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A monochromatic point source of light emits 5.5 W of electromagnetic power uniformly in all directions. Find the (magnitude of the) Poynting vector at a point situated at each of the following locations:
(a) 0.45 m from the source
(b) 0.51 m from the source
(c) 1.00 m from the source
A stone is dropped from the roof of a building; 1.30s after that, a second stone is thrown straight down with an initial speed of 23.0m/s , How long did it take the first stone to reach the ground
In this particular problem and solution, the answer makes sense butone of the conversions does not. For the conversion from density in cm cubed to the density in meters cubed why is the conversion times 10^3? how did this conversion come about when t..
An aluminum rod is clamped one quarter of the way along its length and set into longitudinal vibration by a variable-frequency driving source. obtain the length of the rod
Water moves through a constricted pipe in steady, ideal flow. At the lower point the pressure is 1.73 105 Pa and the pipe radius is 2.80 cm. Find the speed of flow in the lower section
A plane flies at 234 mi/hr (air speed) in the direction northeast; there is a wind of 51 mi/hr (ground speed) in the direction southeast. How far will the plane fly in 94 minutes
Draw a circuit for two resistors R1 and R2 in series, in parallel with a third resistor R3 in series with a capacitor C1. What will be the time constant of voltage decay
A 2.0 kg ball is thrown at the suspended 29.4 kg block with a velocity of 3.5 m/s. The coefficient of restitution between the ball and the block is e = 0.69. What is the maximum height h to which the block will swing? (mm)
A tall tree is growing across a river from you. You would like to know the distance between yourself and the tree, as well as its height, How far away is the tree
An antitank weapon fires a 3.00 kg rocket which acquires a speed of 50m/s after travelling 90cm down a launching tube. Assume the rocket was accelerated uniformly, what force acted on it.
The Hubble Space Telescope (HST) is on a circular, low-Earth orbit, at an elevation h = 600 km above the Earth's surface. The orbital period is about 5800 seconds. For an observer who sees HST pass through the zenith, how long is HST above the horizo..
A 27.0-kg child on a 3.00-m-long swing is released from rest when the ropes of the swing make an angle of 35.0° with the vertical, Neglecting friction, find the child's speed at the lowest position
Two point charges are on the y-axis. A 5.0 µC charge is located at y = 1.45 cm, and a -2.26 µC charge is located at y = -1.70 cm. Find the total electric potential at the origin
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