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A 0.52 gram oil droplet with charge +5.9 × 109 C is in a vertical E field. Find what magnitude should it have thus that the droplet moves at constant speed?
Sunlight strikes a piece of crown glass at an angle of incidence of 30.0 degrees. Calculate the difference in the angle of refraction between a red (660.0 nm) and a blue (470.0 nm) ray
A volltage drop of 0.00039 V is measured across a 1.2 m long piece of copper wire when 10 mA of current passes through it. What is the resistivity of copper
The driver of a car wishes to pass a truck that is traveling at a constant speed of 20.9m/s . Initially, the car is also traveling at a speed 20.9m/s and its front bumper is a distance 23.1m behind the truck's rear bumper, What is the final speed ..
a 70-kg stunt pilot pulls out a drive while flying at 50 ms. if he flies a circular path with a radius of 200 m what
A high-voltage transmission line with a resistance of 0.28 omegacap.gif/km carries a current of 1040 A. What fraction of the transmitted power does this loss represent
a moving 4.30 kg block collides with a horizontal spring whose spring constant is 346 nm.a the block compresses the
A 0.99-cm-diameter microscope objective has a focal length of 2.6 mm. It is used in visible light with a wavelength of 532 nm. What is the objective's resolving power if used in air
q1. a school bus takes 0.89 h to reach the school from your house. if an average velocity of the bus is 21.1 kmh to the
A 2.00 m brass rod with a 1.00 mm diameter is used as a spring by stretching the rod. If the tensile modulus of brass is 9.10 1010 N/m2, then the spring constant of the rod is
a heat engine has an efficiency of 65.0% and receives 150 J of heat per cycle. How much work does it perform in each cycle
A .20-kilogram ball is released from a height of 10m above the beach; the impression the ball makes in the sand is 5.0cm deep while the ball stops uniformly.What is the force acting on the ball by the sand?
A 10-cm-long thin glass rod is uniformly charged to 50 nC. A small plastic bead, charged to - 5.4nC , is 4.5 cm from the center of the rod. What is the magnitude of the force on the bead? (N)
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