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Two racing boats set out from the same dock and speed away at the same constant speed of 86.0 km/h for half an hour (0.500 h), the blue boat headed 21.4° south of west, and the green boat headed 40.7° south of west. During this half-hour (a) how much farther west does the blue boat travel, compared to the green boat, and (b) how much farther south does the green boat travel, compared to the blue boat? Express your answers in km.
Two objects of mass m and 9m undergo a completely inelastic collision in one dimension. what was the ratio of their speeds before the collision
There are two identical, positively charged conducting spheres fixed in space. find the initial charge on each sphere
A 25g bullet pierces a sand bag 27cm thick. If the initial bullet velocity was 64 m/s and it emerged from the sandbag with 35m/s, what is the magnitude of the friction force
A basketball of mass 270 g and radius 17 cm rolls with an initial speed of 2.5 m/s. What distance along the ramp will the ball travel before it comes to a stop
What fraction of the original kinetic energy of puck dissipates during the collision, kinetic friction before is 40 m/s, kinetic friction after is 29.3 m/s
An automatic weapon can fire 68 bullets per minute at V = 290 m/s. If each bullet has a mass M = 40 g, what is the average force in N on the shoulder
What tension in Newtons should a 50cm length of string support in order to whirl an attached 2000g stone in a circular path at 5 m/s.
On an essentially frictionless horizontal ice-skating rink, a skater moving at 3.3 m/s encounters a rough patch that reduces her speed by 41% to a friction force that is 20% of her weight
Europa, one of the moons of Jupiter, was discovered by Galileo in 1610. Europa has a circular orbit of radius 6.708 108 km and period 3.551 days. Find the mass of Jupiter
your digital camera has a lens with a 50 mm focal length and a sensor array that measures 4.82 mm x 3.64 mm. Suppose you're at the zoo, how far away from the object should you be
If the average energy released in a fission event is 208 MeV, calculate the total number of fission events required to operate a 140 W lightbulb for 6.00 hr
A cube of ice is taken from the freezer at -5.7%u2218Cand placed in a 95g aluminum calorimeter filled with 305g of water at room temperature of 20.0 %u2218C, What was the mass of the ice cube
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