A pulley is used to lift a heavy mass from the floor to the platform. The IMA of the system is 5 and the AMA is 2.5. What is the efficiency of the system?

If acceleration is negative does that mean it is slowing down or different direction

Which of the following can be natural sources of water pollution? a. volcanic activity b. earthquakes c. algae blooms d. all of the above

two cans on a sunny window one black and the other white construct and explanation of the effect of sun will have on both cans over a two hour period?

2. What is net force? a. The force that opposes gravity b. A force applied to an object to make it move C. The total of all forces on an object d. A force that cancels another force

Jacki's friend claims that future improvements in engine design will allow vehicles to travel any distance engineers want on just 1 L of gasoline. Is Jacki's friend correct? Why or why not?

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?

Why do we use average force while solving momentum problems? How is net force related to the momentum of the object?

If you had a positive 8 score on the sit-an-reach test you