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The electric potential energy stored in the capacitor of a defibrillator is 110 J, and the capacitance is 120 ?F. What is the potential difference across the capacitor plates?
A lamp that plugs into a 120V wall socket can use either a 60W or 100W bulb. Which bulb has the higher resistance
A 9.0 V battery is connected across two large parallel plates that are separated by 4.5 mm of air, creating a potential difference of 9.0 V between the plates. What is the electric field in the region between the plates
Some believe that the positions of the planets at the time of birth influence the newborn. Calculate the gravitational force exerted on the baby by the planet Jupiter (m=1.9*10^27 kg) at its closest approach to the earth
A wire of radius 1.5 mm carries a current of 2.8 A. The potential difference between points on the wire 20 m apart is 4.7V. determine the electric field in the wire
At a given time, t_0, sample A contains 750,000 radioactive nuclei. During the 1 hour before t_0, a total of 280,000 decays were observed from this sample. Calculate the half-life of the radioactive material
Two charged particles, Q1 = +4.90 nC and Q2 = -2.80 nC, are separated by 36.0 cm. What is the electrical potential energy of the pair
a 90 ohm resistor has a current of .6A and is connect in series with a 150 ohm resistor. What is the emf of the battery to which the resistors are connected
How much energy transfer as the reason of a temperature difference was there from the stove into the system consisting of the water plus the pan.
If the intensity of the electromagnetic radiation produced by the Sun is about 1.4 kW/m2 near the Earth, what size would a sail have to be to accelerate a spaceship with a mass of 11.9 metric tons at 1.39 m/s2
a 18 cm tall object is placed in front of a concave mirror with a radius of 26 cm. the distance of the object to the mirror is 74 cm. Calculate the magnitude of the image height
you are given a 5-loop standing wave. The velocity of the wave of the string is v= 10 m/s. What is the frequency of the wave on the string
A 12.00 kg block on a horizontal frictionless surface is attached to a light spring (force constant = 0.80 kN/m). The block is originally at rest at its equilibrium position when a force (magnitude P = 80 N) acting parallel to surface is applied t..
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