The object distance for a convex lens is 20.0 cm and the image distance is 4.0 cm. the height of the object is 10.0 cm. what is the height of the image? 50.0 cm 8.0 cm 2.0 cm 0.50 cm

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.

An ascending elevator, hanging from a cable, is coming to a stop. part a part complete identify all forces acting on the elevator from the list below. select all that apply. select all that apply. kinetic friction normal force tension weight static friction submitprevious answers correct part b draw a free-body diagram of the object. draw the vectors starting at the black dot. the location and orientation of the vectors will be graded. the exact length of your vectors will not be graded but the relative length of one to the other will be graded.