A 100 kg roller coaster car is located at the top of a hill where the height is 20 m. What is the velocity when it reaches the bottom of the hill? 5.5 m/s 11.2 m/s 16.7 m/s 19.8 m/s

A 0.3-kg ball has the velocity of 20 m/s. what is the kinetic energy of the ball?

An elevator filled with passengers has a mass of 1683 kg. (a) The elevator accelerates upward from rest at a rate of 1.20 m/s2 for 2.75 s. Calculate the tension in the cable (in N) supporting the elevator. g

Facts about sunspots

A harmonic wave is traveling along a rope. the oscillator that generates the wave completes 46.0 vibrations in 26.0 s. a given crest of the wave travels 415 cm along the rope in a time period of 11.7 s. what is the wavelength? answer in units of m.

Explain how a volcanologist can piece together the history of a volcano by studying the rock that makes up the volcano

There is a flashing yellow light at the intersection you are approaching. What does the flashing yellow light indicate, and what should you do to safely navigate this intersection?

Rachel is making cookies. She pours 1/2 cup of oil into a bowl, followed by 1 cup of water. The oil rises to the surface of the bowl. Why?

Fluids can flow and change shape to fit their containers. Which two states are fluids?

Is jacob barnes a turd face?

A system absorbs 12 j of heat from the surroundings; meanwhile, 28 j of work is done by the system. what is the change of the internal energy δeth of the system?'