A material that freely accepts the flow of electrons is called

Name two characteristics of the elements in the first group of the periodic table.

Walter and John leave in their cars at the same time. Walter drives 252 miles. John drives 10 miles per hour faster than Walter and travels 312 miles.

A train travels 90 kilometers in 1 hour, and then 82 kilometers in 5 hours. What is it's average speed?

A 8.3 resistor and a 5.4 resistor are connected in series with an emf source. The potential difference across the 5.4 resistor is measured with a voltmeter to be 12 V. Find the potential difference across the emf source.

A 300 g glass thermometer initially at 20 ◦C is put into 297 cm3 of hot water at 83 ◦C. Find the final temperature of the thermometer, assuming no heat flows to the surroundings. The specific heat of glass is 0.

Identify the conditions for an elastic collision in a closed system. Check all that apply. Energy is conserved. Velocities may change. Momentum is conserved. Kinetic energy is conserved. Objects stick together after the elastic collision.

When the velocity of a mass on a spring is zero, the acceleration is at

Which is a disadvantage of using wind as an energy source? Check all that apply. It may be unreliable. It is not naturally occurring. It produces a lot of waste. It requires wires to carry electricity. It generates large amounts of electricity.

One step in the production of hydroelectric power involves

A pot is heated on a stove. The water begins to boil rabidly. Which explains why the water is boiling fast?