If a rock has a density of 2g/cm³ and a volume of 8cm³, what is its mass?

A. 4 g

B. 128 g

C. 16 g

D. 0.25 g

Chris had a tin of 24 cookies he has eaten 1/4 of the cookies how many cookies has he eaten

In the formula 4h²o how many total hydrogen atoms are there

A cathode ray tube is made of glass with a small amount of some kind of gas in it. It has metal electrodes at each end to pick up an electric current.

A charge of + 3.0 mC is distributed uniformly along the circumference of a circle with a radius of 20 cm. How much external energy is required to bring a charge of 25mC from infinity to the center of the circle?

A cart on an air track is moving at 0.5 m/s when the air is suddenly turned off. the cart comes to rest after traveling 1 m. the experiment is repeated, but now the cart is moving at 1 m/s when the air is turned off.

Two copper wires with different diameters are joined end to end. If a current flows in the wire combination, what happens to electrons when they move from the larger-diameter wire into the smaller-diameter wire?

A baseball player is warming up and tosses a ball straight up into the air. The ball travels up until it reaches some maximum height, and then falls back down to the player/'s hand.

Volume can be measured in liters or cubic meters. a. T b. F

A spring with a spring constant of 1200 N/m has a 55-g ball at its end. The energy of the system is 5.5J. What is the amplitude of vibration?

Force F1 acts on a particle and does work W1. Force F2 acts simultaneously on the particle and does work W2. The speed of the particle does not change. Which one of the following must be true? a. W1 is zero, and W2 is positiveb. W1 = - W2c.