A person wearing a seatbelt can survive a car crash if the acceleration is smaller than 30 gees assuming constant negative acceleration how much most the car is front and collapse if it crashes into a brick wall at 60 mph in the occupants are to survive

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.

Dc versus ac problem. suppose your dc power supply is set to 15 v and the vertical setting on the oscilloscope is at 5 v/div. how many divisions will the trace deflect if you connect the output of the power supply to the scope with the a input switch set on dc? how many divisions if the switch is on ac?