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Urn A contains three balls: one black, and two white; urn B contains three balls: two black, and one white. One of the urns is selected at random and one ball is drawn. The ball is black. What is the probability that the selected urn is urn A?
A golfer imparts a speed of 29.3 m/s to a ball, and it travels the maximum possible distance before landing on the green. What is the longest "hole in one" that the golfer can make, if the ball does not roll when it hits the green
At one instant a bicyclist is 25m due east of a park's flagpole, going due south with a speed of 8 m/s. Then, 11 s later, the cyclist is 65m due north of flagpole, going due east with a speed of 10 m/s.
a 2kg mass ona horizontal frictionless surface is attached to the free end of an ideal spring of stiffness k=30N/m. by what distance is the spring compressed as the mass comes to rest again
A three-legged wooden bar stool made out of solid Douglas fir has legs that are 2.5cm in diameter.When a 65 man sits on the stool, by what percent does the length of the legs decrease
After the horizontal projectile leaves the gun, what are the accelerations in the x and y directions
A 2.0-kg ball attached to a string whose length is 1.5m movescounterclockwise (as viewed from above) in a horizontalcircle. The string makes an angle θ= 30o withthe vertical.
A car with a mass of 1500kg moving at 40m/s comes to a stop in8 seconds. What is the change in momentum of the car
The heating element of a water heater in an apartment buildinghas a maximum power output of 37 kW. what is the maximum possible temperature of the hot water
A 100 W light bulb has a resistance of about 12 ohms when cold (20 degrees C) and 140 ohms when hot. Estimate the temperature of the filament
Explain how good thermal contact with liquid nitrogen can keep objects at a temperature of 77 K (liquid nitrogen's boiling point at atmospheric pressure).
an air bubble has a volume of 1.20 cm3 when it is released by a submarine 115 m below the surface of a lake. what is
Two insulating spheres having a radii of 0.44cm and 0.64cm, masses 0.16kg and 0.49kg, How fast is the smaller sphere moving when they collide
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