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Two point like identical positive charges, all of mass .3 g are suspended as a pendulum and placed in the uniform electric field of a magnitude E=5*10^5 N/C directed upward. A length of a string is 30 cm. What is the magnitude of all charge?
A 100 g cube of ice at 0 degrees C is dropped into 1.3 kg of water that was originally at 82 degrees C. find the final temperature of the water after after the ice melts
The acceleration of gravity is 10 m/s2. What is the acceleration of a 39 kg pail of cement that is pulled upward (not sideways) with a force of 421 N? Answer in units of m/s2.
An uncharged metal slab has square faces with 12 cm sides. It is placed in an external electricfield that is perpendicular to its faces. The total charge inducedon one of the faces is 1.2 nC. What isthe magnitude of the electric field?
In the standing wave experiment, the length of the string is 1.400 m. When a mass of 80 grams is hung, the 7th harmonic is obtained. find the frequency of the vibrator
A crate of mass 11.5 kg is pulled up arough incline with an initial speed of 1.50 m/s. The pulling forceis 100 N parallel to the incline, which makes an angle of16.0° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate..
An extension cord made of two wires of diameter 0.129 {rm cm} (no. 16 copper wire) and of length 1.5 m (5 ft) is connected to an electric heater which draws 13.5 A on a 120-{rm V} line. How much power is dissipated in the cord.
Long parallel wires separated by 7.5 cm carry 3.3 Amperes each in opposite directions. What magnetic force per length acts on the wires
An object moving with uniform acceleration has a velocity of 16 cm/s in the positive x direction when its x coordinate is 3 cm. If its x coordinate 1 s later is -5 cm, what is its acceleration.
the central maximum for 500nm light shown through a single slit has an angular width of 15 degree. what is the width of
A particle travels around a circle of radius 2.0 m making one complete revolution every 2.0 m/s. What are the particle's tangential speed and its angular speed
An object is 5.7 cm from a spherical concave mirror. If the image is 4.7 cm tall and 10 cm from the mirror, how tall is the object
A uniform magnetic field of 25 mT magnitude points into the page. The wire is 1.4m long and straight, but has a loop smack in the middle. Calculate the amount of voltage induced if measured at the ends of the wire
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