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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 drag racer starts from rest and accelerates for 12.3 s with a constant acceleration until it has travelled 400 m. What is the stopping distance for the drag racer
question a transformer has n1 350 turns and n2 2 000 turns. if the input voltage is ?v t 170 v cos wt what rms
In Rutherford scattering of alpha particles from a thin gold foil, determine a maximum possible radius of the nucleus
An alpha particle (the nucleus of a helium atom formed by 2 protons and 2 neutrons, What would be the force on the alpha particle if it were traveling parallel to the magnetic field lines
a charged cloud system produces an electric field in the air near earths surface. a particle of charge -2.2 x 10-9 c is
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 5.0. Calculate the intial kinetic energy of the system
A 1.3-kg 16-cm-diameter solid sphere is rotating about its diameter at 69 rev/min. what is the new angular speed of the ball
A thermos contains 141 cm3 of coffee at 92.9 °C. To cool the coffee, you drop two 10.4-g ice cubes into the thermos. What is the final temperature of the coffee
A 27.78 cm diameter cylinder that is 39.07 cm long containes 59.46 g of oxigen gas at 22°C. How many moles of oxigen are in the cylinder
A bullet of mass 7.00g is fired horizontally into a wooden block of mass 1.21kg resting on a horizontal surface. compute the initial speed of the bullet
A pot with a steel bottom 8.50mm thick rests on a hot stove. The area of the bottom of the pot is 0.150m^2. Find the temperature of the lower surface of the pot
A particular engine has a power output of 4.00 kW and an efficiency of 25.0%. Assume the engine expels 7000 J of energy in each cycle. Find the time required to complete each cycle
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