It takes 3 minutes to make toast in a 1500 watt toaster. Calculate how much work is done by the toaster.

A)

8.3 J

B)

60 J

C)

90,000 J

D)

270,000 J

What is a fundamental physical quantity? Name three fundamental physical quantities and for each, give its S. I. units and its U. S. Customary units.

If element X has 42 protons, how many electrons does it have?

How do black holes loose energy when they orbit each other in binary?

As a storm front moves in you notice that the column of mercury in a barometer rises to only mm. (a) what is the air pressure? kpa (b) if the mercury in this barometer is replaced with water, to what height does the column of water rise?

Why does charging by rubbing happens best in dry weather?

How many additional electrons does this atom of oxygen need in its valence shell to satisfy the octet rule?

Calculate the momentum of a 1.60*10^3 kg car at 20.0 m/s

What is ten thousand more than 300,000 + 90,000 + 5,000 + 40 is

On October 21, 2001, Ian Ashpole of the United Kingdom achieved a record altitude of 3.35 km (11 000 ft) powered by 600 toy balloons filled with helium. Each filled balloon had a radius of about 0.54 m and an estimated mass of 0.27 kg.

Which of the following is an example of a concave mirror? surveillance mirror car side mirror reflecting telescope microscopes