The input work done on a pulley system is 450J. What is the efficiency of the pulley system if the output work is 375J

What is the best way to ensure that the results of your experiment are accurate?

Describe how mass and distance affect gravitational force.

Identify the number of protons, neutrons, and electrons in a natural atomof a given element.

What are the physics terms behind watching TV?

Each student aligns the edge of the object with the left edge of the ruler as shown above. All four students read the ruler with a measurement of 4.6 cm.

How would life on earth be different if earth's axis were not tilted with respect to its orbit? A. There would be no seasons. B. There would be no day and night. C. All places would have the same climate. D. The seasons would be much shorter.

What will a spring scale read for the weight of a 75.0-kg woman in an elevator that moves upward with constant speed of 5.8 m/s?

What's the definition of: • cellular respiration • photosynthesis

What are the steps that are important to take for your safety during an earthquake? a. stay away from walls and windows c. stay away from electrical and gas lines b. get under a desk or table d. all of the above

You have an open air column of length 1.40 m in air at 24.2 °C. What is the frequency of the third harmonic?