- 20 m(width) 15 m(length)
A swimming pool has the dimensions shown in the drawing.
It is filled with water to a uniform depth of 8.00 m.
The density of water = 1.00 10 kg/m².
What is the total pressure exerted on the bottom of the
swimming pool?

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c

The energy equivalent of the rest mass of an electron is

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?