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A long horizontal wire carries a current of I1 = 11.5 A. A second wire, made of 0.400 mm diameter copper wire, is 81.0 cm below the first wire and is held in suspension magnetically. What is the magnitude and direction of the current in the bottom wire? Give a + sign if I2 is parallel to I1, and a -sign if I2 is opposite to I1.
The mass density of Copper is 8.93x103 kg/m3.
After a plant or animal dies the 14C content decreases with a half-life of 5730 years. what is the age (in years) of the ancient site
Potassium has a work function of 2.21eV. What is the maximum kinetic energy of electrons escaping from a sample of potassium if photons of frequency 6e14 Hz strikes it?
A 5.5 g dart is fired into a block of wood with a mass of 22.6 g.The wood block is initially at rest on a 1.5 m tall post. After thecollision, the wood block and dart land 2.5 m. from the base of thepost. Find the initial speed of the dart.
A 22.5-kg rock is sliding on a rough, horizontal surface at 9.50 m/s and eventually stops due to friction. What average power is produced by friction as the rock stops
An airplane is sent on a rescue mission to help a stranded explorer near the South Pole. The plane cannot land, but instead drops a supply package of mass m = 58 kg while it is flying horizontally with a speed of vp = 116 m/s.
In a certain compound microscope, the object is 9.0 mm from the objective. What overall magnification is produced
A cameraman on a pickup truck is traveling westward at19 km/h while he videotapes a cheetah that is moving westward 24 km/h faster than the truck. Find its acceleration from the perspective of the cameraman
A shotputter throws the shot with an initial spped of 15.5m/sat 34.0degree angle to the horizontal. Calculate the horizontal distance travelled by the shot
A square, 0.67 m on a side, is mounted so that it can rotate about an axis that passes through the center of the square. What is the magnitude of the maximum torque
An organ pipe open at one end has a length of 60 cm. If the speed of sound in air is 340 m/s, what is the lowest frequency produced by the organ pipe
Ocean waves are traveling to the east at 4.9 meter per second with a distance of 21 meter between crests. Find with what frequency do the waves hit the front of a boat when the boat is moving westward at 1.2 m/s
A hypodermic syringe has a piston area of 0.5 cm^2 and a needle with circular opening of diameter 0.2 mm. What is the gauge pressure in the syringe while pushing the piston with 1 N of force
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