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What is the work done by the field on the electron?
A bullet is fired through a board 14.9 cm thick, with a line of motion perpendicular to the face of the board. If the bullet enters with a speed of 381 m/s and emerges with a speed of 219 m/s, what
Water moves through a constricted pipe in steady, ideal flow. At the lower point the pressure is 1.68 105 Pa and the pipe radius is 2.90 cm. At another point 2.50 m higher, the pressure is 1.25 105
(a) Find the power the toaster converts when it is at its operating temperature. . W (b) What is the final temperature of the heating element?
If both collars weigh .75 lb, determine the normal force which the curved rod exerts on one collar at the instant theta=120 degrees. Neglect friction.
Suppose the temperature of the cosmic background were 1.3 K. What would be the wavelength of maximum intensity? What would be the frequency of the EM wave at maximum intensity? What would be the tem
An air gap capacitor is charged up to 10 V and then disconnected. If a material is added to the gap between the plates and the voltage drops to 3.33 V, what is the dielectric constant of that materi
The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.27 ?. a) What length is required? b) What will be the diameter of the wire?
A 9.00-V battery delivers a current of 1.22 A to the lightbulb filament of a pocket flashlight. (a) How much charge passes through the filament in 1.70 min?
A 2.0-nF parallel plate capacitor with a sheet of mylar (k = 3.1) filling the space between the plates is connected to a 90 V battery. While it is still connected to the battery, the sheet of mylar
When two charges are separated by a distance d, their electric potential energy is equal to U. What would be their electric potential energy if the separation distance was d/2?
A 120 g copper calorimeter cup contains 220 cm3 of water and 35 g of ice, all in thermal equilibrium. A 185 g piece of iron is heated to a high temperature and dropped into the water (assume no wate
At a price of $0.10 per kilowatt-hour for electrical energy, what is the cost (in dollars) of operating the oven?
A brass cylindrical bar at 300 K has a diameter of exactly 40 mm. An aluminum ring has an inner diameter which is exactly 15 \mu m too small to fit over the brass cylinder. A) To what temperature do
(a) How many atoms of helium gas fill a spherical balloon of diameter 31.0 cm at 18.0°C and 1.00 atm? (b) What is the average kinetic energy of the helium atoms?
Take the specific heat of liquid water to be 4190J/kg x K , the specific heat of ice to be 2100 J/kg x K, and the heat of fusion for water to be 3.34×105J/kg .
An object that is 5 cm in height is placed 30 cm in front of a converging lens with a focal length of 15 cm. What is the image height? Show steps and work for solving and you'll get 5 stars.
A surface is so constructed that, at all points on the surface, the vector points outward. Therefore, it can be said that
A positive point charge Q is located at x=a and a negative point charge -Q is at x=-a. A positive charge q can be placed anywhere on the y-axis. Part A Find an expression for (F_net)_x , the x-comp
The mercury level to rise 250mm in the tube attached to the venturi. b, What is the flow of gasoline (77degree F) that will cause the mercury level to rise 200mm in the tube.
A 9-V battery is connected across a capacitor of 20 µF through a switch which is initially open. The amount of charge that flows from the battery to the capacitor when the switch is closed is
Helium (He), a monatomic gas, fills a 0.033 m3 container. The pressure of the gas is 5.5 × 105 Pa. How long would a 0.25 hp engine have to run (1 hp = 746 W) to produce an amount of energy eq
A particle of charge Q is fixed at the origin of an xy coordinate system. At t = 0 a particle (m = 0.995 g, q = 2.33 µC is located on the x axis at x = 21.3 cm, moving with a speed of 33.0 m/s