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Company's main competitor has built an extremely efficient transformer and is trying to market it saying that the new transformer is able to step up energy. Do you agree with their statement? What would you say?
Power transmission lines generally operate and high voltage and low current. Discuss the reason for this choice. If visible light and radio waves are both examples of electromagnetic waves, why can't we see radio waves? Why spy cameras in satellites and high-altitude aircraft are designed with large apertures?
a 1.50 kg snowball is fired from a cliff 13.0 m high. the snowballs initial velocity of 14.0 ms directed 41.0deg above
A rectangular coil with dimensions of 8.0 cm×10 cm is dropped from a zero magnetic field position to a 1.4 T magnetic field in 0.10 s. What is induced emf in the coil as a result of this
An astronaut is traveling in a space vehicle that has a speed of0.455crelative to Earth. The astronaut measures his pulse rate at69.5per minute. What pulse rate does the Earth observer measure
Consider a cloud that, when viewed from a point on the surface, occupies the portion of the sky defined by: pi/4
During 9.73 seconds a motorcyclist changes his velocity from v1,x = -35.5 m/s and v1,y = 12.5 m/s to v2,x =-21.1 m/s and v2,y = 27.5 m/s. Find the components of the motorcycle\'s average acceleration during this process, aav,x and aav,y.
X rays with a wavelength of 0.18 nm undergo first-order diffraction from a crystal at a 74 degree angle of incidence
A converging lens has a focal length of 6.0 centimeter. A 1.2 centimeter high arrow is located 9.5 centimeter from the lens with its lowest point 4.2 centimeter above the lens axis. Determine the position of the image
a girl uses a jump rope made of flexible wire. she holds the ends of the rope in extended hands, What is the amplitude of oscillation of this alternating emf
A heat engine has a useful work output of 4.0 kJ and expels 8.0 kJ of exhaust energy in each cycle. what is the engine's thermal efficiency
The skater farthest out has a mass of 58.0 kg and is 7.80 m from the pivot. He is skating at a speed of 6.40 m/s. Find out the magnitude of the centripetal force that acts on him.
A golf ball of mass 0.045 kg is hit off the tee at a speed of 32m/s. Find the average force exerted on the ball by the golf club
An astronaut travels to an alternate universe that contains infinite charged plane and no other charged objects. The astronaut observes that the electric field in this universe has a magnitude of 1.20 N/C everywhere and points directly away from the ..
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