3. A carpenter uses a crowbar to remove the top of a box. The top has a resistance of 500 N. The

carpenter applies an input force of 250 N. What is the mechanical advantage of the crowbar?

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When water boils in a pan on a hot burner, heat gets to the water mainly by Question 3 options: conduction of heat through the pan. reflection of heat from the burner. radiation of heat through the pan. absorption of heat from the air in the room.

A ship is 130 m away from the center of a barrier that measures 180 m from end to end. What is the minimum angle that the boat must be turned to avoid hitting the barrier? (34.7o)

how much time would it take for the sound of a thunder to travel 1,500 meters if sound travelers at a speed of 330 m/sec?

A car goes 4 m/s for 10 seconds then speeds up to 12 m/s in two seconds. The car continues at this speed for a minute. The car then accelerates at - 3 m/s" for 10 seconds How far did the car go in each time interval?

What important factor does the ozone layer serve in earth's atmosphere?

Difference between Heterozygous and homozygous?

A wave has a speed of 50 m/s and a frequency of 10 Hz. Calculate its wavelength.

A conservative force acts on a particle. We can conclude: A. The work done by the force on the particle depends only on initial and final position. B. The force must be constant. C. The particle cannot change direction. D.

Which action is caused by gravity? a frost wedging b aeolian bands c mass wasting d glaciation

A light beam is directed parallel to the axis of a hollow cylindrical tube. When the tube contains only air, the light takes 8.72 ns to travel the length of the tube, but when the tube is filled with a transparent jelly, the light takes 1.