What is the process in which trace amounts of other elements are added to a material to make it a semiconductor?

a. doping

c. ionization

b. salting

d. conduction

What is an example of short-term climate change?

The total power used by humans worldwide is approximately 15 TW (terawatts). Sunlight striking Earth provides 1.336 kW per square meter (assuming no clouds). The surface area of Earth is approximately 197,000,000 square miles.

Initially, a 1.50-liter compressible container of 0.35 moles of a gas exerts a pressure of 740 millimeters of mercury at a temperature of 275 Kelvin. What is the pressure when the container is compressed to 0.50 liters, the moles of gas reduces to 0.

What comes to mind when you hear the term acid and base?

Urine has a pH range of 5.5 to 6.9, so its H3O + concentration should not exceed what value

What is one element in the same family as oxygen?

Why does a ball rolling along a level sidewalk slow down and then stop

Common properties of sodium, calcium, iron, and gold

The closeness of a measurement to its actual value is a measure of its A. usefulness. B. reproducibility. C. precision. D. accuracy.

At 300 k the pressure inside a gas filled container is 500 kPa if the pressure inside decreses to 100kpa but the volume remains the same what is the final temperature of the gas