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Two pendulums of equal length l = 0.45 m are suspended from the same point. The pendulum bobs are steel spheres. The first bob has mass 0.25 kg and the second has mass 0.85 kg. The first bob is drawn back to a 35 degree angle with the vertical, and then released such that it swings down and collides with the other bob.
a. To what maximum angle will the second bob rise if the collision was perfectly elastic?
b. If the bobs were made of putty such that they stuck together, to what maximum angle will the combined bobs rise after the collision?
A 140 ? lamp, a 25 ? electric heater, and a 57 ? fan are connected in parallel across a 137 V line. What is the current of the lamp
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Calculate the diameter of a 2.37 cm long tungsten filament in a light bulb if its resistance is 0.649 ohms
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In the figure below, a nonconducting rod of length L = 8.50 cm has charge -q = -4.32 fC uniformly distributed along its length. What is the linear charge density of the rod?
Egg incubation is an important determinant of the sex of many reptiles. In a study of loggerhead turtles 100% of the hatchings from eggs incubated at 26°C were male, while 100% of those from eggs incubated at 32°C were female.
Four charges are placed at the corners of a rectangle. If q1 = 43.0 x 10-9 C, q2 = 29.0 x 10-9 C, q3 = -42.0 x 10-9 C, q4 = -56.0 x 10-9 C, What would be the magnitude of the electrical field
A stopwatch is used to measure how long it takes a sprinter to run 100 meters. This stopwatch measures time intervals to hundredths of seconds. Using the stopwatch the timekeeper measures the sprinter’s time as9.88 seconds. The timekeeper then writes..
A bowling ball weighing 71.2 is attached to the ceiling by a 3.50 rope. The ball is pulled to one side and released; it then swings back and forth like a pendulum. As the rope swings through its lowest point, speed of the bowling ball is measured a..
A long ladder weighing 100 N is rested against a smooth wall. find the magnitude of the normal force of the wall on the ladder
an electric heater plugged into a 115-v ac outlet uses an average electric power of 1200 w. what are the maximum
Consider the circuit made of a R = 100 resistor, voltage source V , and fuse F. The fuse breaks if the instantaneous current in the circuit reaches 1 A. Which of the following voltage sources can be used in the circuit without breaking the fuse?
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