Reference no: EM131187455

Part 1:

• In what sense does the moon fall?

• How does the force of gravity between two bodies change when the distance between them is tripled?

• Would the springs inside a bathroom scale be more compressed or less compressed if you weighed yourself in an elevator that accelerated upward? Accelerated downward? Would the springs inside a bathroom scale be more compressed or less compressed if you weighed yourself in an elevator that moved upward at a constant velocity? In an elevator that moved downward at constant velocity?

• Explain why occupants of the International Space Station are firmly in the grip of Earth's gravity, even though they have no weight.

• A stone is thrown up at an angle. Neglecting air resistance, what happens to the horizontal component of its velocity along its trajectory? The vertical component?

• A projectile is launched vertically at 100 m/s. If air resistance can be neglected, at what speed does it return to its initial level?

• What happens to an object close to Earth's surface if it is given a speed exceeding 11.2km/s?

Part 2:

• Distinguish between force and pressure.

• How does the pressure exerted by a liquid change with depth of the liquid?

• Why does buoyant force act upward on an object submerged in water?

• How does the buoyant force on a fully submerged object compare with the weigh of the water displaced?

Part 3:

• What are the temperatures for freezing water and boiling water on the Kelvin temperature scale?

• In which direction does thermal energy flow between hot and cold objects?

• How does heat differ from thermal energy?

• How is the energy value of food determined?

Part 4:

• What is the role of "loose" electrons in heat conductors?

• Describe how heat is transferred by convection

• What kind of objects give off radiant energy?

• What are the four common phases of matter, and what are the processes which transform one to another?

• Does a gas give off energy or absorb energy when it changes to a liquid? How about a solid changing into a liquid?

Part 5:

• Distinguish between an atom and an element.

• Distinguish between atomic number, mass number, and atomic mass.

• What happens to the properties of elements across any period of the periodic table?

• What causes an atom to emit light?

• What was Planck's quantum hypothesis?

Part 6:

• What does "radioactive" mean?

• Describe the three types of radioactive radiation: alpha, beta, and gamma.

• Why doesn't the repulsive electric force of protons in the atomic nucleus cause the protons to fly apart?

• What is meant by the half-life of a radioactive sample?

• Why is there more carbon-14 in living bones than in once-living ancient bones of the same mass?

• How is a nuclear reactor similar to a conventional fossil-fuel power plant? How is it different?

• Who discovered that energy and mass are two different forms of the same thing?

• What kind of nuclear power is responsible for sunshine?

Part 7:

• How many electrons can occupy the first shell? How many can occupy the second shell?

• How do the electron-dot structures of elements in the same group in the periodic table compare with one another?

• How does an ion differ from an atom?

• Why does the fluorine atom tend to gain only one electron?

• Which elements tend to form ionic bonds?

• Do metals more readily gain or lose electrons?

• Which elements tend to form covalent bonds?