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Question1
A step-up transformer has 270 turns on its primary coil and 90,000 turns on its secondary coil. The EMF of the generator to that the primary circuit is attached is 60.0 V.
a) what is EMF in the secondary circuit.
b) The current in a secondary circuit is 0.50 A. What current is in a primary circuit?
Question2
A hanging wire has a length of 1.90. When a steel ball of mass 57.0 is suspended from the wire, the wire stretches by 1.90 if the ball is pulled down a small additional distance and released, at what frequency will it vibrate? Suppose that tension on the wire is less than proportional limit.
A duck flying horizontally due north at 14.8 m/s passes over Atlanta, What is the magnetic force acting on the duck
A lens for a 35-mm camera has a focal length given by f = 54mm, What is the magnification of the image on the film
A submarine on the ocean surface receives a sonar echo indicating an underwater object. What is the object's depth
Thor throws his war hammer at an 1800 kg car initially at rest and it becomes embedded within it. with what speed do the car and hammer move just after the collision
A sample of a material has 40000 radioactive particles in it today. Your grandfather measured 80000 radioactive particles in it 60 years ago. how many radioactive particles will the sample have
The diameter of the aluminum cylinder is measured to be: (4.935 ±0.003)cm. The hanging mass (paint bucket and 5kg) for a Mechanical Equivalent of Heat experiment is recorded as (5.2977 ±0.0002)kg. Calculate the work done cranking the aluminum cylin..
Six grams of helium (molecular mass = 4.0 u) expand isothermally at 320 K and does 9000 J of work. determine the ratio of the final volume of the gas to the initial volume
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. He notes that it takes the wave 0.795 s to reach the opposite tower, 20.0 m away. If a 1 meter length of ..
A large metal ring has a radius of 0.30 m and a mass (uniformly distributed) of 2.5 kg. The ring hangs from a nail as shown. What is the rotational inertia of this object
What is the speed of the large cart after the impact.
Her speed when she is above the bar is 1.3 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and find out her altitude as she crosses the bar.
A marble moving 1.48 m/s rolls off the top edge of a 125. cm high table. How far from the base of the table did it strike the floor
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