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For a source charge Q and a test charge q, separated by a distance r, the electric potential energy of the test charge is kQq/ r. If two alpha particles (each has two protons and two neutrons) are 0.5 meters apart, what is the electric potential energy of the system?
If the work function for a metal is 1.8 eV, what would be the stopping potential for light having a wavelength of 400 nm? What would be the maximum velocity of the emitted photoelectrons at the metal's surface?
a battery of emf 10 v and internal resistance 3nbspomega is connected to a resistor. if the current in the circuit is
Two converging lenses having focal lengths of f1 = 11.1 cm and f2 = 20.0 cm are placed d = 50.0 cm apart. The final image is to be located between the lenses, at the position x = 28.3 cm indicated. How far to the left of the first lens should the o..
Calculate the acceleration of a skier heading down a 10.0 deg, slope, assuming the coefficient of friction for waxed wood on wet snow
A student removes a 10.50 kg stereo from a shelf that is 1.802 m high. The amplifier is lowered at a constant speed to a height of 0.75 m. What is the work done by a) person and b) gravitational force that acts on the amplifier.
If the magnetic force exerted on this wire per meter is 3.3×10-2 N , what is the magnitude of the magnetic field? Express your answer using two significant figures.
A 1.0-cm-wide diffraction grating has 1300 slits. It is illuminated by light of wavelength 560 nm. What is the angle (in degrees) of the first diffraction order? What is the angle (in degrees) of the second diffraction order?
The leg and the cast in Fig 4.20 below weigh 220 N (w1). Determine the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus the cast.
Find the rms current in this circuit in the limit of high frequency. Find the rms current in this circuit in the limit of low frequency.
A 400-W immersion heater is placed in a pot containing 2.0 litters of water at 20 C.(a) how long will it take to bring the water to boiling temperature assuming that 80% of the available energy is absorbed by the water?(b) how much longer will it tak..
Using a graph, explain why the tangent line approximation is a good one when x = 4.1 but not when x = 16.
Discuss the types of energy transformations that are involved in the following devices or events. (For example, for (a) striking a match transforms the chemical energy in the match head into thermal (heat) and radiant (light) energy).
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