The frequency of a wave is 4.28 · 1020 Hz. How much energy does this wave have? Be sure to show your work!

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

What is the force of an object when it landed(sitting in the ground)