Agenerator can be made using the component of earth’s magnetic field that is parallel to earth’s surface. a 140-turn square wire coil with an area of 4.22 ×10−2 m2 is mounted on a shaft so that the cross-sectional area of the coil is perpendicular to the ground. the shaft then rotates with a frequency of 21.4 hz. the horizontal component of the earth’s magnetic field at the location of the loop is 2.00 ×10−5 t. calculate the maximum emf induced in the coil by earth’s magnetic field

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s

The stopwatch used by a student to measure velocity of a pulse in a slinky was of least count 0.1 second. he stops the stopwatch when a pulse has made 3 journeys from one end to the other of the slinky. he finds the seconds hand to be at 52nd division. calculate the correct time noted by him.