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Problem: Your little cousin pulls a red wagon along the sidewalk a distance 12.5 m. He pulls with a force of 6.5 N with the wagon's handle at an angle of 18.8o with respect to the horizontal.
Part I: What work does he do on the wagon?
I need help to find what work he does on the wagon.
A distant galaxy is moving away from the earth with a speed that results in each wavelength received on the earth being shifted so that ??= 1.65 ?0
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