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A wire of 10.0 meter length and a square (1.0 mm x 1.0 mm) cross section is made of a material with a resistivity of 5.0 x 10-8 W•m.
(a) Determine what is its resistance?
(b) If a potential difference of 1.00 Volt is maintained between the ends of the wire, find at what rate is heat generated in the wire (i.e. power consumption)?
(c) Three of these wires (identical) are located side-by-side (in parallel). Determine what is the new power consumedassuming the same power supply is attached?
(d) Five of the wires are now attached end-to-end (series). Determine what is the new power consumed?
A bullet with a mass of 4.95 g and a speed of 940 m/s penetrates a tree horizontally to a depth of 6.15 cm. Calculate the magnitude of this frictional force
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you are pushing a refrigerator across the floor of your kitchen. you exert a horizontal force of 315 n for 7.1 s during
a 150 gm ice cube at 0.0 celcius is dropped into an insulated cup with 200 gm of water at 15 celcius. describe the final mixture after equilibrium has been reached
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A "light-year" is the distance light (speed = 2.998 108 m/s) travels in one year. What is the speed of light in AU/h
A positive charge of Q = 5.40 uC is fixed in place. From a distance of ri = 4.20 cm a particle of mass m = 5.50 g, What is the minumum distance rf between the two charges
Common thermometers are made of a mercury column in a glass tube. which has the larger coefficient of linear expansion
A 50 loop circular coil has a radius of 3.0 cm. It is oriented so that the field lines of a uniform magnetic field of magnitude 0.35 T are normal to the area of the coil. Find the average induced emf in the coil
A simple 3.00 m long pendulumoscillates at a location where g = 9.80 m/s2. How many complete oscillations does it make in 8.00 min
If the bullet has a mass of 21.5 and a speed of 310 , how high would the block rise into the air after the bullet becomes embedded in it.
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