(ed2020)
Which best contrasts Newton’s and Einstein’s ideas?

Newton believed that mass tells objects how to move. Einstein believed that the curvature of space-time tells force how to move objects.
Newton believed that force tells mass how to move. Einstein believed that the curvature of space-time tells velocity how to change.
Newton believed that distance tells gravity how much force to exert. Einstein believed that distance tells space-time how to curve.
Newton believed that mass tells gravity how much force to exert. Einstein believed that mass tells space-time how to curve.

Follow these directions and answer the questions. 1. set up the ripple tank as in previous investigations. 2. bend the rubber tube to form a "concave mirror" and place in the ripple tank. the water level must be below the top of the hose. 3. generate a few straight pulses with the dowel and observe the reflected waves. do the waves focus (come together) upon reflection? can you locate the place where the waves meet? 4. touch the water surface where the waves converged. what happens to the reflected wave? 5. move your finger twice that distance from the hose (2f = c of c, center of the curvature) and touch the water again. does the image (the reflected wave) appear in the same location (c of c)? you may have to experiment before you find the exact location. sometimes it is hard to visualize with the ripple tank because the waves move so quickly. likewise, it is impossible to "see" light waves because they have such small wavelengths and move at the speed of light. however, both are examples of transverse waves and behave in the same way when a parallel wave fronts hit a curved surface.

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving