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Question: The shoreline of a lake runs east and west. A swimmer gets into trouble 20.0 m out from shore and 26.0 m to the east of a lifeguard, whose station is 16.0 m in from the shoreline. The lifeguard takes negligible time to accelerate. He can run at 7.00 m/s and swim at 1.40 m/s. To reach the swimmer as quickly as possible, in what direction should the lifeguard start running?
(a) If the atom's diameter were expanded to the length of an American football field (91.44 m) and the nuclear diameter expanded proportionally, what would be the nuclear diameter in meters? (b) Is the saying that "the atom is mostly empty space" ..
A beam of protons at an accelerator creates a current of 120 mu/A. If the beam is focused on a target, how many protons strike the target in 30.0 s
An 8-kg box is pushed 15 m across a level floor by a constant 15.7-N applied force. Assuming the box starts from rest, what is the final velocity of the box at the 15-m point
two shuffleboard disks of equal mass one orange and the other yellow are involved in a perfectly elastic glancing
The largest-caliber antiaircraft gun operated by the German air force during World War II was the 12.8 cm Flak 40. What propulsive force was necessary to attain the muzzle speed
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -89\mu C. How many excess electrons does she get
A long, thin, massless rod of length L rotates in a vertical plane about a frictionless pivot point. Find the speed of the mass at the bottom of the swing
If I got on the interstate at the 5 mile marker and I drive to the 100 mile marker, what is the distance I traveled?
A puck of mass m1 = 63g and radius r1 = 4.30 cm glides across an air table at a speed of = 1.50 m/s. It makes a glancing collision with a second puck of radius r2 = 6.00 cm and mass m2 = 115 g (initially at rest) such that their rims just touch.
Draw graphs of both the PDF (g(•)) and CDF (G(.)) of Strawberry Creek's annual flow. Be precise with your axes. How much water diversion capacity does Tom build?
A rectangular loop consists of N = 100 closely wrapped turns and dimensions a = 0.4m and b= 0.3m. What is the expected direction of rotation of the loop
What is the magnitude of the electric field produced by a charge of magnitude 6.40oC at a distance of 1.00 m
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