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A boat must cross a 260-m-wide river and arrive at a point 110 m upstream from where it starts (see figure). To do so, the pilot must head the boat at a 45o upstream angle. The current has speed 2.3 m/s.
(a) What is the speed of the boat in still water?
(b) How much time does the journey take?
in a Tom's double-slit experiment using 549nm light, a thin piece of plexiglass of refractive index 1.53 covers one of the slits. what is the minimum thickness of the plexiglass
Two capacitors with C1 = 600 pF and C2 = 780 pF are connected in parallel. What is the reactance of the equivalent capacitance at33 kHz
A track athlete running at fast pace had an instantaneous resultant force of 2800 N acting through the heel during heel strike, what were the horizontal and vertical forces acting on the heel
Two cylinders of the same material and length, are held horizontally one atop the other with space in between so they are not touching.. Viewed from the end they look like two circles on top of each other with space between(looks like a lower case..
A 400kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Find out the force exerted by the man.
A playground merry-go-round of radius R = 2 m has a moment of inertia I = 275 kg•m2 and is rotating at 14 rev/min about a frictionless vertical axle.
Does the growth of a plant or animal violate the second low.
A pair of slits, separated by 0.180 mm, is illuminated by light having a wavelength of ? = 612 nm. Express this path difference in terms of the wavelength
when 105 mL of water at 22 C is mixed with 68mL of water at 95 C, what is the final temperature? suppose no heat is lost to the surroundings and density of water is 1 g/mL.
The drawing shows a block at rest on an incline. What is the static frictional force that acts on the block
What is frequency of the rotational motion for the wheel
An airplane's takeoff speed is 320 km/h. If its average acceleration is 2.90 m/s^2, how long is it on runway after starting its takeoff roll.
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