Why doesn't a transformer work with direct current? why is ac required?

How long will a trip take in hours of you travel 450kmat an average speed of 80 km/hr

A ball traveling with an initial momentum of 5.1 kgm/s bounces off a wall and comes back in the opposite direction with a momentum of - 4.3kgm/s. What is the change of momentum of the ball? What impulse is required to produce this change?

An 7 kg airplane is banking through a circle of radius 5.6 m. If the centripetal force on the plane is 20 N, what is the tangential velocity of the plane?

For a cosine function with amplitude A=0.75 and period T=10, what is y (4) ?

The cost of energy delivered to residences by electrical transmission varies from $0.070/kWh to $0.258/kWh throughout the United States; $0.110/kWh is the average value. Required: At this average price, calculate the cost of: a.

The magnitudes of the vertical and horizontal components of a vector are 11 and 17 centimeters respectively. Find the magnitude of the vector and the angle from the horizontal axis.

A rectangular coil with sides 0.10 m by 0.25 m has 500 turns of wire. It is rotated about its long axis in a magnetic field of 0.58 T directed perpendicular to the rotation axis.

Stars set about how many minutes earlier each day? A. 8 B. 6 C. 4 D. 2

Whose atomic theory explains how atoms emit and absorb light

Closed clusters are groups of closely grouped stars that are located along the spiral disk of a galaxy. a. True b. False