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The speedboat B is cruising to the north at 72 mi/hr when it encounters an eastward current of speed vC = 12 mi/hr but does not change its heading (relative to the water). Determine the subsequent velocity of the boat relative to the wind and express your result as a magnitude vrel and compass direction ? measured clockwise from north. The current affects the motion of the boat; the southwesterly wind of speed vW = 21 mi/hr does not. angle given is 25 degrees.
a 2.5-kg mass is connected to a spring with spring constant k = 150 N/m and unstretched length 19 cm. the pair are mounted on a frictionless air table, with the free end of the spring attached to a frictionless pivot. the mass is set into circular..
A flywheel comprises a uniform circular disk with a mass of 99.0 kg and a radius of 1.0 m. It rotates with an angular velocity of 1472 rev/min. what is the tangential force
A ball falls straight down onto a wedge that is sitting on frictionless ice. The ball has a mass of 3.21 kg, what is the velocity of the ball after the collision
a mixture of na2co3 and baco3 weighing 0.2000 g requires 30.00 ml of 0.1000 n acid for complete neutralization. what is
Two identical point charges of q = +1.50 x 10-8 C are separated by a distance of 0.30 m. How much work is done by the electric field force to move
A certain particle has the life time of 10^-7 s, while measured at rest. How far does it go before decaying if its speed is 0.99 c when it is created.
Under favourable circumstances the human eye can detect 1.0e-18 J of electromagnetic energy. How many 600-nm photons does this represent.
A small asteroid is discovered in a circular orbit around a larger asteroid at a distance of 19.39 km. The period of the orbit is measured to be 76.76 hours. What is the mass of the larger asteroid
In a student experiment, a constant-volume gas thermometer is calibrated in dry ice (?78.5°C) and in boiling allyl alcohol (97°C). What pressure would be found at the freezing point of water
An AC generator has an output rms voltage of 58 V at a frequency of 76 Hz. If the generator is connected across a 30 mH inductor, find the inductive reactance
The mass of the Earth is 5.98 ? 1024 kg, Locate the center of mass of the Earth-Moon system as measured from the center of the Earth
On a very muddy football field, a 100kg linebacker tackles an 85kg halfback. What is the direction of this velocity
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