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.

How many gallons are in a cubic gallon?

A fan blade rotates with angular velocity given by ωz (t) = γ - β t2. part a calculate the angular acceleration as a function of time. express your answer in terms of the variables β, γ, and t. αz (t) = submitmy answersgive up part b if γ = 5.

The force produced by gravity on a mass is called

Rocío strikes a 0.058-kg golf ball with a force of 272N and gives it a velocity of 62.0m/s. How long was Ricío club in contact with the ball?

A backyard swimming pool holds 165 cubic yards (yd3) of water. what is the weight of the water in pounds?

Which of the following water samples would be considered acidic

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.

Let y'=4 x. find all values of r such that y = rx^{2} satisfies the differential equation. if there is more than one correct answer, enter your answers as a comma separated list.

What are the starting materials for nuclear fission

Why is it possible to throw a 0.145 kg baseball much further than a 7 kg bowling ball?