Why does convection occur only in fluids?

A 2.4 mm - diameter copper wire carries a 37 A current (uniform across its cross section). Determine the magnetic field at the surface of the wire. Express your answer using two significant figures

An electron moves with a speed of 8.0 * 10^{6} m/s along the + x-axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of 60° to the + x-axis and lying in the xy-plane.

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

Two students below described a part of Earth's innermost layer: Daniel: Densest part Joshua: Has highest temperature and pressure Which part of the innermost layer did Daniel and Joshua describe? A. They both described the outer part. B.

A wavelength of light is 2,000 m. What is the frequency?

What will not result in acceleration

Magma from a volcano is considered a fluid because it can flow and it exhibits viscosity true or false

If you lift the front wheel of a poorly maintained bicycle off the ground and then start it spinning at 0.69 rev/s, friction in the bearings causes the wheel to stop in just 13 s. If the moment of inertia of the wheel about its axle is 0.

Why is it warmer near the equator than near the poles?

Does 59feet = 170000 meters