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An emf is induced by rotating a 800 turn, 15.0 cm diameter coil in the earth's 5.00 x 10-5 T magnetic field. What average emf is induced given the plan of the coil is originally perpendicular to the earth's field and is rotated to be parallel to the field in 15.0 ms?
A boat is cruising in a straight line at a constant speed of 2.5 m/s when it is shifted to neutral. what was the boats acceleration while coasting
When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. Calculate the change in the combined kinetic energy of the two-car system during this collision
A wire carries a steady current of 2.60 A. A straight section of the wire is 0.750 m long and lies along the y axis within a uniform magnetic field, = 1.40 T. what is the magnetic force on the section of wire
A 4.00-kg particle moves along the x axis. Its position varies with time according to x = 3.0t + 2.0t^2 where x is in meters and t is in seconds. Find the acceleration of the particle
A pair of speaker produces a sound level of 100dB at a point. If one speaker is turned off, what would be the sound level? Assume both speaker produces same level of sound.
A light bulb is connected to a 120.0-V wall socket. The current in the bulb depends on the time t according to the relation I = (0.839 A) sin [(204 Hz)t]. Determine the resistance of the bulb's filament
An arrow is launched vertically upward from a crossbow at 97.9 m/s. Ignoring air friction, what is its instantaneous speed at the end of 10.0 s of flight? What is its average speed up to that moment? How high has it risen? What is its instantaneou..
You and your friend Peter are putting new shingles on a roof pitched at 22 degrees. If the coefficient of kinetic friction between the box and the roof is 0.54, with what speed should you push the box to have it gently come to rest right at the edg..
A small rock with mass 0.12 is fastened to a massless string with length 0.80 to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45 with the vertical. Air resistance is negligible.
A steel cable is to support an elevator whose total (loaded)mass is not to exceed 3100kg. calculate the diameter of the cable required
the elastic energy stored in a stretched bungie cord is found to be 568 j. the the bungie cord is stretched 0.349 m
A piece of audio equipment is said to have a signal-to-noise ratio of 52 dB. Obtain the ratio of intensities of the signal and the background noise
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