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Only a small amount of the energy used in an incandescent light bulb (regular bulbs commonly used in households) is actually converted into light. What happens to the rest of the energy? How more efficient light bulbs (LEDs for example) are able to waste less energy?
a beam of polarized light with an average intensity of14.8wm2is sent through a polarizer. the transmission axis makes
A parallel-plate capacitor has circular plates with radius 45 centimeter and spacing 1.0 millimeter. Obtain the magnetic field between the plates on the symmetry axis
A 2.0 kg ball tied to a string fixed to the ceiling is pulled to one side by a force to an angle of ? = 33.5°. how large is the force that is holding the ball in position
Determine the minimum cross sectional area the cable shown must have if the allowable stress in the cable is 10,000 psi
Hint: This is a multiple step problem in which you must derive the variables needed (mass and distance under constant acceleration) in step one and then apply those values to the final solution of the problem in step two, that is calculate the wor..
A compressive force of 2.7×104N is exerted on the end of a 24-cm-long bone of cross-sectional area 3.9cm2. By how much will the bone shorten
A camera is equipped with a lens with a focal length of 39 cm. When an object 1.0 m (100 cm) away is being photographed, What is the magnification
A flight attendant pulls her 70 N flight bag a distance of 378 m along a level airport floor at a constant velocity. Find the work she does on the flight bag
A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 6.2 m/s2; How much time is required for the entering car
A) What is the acceleration of the blocks? B) What is the tension in the string?
One end of a cord is fixed and a small 0.500-kg object is attached to the other end, where it swings in a section of a vertical circle of radius 2.00 m. When Θ = 20.0 degrees, the speed of the object is 8.00 m/s. At this instant, discover the tension..
A person is riding a bike, the wheels of a bike have an angular velocity of +18.5 rad/s. Evaluate the angular acceleration of each wheel
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