Which statement CORRECTLY describes the energy transformation as the pendulum swings from point A to point B? A

The kinetic energy of the pendulum is highest when the washer is at point A and decreases to a minimum at point B.

B

The potential energy of the pendulum is highest when the washer is at point A and decreases to a minimum at point B.

C

The kinetic energy of the pendulum remains the same as it moves between the two points labeled A.

D

The potential energy of the pendulum remains the same as it moves between the two points labeled A.

Carbon 14 is a naturally occurring stable

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)