Name and describe the phase change that occurs when dry ice is placed in an open container at room temperature.

Thick fuild in sinuses

A piece of electronic equipment that is surrounded by packing material is dropped so that it hits the ground with a speed of 6.5 m/s.

What causes interstellar dust and gas to start to contract and form a protostar? 1) the shockwave from a supernova 2) nearby black hole 3) an increase in the solar wind 4) nuclear fusion

Beryllium, magnesium and calcium all are located in the alkaline earth group. Which of these characteristics do these elements have in common?

The strength of the electric field 0.5 m from a 6 uC charge is NIC. (Use k = 8.99 x 10°N. m and round answer to the nearest whole number.)

1. A 0.828-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. a) Find the momentum of the electron. b) Find the kinetic energy of the electron.

When are you most aware of your motion in a moving vehicle: when it is moving steadily in a straight line or when it is accelerating?

The force of gravity on a person or object on the surface of a planet is called?

What happens to the particles of the liquid inside a thermometer when the thermometer is heated? They slow down and spread apart. They speed up and spread apart. They slow down and move closer together. They speed up and move closer together.

You did 150 joules of work lifting a 120 - N backpack. how high did you lift the backpack? how much did the backpack weigh in pounds