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An emf is induced in a conducting loop of wire1.30 {\rm m}long as its shape is changed from square to circular. Find the average magnitude of the induced emfif the change in shape occurs in 4.37 {\rm s}and the local 0.127-{\rm T}magnetic field is perpendicular to the plane of the loop.
A person wearing a seat belt can withstand an acceleration of -3.0 x 10^2 m/s^2. Explain how thick should barriers be to safely stop a car that hits a barrier at 110 km/h?
Two wires A and B are of equal length. Each is attached at one end to the ceiling and to a weight at the other end. The cross-sectional area of A is 2.00 mm2 and that of B is 4.00 mm2.
A source of 116m In (half-life = 54.0 min.) is counted using a G-M tube. Successive 1-min observations gave 131,340 counts, calculate the true interaction rate in the G-M tube at 12:00
x = 2 + 3t - t^2, Where x is in meters and t is in seconds, Determine At the time is the object at rest
A certain metal with atomic mass 2.6 × 10?25 kg has an interatomic bond with length 2.5 × 10?10 m and stiffness 45 N/m. What is the speed of sound in a rod made of this metal
A "spinout" type carnival ride has a diameter of 4.0-m and rotates 3.0 times every 5.0 seconds. Find the linear speed of the rider
Two waves traveling on a string in the same direction both have a frequency of 141 Hz, a wavelength of .43 m, and an amplitude of .16 m. What is the phase difference between the two waves
A 0.100g plastic bead is charged by the addition of 1 x10^10 excess electrons (i.e. so the bead becomes negatively charged). What electric field (magnitude and direction) will cause the bead to hang suspended in the air?
A mass-spring system completes 7 full oscillations in a time of 14.4 seconds. What is the angular frequency of oscillation
a 2.1- ping-pong ball is rubbed with a piece of wool resulting in a net positive charge of 7.8 on the ball.how many
consider the concentric metal sphere and spherical shells that are shown in the figure below. the innermost is a solid
Two metal plates are held together by two steel rivets, each of diameter 0.24 cm and length 1.3 cm. How much force must be applied parallel to the plates to shear off both rivets?
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