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.

A pressure of 2.5 atm is equivalent to a. 41 kPa. b. 1900 mm Hg. c. 3.0 * 102 mm Hg. d. 2.5 kPa.

A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (-2.5 m/s) ˆ. The acceleration is given by ~a = (4.5 m/s 2) ˆı + (3 m/s 2) ˆ.

Describe two differences between Mendeleev's periodic table and the modern periodic table

If one object has a large redshift and another object has a small redshift, what can we conclude about these two objects? a. The one with the large redshift is moving toward us faster than the one with the small redshift. b.

The magnetic field of a solenoid depends upon n, which represents select one: a. the number of current-carrying wires. b. the number of loops. c. the number of loops per unit length. d. a constant known as newtons magnetic constant.

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?