Question 1

Which of these forms of alternate power does not get its energy from the sun either directly or indirectly?

Accepted Answer

A) Geothermal 
B) Hydroelectric 
C) Wind 
D) Biomass 
E) Solar 
A) Geothermal 
B) Hydroelectric 
C) Wind 
D) Biomass 
E) Solar

Question 2

How many square meters of photovoltaic cells would be required to provide sufficient energy to run a 11 W compact disc player? Photovoltaic cells are 15% efficient in converting 1000 W\m2 of solar energy to electricity.

Accepted Answer

A) 1.1 × 10 − 3 m2 
B) 0.73 m2 
C) 14 m2 
D) 20 m2 
E) 75 m2 
A) 1.1 × 10 − 3 m2 
B) 0.73 m2 
C) 14 m2 
D) 20 m2 
E) 75 m2

Question 3

Which of these factors  provides a source of energy to excite electrons which move across an p-n junction?

Accepted Answer

A) Light 
B) Heat 
C) Silicon 
D) Steam 
E) External current 
A) Light 
B) Heat 
C) Silicon 
D) Steam 
E) External current

Which of these forms of alternate power does not get its energy from the sun either directly or indirectly?

How many square meters of photovoltaic cells would be required to provide sufficient energy to run a 11 W compact disc player? Photovoltaic cells are 15% efficient in converting 1000 W\m² of solar energy to electricity.

Which of these factors provides a source of energy to excite electrons which move across an p-n junction?

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

The Air Around Us

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology

Filters

Exam 10: Energy for Tomorrow: Solar and Other Renewable Energy Sources

Which of these forms of alternate power does not get its energy from the sun either directly or indirectly?

How many square meters of photovoltaic cells would be required to provide sufficient energy to run a 11 W compact disc player? Photovoltaic cells are 15% efficient in converting 1000 W\m2 of solar energy to electricity.

Which of these factors provides a source of energy to excite electrons which move across an p-n junction?

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

The Air Around Us

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology

Filters

How many square meters of photovoltaic cells would be required to provide sufficient energy to run a 11 W compact disc player? Photovoltaic cells are 15% efficient in converting 1000 W\m² of solar energy to electricity.