Which is the most reliable source of scientific information? a scientific website with anonymous authors a student's opinion a peer-reviewed scientific journal an editorial in the newspaper

Describe the energy transformations that occur when you bounce a ball?

Choose the correct statement. a. Usually, when one form of energy is converted to another, no energy is wasted. b. The total amount of energy in the universe is gradually decreasing. c. This statement illustrates the first law of thermodynamics. d.

What force allows two protons to stick together?

A potted plant has a weight of 24.5 N. What is the mass of the potted plant?

A teacher performing demonstration finds that a piece of cork displaces 23.5 ml of water. The piece of cork has a mass 5.7 g. What is the density of the cork?

What controls the net direction of molecules?

Dispersion is the separation of white light into separate colors by A. differences in wavelength B. differences in wave amplitude C. the blocking of light D. constructive interference

Why would a person choose to tie a helium-filled balloon to a child's wrist instead of simply having the child hold on to it? A. Helium is less dense than air, so it will float above air if the child lets go of the balloon. B.

What process is the method by which a neutral object obtains an electrical charge?

Which of the following examples is most like a non-explosive eruption? Squeezing a ... A: Medium-sized rock B: Sponge soaked in water C: A raw egg D: Water balloon