Nicholas spends 20 minutes ironing shirts with his 1,800-watt iron. How many joules of energy were used

by the iron?

Electromagnetic waves can behave like particles

What scientific attitude is especially important when a scientist's results go against previous ideas? a. curiosity b. honesty c. skepticism d. creativity

A large bypass ratio turbofan engine has the following design and limit parameters: M0 = 0.8, altitude = 37 kft U. S. standard atmosphere, πd = 0.995, πc = 40, ec = 0.90, α = 6, πf = 1.6, ef = 0.90, πfn = 0.98, fan nozzle is convergent, τλ = 7.

In which activity is no work done? A. lifting a book B. holding a brick C. climbing stairs D. pushing a shopping cart

How do you find force?

Which of the following statements is true? A. Both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction. B. Nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not. C.

A star may form a black hole once it cannot?

Kai was 200 meters north of the library when he remembered he had to return some books to the library. It took him 200 seconds to do the round trip. Which best describes Kai's roundtrip?

The engine that powers a crane burns fuel at a temperature of 1500 oC. It is cooled by air at a temperature of 20 oC. The crane is used to lift a 1000 kg steel girder 30 m into the air.

The portion of a light ray that falls on a surface is a/an