An industrial physicist wishes to specify the properties of a concave makeup mirror, which is supposed to provide an upright and enlarged image of the user's face. the physicist wants a magnification factor of two, and he assumes that the user's face will be 28 cm in front of the mirror. what radius of curvature should be specified (in cm) for the fabrication of these mirrors?

When an object is heated it contracts. a. true b. false

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?

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt