___ rays are used to stuffy hot stars? ___ rays can detects the presence of interstellar gas clouds?

What is radiation?

___ rays show areas where large quantities of energy are released?

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Energy is the ability to do work which measures what

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.