A sample of ice at 0°C has a mass of 23 g and a volume of 25 cm^3. Why does ice float on water? The density of water is 1 g.

The magnitudes of the vectors in this diagram are vx/y = 17.94 meters/second and vy/z = 3.46 meters/second. Find vx/z.

Which is the correct order of events at a power plant? Question 9 options: A) Coal burned - > Heats water - > Creates Steam - > Turns a turbine B) Turbine turns - > Heats water - > Creates Steam - > Electricity travels down the lines C) Coal burned

21. Which of the equations is balanced? A) 2Li2O + H2O ⇒ 2LiOH B) 3Fe + 3O2 ⇒ 2Fe2O3 C) 2N2 + O2 ⇒ 3N2O D) 3Mg + N2 ⇒ Mg3N2

An object weighs 39.36 newtons. What is its mass if a gravitometer indicates that g = 9.83 m/s2? 4.0 kg 386.9 kg 0.3 kg

A student throws a 140 g snowball at 6.5 m/s at the side of the schoolhouse, where it hits and sticks. What is the magnitude of the average force on the wall if the duration of the collision is 0.17 s?

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?