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The filament in an incandescent light bulb is made fromtungsten. The light bulb is plugged into a 60 V outlet and draws a current of 1.12 A. If the radius of the tungsten wire is0.006 mm, how long must the wire be?
Two identical conducting small spheres are placed with their centers 0.395 m apart. Find the electric force exerted by one sphere on the other
A He-Ne laser beam with an intensity of 1.00 103 W/m2 is incident from air to dense flint, Find the intensity of the beam transmitted into the dense flint
A 325-N force accelerates a 50.0-kg crate from rest along a horizontal frictionless surface for a distance of 20.0 m as shown in the figure. How much work is done on the crate? What is the final speed of the crate?
A 1400 kg block is lifted at a constant speed of 4 cm/s by a steel cable that passes over a massless pulley to a motor-driven winch. What force must be exerted by the cable
consider a conical pendulum that consists of a bob on one end of a string of negligible mass with the other end of the
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 34.0 dB. What is the intensity delivered to the eardrum
A person undergoing radiation treatment for a cancerous growth receives an absorbed dose of 1.8 Gy. All the radiation is absorbed by the gowth. Determine the rise in temperature
When you drop two balls at once, why doesn't only one marble come off the end twice as fast? Write down the kinetic energy of one marble with mass m and velocity 2v
A 24kg projectile is moving at 240m/s in the positive direction of the x axis when it explodes and divides into two fragments, What is the direction and speed of the other piece
What is the maximum distance the center of the coin can be placed from the axis if the turntable rotates at 47.9 rev/min
a 100 lb cart is placed on a ramp inclined at 15degrees. a horizontal force is applied to the cart to keep it from
A 1500 car traveling at 11 suddenly runs out of gas while approaching the valley shown in the figure. The alert driver immediately puts the car in neutral so that it will roll. What will be the car’s speed as it coasts into the gas station on the oth..
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