Amaglev train can “float” because magnets in the bottom of the train and on the a. have like poles that attract each other b. have unlike poles that repel each other c. have like poles that repel each other

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

A3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular? a 3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular?

The least penetrating form of radiation is