Why should you use sunscreen and a hat when you are out in the sun?

When an electric drill is used to bore a hole into a wooden beam, the user notices that the drill bit gets very hot. Explain why the drill bit gets hot when it is turning in the wood.

A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock. A rescue boat with speed 24.

Why is igneous rock always younger than any rock it cuts through?

I want to examine the relationship between gas mileage of cars and the engine size (displacement in cubic inches). The explanatory variable is:

Which force field can increase a moving electron's speed?

Stable system where forces cancel eachother out

A 1000-kg car is traveling north at 20.0 m/s. A 1500-kg car is traveling north at 36.0 m/s. The 1500-kg collides with the rear of the 1000 - kg car and they lock together.

9. (True or False) During an early morning rain shower, Jim could see a rainbow to the north as the sun's rays in the east broke through the clouds, illuminating the landscape.

Is sugarcane renewable or nonrenwable and why

during a crash, an airbag inflates to stop a dummys forward motion. the dummy mass is 75 kg. if the net force is on the dummy is 825 N toward the rear of the car, what is the dumys deceleration