If a light ray from a candle strikes a mirror at an angle of 40° with the normal, at what angle will the ray reflect?

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A. 20°

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B.

25°

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A motor has the electrical energy equivalent to 400. joules of work. It can lift a 5.0 kg mass 2.0 meters. Calculate the work done by the motor.

A plane is heading south with a velocity of 150 kilometers/hour. It experiences a tailwind with a velocity of 20 kilometers/hour. Find the resultant velocity of the plane.

If you perform 40 joules of work lifting a 10-N box from the floor to a shelf, how high is the shelf?

Describe the main distinguishing features of spiral, elliptical, and irregular galaxies.

Mengapa indra peraba tidak dapat digunakan untuk membandingkan suhu dengan tepat?

A bathroom scale is compressed 0.21 in. when a 210 -lb person stands on it. Assuming that the scale behaves like a spring that obeys Hooke's law, how much does someone who compresses the scale 0.06 in.

Explain what happens when a ferromagnetic material is made into a permanent magnet.

You are drawing a branching diagram to show the relationship between Turtles frogs and alligators which two organisms does the diagram indicateas having the most recent common ancestor

Estimate the length of the neptunian year using the fact that the earth is 1.50Ã108km from the sun on average.

Identify one type of electromagnetic energy that has a shorter wave length than green light