A person in good physical condition can provide W of useful electrical power by doing mechanical work, neglecting any problems of generator efficiency and practical considerations such as resting time.
How many people would it take to run a 4.00-kW electric clothes dryer?
How many people would it take to replace a large electric power plant that generates 800 MW?
The density of gold is 19.3 g/cm3. What is the density in kilograms per cubic meter?
The density of nuclear matter is about kg/m3. Given that 1 mL is equal in volume to 1 cm3, what is the density of nuclear matter in Mg/µL?
Mars has a mass of kg and has a volume of km3.
Calculate the density of Mars in kg/m3.
Calculate the diameter of Mars in km.
Intensities to which the ear can respond, from the threshold of hearing to the intensity which causes damage after even brief exposure, differ by a factor of . If you could measure distances over the same range of values with a single instrument and the smallest distance that the instrument could measure was 1 mm, what would be the largest distance that the instrument could measure?
For an series circuit, , , and .
If an ac source of variable frequency is connected to the circuit, at what frequency is maximum power dissipated in the resistor?
What is the quality factor of the circuit?
What is the area of a circle 3.102 cm in diameter?
Restate the mass kg using a metric prefix such that the resulting numerical value is greater than one but less than 1 000.
What is the volume of Jupiter in cubic km3? Use a value of m3 for the volume of Jupiter.