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A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.95 V and a current of 2.8 A are induced in the coil. The wire is the re-formed into a single-turn square coil, which is used in the same magnetic field (again perpendicular to the plane of the coil and with a magnitude changing at the same rate). What emf and current are induced in the square coil?
a hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. estimate the length of the lake
One of the fastest recorded pitches in major-league baseball, thrown by Tim Lincecum in 2009, how far would the ball fall vertically by the time it reached home plate, 60.5 ft away
A thin spherical shell has a radius of 1.70 m. An applied torque of 920 N m imparts to the shell an angular acceleration equal to 6.70 rad/s2 about an axis through the center of the shell. What is the rotational inertia of the shell
A bird flies 3.6km due west and then flies 1.2km due north, What is the angle between the net displacement vectors of the 2 birds
Two space walkers, one with a mass of 77 kg and the other with a mass of 78 kg, hold on to the ends of a lightweight cable 14.5 m long. how far will the less massive astronaut move
If the spring is pulled until it stretches 2.40cm and the pack remains at rest, what is the force of friction exerted on the backpack by the table
Light of 546 nm wavelength is incident on a cesium surface that has a work function of 1.91 eV. find the threshold wavelength
At 20.0°C, a mainly silicon resistor has a resistance of 275 ?, and a tungsten resistor has a resistance of 752 ?. At what temperature will their resistances be equal
A 1.11 kg mass is at the center of a uniform spherical shell of mass 1.09 1020 kg and radius 1.07 106 m. Find the resultant gravitational force on the mass
Two point charges have a value of 30 ?C each and are 4 cm apart. What is electric field at the midpoint between the two charges
The driver of a 1780 car traveling on a horizontal road at 108 suddenly applies the brakes. How many meters does the car travel before stopping
A golf ball is a struck with a club. The force in the ball varies from zero when contact is made up to maximum value, What is the mass of the golf ball
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