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Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 3781 kg), which is made of steel (? = 7850 kg/m3). In typical comic-book fashion, they decide to raise the yacht (which is now on the bottom of a lake) by filling it with ping-pong balls. A ping-pong ball has a mass of 2.70 g and a volume of 3.35·10-5 m3.
a) What is the buoyant force on one ping-pong ball in water?
b) How many balls are required to float the ship?
Sirius has a luminosity of 8.4 * 10^27 Watts and a mass of 2.1 times the mass of the Sun, How much hydrogen does Sirius convert into helium each second
A long horizontal hose of diameter 4.2 cm is connected to a faucet. At the other end, there is a nozzle of diameter 1.4 cm. What is the velocity of the water in the hose
A metal bar is in the xy-plane with one end of the bar at the origin. What are the magnitude of the torque with respect to the origin produced by F
Maddox takes off on his jet ski so they have a combined mass of 319.86kg. The skis have a thrust of 982.13N, What is Maddox's top speed
A wedding ring is tossed into the air and given a spin, resulting in an angular velocity of 12.5 rotations per second. what is the diameter of the ring
A jet lands at 54.4 m/s, the pilot applying the brakes 2.45 s after landing. Find the acceleration needed to stop the jet within 5.17 x 10^2 m after touchdown.
A 3.50-g bullet, traveling at 250 m/s, hits a hinged, light board at right angles, at a distance of 55.0 cm from its hinges, What is the angular speed of the board
An airplane whose air speed is 608 is supposed to fly in a straight path 38 north of east. But a steady 86 wind is blowing from the north. In what direction must the plane head.
Describe the operation of a scanning tunneling microscope and explicitly include how it involves barrier tunneling.
An airplane flies from city A and arrives at city B which is located 600 km North of city A it flies the first 300km/h, find the Average velocity of the plane
Integrated circuits are manufactured in vacuum chambers in which the air pressure is 7.00x10^-11 mm of Hg. What is the mean free path of a molecule
A lawn mower has a flat, rod-shaped steel blade that rotates about its center. What is the rotational energy of the blade at its operating angular speed of 3480 rpm
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