What must happen for an electromagnet to have a magnele field? A. It must be heated.
B. It has to be touching another magnet.
c. It must be connected to an electrical source.
D
It must be lined up with Earth's magnetic field.

The particles of an ice cube at 0°c (represented by the blue circles) come in contact with the particles of juan’s hand at 37°c (represented by the orange circles). which diagram correctly represents the temperature of the two substances and the direction of heat flow?

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply