A motorist makes a trip of 180 miles. For the first 90 mph she drives at a constant speed of 30 mph. What constant speed must she drives the remaining distance if her average speed for the total trip is to be 40 mph

a circuit element having terminals a and b has vab = 10v and iba = 2a over a period of 20s, how much charge moves throught the element

A rocket travels from the moon to earth, describe how its weight changes during the journey. why is it important that the rocket has as little mass as possible

Positively charged ions are surrounded by freely moving electrons in

A grinding wheel, initially at rest, is rotated with constant angular acceleration of 7.36 rad/s 2 for 5.73 s. The wheel is then brought to rest with uniform deceleration in 8.37 rev. Find the angular acceleration required to bring the wheel to rest.

It takes 180 kj of work to accelerate a car from 21.0 m/s to 27.0 m/s. what is the car's mass?

What happens to the resistance of a filament if it is replaced by a shorter wire?

One group of scientists feel that global warming affects the frequency of hurricanes. Another group of scientists believe that global warming does not affect the frequency of hurricanes, but it makes the average hurricane stronger.

In an experiment, all participants receive a treatment but those in the control group recieves a false treatments

When the volume increased, what happened to the density?

8. Chemical weathering occurs more rapidly in what kind of climates? A. Desertlike B. Cold with high snowfall amounts C. Cool and dry D. Warm with abundant rainfall