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A transformer has 50 turns in its primary and 250 turns in its secondary. 12-V ac is connected to the primary. What is the output voltage?
A conducting sphere of radius 0.26 m has a potential of 240 V (with V = 0 at infinity). What is the charge density on its surface
A transformer consisting of two coils wrapped around an ironcore is connected to a generator and a resistor. There are 11 turnsin the primary coil and 18 turns in the secondary coil. The peakvoltage across the resistor is 67V. What is the peak emf..
A laser beam travels from air (n=1.002) into glass (n=1.522)and then into gelatin. The incident ray makes a 58 angle with the normal as it enters the glass and a 36.4 angle with the normal in the gelatin. Determine the angle of the refracted ray in..
What is the wavelength of the electromagnetic waves used for cell phone communications in the 900-MHz band?
a flat sheet ofcrown glasshas a thickness of 2.2 cm. it is on top of a flat sheet of crystalline quartz that has a
Mars is 2.28 x 1011 m from the sun (on average). At what minimum speed would it escape from the sun completely
The electric field in a region of space has the components Ey = Ez = 0 and Ex = (5.90 N/(C·m))x. Point A is on the y axis at y = 4.30 m, What is the potential difference (in V) VB - VA
q.1 a driver is driving at 68 mihr on a straight highway. he sees an accident on the road in front of him so he slams
Assume that half the energy of a 1.00-kT nuclear depth charge set off under an aircraft carrier goes into lifting it out of the water-that is, into gravitational potential energy. How high is the carrier lifted if its mass is 90,000 tons?
A 2.5-m^3 cylinder of oxygen (O2) is kept in a machine shop. The oxygen in the tank is kept at a temperature of 80 °C and a pressure of 0.6 MPa. what is the new pressure in the tank
A lumberjack (mass = 98 kilogram) is standing at rest on one end of a floating log (mass = 245 kilogram) that is also at rest. Find the velocity of the second log if the lumberjack comes to rest on it
two forces f1 and f2 are acting on a mass m6.0 kg. the force f1 5.0i 7.0j 2.0k in n. the acceleration of the mass is
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