A balloon contains 30.0 l of helium gas at 103 kpa.

When a siren is approaching you, how does the wavelength of the waves reaching you compare to the actual wavelength that the siren emits?

What type of heat transfer occurs when particles bump into each other? A. Convection B. Insulation C. Thermal Conduction D. Thermal Radiation

Two elements share very similar chemical properties. You would expect them • to be in the same row of the periodic table • to be on opposite sides of the periodic table • to be diagonal from each other in the periodic table • to be in the same

Is the mass per unit volume of a material. a) volume b) size c) weight d) density

When you drop a rock from a cliff, which of the following happens? Only the rock falls to the Earth Only the Earth falls up to meet the rock The rock and the Earth fall towards each other None of the above

A dc generator is the same as a (n) a. electric motor. b. ac generator. c. armature. d. electric current.

Which of the following best describes scientific knowledge A.) Durable B.) Absolute and never changing C.) Frequently varies

Beth made the chart shown. A 2-column table with 1 row. The first column labeled X has entries Wall clock, T V remote control, Portable music player. The second column labeled Y has entries Refrigerator, Table lamp, Hair dryer.

Which sentence states Newton's third law? If two objects collide, each object exerts a force in the same direction as the other. If two objects collide, each object exerts a force equal to and in the opposite direction of the other.

Why did the chicken cross the road.