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A car radio draws 0.11 A of current in the auto's 12-V electrical system.
(a) How much electric power does the radio use?
W
(b) What is the effective resistance of the radio?
Ω
Explain why the electron and positron cannot annihilate to become a single photon. What are the magnitudes of the momenta of the photons?
To weigh a fish, a person hangs a tackle box of mass 3.5 kilogramsand a cooler of mass 5 kilograms from the ends of a uniform rigidpole that is suspended by a rope attached to its center. What is the mass of the fish
Describe how the hydrogen atom might absorb a photon of energy less than 13.6 eV. Describe a process by which a 9.8-eV photon might be absorbed. What about a 15.2-eV photon?
A cylindrical air duct in an air conditioning system has a lengthof 5.5 m and a radius of 7.2 x 10^-2 m. A fan forces air ( n = 1.8x 10^-5 Pa·s) through the duct, such that the air in a room(volume = 280 m^3) is replenished every ten minutes. Dete..
A typical compact disc stores information in tiny pits on the disc's surface. What's the frequency of electromagnetic waves that have a wavelength equal to the typical CD pit size
at a certain point on earths surface in the southern hemisphere the magnetic field has a magnitude of 4.9 10-5 t and
An old trick to find out if a train is coming is to put your ear on the rails of the track. Why is this more effective than just listening for the sounds the train makes in air.
A violinist is tuning her instrument to concert A (440Hz). Now, when she tightens her violin strings slightly she hears 4.00 beats per second. What was the frequency of her violin
A space of 100 cm3 and one of 300 cm3 seperated by a capillary tube, in which a tap is arranged, connected. How big is the pressure in the related areas
Two identical 1.3-kg blocks are connected by a massless string over a frictionless pulley of radius R = 15.000 cm and rotational inertia I = 0.004 kg m2, find the magnitude of the linear acceleration of the two blocks
Find the net force on the Moon (mM = 7.35 × 1022 kg) due to the gravitational attraction of both the Earth mE = 5.98 × 1024, Determine the direction of the net force
Molecules act as tiny springs and have vibration energy and frequency. The frequency of CO molecule is 6.42 x 1013Hz. Calculate the spring constant using the effective mass
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