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A father racing his son has three-fifths the kinetic energy of the son, who has two-fifths the mass of the father. The father speeds up by 2.5 m/s and then has the same kinetic energy as the son.
(a) What is the original speed of the father?
(b) What is the original speed of the son?
Why is surface wind always directed at some angle across sea-level isobars toward lower pressure? Why is the surface wind directed across the sea-level isobars at a greater angle in Madison than over the middle of Lake Michigan.
A 800kg car pushes a 1800kg truck that has a dead battery. When the driver steps on the accelerator, What is the magnitude of the force of the car on the truck
A 3.5-kg block of iron (c=0.11 kcal/kgoC) that has been brought to a temperature of 1,063oC is placed on top of a 2.5-kg block of ice (c=0.5 kcal/kgoC) that has been cooled to -50oC
A constant force of 23 N pulls on a 12 kg block on a horizontal surface. What is the work done by the constant force
Neutron stars consist only of neutrons and have unbelievably high densities. Find the density of such a star
A cigarette lighter in a car is a resistor that, when activated, is connected across the 12-V battery. Suppose a lighter dissipates 32 W of power. find the resistance of the lighter
If so evaluate their acceleraton and the tension in the string. If not determine the sum of the magnitudes of the forces of friction acting on the blocks.
an object of mass m=3.1g and charge q=+48 is attached to a string, find the magnitude of the electric field and the tension in the string
If 20 grams of hot water at 80 C is poured into a cavity in a very large block of ice at 0 C, what will be the final temperature of the water in the cavity? How much ice should melt in order to cool the hot water down to this temperature.
Spark plugs should be tightened to a specified torque of 9.28Nm. You have a wrench that is 0.39 m long, What force must you exert on the wrench
A railroad locomotive with a mass of can exert a force of. At what rate can it accelerate when pulling a train
A ship sets out to sail to a point 182-km due north. An unexpected storm blows the ship to a point 158-km due east of its starting point. How far must it now sail to reach its original destination.
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