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An electric dipole consists of charges +2e and -2e separated by 0.99 nm. It is in an electric field of strength 3.6 x 106 N/C. Calculate the magnitude of the torque on the dipole when the dipole mome
Two identical capacitors store different amounts of energy: capacitor A stores 1.4 x 10-3 J, and capacitor B stores 4.7 x 10-4 J. The voltage across the plates of capacitor B is 12 V. Find the voltage
The nickel-metal hydride battery in your cell phone has a 1.2-V emf, and it can be recharged about 1000 times. Manufacturers often rate batteries in milliamphours (mA-h) they can supply between rech
A proton is moving horizontally toward the west in this field with a speed of 6.20 x 10^6 m/s. What are the direction and magnitude of the magnetic force the field exerts on the proton.
A 96 g piece of ice at 0.0°C is placed in an insulated calorimeter of negligible heat capacity containing 100 g of water at 100°C. (a) What is the final temperature of the water once thermal
(a) What potential difference between the two wires would cause a 50-mA current from one hand to the other?
Compute the perpendicular components of a 25 N force applied at an angle of 20 degrees counterclockwise with respect to the right horizontal.
Draw free body diagrams for the following, that is all. a) A 784.8 N weightlifter is standing holding a bar weighing 981 N directly over his head (The unknown external force you should include in th
At what angular velocity will this maximum permitted acceleration be reached? How long does it take to reach this angular velocity?
Given the fact that the resistivity of semiconductors decreases as the temperature increases, is it reasonable to expect there to be some elevated temperature at which the resistance of a semiconduc
Assuming a coordinate system where +y is up, calculate the y-component of the acceleration ay. ay can either be positive or negative depending on the direction of the acceleration.
The skier's mass is 56.5 kg, and the coefficient of kinetic friction between the skis and the snow is 0.112. Calculate the magnitude of the force that the tow bar exerts on the skier.
An elevator (cabin mass 530 kg) is designed for a maximum load of 3300 kg, and to reach a velocity of 3.5 m/s in 3 s. For this scenario, what is the tension the elevator rope has to withstand?
An electric dipole has charges of 4.55pC that are separated by 6.75cm. The dipole lies on the x-axis, its positive end lies on the +x-axis, and its center is at the origin. Located at y = +4.00cm i
The coefficient of static friction between the mug and the roof is 1.3, and the coefficient of kinetic friction is 0.3. What is the maximum acceleration of the car, so the mug does not slide off?
At the Brookhaven accelerator, protons of kinetic energy 33 GeV are made to orbit around a circle of radius 128 m. What magnetic field is required to hold the protons in the orbit?
If the velocity of a 5.0 kg object tied to a string is constant at 30 m/s when traveling in a vertical circle having a radius of 1.40. What must be the minimum strength of the string?
An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges. What is the speed vfinal of the electron when it is 10.0cm from
The electric field strength is 2.00×104 inside a parallel-plate capacitor with a 0.500 spacing. An electron is released from rest at the negative plate. What is the electron's speed when it re
Calculate the total entropy change in the outside air for the same time period. What is the net change in entropy for the system (room + outside air)?
Limit your drawing to the region between the plates, avoiding their edges, and draw the lines for surfaces that are 10.0 V apart, starting at the low-potential plate. I need to know exactly where to
If you heed the sign and slow to 40 mph, what will be your acceleration going around the curve at this constant speed? Give your answer in m/s2 and in units of g.
When a dielectric is inserted between the plates, completely filling the space, the voltmeter reads 12.5 . What is the dielectric constant of this material?
A 17.0-g piece of Styrofoam carries a net charge of -0.75 µC and is suspended in equilibrium above the center of a large, horizontal sheet of plastic that has a uniform charge density on its s
A hockey puck slides off the edge of a table with an initial velocity of 22.0 m/s and experiences no air resistance. The height of the tabletop above the ground is 2.00 m. What is the angle below th