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The resistance of No.28 copper wire is 0.00213Ω/cm. The resistivity of the dommercial copper is1.72E-8 Ωm. Find:
a. the diameter of No.28 copper wireb. the heat power generated on a 12-m No.28 copper wire whenit is connected to a 1.5 V battery (Neglect the internal resistance of the battery.).
A criminal is escaping across a rooftop and runs off the roof horizontally at a speed of 5.6 m/s,hoping to land on the roof of an adjacent building. Air resistanceis negligible. The horizontal distance between the two buildings isD, and the roof of t..
presents a model for solving problems such as this one. A 1070-kg van, stopped at a traffic light, is hit directly in the rear by a 733-kg car traveling with a velocity of +1.13 m/s. What is the final velocity of the car and van
Earth-Moon Center of Mass The Earth has a mass of 5.98×1024kg, the Moon has a mass of 7.35×1022kg, How far from the center of the Earth is the Earth-Moon center of mass
If a person were to push hardly on a solid wall will the work be done? Also, why would it be exhausting to push hardly against this solid wall?
The angle of elevation theta is increased slowly from the horizontal. Illustrate at what value of theta does the block begin to slide (in degrees)?
in lightning storms the potential difference between the earth and the bottom of the thunderclouds can be as high as 50
A student from Sidney, Australia compares the distance he obtained from the 1-st spark mark to the 20-th spark mark, What difference in the results was found
On a highly polished, essentially frictionless lunch counter, How much mechanical energy dissipates in the collision
A straight wire carrying a 2.7 A current is placed in a uniform magnetic field of magnitude 0.25 T directed perpendicular to the wire. Find the magnitude of the magnetic force on a section of the wire having a length of 10 cm
Batman, mass = 91kg, jumps straight down from a bridge into a boat, mass =510kg, in which a criminal is fleeing. The velocity of the boat is initially =11m/s. What is the velocity of the boat after batman lands on it?
A positively charged conducting sphere is orbited by an electron at a constant distance. The potential difference that the electron experiences between two points in the orbit is equal to zero.
Two points are given in polar coordinates by (r, 0)=(2.00m, 50.0°) and (r,0)= (5.00m, -50.0°), respectively. What is the distance between them
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