After three half-lives, what fraction of a radioactive sample has decayed

5/6

1/2

7/8

2/3

Which is not a vector quantity? a. displacement b. velocity c. time d. acceleration

You should increase the distance between your car and the vehicle ahead when you:

Which substance is classified as a nonrenewable resource. 1. paper 2. solar energy 3. natural gas 4. water

You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, where the acceleration due to gravity is 3.71 m/s^2. The pressure at the surface of the water will be 150 kPa, and the depth of the water will be 13.

If an object has a mass of 26 g on earth, would its mass be less than 26g on the moon?

Why is it important for engineers to design bumper cars safely

What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?

Which statement describes how light behaves when it strikes a translucent material? A. Light is scattered. B. Light is transmitted. C. Light is reflected. D. Light is absorbed.

A certain gas is present in a 15.0 l cylinder at 2.0 atm pressure. if the pressure is increased to 4.0 atm the volume of the gas decreases to 7.5 l.

Choose all the answers that apply. To qualify as a planet, a celestial object must: have an irregular shape revolve around the sun orbit in a clear area have enough gravity to have a spherical shape have a satellite