Scientists often use models to study the movement of continents. Why might scientists use a model to show this movement?
A. Extremely complex movement is not easily observed directly.
B. Extremely fast movement is not easily observed directly.
C. Extremely dangerous movement is not easily observed directly.
D. Extremely slow movement is not easily observed directly.
SUBMIT

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?

A75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is to be replaced by a high-efficiency motor that has an efficiency of 95.4 percent. the motor operates 4368 hours a year at a load factor of 0.75. taking the cost of electricity to be $0.12/kwh, determine the amount of energy and money saved as a result of installing the high-efficiency motor instead of the standard motor. also, determine the simple payback period if the pu

What is the momentum of 70 kg runner traveling at 10 m/s?