In the phenomenon known as the photoelectric effect, electric current will flow when light shines on certain substances.

The coefficient of linear expansion of steel is 12 * 10-6 k-1. what is the change in length of a 25-m steel bridge span when it undergoes a temperature change of 40 k from winter to summer? a. 1.2 cm b. 1.8 cm c. 1.4 cm d. 2.0 cm e. 1.6 cm

How many hour are required to make a 3000 km trip if your average speed is 50 km/h?

If the pressure of a gas is increased then the volume will decrease because the particles of the gas will be for us closer together what is the independent variable

4. Heat is added to an ideal gas and the gas expands. In such a process the temperature

11) A model drag car is being accelerated along its track from rest by a motor with a force of 75 N, but there is a drag force of 30 N due to the track. What is the kinetic energy after 2 m of travel?

From whom should a departing VFR aircraft request radar traffic information during ground operations?

A stone is thrown at an angle of 30.0 degrees above the horizontal from the top edge of a cliff with an initial speed of 15 m/s. A stopwatch measures the stone's trajectory time from the top of the cliff to the bottom at 6.30 s.

A particular solid is electrically charged after it is rubbed, but it is not known whether its charge is positive or negative. How could you determine which charge it has by using a piece of plastic and fur?

A mass of 5 kg is moving at 5 m/s when it collides with another mass of 2 kg moving in the same direction at 2 m/s. After the collision they become bonded together. What is the final velocity of the two masses together? 2.22 m/s 6.23 m/s 3.56 m/s 4.

The process of developing a sense of identity during adolescence was highlighted by