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A phone-charger requires 5.00 V to operate. A transformer allows the device to be powered from an overseas 240 V outlet. If the primary has 480 turns, determine how many turns should be in the secondary. What is the resistance of the phone-charger if it draws a current of 0.25 amp?
) If the pressure of the 2.2-cm3 volume is reduced to 1.2 10-11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
In an attempt to reduce the extraordinarily long travel times for voyaging to distant stars, some people have suggested traveling at close to the speed of light. How fast must the rocket travel relative to earth
Calculate the specific heat of a metal from the following data. A container made of the metal has a mass of 3.8 kg and contains 14 kg of water.
Radius=10m Vt=12.3 If at point A the track exerts a force on the car that is 2.92 × 10^4 N greater than the car's weight, what is the mass of the car.
A person takes a trip, driving with a constant speed of 96.5 km/h, except for a 20.0-min rest stop. The person's average speed is 69.6 km/h. How much time is spent on the trip
The positively charged plate of a parallel-plate capacitor has a charge equal to Q. Find the dielectric constant of the material
Vector A has a magnitude of 11 units at a direction of 255 o, and vector B has a magnitude of 30 units at a direction of 345 o, both gauged with respect to the positive x axis.
A boy uses a slingshot to launch a pebble straight up into the air. The pebble reaches a height of 24.0 m above the launch point 2.3 seconds later, What was the pebble's initial speed
How many homes could be heated with the waste heat
An infinite line of positive charge lies along the y axis, with charge density ? = 1.20 ?C/m. find the magnitude of the net force exerted on the dipole
A 4.0-kg object has a velocity of 4.0 m/s headed east. An explosion causes it to break up into two smaller 2.0-kg objects. what is the velocity of the other object after the explosion
A lady with mass m1 is ice-skating toward the east on a frictionless frozen lake when she collides with a mass of mass m2 who is ice-skating toward the west. Find the maximum force on the man from the lady, including direction
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