Three people pull simultaneously on a stubborn donkey. Jack pulls directly ahead of the donkey with a force of 98.3 N98.3 N , Jill pulls with 92.7 N92.7 N in a direction 45° to the left, and Jane pulls in a direction 45° to the right with 145 N145 N . (Since the donkey is involved with such uncoordinated people, who can blame it for being stubborn?) Find the magnitude of the net force the people exert on the donkey.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

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?