A boy slides a book across the floor, using a force of 5 N over a distance of 2

m. What is the kinetic energy of the book after he slides it? Assume there is

no friction

O A. 20 j

O B. 2.5 j

O c. 5 j

O D. 10 j

We know velocity of sound v=a₩ (omega), but speed does not depend on amplitude, why?

What separates Mars from Jupiter? sun Milky Way Galaxy asteroid belt black hole

Gamma-ray bursters emit pulses of gamma rays with high energies. The frequency of the most energetic pulses has been measured at around 3.0 x 1021 Hz. What is the wavelength of these gamma rays?

Which of the following is likely to have the lowest viscosity? hot oil room temperature oil room temperature water below room temperature oil Hot oil Room temperature oil Room temperature water Below room temperature oil

Assume you are a perfect blackbody at a temperature of T = 310 K. What is the rate, in watts, at which you radiate energy? (For the purposes of this problem, you may assume you are spherical with a mass of 70 kg and density equal to that of water)

A starship passes Earth at 80% of the speed of light and sends a drone ship forward at half the speed of light rela - tive to itself. Show that the drone travels at 93% of the speed of light relative to Earth.

Rubies are used in electronics

Two kids are on a merry-go-round that is turning at a constant rate. ariel is near the outer edge, and bob is closer to the center. ariel has answer (smaller, the same, or greater angular speed?

Visit this website and locate the element mercury, whose chemical symbol is Hg. Click on the square to read about the history, properties, and uses of mercury. Name three uses for mercury.

Ten seconds after starting from rest, a car is moving at 40 m/s. what is the car's acceleration in meters per second per second?