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After flying for 15 min in a wind blowing 42 km/h at an angle of 28° south of east, an airplane pilot is over a town that is 40 km due north of the starting point. What is the speed of the airplane relative to the air?
km/h
Draw a free body diagram for each situation and find the magnitude of the larger of the two individual forces in units of N. Find out the magnitude of the smaller of the individual forces in units of N.
The best laboratory vacuum has a pressure of about 1 × 10-18 atm, or 1.010 × 10-13 Pa. How many gas molecules are there per cubic centimetre in such a vacuum at 293K.
An electric utility company supplies a customer's house from the main power lines (120 V) with two copper wires, Find the potential difference at the customer's house for a load current of 109 A
A long wire is known to have a radius greater than 5.6 mm and to carry a current that is uniformly distributed over its cross section, What is the radius (in mm) of the wire
A shot-putter accelerates a 7.3kg shot from rest to 17m/s, If this motion takes 1.3s , what average power was developed
A canal boat (mass=25,000 kilograms) is being towed at a uniform velocity v=3.10 m/s, Determine the magnitude and direction of the towing force
A soccer ball of mass 400g is rolling at a speed of 8m/s along a flat horizontal surface. Find the rotational kinetic energy of the ball
. Once the crate has started to move, expalin how large must F be in order to keep the crate moving at a constant speed?
The density of bcc iron is 7900 kg/m3 and its atomic weight is 56. Calculate the side of the cubic unit cell and the interatomic spacing
With what minimum speed must you toss a 170g ball straight up to just touch the 12-m-high roof of the gymnasium, With what speed does the ball hit the ground
Kelli weighs 417 N, and she is sitting on a playground swing that hangs 0.44 m above the ground. Her mom pulls the swing back and releases it when the seat is 1.00 m above the ground. Imagine that air resistance is negligible.
A 1050kg car carrying four 78kg people travels over a rough "washboard" dirt road with corrugations 4m apart which causes car to bounce on its spring suspension.
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