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A keg of beer is covered with a wet towel. Imagine that the keg gains energy from its surroundings at a rate of 20 W.
Part A. At what rate in grams per second must water evaporate from a towel placed over the keg to cool the keg at the same rate that energy is being absorbed?
Part B. How much water in grams is evaporated in 2.0 h?
Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm; what force is exerted by the biceps muscle
Violet light and red light travel through air and strike a block of plastic at the same angle of incidence. The angle of refraction is 30.760° for the violet light and 31.280° for the red light. The index of refraction for violet light in plastic..
The current in the figure below is 0.53 A. (Let the internal resistance of battery 1 be r1 = 1.4 Ω and the internal resistance of battery 2 be r2 = 1.3 Ω.), Find the voltage drop Vab.
a car is going at a speed of 21.6 kmhr when it encounters a 12.8m long slope of angle 30 degree. the friction
A point charge with charge q1 is held stationary at the origin. A second point charge with charge q2 moves from the point (x1, 0) to the point (x2,y2). Please use k for Coulomb's constant rather than writing it out as (1/4π?0).
A chunk of 22 gram ice is pulled from a freezer keeping temperature -25 deg. Celsius, and placed in an identical calorimeter as the one described in problem 1. What is the experimental latent heat of fusion of ice
A cylinder contains a piston on each side of which is one kilomole of an ideal gas. The walls of the cylinder are diathermal, What is the change in the Helmholtz potential
In a common test for cardiac function the patient walks on an inclined treadmill. Find the power required from a 75 kilogram patient when the treadmill is sloping at an angle of 15o and the velocity is 3.3 km/h.
But how could dark photons be distinguished from a violation of mass-energy conservation? Is it possible? If not, does that mean mass-energy conservation prohibits the existence of such particles.
A solenoid1.20m long and2.80cm in diameter carries a current of21.0A. The magnetic field inside the solenoid is 21.0mT. Find the length of the wire forming the solenoid.
a plane flying horizontally at a speed of 50.0 ms and at an elevation of 160 m drops a package. two seconds later it
The Earth cools off a night more quickly when the weather is clear than when it is cloudy, why? Describe why the temperature of a gas increase when it is adiabatically compressed.
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