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A spring (k = 400 N/m) is hung vertically.
a) If a 5 kg mass is attached to the end of the spring and gently lowered to rest position, what will be the stretch of the spring?
b) If the 5 kg mass is attached and simply dropped, what will be the maximum velocity and the maximum stretch?
A generator is connected across the primary coil(Np turns) of a transformer, while a resistanceR2 is connected across the secondary coil(Ns turns).
The total electric field consists of the vector sum of two parts. One part has a magnitude of E1 = 1300 N/C, Find the magnitude and direction of the total field
A motorist drives south at 22 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.40 min, and finally travels northwest at 30 m/s for 1.00 min. For this 6.40 min trip, find out the following values.
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. What is the average power generated by the lifting force
One solenoid is centered inside another. The outer one has a length of 47.0cm and contains 6600 coils, compute the emf induced in the inner solenoid
Consider a heat pump which is used to cool down a home during the summer. Its coefficient of performance in cooling mode is 4.14. at what rate does it remove heat from the home
a 15 kg object floating in the water has .21 of its volume above the surface of the water. what is the volume of the
A rectangular loop is made up of 50 turns of wire and has dimensions of 23 x 64 cm. It is located in a uniform 1 T magnetic field. Over a time of 1.2 s, Calculate the average emf induced in the coil
A rod flies with constant velocity past a mark which is stationary in the K frame. In the K frame, it takes the rod Deltat = 20 ns to fly pass the mark. In the K' frame fixed to the rod, the mark moves past the rod in Deltat' = 25 ns. Find (a) the ve..
If the gravitational potential energy of a 30.7-kg rock is 643 J relative to a value of zero on the ground, how high is the rock above the ground
a meteorologist for a tv station is using radar to determine the distance to a cloud. he notes that a time of 0.28ms
A storage tank has a diameter of 80 ft, a height of 25 feet, and contains oil to a height of 15 ft. The suction pumps, whichcan handle 15, 000 bbl/d are started, but the safety valves areclogged and a vacuum is drawn in the tank. The roof is flata..
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