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An 18-year-old runner can complete a 10.0 km course with an average speed of 4.38 m/s. A 50-year-old runner can cover the same distance with an average speed of 3.88 m/s. How much later (in seconds) should the younger runner start in order to finish the the course at the same time as the older runner?
What was the final temperature of the coins. What is the train's acceleration after its wheel begins to stick.
Three charges, +q, +2q, and +4q, are linked by strings (Assume that the middle charge is fixed in space and the other 2 charges are held there by the tension alone.)
A point charge q1 = -8.9 μC is located at the center of the thick conducting shell of inner radius a = 2.2 cm and outer radius b = 4.5 cm, the conducting shell has a net charge of q2 = 1.1 μC.
The human body can survive a negative acceleration trauma incident (sudden stop) if the magnitude of acceleration is less than 250 m/s^2.
an insulated container is filled with a mix of 400 g of water at 20 C and 60 g of ice at 0 C. assuming negligible heat is exchanged with the container, what is the temperature of the mixture when it reaches thermal equilibrium.
A simple harmonic oscillator is undergoing oscillations with an amplitude A. How far is it from its equilibrium position when the kinetic and potential energies are equal?
An object at rest explodes into three pieces of equal masses. One moves east at 23 m/s, while the second piece moves northwest at 14 m/s. Estimate the velocity of the third piece? Suppose each piece has a mass of 2 kg.
A 59.0 kg pole vaulter running at 9.5 m/s vaults over the bar. If the vaulter's horizontal component of velocity over the bar is 1.5 m/s and air resistance is disregarded, how high was the jump.
A container of volume 23 cm3 is initially filled with air. The container is after that evacuated at 0oC to a pressure of 30 mPa. How many molecules are in the container after evacuation if we suppose that air is an ideal gas.
The car has just achieved double its initial velocity when the driver spots a police officer behind him and applies the brakes. The car then slows down, coming to rest at the stoplight ahead.
Two equally charged, 1.00 {rm g} spheres are placed with 2.00 {rm cm} between their centers. When free, each begins to acceleration speed at 225 {rm m/s^2}. What is the magnitude of the charge on each sphere.
Assume someone drops an apple from a vertical distance of 6.0 meters, directly above the point where the arrow hits the tree.
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