How are sound energy and light energy similar?

A.

They both need a medium to travel through.

B.

They both have a wavelength and a frequency.

C.

They are both kinds of mechanical energy.

D.

They are both carried from place to place by particles.

Why don't the noble gases form compounds readily? A. they have empty outer energy levels B. they have no electrons C. they have seen electron in the outer energy level D. their outer energy level are completely filled with electrons

A football is kicked from a tee at an angle of 53 degrees above the horizontal with an initial speed of 20 m/s. A coach times the flight of the ball and finds it was in the air for 3.3 seconds.

If a net force of 34.3 N is required to move the system in the figure to the right 2.3 m in 1.3 seconds what is the systems mass

In multicellular organisms, cells and organ systems are specialized to perform specific tasks. For example, the respiratory system in animals and the shoot system in plants allow these organisms to take in the atmospheric gases they need and release

Carbon dioxide converts directly from a solid to a gas. Whatnprocess is this called

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.

A hot-air balloon is ascending at the rate of 14 m/s and is 84 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?