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A parallel-plate capacitor has an area of 5.40 cm2 and the plates are separated by 1.20 mm. The capacitor stores a charge of 387.0 pC. The permittivity of a vacuum is 8.85419 × 10-12 C2/N &midd
Assuming 90 percent of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°C.
Ball A is dropped from the top of a building of height h at the same instant that ball B is thrown vertically upward from the ground. When the balls collide, they are moving in opposite directions,
The height of the cliff is 6.69 m. The stones are thrown with the same speed of 8.49 m/s. Find the location (above the base of the cliff) of the point where the stones cross paths.
If the speed of the train is 79 km/h, how long does it take the car to pass the train? How far will the car have traveled in this time?
The first place is between the charges and is 5.0 cm to the left of the negative charge. The second place is 5.8 cm to the right of the negative charge.(a) What is the distance between the charges?
(a) Find the magnitude and direction of the electric force that acts on the particle. (b) Find the magnitude and direction of the electric field that the particle experiences.
An electron moves at right angles to a magnetic field of 0.10 . What is its speed if the force exerted on it is 8.7×10-15 ?
Their handles are insulated to prevent injury to the operator, who calls. "Clear!" and pushes a button on one paddle to discharge the capacitor through the patient's chest. Assume an energy of 330 W
A gold wire and a tungsten wire of the same length have the same resistance. What is the ratio of the diameter of the gold wire to that of the tungsten wire.
The helicopter and the sensor both move only in the horizontal direction and have a horizontal acceleration of magnitude 2.73 m/s2. Ignoring air resistance, find the tension in the cable towing the
An observer on the train, however, sees the drops fall perfectly vertically. Determine the speed of the raindrops relative to the ground.
Suppose an astronomer decides he wants to know the average orbital speed of Eris the dwarf planet. Using mechanical and astrophysical theories as well as observations, he determines that is average
King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 42 m/s and an angle of 26°. A cannonball that was accidentally dropped hits the moat b
A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. The plane flies 158 m above the glacier at a speed of 169 m/s. How far short of the target should it d
How much farther did the ball travel on the moon than it would have on earth? For how much more time was the ball in flight
A ball thrown horizontally at 26.26 m/s travels a horizontal distance of 38.45 m before hitting the ground. From what height was the ball thrown?
Two spheres are launched horizontally from a 1.49-m-high table. Sphere A is launched with an initial speed of 5.2 m/s. Sphere B is launched with an initial speed of 2.99 m/s. What is the time for f
A piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but as they walk away, it begins to roll down the ramp.
The electric potential energy stored in the capacitor of a defibrillator is 56 J, and the capacitance is 130 µF. What is the potential difference across the capacitor plates?
An empty parallel plate capacitor is connected between the terminals of a 8.92-V battery and charges up. The capacitor is then disconnected from the battery, and the spacing between the capacitor pl
A parallel-plate capacitor is charged to a potential difference of 120V. The area on each plate is 120cm^2 and the spacing between plate is 0.5mm. Find the electric field between the two plates.
An electron is initially at rest in a uniform electric field of intensity 1400 N/C. Find the following: a) its acceleration in the electric field
The electric potential at points in an xy plane is given by V = (1.6 V/m2)x2 -(3.5 V/m2)y2. What are (a) the magnitude of the electric field at the point (3.7 m, 2.5 m) and (b) the angle that the fi
It then sails from the second island to the third island in a direction 74.0° west of north. Finally, it returns to the first island, sailing in a direction 28.0° east of south. (a) Calculat