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Your favorite radio station broadcasts at a frequency of 93.7 MHz with a power of 50.5 kW. How many photons does the antenna of the station emit in each second?
A 38.0 kg wheel, essentially a thin hoop with radius 2.40 m, is rotating at 460 rev/min. It must be brought to a stop in 23.0 s. (a) How much work must be done to stop it? (b) What is the required average power? Give absolute values for both parts.
A wire is formed into a circle having a diameter of 10.6 cm and is placed in a uniform magnetic field of 2.73mT. Find the maximum torque on the wire
A 4.60 g bullet moving at 616 m/s strikes a 670 g wooden block at rest on a frictionless surface. The bullet emerges, traveling in the same direction with its speed reduced to 432 m/s. What is the speed of the bullet-block center of mass
A water heater is operated by solar power. If the solarcollector has an area of 6.00 m2, and the intensitydelivered by sunlight is 550 W/m2, how long does it taketo increase the temperature of 1.00 m3 of water from20.0°C to 60.0°C?
The components of velocity of an object moving in two dimensions are 40 m/s westward, and 28 m/s southward. What is the object's heading, in degrees
At what angle of incidence will green light (g = 560 nm) be most strongly reflected? Imagine the film has the minimum thickness that can produce these reflections.
A flat coil of wire is used with an LC-tuned circuit as a receiving antenna. The coil has a radius of 0.25 m and consists of 480 turns. find the magnitude of the average emf induced in the antenna
What is the Reynolds number for the fastest falling ball in the experiment. Use the same data as in problem 1, glycerin density of 1.30 g/cm^3
A car is traveling at 43.2km/hr on a flat, concrete highway. If the brakes are applied such that skidding occurs, the kinetic coefficient of friction between the road and tires is 0.808. If anti-lock brakes are properly applied after that no skidd..
The maximum torque experienced by a coil in a 0.80 T magnetic field is 8.4 10-4 N · m. What is the length of the wire from which the coil is made
What is the speed of the cart if the man suddenly starts running to the left with a speed of 9-m/s relative to the cart.
suppose you have an electric hot water heater for your house which is an aluminum cylinder which has a 0.56 m radius
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