What is the energy of a photon with a frequency of 2.2 * 1016 Hz? Planck's constant is 6.63 * 10-34 J•s.

If you count 20 beetles in a garden measuring 5 square meters, the population density of the beetles is

Why do scientists assume that the early universe was much hotter and denser than the universe of today?

You drive a bumper car into another bumper car whose driver has a much larger body mass that you do. Who experiences more of a jolt, you or the other driver? Explain your answer.

The driver of a car slams on her brakes to avoid collidingwith a deer crossing the highway. what happens to the car's kineticenergy as it comes to rest?

A torque of 67 Nm is needed to remove. if the radius of the screwdriver is 2 cm, what force is needed to losen the screw?

Which of the following are the top two job expectations of people who career plan? Select all that apply. A. Hours B. benefits C. type of work D. coworkers E. security

Define the term volt.

A baseball player was hit by a baseball in the left eye and complains of double vision. What should you do? A. Restrict spinal movement B. Assess pupillary response C. Perform a detailed exam D. Apply ice to orbit

An approaching storm is moving at 15 km an hour what do you need to know to determine its velocity

How did astronomers precisely determine the length of an Astronomical Unit in the 1960s?