A 4 kg mass is in free fall. What is the velocity of the mass after 11 seconds

Which of the following correctly describes the Big Bang theory? The entire universe was formed in a massive explosion that threw all the material that makes up the universe out in all directions at a great speed.

What is the velocity of a wave that has a frequency of 25 Hz and a wavelength of 7.79 m?

If only one external force acts on a particle, does it necessarily change the particle's kinetic energy and velocity? (select all that apply.)

Tommy was walking at a rate of 4 miles per hour at noon and at 12:30 pm he was walking at a brisk rate of 6 miles per hour. Two hours later tommy was walking at a leisurely rate of 2 miles per hour.

Which of the following can be construed after a model verifies the results of multiple experiments? a.) a theory that does not explain what happens. b.) a law that describes what happens. c.) a law that explains what happens and why. d.

Two identical capacitors are arranged in a circuit. What is the ratio of the equivalent capacitance of the circuit when the capacitors are in series to that when they are in parallel?

A car's position in relation to time is plotted on the graph. What is the car's average velocity for segment C? A) - 4 m/s B) - 0.25 m/s C) 0.25 m/s D) 4 m/s

What percent of my Iodine-131 sample will be left after 7 half-lives?

A 58.0 kg snow skier is on the top of 351 m high hill. After she has gone down a vertical distance of 142 m, what is her mechanical energy? Explain your answer (CER) !

A sphere has a mass of 2.10kg and travels along a horizontal plane at the velocity of 12.2m/s. Find the energy