballerina: weight 450 N, on one point, area 0.0015 m2
D man: weight 800 N, area of one foot 0.025 m2

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.

How much energy will be transferred to your eardrum while listening to this sound for 1.0 min?