A10 n horizontal force is applied to a 50 n block initially at rest on a rough horizontal surface. the box will not move in this situation. to start it moving, a second person pulls vertically upward on the box. if the coefficient of static friction is 0.5, what is the smallest vertical force for which the box will move?

33: i think it’s b

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray