What type of waves are gramma rays, visible light, and ultraviolet rays?

a. electromagnetic and pressure/longitudinal
b. mechanical and transverse
c. electromagnetic and transverse
d. mechanical and pressure/longitudinal

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.

A15 ohm resistor and a 25 ohm resistor are connected in parallel to a 60 volt battery. what is the power used by each device

2) a cubical block of stone is lowered at a steady rate into the ocean by a crane, always keeping the top and bottom faces horizontal. which one of the following graphs best describes the buoyant force b on this block as a function of time t if the block just enters the water at time t = 0 s?