Francium decays with a half-life of 22 minutes. If we start out with 639 mg of francium, how much would remain after 2.7 hours?

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The force generated by a single muscle fiber can be increased by increasing is called

A large balloon is initially filled to a volume of 1.96 l at 318.44 k and a pressure of 2.89 atm. what volume of gas will the balloon contain at 1.77 atm and 336.33 k?

The elevator of a large building is to raise a net mass of 400 kg at a constant speed of 12 m/s using an electric motor. minimum power rating of the motor should be

A horizontal force of 20 newtons eastward causes a 10-kilogram box to have a displacement of 5 meters eastward. The total work done on the box by the 20-newton force is (1) 40 J (2) 100 J (3) 200 J (4) 1000 J

How much heat is required to raise the temperature of 0.25 kg of water from 35 C to 80 C?

What do nuclear fission and nuclear fusion have in common?

When plug prongs are connected to the metal case of an appliance, a part that should always be placed next to the case is a a. flat metal washer. b. hexagonal aluminum shoulder. c. steel nut. d. mica washer.

For a constant voltage, increasing the resistance will cause the current to decrease

Soils are made up of mineral portion an organic portion air and water what is meant by the word organic Nonliving mineral in composition Composed of several organs Material that was produced by or was/is part of living organism Musics in nature

A car is traveling at 42.0 km/h on a flat highway. (a) If the coefficient of friction between road and tires on a rainy day is 0.107, what is the minimum distance in which the car will stop?