Which of the following must be true for "P if and only if Q" to be true?

Distance from saturn to the sun

As the wavelength increases, the frequency? A. decreases and energy decreases B. increases and energy increases C. decreases and energy increases D. increases and energy deceases

Which one of the following is not a step in the inquiry process A. Investigate B. Classify C. Summarize D. Observe

A person using an oxygen mask is breathing air that is 33% oxygen. what is the partial pressure of the o2, when the air pressure in the mask is 110 kpa

If a wave vibrates back and forth three times each second, and its wavelength is 2 meters, what is its frequency

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?

Now assume that the pitcher in Part D throws a 0.145-kgkg baseball parallel to the ground with a speed of 32 m/sm/s in the + x direction. The batter then hits the ball so it goes directly back to the pitcher along the same straight line.