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Describe a world where the opposite of Lenz's law applies, that is where the EMF or current is in the same direction to the direction that caused it .
A 2500- Ferris wheel accelerates from rest to an angular speed of 0.21rad/sec in 14sec . Approximate the Ferris wheel as a circular disk with a radius of 30m. What is the net torque on tyhe wheel?
The right-side rearview mirror of Mike's car says that objects in the mirror are closer than they appear. What is the focal length of the rearview mirror
A friend of yours who starts out at the same age as you travels to the alpha centauri solar system which is 4.70 light-years away. How fast did she travel
it takes you 1.60 x 10-5 j to move a charge between two charged parallel plates with a potential difference of 11.0 v
A helium nucleus (charge +2e) moves through a potential difference V = ?0.40 kV. Its initial kinetic energy is 3.40 10-16 J. What is its final kinetic energy
A very strong, but inept, shot putter puts the shot straight up with an initial velocity of 11.0 m/s. How long does he have to get out of the way
Assume, they are now crossing a snow covered field (μk = 0.030, width of the field is 75 meter) at a constant speed of 12 m/s. Calculate how much energy will be dissipated by friction
A technician wishes to produce an image on a wall using a thin lens. The lens to wall distance is to be 6 meter. He also wants the image to be the same size as the object. Find the focal length of the lens he will need
The bar is held by a cord that makes a 90? angle with respect to bar and 50 ? with respect to wall. Illustrate what is the magnitude of the horizontal force Hx on the pivot? The acceleration of gravity is 9.8 m/s2.
A crate that weighs 20 Newton starts from rest and slides down a rough 5.0 meter long ramp, Inclined at 25o with the horizontal. Obtain what is the Kinetic Friction Force on the crate
A shop sign weighing 245-N is supported by a uniform 155-N bean. Find out the tension in the guy wire, and the horizontal and vertical forces exerted by the hinge on the bean.
Find the current in a 11.00 ? resistor connected to a battery that has an internal resistance of 0.25 ? if the voltage across the battery (the terminal voltage) is 24.00 V
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