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At a given instant the current and self-induced emf in an inductorare directed as indicated in the figure 30-63. The induced emf is23 V and the rate of change of the current is 24 kA/s; find the inductance in henrys.
in a newtons rings demonstration using 540-nm light the distance from the center of the rings to the first bright ring
A 17cm radius air duct is used to replenish the air of a room 7.1 m x 5.2 m x 4.5 m every 16 min. How fast does air flow in the duct
A waterproof rubber ball with bulk modulus 2.725·107 N/m2 is submerged underwater to a depth of 98.69 m. What is the fractional change in the volume of the ball
A boat moves through the water of a river at 10-m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 1.6-m/s.
An object moves with constant acceleration 4.40 m/s2 and over a time interval reaches a final velocity of 12.4 m/s. what is its displacement during the time interval
A car is approaching a reflecting wall. A stationary observer behind the car hears a sound of frequency 790 Hz from the car horn and a sound of frequency 813 Hz from the wall. What is the frequency of the car horn
A light string is wrapped around a 0.20-kg hollow 0.080-m-radius hoop. What is the angular acceleration of the hoop
find the mass of Earth from the period T and the radius r of the Moon's orbit about the Earth. T=27.3 days and r=3.82E5 km. suppose the Moon orbits the center of Earth rather than the center of mass of the Earth-Moon system.
A satellite is in a circular orbit around the earth. The period of the satellite is 25.4 hr. Calculate the radius of the orbit and speed of the satellite
a model rocket is launched straight upward with an initial speed of 70.0 ms. it accelerates with a constant upward
question two bumper cars of equal mass m700 kg collide head-onelastically. car 1 was moving to the right at 1.5 ms
Water(density=1.00X103 kg/m3) flows at10.0m/s through a pipe with radius 0.030m. What is the radius of the pipe on the second floor
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