The mass of an electron is 9.11

*

*

10

-31

-31

kg.

1)

How far apart would two electrons have to be in order for the electric force exerted by each on the other to be equal to the weight of an electron? (Express your answer to three significant figures.)

The frequency of the fundamental of the guitar string is 320 Hz. At what speed v do waves move along that string?. Wavelength = 40cm

A landfill in Minnesota receives an average of 50 cm of rainfall per year. Sixty percent of the water runs off the landfill. The landfill has a surface area of 5000 m2. The leachate from the landfill is treated for cadmium and other toxic metals.

Tim is experimenting with salts dissolving in water. He thinks that all salts will become more soluble as the temperature increases.

A 95 N force exerted at the end of a 0.50 m long torque wrench gives rise to a torque of 15 Nm. What is the angel (assumed to be less than 90 degrees) between the wrench handle and the direction the force is applied?

Consider two copper wires. One has twice the length and twice the cross-sectional area of the other. How do the resistances of these two wires compare? A) Both wires have the same resistance.

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.