Physics, 12.08.2020 04:01 rafexRaex2914

a rock with mass of 5kg is carried up a small hill 10 meters high. how much work had to be done in carrying the rock up hill

Answers: 3

Show answers

Another question on Physics

Physics, 21.06.2019 15:10

On a cold day, when the air temperature is 0°c, you empty your lungs and take a deep breath, filling your lungs with 4.2 l of air. if you hold your breath until the temperature of the air in your lungs reaches 37°c, what is the volume of the air in your lungs at that point, assuming the pressure does not change?

Answers: 1

Answer

Physics, 22.06.2019 00:30

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

Answers: 2

Answer

Physics, 22.06.2019 13:40

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

Answers: 2

Answer

Physics, 22.06.2019 15:30

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

Answers: 1

Answer

You know the right answer?

a rock with mass of 5kg is carried up a small hill 10 meters high. how much work had to be done in c...

Questions