Which of the following contains both protons and neutrons?

a. outer shell

b. nucleus

c. covalent bond

d. ionic bond

A light ray is traveling in air with an index of refraction of unity and it is reflected at the boundary or a second medium with an index of refraction n.

An inclined plane is 30 meters long and 2 meters high what is the mechanical advange of the inclined plane

Standing in which of the following places would a shock from an electric fence be the most unpleasant? A. In wet grass B. On dry, thick gravel C. Near animals D. In tall grass

Name a common product produced by blow molding.

What is mantle convection? A. cool matter rises and heats up and then falls and cools again and again, sometimes it will be erupted out of volcanoes B.

Two identical capacitors are arranged in a circuit. What is the ratio of the equivalent capacitance of the circuit when the capacitors are in series to that when they are in parallel?

A car's position in relation to time is plotted on the graph. What is the car's average velocity for segment C? A) - 4 m/s B) - 0.25 m/s C) 0.25 m/s D) 4 m/s

What percent of my Iodine-131 sample will be left after 7 half-lives?

A 58.0 kg snow skier is on the top of 351 m high hill. After she has gone down a vertical distance of 142 m, what is her mechanical energy? Explain your answer (CER) !

A sphere has a mass of 2.10kg and travels along a horizontal plane at the velocity of 12.2m/s. Find the energy