Elemental chlorine (Cl2) is not a compound because A. it is not a molecule. B. it has only one kind of atom. C. it is a mixture. D. it is inorganic.

David drinks a glass of water in his kitchen. The water is at room temperature, and David decides to make it colder by adding ice. Which of the following describes why the ice cubes will melt? A.

A 125 kg linebacker runs to the right at 2.5 m/s and an 80 kg quarterback runs to the left at 3 m/s. They collide in midair and the linebacker holds on to the quarterback so they move off together.

A pot contains 257 g of water at 99°C. If this water is heated and all evaporates to form steam at 100°C, what is the change in the entropy of the H2O?

An object of mass 1 kg is traveling with a constant speed of 10 m/s in the positive x-direction. Consider case 1 in which the object above comes to a stop in 1 second.

What is a transfer a wave

A rock with mass m = 3.60 kg falls from rest in a viscous medium. The rock is acted on by a net constant downward force of F = 15.

Two electrons are 2.3nm apart. What is the force between two electrons?

3. In a demonstration learning activity, A. the teacher shows children how something works or how to complete an entire activity. B. each child shows and tells about a favorite toy. C.

A 0.12 kg paper airplane flies in a straight line at a speed of 1.3 m/s. How much kinetic energy does the airplane have?

Each atom is composed of electrons and positive material. The mass of the atom is evenly spread throughout the atom. Neutrons are located in the center of the atom. Positive charge occupies a very small volume in the atom.