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A heat lamp emits mostly infrared radiation. Suppose the average wavelenth emmited by a heat lamp is 1500 nm and its power output in EM radiation is 200 W. Changing the values to this question ___ what is the correct answer? A heat lamp emits mostly infrared radiation. Suppose 25% (NOT half) of power emitted goes into the shoulder. Then what is the answer in the unit of second (s)?
Each second, 1.25 x 1019 electrons in a narrow beam pass through a small hole in a wall. find the magnitude of the magnetic field in the wall at a radius of 0.750 meter from the center of the beam
A block of mass m1 on a smooth, horizontal surface is connected to a ball of mass m2 by a lightweight cord over a lightweight , frictionless pulley , Determine the normal force exerted by the table on the block
An alpha particle, which is a helium nucleus, has a mass of 6.64*10^-27 kg. It is travleing horizontally at 42.3 km/s when it enters a uniform, What is the diameter of the path followed by the alpha particle
in the operation of a hydraulic jack suppose one has area 0.0200 m2 and the other area 0.0500 cm2. the two pistons are
A tennis ball with a speed of 11.9 m/s is thrown perpendicularly at a wall. what is the average magnitude of acceleration of the ball while it is in contact with the wall
To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. determine the man's upward acceleration
A spring, with a force constant 5.00x10^2 n/m, is horizontal with one end fixed to a wall and the other end free. How far will the block travel once the spring is released
Coherent microwaves of wavelength 5.00 centimeter enter a tall, narrow window in a building otherwise essentially opaque to the microwaves. find the distance from central maximum to first-order minimum
An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 18.5 m/s and decelerates at a rate of 0.150 m/s2 as it goes through. How fast is it going when the nose leaves the station
a bat flies toward a wall emitting a steady sound with a frequency of 20.0 khz. this bat hears its own sound plus the
A motorcyclist intends to perform a stunt in which he jumps a river 25 meters wide. The motorcyclist must jump from a cliff on one side to a cliff 20 meters lower on the other side. The motorcyclist approaches the cliff's edge at a speed of 50 met..
Josh starts his sled at the top of a 3.3m -high hill that has a constant slope of 25 ^\circ. How far from the base of the hill does he end up
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