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A 100-W lightbulb has a resistance of about 12 ?when cold (20 ?C) and 156? when on (hot).
Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity?
A 5 kg block sits on a surface with a maximum static coefficient of friction of 0.60. A 10g bullet is fired into the block. How much kinetic energy is dissipated in the bullet/block collision
A spacecraft approaching the earth launches an exploration vehicle. After the launch, What is the speed of the exploration vehicle relative to the spaceship
A man is dragging a trunk up the loading ramp of a mover's truck. The ramp has a slope angle of 20.0 ? , Find the vertical component of the force
A photon Compton scatters off of a stationary electron at an angle of 60 °. Determine the initial wavelength of the photon
A nearsighted patient's far point is 0.723 m from her eyes. What is the distance between her eyes and the glasses
A microscope has an objective lens with a focal length of 16.22 mm and an eyepiece with a focal length of 9.76 mm. what is the actual diameter of the red blood cell
The momentum of a soccer player is 100kg-m/sec and he hits a soccer ball with a mass 0.1 kg, find the speed(velocity) of the soccer ball
Two parallel wires are separated by a distance of 5.00 cm. Each wire carries a current of 2.69 A in the same direction, Is the force attractive or repulsive
A woman on a bicycle traveling at 10m/s on a horizontal road stops pedaling as she starts up a hill inclined at 3.0 degrees to the horizontal
the horizontal and the chair slides along the floor. Using Newton's laws, compute the magnitude of the normal force that the floor exerts on the chair.
How much work should be done to bring 3 electrons from a great distance apart to within 2.55E-10 m from one another (at the corners of an equilateral triangle).
A spaceship is measured to be 120 m long while it is at rest with respect to an observer. If the spaceship now flies past the observer with a speed of .99c, what length would the observer measure of the spaceship.
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