Why is the reflection of a wave at a free boundary different from reflection at a fixed boundary?

What principle of light's behavior can be used to make a far away object appear closer and also make a small object appear larger?

Jeremiah is riding his bicycle to the east. It takes him 10 seconds to change his velocity from 10 m/s to 15 m/s. What is Jeremiah's acceleration? 5 m/s 5 m/s/s 0.5 m/s 0.5 m/s/s

A boat has a mass of 7660 kg. Its engines generate a drive force of 4080 N due west, while the wind exerts a force of 680 N due east and the water exerts a resistive force of 1160 N due east. Take west to be the positive direction.

Two small identical conducting spheres are placed with their centers 0.32 m apart. One is given a charge of 12 ✕ 10-9 C, the other a charge of - 17 ✕ 10-9 C. (a) Find the electrostatic force exerted on one sphere by the other.

The amplitude of a mechanical wave shows What?

A set of data is collected from a simple circuit with a 20 resistor and is represented in the table

A skydiver of mass m jumps from a hot air balloon and falls a distance d before reaching a terminal velocity of magnitude v. Assume that the magnitude of the acceleration due to gravity is g. a.

8. What happens to force when mass is increased?

Give an example of ionic and covalent bond, and explain and make an example for each.

Which of these is the best reason for proper nutrition? A. To ensure that you will be skinny B. To protect yourself against certain diseases C. To improve your intelligence D. To ensure that you will get good grades