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A metal wire has a resistance of 10.0 ohms at a temperature of 20 degrees C. If the same wire has a resistance of 10.55 ohms at 90 degrees C, what is the resistance of the wire when its temperature is -20 degrees C?
A boy throws a stone horizontally from the top of a cliff of height h toward the ocean below. find the speed of the stone immediately before it reaches the ocean
The highest-energy cosmic ray ever detected had an energy of about 3.0x10^20 eV. Assume that this cosmic ray was a proton. What was the proton's speed as a fraction of c
julie carries an 8.0 kg suitcase as she walks 18 m along a horizontal walkway to her hotel room at constant speed of
A double slit experiment produces 25 highlight spots with total distance y = 21cm, What is the wavelength of the laser source
a baseball is thrown from the roof of a building of height 20.6 with an initial velocity of magnitude 14.0 and directed
a very thin sheet of brass contains two thin parallel slits. when a laser beam shines on these slits at normal
700 newton Marine in basic traning climbs a 10 meter wall vertical rope at a constant speed in 8 seconds. What is his power output
When a 420 gram mass is attached to a spring, it oscillates with a period of 0.350 s. Find the force constant of the spring
Two point particles with masses m and 4m are placed along the x-axis at x = - a, Calculate the gravitational field and gravitational potential at x = 0
A laboratory technician drops a 0.0850-kg sample of unknown material, at a temperature of 100C , into a calorimeter. The calorimeter can, Compute the specific heat capacity of the sample
The projectile remains in flight for 6 seconds and travels a horizontal distance D of 155m. Calculate the speed at which the rock was launched
A daredevil decides to jump a canyon. Its walls are equally high and 12 m apart. What minimum speed must he have in order to clear the canyon
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