What are the two types of simple machines in a corkscrew

A hydrogen atom contains a single electron that moves in a circular orbit about a single proton. Assume the proton is stationary, and the electron has a speed of 7.5 105 m/s.

When must scientific theories be changed? A. When one experiment shows a surprising result. B. When a new government is elected. C. When an old scientist dies D. When new evidence is discovered

What happens when two atoms collide?

Alpha Particle consists of 2 protons and 2 neutrons. What is the number of electrons?

When you swim in a pool, Select one: a. rolling friction occurs. b. fluid friction occurs. c. sliding friction occurs. d. static friction occurs.

Hich of the following needs is an addition to Maslow's original hierarchy and only appears in the eight-stage revised model

What color of light can plants "see"?

Two tiny beads are 25 cm apart with no other charges or fields present. Bead A carries 10 µC of charge and bead B carries 1 µC. Which one of the following statements is true about the magnitudes of the electric forces on these beads

A ball is thrown straight up at 20 m. What is the balls velocity as it hits the ground?

Block 1 and Block 2 have the same mass, m, and are released from the top of two inclined planes of the same height making 30 degree and 60 degree angles with the horizontal direction, respectively.