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1. How much heat is required to raise the temperature of 415 g of water from 20°C to 32°C?
2. How much work is required to push a crate at constant velocity with a force of 195 N across a floor a distance of 8 m?How many calories of thermal energy are produced by the friction?
3. During a process, 28 J of heat are transferred into a system, while the system itself does 12 J of work. What is the change in the internal energy of the system?
4. How much heat is required to convert 175 g of ice at -6°C to water at 6°C?
5. What would happen if absolute zero could be reached?
6. An engine takes in 8000 cal of heat and exhausts 4000 cal of heat each minute it is running. How much work does the engine perform each minute?
If we imagine an electron as orbiting the proton, with the orbit of radius 5 x 10 ^-11 m, what is the total energy of the atom
A) Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat of the metal? B) Which is more useful for storing heat, this metal or an equal weight of water? defin..
A predatory fish can accelerate from rest to 5 m/s in 0.28 s. What is the acceleration of the fish
The distance between the eyepiece and the objective lens in a certain compound microscope is 24.5 cm. Find the overall magnification of the microscope
A box of mass 5.4 kg is accelerated from rest by a force across a floor at a rate of 2.0 m/s2 for 9.0 s. Find the net work done on the box
If the uncertainty in the energy of an excited state is a billionth of an electron volt (1 neV), what is the half-life of the state
Use the surface energy balance equation to calculate the latent heat flux given that the Bowen ratio is 0.6, the net incoming radiation is 50 J m-2 s-1
Calculate the energy content of 1 kg of natural uranium assuming complete fission. Estimate an average energy per fission. Compare this to the energy in 1 kg of coal (reference all values assumed).
Gas lanterns used on camping trips have mantles (small lacy bags that give off light) made from a rayon mesh impregnated with thorium, A typical mantle contains 345 mg of thorium. What is the activity of the mantle
A 750-N Marine in basic training climbs a 9.5-m vertical rope at a constant speed in 8.25 s. What is his power output
A plate carries a charge of -3.7 C, while a rod carries a charge of +1.9 C. How many electrons should be transferred from the plate to the rod, so that both objects have the same charge.
A 3.0 kg block rests on a 30 degree slope and is attached by a string of neglible mass to a sold drum of mass 0.80 kg and radius 10.0 cm, Find the angular accleration of the drum
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