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A length of aluminum wire has a resistance of 12.0 Ω at 22.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, the resistance of the wire increases to 28.2 Ω.
(a) Ignore thermal expansion; evaluate the temperature of the oven.
Calculate Escape Velocity for Mars (mass = 6.42 x 1023 kg, radius = 3397km). Is it easier to launch a rocket from Mars than the Earth
Fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to report the mass truthfully). How far apart are the half-kilogram marks on the scale
on a frictionless air track a 0.125 glider moving at 1.05 to the right collides with and sticks to a stationary 0.235
A cardinal (Richmondena cardinalis) of mass 4.00×10?2 and a baseball of mass 0.141 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's momentum?
suppose an electron is accelerated by an electric field between two plates plate a and plate b. assume the electron
A child is sitting on the outer edge of a merry-go-round that is 18 m in diameter. If the merry-go-round makes 4.9 rev/min, what is the velocity of the child in m/s
The number of radioactive nuclei in a particular sample decreases to one-eighth of the original amount in 21 days. What is the half-life of the these nuclei
The drawing shows a type of flow meter that can be used to measure the speed of blood in situations when a blood vessel is sufficiently exposed (e.g., during surgery). Blood is conductive enough that it can be treated as a moving conductor.
A laser that produces a spot of light that is 1.20 mm in diameter is shone perpendicularly on the center of a thin, what is the power of the laser
a wire of mass 5.00 grams and length 1.20 m is stretched with a tension of 36.0 n. waves of frequency 50.0 hz and
a very long and hollow conducting cylinder with inner radius 5.0cm and outer radius 12.0 cm has a uniform charge
The position of an object connected to a spring varies with time according to the expression x = (5.8 cm) sin(9.5?t), Find the period of this motion
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