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A typical cost for electric power is 12.0 cents/ per kilowatt-hour.
Suppose your refrigerator uses 500 W of power when it's running, and it runs 8 hours a day. What is the yearly cost of operating your refrigerator?
Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 5021 kg), which is made of steel (? = 7770 kg/m3). How many balls are required to float the ship
An aircraft weighing 812 N is accelerated at 11.8 m/s2 for 5 seconds, at which time the aircraft launches. Assume the acceleration is constant
An airplane with a speed of 87.7 m/s is climbing upward at an angle of 35.1 ° with respect to the horizontal. determine the angle of the velocity vector of the package
A barge on a still lake is moving toward a bridge at 10.0 m/s. When the bridge is 41.0 m away, the pilot slows the boat with a constant acceleration of -0.88 m/s2, Find the final velocity for each time using v = v0 + at
A violinist places her finger so that the vibrating section of a 1.20 g/m string has a length of 40.0 cm, then she draws her bow across it. A listener nearby in a 20 ^circ {rm C} room hears a note with the wavelength of 30.0 cm. What is the tensio..
A 62.0 m length of insulated copper wire is wound to form a solenoid of radius 2.1 cm. The copper wire has a radius of 0.53 mm. How long is the resulting solenoid
How much energy is necessary to bring the system back
A soccer player extends her lower leg in a kicking motion by exerting a force with the muscle above the knee in the front of her leg. What is the force exerted by the muscle if its effective perpendicular lever arm is 1.80 cm
What is the electric potential energy of a system that consists of two protons 2.1×10?15 m apart-as might occur inside a typical nucleus
Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
A 100 kg car travelling at 20 m/s collides with a 100 kg car traveling at 8 m/s in opposite direction, a) if the two cars stick together, what is their final velocity
A projectile with mass .065 kg is fired at and embeds itself in a pendulum with mass .19 kg. What is the percent kinetic energy loss during the perfectly inelastic collision
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