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The rms current through a light bulb is 0.947 A when the bulb is connected to a standard120 V rms source..
a) Find the bulb's resistance.b) Find the peak instantaneous current.c) Find the peak instantaneous voltage.d) Find the average electrical power used by the bulb.
A uniform 1.7-kg rod that is 0.97 m long is suspended at rest from the ceiling by two springs, one at each end. Both springs hang straight down from the ceiling. The springs have identical lengths when they are unstretched. Their spring constants are..
A hunk of aluminum is completely covered with a gold shell toform an ingot of weight 45.0 N. What is the weight of the goldin the shell
Darius the dare devil plans to launch his rocket carat the top a ramp inclined at 20.0 degrees to the horizontal over apit of fire 20 m in diameter, unfortunately the rocket motor failsat the foot of the ramp, when his speed is 12.6 m/s.
A uniform ladder of mass m and length l leans at an angle θ against a frictionless wall, determine a formula for the minimum angle at which the ladder will not slip
A person is performing a knee extension exercise with a 100 N weight acting at the ankle. What is the torque at the knee necessary to maintain a knee joint angle of -60q relative to the right horizontal passing through the knee joint
One 20-year-old twin brother takes a space trip with a speed of 0.80c for 30 years according to a clock on the spaceship. Upon returning to the Earth, what is his own age and the age of the Earth-based twin brother?
Glycerine in water diffuses along a horizontal column that has a cross-sectional area of 1.9 cm2. The concentration gradient is 2.8 10-2 kg/m4, Determine the diffusion coefficient
A 1.2kg block is dropped from 48 cm above a spring in equilibrium. Calculate the maximum compression in the spring
A 658-kg boulder is dropped into a mine shaft that is 2.1 x 103 m deep. During the boulder's fall, the system consisting of the Earth, Determine the binding energy (in Joules) of the Earth-boulder system
A simple circuit is set up that only consists of a 12 V battery connected to a light bulb with a resistance of 9 Ohms. What current flows through the light bulb
A Ping Pong ball is a hollow, air-filled sphere. One such Ping Pong ball has a radius of 2.25 cm and a mass of 3.5 g. When the ball is placed a few centimeters below the surface of body of fresh water and released, the ball will accelerate upwards
A 0.2 object is swung in a vertical circular path on a string 0.1 m long. The acceleration of gravity is 9.8 m/s^2. If a constant speed of 4.07 m/s is maintained, what is hte tension in string when the object is at the top of the circle? Answer in..
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