Before an ozone layer formed to reduce radiation, life existed

a. in the air.

c. in oceans and underground.

b. in trees and plants.

d. on land.

Which of the following is a characteristic of a mixture? A. It has varying properties. B. It has a fixed composition. C. It only contains pure substances. D. It has both varying properties and a fixed composition?

Use this formula to solve this problem: Power (P) = Work (W) : time (t) Peter's body supplies a force of 500 N to run up a 5 meter hill in 10 seconds. How much power is involved in Peter's run up the hill?

When a pendulum is at the center position, what is true of the kinetic and potential energy?

When the man raises both his arms, from hanging down to straight up, by how much does he raise his center of mass?

The windshield of a car has a total length of arm and blade of 9 inches, and rotates back and forth through an angle of 93degrees. What is the area of the portion of the windshield cleaned by the 7 -in wiper blade?

The planet XYZ traveling about the star ABC in a circular orbit takes 24 hours to make an orbit. Assume that the orbit is a circle with radius 89 comma 000 comma 00089,000,000 mi. Find the linear speed of XYZ in miles per hour.

Your heart pumps 80 g of blood with each beat. The blood starts from rest and reaches a speed of 0.60 m/s in the aorta. If each beat takes 0.16 s, the average force exerted on the blood is a. 3.0" 102 N b. 0.22 N c. 0.16 N d. 0.30 N e. 0.98 N

What is the formula for calculating the mass when i have the number of volume and density

What is the name for potential difference that causes current to flow? (A) electric charge (B) static discharge (C) voltage

How is a herpetologist and a ecologist similar