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Q. A 145 g copper bowl contains 205 g of water, both at 20°C. A very hot 300 g copper cylinder is dropped into the water, causing the water to boil, with 5.40 g being converted to steam. The final temperature of the system is 100°C. Avoid energy transfers with the environment. (a) How much energy (in calories) is transferred to the water as heat? (b) How much to the bowl? (c) What is the original temperature of the cylinder?
If astronauts could travel at v = 0.950 c, we on Earth would say it takes (4.20 / 0.970) = 4.42 years to reach Alpha Centauri, 4.20 light-years away. The astronauts disagree. How much time passes on astronauts' clocks? What is the distance to Alph..
A ladder 7.09 m long leans against the side of a building. If the ladder is inclined at an angle of 79.50° to the horizontal, what is the horizontal distance from the bottom of the ladder to the building.
A long, straight wire carries a 25.0 current. An electron is fired parallel to this wire with a speed of 280 in the same direction as the current, 2.30 from the wire.
The electric field everywhere on the surface of a thin spherical shell of radius 0.780m is measured to be equal to 940 N/C and points radially toward the center of the sphere.
Light with a wavelength of 618 nm passes through a slit 7.52 wide and falls on a screen 1.88 m away. compute the linear distance on the screen from the central bright fringe to the first bright fringe above it.
If a drop is to be deflected a distance = 0.28 by the time it reaches the end of the deflection plate, what magnitude of charge should be given to the drop? Imagine that the density of the ink drop is 1000 and ignore the effects of gravity.
What will the traveler weigh on another planet. Two wires are identical, except that one is aluminum and one is iron. The aluminum wire has a resistance of 0.18 . What is the resistance of iron wire.
The cylindrical space station, 200 m in diameter rotates in order to give artificial gravity of 3.0 g for the occupants. How much time does it take, in seconds, to complete one revolution.
The perspective provided by Multiple-Concept is useful here. The highest barrier that a projectile can clear is 15.60 m, while the projectile is launched at an angle of 23.0 ° above the horizontal. What is the projectile's launch speed.
A puck slides along the frictionless track shown in the figure with an initial speed of 7.40. Suppose the puck turns all corners smoothly, with no loss of speed.
Calculate the magnitude and direction of net electric field. what is the efficiency of the engine under those conditions.
Blocks with masses of 2.0 , 4.0 , and 6.0 are lined up in a row on a frictionless table. All three are pushed forward by a 57 N force applied to the 2kg block.How much force does the 4 block exert on the 6.0 block.
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