Question

1.

In home energy conservation, the R-value of a piece of material increases when ________ .

Group of answer choices

the material gets thinner

covering a larger area

the material gets thicker

the outside temperature gets lower

2.

If an object is moving with a positive, non-zero acceleration, its velocity is not constant.

Group of answer choices

True

False

3.

Which of the following is a major advantage of solar energy?

Group of answer choices

Pollution is generated when electricity is created.

The delivery of electricity to rural areas is not possible with solar.

Solar energy is “free”, abundant, renewable and clean.

Electricity from photovoltaic cells is too expensive, and the cost is not decreasing.

Solar intensity varies with the time of day and the season.

4.

Besides the collection of energy in a nuclear reactor, which other source of energy has its origin in the radioactive decay of matter on Earth?

Group of answer choices

Wind

Geothermal

Solar

Hydro

5.

Nuclear reactions involve the rearrangement of protons and neutrons, where mass is converted into energy following Einstein’s famous equations E=mc². As a result, ________ is a major advantage of using nuclear power compared to the conventional combustion power plant.

Group of answer choices

environmental friendliness

higher energy density

low risk

cost effectiveness

Answer 1