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Compute what is the diameter (to the nearest tenth of an mm) of a tungsten wire that has the same resistance as a copper wire of the same length? The diameter of the copper wire is 5.4 millimeter.
Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane of 60 degrees and the other is hanging over the top edge of the plane. what is the value of kinetic friction
In the absence of air resistance, a projectile is launched from and returns to ground level. It follows a trajectory similar and has a range of 26 m. Suppose the launch speed is doubled, and the projectile is fired at the same angle above the grou..
A speedboat moving at 35.0 m/s approaches a no-wake buoy marker 100 m ahead. How long does it take the boat to reach the buoy
An object is subject to a restoring force F = 8x3, How much work must be done to move the object from x = 0.10 to x = 0.47 m
You are in a hot air balloon (yes, another balloon problem!) rising from the ground at a constant velocity of 2.70 m/s upward. To celebrate the takeoff, you open a bottle of champagne, expelling the cork with a horizontal velocity of 4.00 m/s rela..
steel train rails are laid in 12m long segments placed end to end. the rails are laid on a winter day when their
suppose a photon is equally likely to be found anywhere in an interval of 18.6 cm along the x-axis. what is the minimum
A spacecraft is in orbit around a planet. The radius of the orbit is 2.9 times the radius of the planet (which is R = 71451 km), What is the period of the spacecraft's orbit
A mouse travels along a straight line; its distance x from the origin at any time t is given by the equation x = (8.5cm x s^-1)t - (2.5cm x s^-2) t2. Find the average velocity of the mouse
A motor has coils with a resistance of 28 and operates from a voltage of 241 V. When the motor is operating at its maximum speed, the back emf is 141 V. Find the current in the coils when the motor has reached maximum speed
A soccer player kicks the ball toward a goal that is 27.0 m in front of him. Find the speed of the ball when the goalie catches it in front of the net
When a 9.36 kg block is placed on top of avertical spring, the spring compresses 4.03 cm. Find the force constant of the spring.
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