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an ideal transformer steps down 120 volts to 12.0 volts and the 2630- turn secondary supplies 12.0 amperes. Determine the current in the primary. Determine the turns ratio. What is the ratio output power to input power.
A bomb is designed to explode 2.00 s after it is armed. The bomb is launched from earth and accelerated to an unknown final speed. What is the final speed of the bomb just before it explodes
A mass (3kg) on a string lies on a horizontal frictionless surface tied to a central point. How fast can the mass move around the circle without breaking the string
Many people mistakenly believe that the astronauts that orbit Earth are "above gravity." Calculate g for space shuttle territory 150 km above Earth's surface. suppose Earth's mass is 6.0 1024 kg, and its radius is 6.38 106 m (6380 km). Your answer..
A cart of mass 6.8 kg is moving with a velocity of 15.2 m/s. It makes a head-on perfectly inelastic collision with a stationary cart B with mass 6.4 kg causing them to travel with the velocity 7.63 m/s. What is the velocity of cart B.
A performer, seated on a trapeze, is swinging back and forth with a period of 9.95 s. what will be the new period of the system
a superball with mass equal to 50 grams is dropped from a height of 1.5m . It collides with a table, then bounces up to a height of 1m. Find the y component of the momentum of the ball immediately before the collision
Find the difference in decibel levels β1 & β2 of a sound source is related to the ratio of its distances r1 & r2 and find the average power generated by the horn.
A useful model of a water molecule is sketched in the figure below, with point charges of 5.2 10-20 C at the H sites, What is the total electric potential energy of this model of a water molecule
A wire carries a current of 0.665 A. This wire makes an angle of 55.5° with respect to a magnetic field of magnitude 4.92E-5 T, What is the length of the wire
An object with a mass of m = 5.3 kg is attached to the free end of a light string wrapped around a reel of radius R = 0.255 m and mass of M = 3.00 kg, Determine the speed with which the object hits the floor
The triangular loop of wire in the drawing carries a current of I= 6.91 A. A uniform magnetic field is directed parallel to the side AB of the triangle and has a magnitude of 2.77 T.
A 12.0-{rm kg} box resting on a horizontal, frictionless surface is attached to a 5.00-{rm kg} weight by a thin, light wire that passes over a frictionless pulley). The pulley has the shape of a uniform solid disk of mass 2.40 {rm kg} and diameter 0...
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