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A jet plane lands with a speed of 88 m/s and can accelerate at a maximum rate of -4.40 m/s2 as it comes to rest.
a) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest?
b) What is the actual minimum distance needed to stop the plane?
c) at what time after touchdown does the plane reach 1/2 the minimum distance determined above?
what speed does boxcar have after 10 seconds.What is the object's displacement Dx.
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of -0.6020 N when separated by 50 cm, center-to-center.
Two long, straight wires are separated by 0.12 m. The wires carry currents of 1.0 A in opposite directions, as the drawing indicates. Find the magnitude of the net magnetic field at the point A
A 73 kg parachutist descends during a vertical height of 420 m with constant speed. Find the increase in entropy produced by the parachutist; assume the air temperature is 21°C.
A bird flies 3.6km due west and then flies 1.2km due north, What is the angle between the net displacement vectors of the 2 birds
Two pipes of equal length are each open at one end. Each has the fundamental frequency of 500 Hz at 325 K. In one pipe the air temperature is increased to 330 K. If the two pipes are sounded together, what beat frequency results.
A rocket has an initial mass of 28,000 kg, of which 20 percent is the payload. It burns fuel at a rate of 185 kg/s and exhausts its gas at a relative speed of 1.8 km/s.
an astronaut weighs 1000N on the surface of the earth(radius = 6.38*10^6m) what is the weight of the astronaut at the elevation of 620 km above the earth's surface
Two people, one at each end of a uniform beam that weighs 400N hold the beam at an angle of 25 degrees to the horizontal
This caused Goodly to borrow to meet its obligations, resulting in a drop in its stock price. Are the directors liable? Explain why or explain why not?
Two identical point charges (q = +6.95 10-6 C) are fixed at diagonally opposite corners of a square with sides of length 0.485 m. A test charge (q0 = -2.15 10-8 C), Determine the speed of the test charge
A student is reading a lecture written on a blackboard. If the writing on the blackboard is 4.80 cm high, what is the size of the image on her retina
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