6. Current in length of copper wire. Two students hold a 7.6 m length of copper wire horizontally, in an east-west direction, in the school yard. The wire is
moved vertically downwards at a speed of 0.30 ms?
Given that, in this yard, the horizontal component of the Earth's magnetic field is 4.0 x 10-5 T, and perpendicular to the
wire, calculate the emf detected, to two significant figures, by a very sensitive meter placed across the ends of the wire.

1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.