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Question: 1) A low-power college radio station broadcasts 10 Wof electromagnetic waves.
At what distance from the antenna is the electric field amplitude 2.0Ã-10âˆ'3V/m, the lower limit at which good reception is possible?
Express your answer to two significant figures and include the appropriate units.
2) A TMS (transcranial magnetic stimulation) device creates very rapidly changing magnetic fields. The field near a typical pulsed-field machine rises from0 T to 2.5 T in 200 μs. Suppose a technician holds his hand near the device so that the axis of his 2.1-cm-diameter wedding band is parallel to the field.
Part A
What emf is induced in the ring as the field changes?
Part B
If the band is made of a gold alloy with resistivity 6.2Ã-10âˆ'8Ωâ‹...m and has a cross-section area4.5 mm2 , what is the induced current?
A bulldozer is pushing a car and a truck sideways. the coefficientof kinetic friction between the car's and the truck's tries and thepavement is 0.9. the car has a mass of 1.70 x 10^3 kg and the truckhas a mass of 4.2 x 10^3 kg. what force is the ..
A whale swims due east for a distance of 1.5 km, turns around and goes due west for 5.7 km, and finally turns around again and heads 4.5 km due east. (a) What is the total distance traveled by the whale? km (b) What are the magnitude and direction..
The wingspan (tip-to-tip) of a Boeing 747 jetliner is 59 m. The plane is flying horizontally at a speed of 200 m/s. Find the emf induced between the wing tips
A chartered airplane flies 100 km east, then 350 km northwest, and then 150 km at 30° west of south. Find the magnitude of the last leg of the journey
A glass bottle of soda is sealed by a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.50 x10 5 Pa. Assuming that the top and bottom surfaces of the cap each have an area of 4.10 x10 -4 m 2 , get the magnitude of ..
two balls 1.5 kg amp 1.1 kg hang by strings of the same length 0.75 m such that they are touching as they hang. the 1.5
A 2.0 cm x 2.0cm x 9.0 cm block floats in water with its long axis vertical. The length of the block above water is 1.0cm What is the block's mass density
two movers push horizontally on a refrigerator. one pushes due north with a force of 150 n and the other pushes due
question1with ones eye at a height of 1 m above water level on a lake one can just see over the horizon a point on the
In the figure 29-49, four long straight wires are perpendicular to the page, and their cross sections form a square of edge length a = 7.22 cm. All wire carries 15.2 A, and all the currents are out of the page. What is the magnitude of the net magnet..
Note the gravitational acceleration of equatorial sea level is g = 32.0088ft/s^2 and that its variation is 0.003ft/s^2/ 1000ft ascent. find the height in miles above its point for which g = 30.504 ft/s^2 and what is the weight of a 180lb man on top o..
a metal rod a and a metal sphere b on insulating stands touch each other they are originally neutral. a positively
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