Physics, 24.11.2020 17:30 ultimatesaiyan

Why are many adults and youth in the United states overweight?

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How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

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Physics, 21.06.2019 22:30, dyamondgeorge1oy4nex

During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?

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Physics, 22.06.2019 12:50, natalyarenassalgado

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i. e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i. e. include the distance traveled to the first encounter)