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A neon sign uses a step up transformer with a turns ratio of 50. the sign is plugged into a standard wall outlet at 120V. what voltage gets supplied to the sign?
Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. What is the bearing's impact velocity
A grocery sack can withstand a maximum of 310 N before it rips. Will a bag holding 20.0 kg or groceries that is lifted from the checkout counter at an acceleration of 5.5 hold?
A car initially traveling at 24.3 m/s undergoes a constant negative acceleration of magnitude 1.40 m/s2 after its brakes are applied. What is the angular speed of the wheels when the car has traveled half the total distance
An airplane has a mass of 1.40 104 kg, and each wing has an area of 33.0 m2. Determine the pressure on the upper wing surface
Assume a billiard ball is a solid sphere. Its radius is 3 cm and mass is 500 grams. The coefficient of static friction between the ball and the surface is .70. a) Where should you hit the ball so that it experiences pure rolling motion without the..
Scientist develop a new heat lamp to keep chicks warm in an incubator. It has a conversion efficiency of 6.5% of its input to radiant energy. how much radiant power does it output
A student in an undergraduate physics lab is studying Archimede's principle of bouyancy. The student is given a brass cylinder and using a triple beam balance finds the mass to be 1.25 kg
A laser beam shines straight up onto a flat, black foil with a mass of 23.0 ?g. What laser power is needed to levitate the foil
Two sleds are hooked together in tandem . The front sled is is twice as massive as the rear sled. Determine the ratio of the magnitude of the two forces.
A bomb explodes into three identical pieces. One flies in the + y-direction at 12.5 m/s , a second in the - x-direction at 15.4 m/s. What's the direction of the velocity of the third piece
Monochromatic light falls on a slit that is 3.50 multiplied by 10-3 mm wide. what is the frequency of the light used
Three athletes are tugging on a ring. Martha pulls with a force of 150 N in the northerly direction. Eveylyn pulls with a force of 100 N in the easterly direction. Sara pulls with a force of 200 N in the southwesterly direction (225 degrees clockw..
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