The number of times that a wave vibrates in a unit of time is called

A. amplitude

B. frequency

C. wavelength

D. interference ... ?

Which of the following materials would generate the strongest magnetic field if used as the core? A. silicon B. plastic C. carbon D. iron

1. A drop of oil of volume 10-10 m spreads out on water to make a circular film of radius 10 m. what is the thickness of the film?

Which field (s) are created by an electron when it moves? A. electric and gravitational fields B. magnetic and gravitational fields C. gravitational, electric, and magnetic fields D. electric field only

the arm of a crane is 15.0 m long and makes an angle of 70.0 degrees with the horizontal. Assume that the maximum load for the crane is limited by the amount of torque the load produce around the base of the arm.

What are some technologies used by designers of prosthetic legs to improve their designs?

The force of attraction between two oppositely charged pith balls is 5.3 * 10-6 newtons. If the charge on the two objects is 6.7 * 10-9 coulombs, what is the distance between the two charges? (k = 9.0 * 109 newton·meter2/coulombs2)

To describe velocity you need to know?

Mohammed made a chart to list examples and nonexamples of projectile motion. Which best completes the chart? a - a football thrown in the airb - a kite flying on a stringc - a golf ball rolling off a table d - water spraying from a fountain

Halley's Comet appears around the sun about once every 76 years. It passes through the part of its orbit nearest the sun in just a few months but then moves out to great distances and takes more than half a century for the rest of its orbit.

In order to hike around a portion of Lake Allatoona, a tour guide determines that he must take his group 150 m east, 60 m north, then 75 m west.