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A cyclist travelling at 5.0 m/s uniformly accelerates up to 10 m/s in 2.0s. Each tire of the bicycle has a radius of 35 cm, and a small pebble is caught in the tread of one of them.
(a) Find the angular acceleration of the pebble through those 2 seconds?
A straight 2.00-m, 150-g wire carries a current in a region where the earth's magnetic field is horizontal with a magnitude of 0.55 gauss. a) What is the minimum value of the current in this wire so that its weight is completely supported by the m..
The one-dimensional parity operator pi is defined by pi psi (x) = psi (-x) In other words, pi changes x into –x everywhere in the function. Is pi a Hermitian operator?
A portable DVD player is operated by rechargeable batteries. The batteries are recharged by a unit that plugs into a wall socket. What voltage is used to drive the DVD player
The motor of a ski boat generates an average power of 5.94 × 104 W when the boat is moving at a constant speed of 18.8 m/s. What is the tension in the tow rope that is pulling the skier
A boat takes 4.00hours to travel 5km down a river, then 5.00 hoursto return. How fast is the river flowing
A 9300 kg boxcar traveling at 20m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 10 m/s. What is the mass of the second car.
A patients blood pressure is measured as 140 / 80, measured in level with the heart. What would you expect the blood pressure to be at the top of the head if there is a 45cm height difference in the two points. Density of blood is 100kmm-3. Give r..
An asteroid in an elliptical orbit about the sun travels at 1.3 106 m/s at perihelion (the point of closest approach) at a distance of 2.2 108 km from the sun
A small 12.3g plastic ball is tied to a very light 26.6cm string that is attached to the vertical wall of a room. A uniform horizontal electric field exists in this room. Find the magnitude of the electric field in the room
What is the minimum amount of electrical energy required by the refrigerator to carry out this process if it operates between reservoirs at temperatures of 20.0 °C and –20.0 °C?
A ball (m= .450 kg) is placed at the top of a ramp 1.00 m high. what is the ball's velocity at the bottom of the ramp
An LC circuit has zero resistance, no battery, a capacitor C=66microFarads, and an inductor L=0.7H connected in a simple loop. The capacitor and inductor store a compined total energy of U=24microJoules. What is the maximum magnetic field inside th..
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