supposed to vacuum cleaner uses 120 J of electrical energy. If 45 J used to pull air into a vacuum cleaner, how efficient is the vacuum cleaner?

The transformer is based on: O inversion O induction O conduction O resistance

If a wave has a frequency of 8hz it has a period of

You are given $1000.00 but you must spend 1/2 the first year, and 1/2 the balance for each year thereafter. If you spend the maximum allowed each year, at the end of what year would you have $31.

Which of the following statements best explains why liquid water is NOT found on Jupiter? The gas on the planet causes the liquid to evaporate The temperatures are too hot so the liquid water vaporizes The planet lacks a solid surface and the

If sound travels at 5600 m/s through a steel rod, what is the wavelength, given a wave frequency of 2480 Hz

Give three examples of situations where you want as little energy as possible to be dissipated.

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?

The effects on marijuana can last up to

A ball is dropped from an initial height and allowed to bounce repeatedly. On the first bounce (one up-and-down motion), the ball reaches a height of 32 inches. On each successive bounce, the ball reaches 75% of its previous height.

An inductor with an inductance of 3.50 H and a resistance of 8.00 Ω is connected to the terminals of a battery with an emf of 4.00 V and negligible internal resistance.