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When operated on a household 110.0-V line, typical hair dryers draw about 1550 W of power. We can model the current as a long straight wire in the handle. During use, the current is about 2.25 cm from the user's hand.
What is the current in the dryer?
What is the resistance of the dryer?
What magnetic field does the dryer produce at the user's hand?
A large truck collides head-on with a small car. The car is severely damaged as a result of the collision. According to Newton's third law, how do the forces acting between the truck and car compare during the collision?
As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces the window. h is 0.54 m and d is 8.0 m. Assume that the bullet does not slow down as it passes through the window. Evaluate the Distance H
What is the kinetic energy of a carbon atom moving with a speed of 500 m/s.
How fast is the shadow of the plane moving along the ground? (That is, what is the magnitude of the horizontal component of the plane's velocity?)
A man pushes on a piano with mass 180 {rm kg} so that it slides at constant velocity down a ramp that is inclined at 20.0^circ above horizontal floor. Overlook any friction acting on the piano.
A person walks 25.0° north of east for 2.70 km. How far would the person walk due north and due east to arrive at the similar location.
A loudspeaker of mass 25 {rm kg} is suspended a distance of h = 1.60 {rm m} below the ceiling by two cables that make equivalent angles with the ceiling. Each cable has a length of l = 3.50 {rm m}.
A parallel plate capacitor is composed of two square plates, 8.5 cm on a side, separated by an air gap of 1.00 mm, Find the new capacitance
An ideal gas is enclosed in a cylinder that has a moveable piston on top. The piston has a mass of 6200 g and an area of 5 cm2 and is free to slide up and down.
A horse is capable of moving at four different speeds: walk (1.9 m/s), trot (5.0 m/s), canter (7.0 m/s), and gallop (12 m/s). Ann is learning how to ride a horse. She spends 15 minutes riding at a walk and 1.8 minutes at each other speed.
Pick at least two sample cases and for each sample case include both a physical reason you'd expect fo to go up or down (think about how sound waves are squishing together or spreading apart) and a mathematical reason (like will picking a + in the..
While john is travelling along an interstate highway, he notices a 160 mile marker as he passes through town. Later John passes another mile marker, 119.
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