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Two small plastic spheres, one charged to -25 nC and the other to +25 nC , are connected by a 28-mm-long insulating rod. Suppose this dipole is placed in a uniform electric field with strength 7.4 * 10^5 N/C. What is the maximum possible torque on the dipole?
Calculate the speed of a proton with a kinetic energy of 1.48 eV, Find the speed of an electron that has a kinetic energy of 1.48 eV. 1 eV = 1.602 × 10^?19 J
In the lungs there are tiny sacs of air that are called alveoli. An oxygen molecule (mass = 5.30 x 10-26 kg) is trapped within a sac, and the uncertainty in its position is 0.140mm. What is the minimum improbability in the velocity of this oxygen ..
The mass of a robot is 5220 kg. This robot weighs 2650 N more on planet A than it does on planet B. Both planets have the same radius of 2.26 × 107 m
An electrical motor can accelerate a ferris wheel whose moment of inertia is 20,000 kg-m^2 from rest to 10 rev/min in 12 sec. When the motor is turned off, the ferris wheel slows down from 10 to 8 rev/min in 10 sec due to frictional losses.
A flagpole of length 9 m and mass 35 kg is hinged at one end, where it is connected to a wall as sketched below. The pole is held up by a cable attached to the end. Find out the tension in the cable. (Assume the flagpole has an uniform mass distr..
A meter stick lies on the bottom of a 100 cm long tank with its zero mark against the left edge. You look into the tank at a 30 angle, with your line of sight just grazing the upper left edge of the tank.
Astronaut Ann wishes to travel from one side of her spaceship to the other side so she pushes herself away from a wall, What is Ann's speed relative to Bob as she drifts across the spacehip
A hair dryer has a power rating of 1400 W at 110 V rms. Assume the hair dryer circuit contains only resistance. What is the rms current drawn by the hair dryer
The speed of a transverse wave on a string is 450 m/s and the wavelength is 0.18 m. The amplitude of the wave is 2mm. How much time is necessary for a particle of the string to move through a total distance of 1 km.
The speed of a longitudinal wave in a mixture of helium and neon at 300k was found to be 758m/s. what is the composition of the mixture
A particle with a positive charge 2e moves with a velocity V= (2i + 3j - k) m/s through a region where both a uniform magnetic field and a uniform electric field exist. Calculate the total force on the moving particle
At an accident scene on a level road, investigators measure a car's skid mark to be 68-m long. It was a rainy day and the coefficient of friction was estimated to be 0.38. Make use of these data to determine out the speed of the car when the drive..
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