Which statement is true about alkali metals? A. Some of them explode when exposed to water. B. They are in group 18 of the periodic table. C. They are not conductors of heat or electricity. D. They are not very reactive.

before colliding, the momentum of block A is + 25.0 kg*m/s, and block b is + 35.0 kg*m/s. after, block a has a momentum + 60.0 kg*m/s. what is the momentum of block b afterwards?

Zoe went on a fishing trip. On the first day she caught 9 catfish and 6 trout. On second caught 17 catfish and 13 trought. On which day of the fishing trip did zoe catch a lower ratio of catfish to trout?

Which shows a decrease in fluid pressure? A. A fan is turned from high speed to low speed. B. Oxygen is compressed as it is put into a pressurized tank. C. Water in a creek slows down as it enters a slow-moving river. D.

Which is a major threat to biodiversity? A. Red-billed oxpeckers eat ticks off of impalas' coats in the grasslands of East Africa. B. Mining in the Guinean Forests of West Africa to provide diamond and gold jewelry for humans. C.

A herringbone or tire track pattern on a radiograph is a result of

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass

Drivers are able to see objects ahead of them because light travels through windshields.

How are trade winds affected by the coriolis effect

When a raw egg gets heated into an edible egg is this considered a physical or chemical change?

Starting at its rightmost position, it takes 2 seconds for the pendulum of a grandfather clock to swing a horizontal distance of 18 inches from right to left and 2 seconds for the pendulum to swing back from left to right.