A 2.0 kg brick has the dimensions 7.5 cm X 25 cm X 15 cmx 30 cm. find the pressure exerted by the brick on a table when it is resting on its various faces.

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Ten students stand in a circle and are told to make a transverse wave. what best describes the motion of the students? each student bumps the shoulder of his or her neighbor. at the exact time, all students take a step to the right. the students skip clockwise, going in a circular motion. one at a time, each student lifts his or her hands up and then down.

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles

Which accurately compares concave and convex lenses?