Wave that require a medium through which to travel or called electric magnetic waves?

If you were trying to build a soundproof room, which of the following materials would you choose in order to absorb the most sound, based on the coefficient of absorption for each material? A. Wood B. Carpet C. Heavy curtains D. Concrete

How do the areas of sunlight in the two hemisphere change over the year?

3. Applying Concepts Explain why a canoe that has hollow, water- tight compartments on its ends won't sink, even if it is capsized.

Which of the following is not a part of photosynthesis? nitrogen oxygen water All of the above are important parts of photosynthesis

Which statement best describes the orientation of a magnetic field around a circuit when a capacitor is used? Capacitors prevent current from moving through a circuit. Magnetic fields reverse when a capacitor charges or discharges.

given that a car's distance from a stop sign t seconds since it started moving is represented by d=t2-2t determine the car's average speed over each interval of elapsed time

A ball hits a wall. What is true about the magnitude of the force experienced by the ball compared with the force experienced by the wall? OA. The ball experiences more force than the wall. OB. The ball experiences less force than the wall.

A swimmer jumps from a waterfall thats is 8.5 m high from the lake below. How fast must he run horizontally to dive 2.5m away from the base of the waterfall?

What happens (as far as energy goes) when a molecule of gas strikes the wall of a container?

The boom of a fire truck raises a fireman (and his equipment - total weight 280 lbf) 60 ft into the air to fight a building fire.