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An iron boiler of mass 180 kg contains 560 kg of water at 20âC . A heater supplies energy at the rate of 9.2Ã104 kJ/h.
Part A:
How long does it take for the water to reach the boiling point?
Express your answer using two significant figures.
Part B:
How long does it take for the water to all have changed to steam (including the time to reach the boiling point)?
The current in an electron beam in a cathode-ray tube is measured to be 70 uA. How many electrons hit the screen in 5.0s
Find the frequency in terahertz of visible light with a wavelength of 441 nm in vacuum
A turntable has rotational inertia I and is rotating with angular speed w about a frictionless vertical axis. A wad of clay with mass m is tossed onto the turntable and sticks a distance d from the rotation axis. The clay hits horizontally with it..
A tennis player tosses a tennis ball straight up and catches it after 3.0 s. Find the initial velocity of the ball
we dont really use our textbooks book that much but we haveproblems like what is the differnce between temperature and heat
a 2kg block of wood slides on the surface shown. all surfaces are frictionless, except the trough which is rough; the coefficient of kinetic friction there is 0.2 and the trough is 15m long. where will the block come to rest
A 2.0 cm tall candle flame is 1.8 cm from a wall. You happen to have a lens with a focal length of 36 cm . 1. How many places can you put the lens
In a famous scene of a movie, Indiana Jones is dragged behind a nazi truck by his whip. Jones' mass is 90 kg, Find the Tension on the whip
an average neutron star has approximately the same mass as the sun but is compressed into a sphere of radius roughly 10
A small airplane with a wingspan of 15.0 m is flying due north at a speed of 60.0 m/s over a region, What potential difference is developed between the airplane's wingtips
An object of mass 2.00 kg is held at a position A, a vertical height of 20.0 m above the ground. Point B is 8.00 m directly below A. Neglect air resistance and use g = 10.0 m/s.
After sliding on a rough, horizontal surface, a 25.0-kg rock initially going 8.5 m/s eventually stops due to friction. What average power is produced by friction
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