This equation indicates that the reaction gives off heat. What is this type of reaction called?

C3H8 + ? O2 → 3CO2 + 4H2O + heat

A.

synthesis reaction

B.

decomposition reaction

C.

endothermic reaction

D.

exothermic reaction

An emf is induced by rotating a - turn, diameter coil in the Earth's magnetic field. What average emf is induced, given the plane of the coil is originally perpendicular to the Earth's field and is rotated to be parallel to the field in

A girl of mass 55 kg throws a ball of mass 0.80 kg against a wall. The ball strikes the wall horizontally with a speed of 25 m/s and it bounces back with this same speed. The ball is in contact with the wall 0.050 s.

What is the scientific rule that states that energy cannot be created or destroyed?

A young boy was riding his bicycle down the street when he hit a parked car. what was the second collision?

You come across an open container that is filled with two liquids. Since the two liquids have different densities, there is a distinct separation between them. Water, which has a density of rhow=1.

What is 1/3 of 300

What geologic features might form at the surface of plate A?

Is it true that mollusks that live in water have lungs

Which is a true statement about waves? A They always travel in every direction at the same time. B. They travel at different speeds through different materials. c. They cannot travel through liquids or solids. D.

What is s the best description of the constructive interference of light? A. two waves have the same direction of displacement. B. two waves have displacement in opposite directions. C. a longitudinal wave meets a transverse light wave D.