How far away is a cliff if an echo is heard 0.486 s after the original sound? Assume that sound traveled at 343 m/s on that day.

How much energy is contained in the mass of a 60-kilogram person?

Under constant acceleration the average velocity of a particle is half the sum of its initial and final velocities. Is this still true if the acceleration is not constant? Explain.

Felix has three metal bowls that are the same shape and size. Felix fills each bowl to the top with boiling water. The first bowl holds 2.5 liters, the second bowl holds 1.0 liter, and the third bowl holds 0.75 liters.

In which of the following eons did a significant amount of oxygen gas exist in Earth's atmosphere? a| Hadean b| Archean c| Proterozoic d| No answer text provided.

What effect does an energy change have on the identity of a substance?

Rotation of the lever OA is controlled by the motion of the contacting circular disk of radius r = 300 mm whose center is given a horizontal velocity v = 1.64 m/s.

An ideal solenoid of length L, N windings, and radius b (L is much longer than b). A current I is flowing through the wire windings.

Determine the magnitude of the electric field at the surface of a lead-196 nucleus, which contains 82 protons and 114 neutrons. Assume the lead nucleus has a volume 196 times that of one proton and consider a proton to be a sphere of radius 1.

The convex len called converging lens

The emf produced in a generator is Vemf = 25 sin 377t. What is the frequency of rotation of the circular coil? 50 Hz 60 Hz 25 Hz 15 HZ