An ion with a charge of 3.2 x 10-19 C is in region where a uniform electric field of 5 x 104 V/m is perpendicular to a uniform magnetic field of 0.8 T. If its acceleration is zero then its speed must be:

If a spring has a k value of 100 newtons per meter and it is stretched 0.50 meters, what is the restoring force of the spring?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.