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The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.60 10-10 T. The wave passes perpendicularly through an open window, the area of which is 0.20 m2. How much energy does this wave carry through the window during a 45-s phone call?
Your friend, who is exactly the same age as you, travels at a speed of 0.9990c to a star 25 light-years away. How long does she measure for the time she is away
a lower tank contains water while an upper tank contains air with a negligable concentration of water vapor. what mass of water vapor diffuses through the tube each hour
An 93-g arrow is fired from a bow whose string exerts an average force of 120N on the arrow over a distance of 77cm, What is the speed of the arrow as it leaves the bow
A point source of light is submerged 2.5 m below the surface of a lake and emits rays in all directions. What is the maximum radius that this circle could have
In a Young's experiment using sodium light, lamda=589 nm, the slits are 1.2x10^-6 m wide. You notice that every fourth fringe is missing. how many fringes appear on the screen
A spring of negligible mass stretches 3.00 cm from its relaxed length when a force of 7.70 N is applied. A 0.490-kg particle rests on a frictionless horizontal surface, What is the amplitude of the motion
For your final exam in electronics, you're asked to build an LC circuit that oscillates at 15kHz, What values of inductance and capacitance must you use
A ball thrown upward returns to the same level after 4s in the air. How long would that ball take to reach the same level
An L-R-C series circuit has 97.5%u03A9 , and the amplitude of the voltage across the resistor is 30.0VV . What is the average power delivered by the source
A man is dragging a trunk up the loading ramp of a mover's truck. The ramp has a slope angle of 20.0 degrees, Find the vertical component of the force
It takes a student t = 5.2 s to push a block m = 6 kg at a constant velocity over a distance of d = 4.6 m. How much power was applied to the block in Watts
If you weigh 670 on the earth, illustrate what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 19.0?
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