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F1 = (-3.0,3.1) and F2 = (-4.4,-3.6) where all components are in newtons. What angle does the vector F1 + F2 make with the positive x-axis? The angle is measured counterclockwise from the positive x-axis and must be in the range from 0 to 360 degrees.
Jack and Jill are standing on a crate at rest on the frictionless, horizontal surface of a frozen pond. Jack has a mass of 74.6kg , Jill has a mass of 44.0kg, What is the final speed of the crate if Jill jumps first and then Jack, again in the same..
A 20 kg loudspeaker is suspended 2.0m below the ceiling by two cables that are 30 degrees from vertical. what is the tension in the cables
the led will only light up if enough electrical current is flowing through it. the amount of current is given by i vr
consider a 10 g sample of enriched uranium containing initially 15 wo in u235 and the rest is u238 that is exposed in a
Light from an argon laser strikes a diffraction grating that has 5320 grooves per centimetre. The central and first-order principal maxima are separated with 0.488 m on a wall 1.88 m from the grating. Decide the wavelength of the laser light.
A ray of light is incident on glass-air interface at the critical angle of 41 deg., what is the refracted angle, What is the strength of a lens which forms an image 24 cm from the lens when the object is 40 cm away
A 10.0 g ball of claytraveling east at 5.50 m/scollides and sticks together with a 60.0 g ball of claytraveling north at 3.00 m/s. What is the speed of the resulting ball of clay
A frictionless roller coaster reaches a top speed of 50 m/s atground level, and then goes up a long ramp untill it comes to astop and falls back down the ramp backwards. how high ti go
A ski gondola is connected to the top of a hill by a steel cable of length 620 and diameter 1.7. What is the speed of the pulse
a supertanker with the mass of 3.34^7 kg is moving with a constant velocity .its engines generate a forword thurst of 5.38x10^5 n. determine the magnitude of the upward buoyant force exerted on the tanker by the water
Sand dunes on a desert island move as sand is swept up the windward side to settle in the leeward side, Calculate the average speed in each case in m/s
A 79 kg pole-vaulter falls from rest from a height of 4.6 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.30 s after landing on the pad. compute the athlete's velocity just before reaching the pad.
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