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A 4-m x 5-m x 7-m room is heated by the radiator of a steam-heating system. The steam radiator transfers heat at a rate of 10,000 kJ/h and a 100-W fan is used to distribute the warm air in the room. The rate of heat loss from the room is estimated to be about 5000 kJ/h. If the initial temperature of the room air is 10°C, determine how long it will take for the air temperature to rise to 20°C. Assume constant specific heats at room temperature.
A force F is applied horizontally to a block of mass 2 kg which, nevertheless, slides down a frictionless 5-m plane inclined at 25 degrees to the horizontal. what is its acceleration down the plane
Is it possible for both the pressure and volume of a monatomic ideal gas to change without causing the internal energy of the gas to change?
A system is acte on by its suroundings in such as way that is receives 50 J of heat while doing 20 J of work. What is its net change in internal energy?
A rectangular loop with dimensions 4.20 cm by 9.50 cm carries current I . The current in the loop produces a magnetic field at the center of the loop that has magnitude 3.40×10?5 T and direction away from you as you view the plane of the loop.
A 54-kg skater initially at rest throws a 3.0-kg medicine ball horizontally to the left. Determine the acceleration of the ball during the throw
A nylon guitar string has a linear density of 7.0 g/m and is under a tension of 150 N. The fixed supports are distance D = 90.0 cm apart. calculate the frequency of these traveling waves
A ladybug starts at the center of a 16.0 {\rm in}.-diameter turntable and crawls in a straight radial line to the edge. While this is happening, the turntable turns during a 45.0^\circ angle. Discover the magnitude and direction of the ladybug's disp..
A large tub rests at the edge of a table 1m high. The tub is full, and is 2m tall with an area of 1000cm^2. Determine the speed of the water as it leaves the side
A golfer, putting on a green, requires three strokes to "hole the ball." During the first putt, the ball rolls 4.0 m due east. For the second putt, the ball travels 3.1 m at an angle 20° north of east. The third putt is 0.50 m due north. What disp..
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 1.5 × 1013 kg·m/s. Find the relativistic momentum of the spacecraft
Using your own judgment, estimate the gallons of gasoline consumed in Norman, OK (100,000 people). State your assumptions.
The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle ?. find the height H for the block on the longer track
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