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An electric car is being designed to have an average power output of 4,200 Watt for 2 hour before needing to be recharged. (Suppose there is no wasted energy.)
(a) Find how much energy would be stored in the charged batteries?
____J
(b) The batteries operate on 50 Volt. Find what would the current be when they are operating at 4,200 Watt?
_____A
(c) To be able to recharge the batteries in 1 hour, determine how much power would have to be supplied to them?
_____W
An outfielder in baseball throws a baseball from the warning track toward homeplate with a speed of 111.83 125 ft/s at an angle of 40.1640 degrees. where does the ball land relative to homeplate
A crate of eggs is located in the middle of the flat bed of a pickup truck as the truck negotiates an unbanked curve in the road. how fast can the truck be moving without the crate sliding
Two boat landings are 1 kilometer apart on the same bank of a stream that flows at 1.8 kilometer per hour. Evaluate the speed of the boat relative to the water
A metal strip 6.11 cm long, 1.26 cm wide, and 0.766 mm thick moves by constant velocity during a uniform magnetic field B= 1.32 mT directed perpendicular to the strip, as shown in Fig.28-37.
Show that when a nucleus decays by decay, the totalenergy released is equal to (Mp -Md -2Me) where Mp and Md are the masses of the parentand daughter atoms (neutral), and Me is the mass of anelectron or positron. Why is the electron massdoubled
An observer at rest perceives a signal from a source that is .5 asmuch as the signals frequency. With what speed and in what direction must the source be moving
The luxury linerQueen Elizabeth 2 has a diesel-electric powerplant with amaximum power of 87 MW at a cruisingspeed of 33.5 knots. What forward force is exerted on the ship at this speed
The other end of the spring braced against a post that was firmly anchored to the ship's frame. What was the speed of the cannon ball if the spring compressed 50cm as the cannon was fired.
An object weighing 305 N in air isimmersed in water after being tied to a string connected to abalance. The scale now reads 255 N. Find the density of the object
A 200 g ball of putty falls vertically into a 2.50 kg cart that is rolling freely at 2.00 m/s on a horizontal surface. What is the final speed of the cart
A time-dependent force, Fvecbold = (7.50i hat bold ? 4.05tj hat bold), How far is the object from its initial position when its speed is 15.0 m/s
a golfer tees off on level ground giving the ball an initial speed of 37.5 ms and an initial direction of 40.5deg above
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