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A block of mass ‘m' is suspended from the ceiling of a stationary standing elevator through a spring of spring constant ‘k'. Suddenly the cable breaks and the elevator starts falling freely. Show that the block now executes a simple harmonic motion in the elevator. Find the amplitude.
A rower can row at 3.77 m/s in still water. He wants to row directly across a river 252 wide with a constant current of 1.33 m/s. calculate how long will it take him to cross the river
a hydrogen atom in a state having a binding energy the energy required to remove an electron of 0.378 ev makes a
Two long, straight parallel wires are separated by a distance of 21.1 cm. What is the magnitude of the resulting magnetic field at apoint that is 12.1 cm from each wire
Suppose that a person singing in the shower is producing1.34 mW of sound power. Some of the soundis reflected from the floor and ceiling. The intensity of this reflected sound at a distance of 3.01 mfrom the source is 4.40 10-6 W/m2.
A cylinder is rotating about an axis that passes through the center of each circular end piece. The cylinder has a radius of 0.0550 m, Find the magnitude of the angular deceleration of the cylinder
You wrap a single layer of copper wire (diameter .812mm) around a tube (diameter 4cm length 28cm) to create an air filled solenoid. how many turns are there per centimeter
220 cm3 of hot tea at 89°C are poured into a very thin paper cup with 70 g of crushed ice at 0°C. Calculate the final temperature of the "ice tea"
A drag racer crosses the finish line of a 304.8 m track with a final speed of 126 m/s. how long would it take to finish the race
The accepted value for the suns intensity at the earth is measured on an area with its normal along the suns "ray". Calculate the temperature of the sun
A 13 g bullet traveling 217 m/s penetrates a 2 kg block of wood and emerges cleanly at 153 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges.
A conducting bar rests on two parallel horizontal rails 50 cm apart forming a square area. The resistance of the bar and the rails is assumed to be constant and equal to 0.05 ??. What is the maximum value of the force acting on the bar during that ..
The rope wrapped around the outer diameter of the disk is pulled at a constant speed of 1.06 m/s. If the outer radius is 1.39 cm, how fast does the hanging mass rise
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