richardharding
01.03.2021 •
Physics
Two workers use a ramp to help lift a box onto a dock as shown below. Use the diagram below to answer the following question. Despite the advantage gained by using the ramp, there is a loss of energy mainly due to...
A. friction between the box and the ramp
B. the length of the ramp
C. The rope stretching when its pulled
D. Two people pulling the rope
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Ответ:
Most telescopes, and all large telescopes, work by using curved mirrors to gather and focus light from the night sky. ... The bigger the mirrors or lenses, the more light the telescope can gather. Light is then concentrated by the shape of the optics. That light is what we see when we look into the telescope.
Explanation: