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Consider a single turn circular loop of radius 20 cm. a) At what point along the axis is the magnetic field 1% of that at the center? b) Find the current in the plane of the loop required to cancel
The change in momentum depends upon the change in the position of the object. The change in momentum depends upon the time interval during which the force acts. The change in momentum depends upon t
A lump of putty and a rubber ball have equal mass. Both are thrown with equal speed against a wall. The putty sticks to the wall. The ball bounces back at nearly the same speed with which it hit the
500 cm3 of ideal gas at 40 oC and 200 kPa absolute pressure is compressed to 250 cm3 and cooled to 20 oC. What is the final absolute pressure?
If a 4.0-N force is applied to the plunger and the diameters of the plunger and the needle are 1.2 cm and 2.5 mm, respectively, what force is needed to prevent fluid flow at the needle?
A wooden ball is tied to the bottom of a swimming pool by a string. What is the tension in the string if the ball's diameter is 0.15 m and its mass is 144 g? The water in the pool is fresh water, 10
In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 2.4 x 106. One pulse is delivered every
(a) What is the greatest voltage that the battery can have without one of the resistors burning up? (b) How much power does the battery deliver to the circuit in (a)?
If a car goes over a hill at a speed of 20 m/s, what is the size of the normal force felt by a 60 kg passenger in the car at the very top of the hill? Approximate the hill as a circle with a radius
As the current is going from 10 A in one direction to 10 A in the other, in which direction is the induced current in this side of the square coil nearest to the straight wire?
What is their speed after the collision? What is the force of the clay on the block during the collision? What is the force of the block on the clay?
If the block slides at constant velocity, what is the work done by friction as the block moves 2.0 m across the table? Give your answer in Joules to three significant digits.
A box slides down a rough, 50o incline with a coefficient of kinetic friction between the box and incline of 0.8. At a distance of 0.8 m from the bottom the box is moving at 1.2 m/s. What will be it
The 1.0 kg block in the figure is tied to the wall with a rope. It sits on top of the 2.0 kg block. The lower block is pulled to the right with a tension force of 20 N. The coefficient of kinetic fr
A laser beam with a wavelength of 524 nm is exactly perpendicular to a screen having two narrow slits spaced 0.150 mm apart. Interference fringes, including a central maximum, are observed on a view
By how much does the rocket's velocity change during this interval?
A block weighing 72.5 N rests on a plane inclined at 25.0° to the horizontal. A force F is applied to the object at 45.0° to the horizontal, pushing it upward on the plane. The coefficients
A solenoid used to produce magnetic fields for research purposes is 2.5m long, with an inner radius of 30cm and 1200 turns of wire. When running, the solenoid produced a field of 1.1T in the center
A dirt bike racer is going up a 45o slope. He and the dirt bike have a combined mass of 184 kg, and the knobby tires give a coefficient of friction of 0.5. The driven wheel produces a force of 3000
Assuming no transfer of heat to or from the surroundings, what is the final temperature (in degrees C) of the system?
One positive charges and one negative charge, both of the same magnitude, are near each other. If we double the amount of charge on both of them while simultaneously doubling the distance between th
A large conducting ball with mass 3 kg has a net charge of +50 C. A smaller conducting ball with mass 2 kg has a net charge of +10 C. You touch the surfaces of the two together. What is the final di
At one instant, the center of mass of a system of two particles is located on the -axis at = 2.0m and has a velocity of (5.0m/s ) . One of the particles is at the origin. The other particle has a m
Two sinusoidal waves with the same amplitude A and frequency f travel in opposite directions along a long string. You stand at one point and watch the string. What is the maximum displacement of the