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Atmospheric air at 20-C is flowing at 10 m=s. Calculate the drag force on
(a) a 10-cm-diameter smooth sphere,
(b)a 10-cm-diameter, 80-cm-long smooth cylinder with free ends,
(c)a 10-cm-diameter disk, and
d)a 10-cm-wide, 20-cm-long rectangular plate.
The velocity vector is normal to all objects.
A 25 N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface and the block are 0.8 and 0.3, respectively. What is the force of friction acting on the block
Suppose the coefficient of static friction between the road and the tires on a car is 0.60 and the car has no negative lift. What speed will put the car on the verge of sliding
A wooden plank is raised at one end to an angle of 30 degree. A 2.0 kilogram box is located on the incline 1.0 meter from the lower end, Determine the rate of acceleration of the box
A movie star catches a reporter shooting pictures of her at home. She claims the reporter was trespassing. To prove her point, shegives as evidence the film she seized. Her 1.77 m height is 8.29 mm highon the film, and the focal length of the came..
Consider a 80.0-kg man standing on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.18 m/s in 0.600 s. It travels with this constant speed for the next 5.00 s. The elevator then undergoes a uni..
What is the change in kinetic energy of the puck
A large punch bowl holds 3.80kg of lemonade (which is essentially water) at 20.0?C. A 5.10×10?2-kg ice cube at -10.0?C is placed in the lemonade. What is the final temperature of the system
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. find the tension in the tightrope
A boy scout ‘s girl scout girlfriend to test his scouting abilities has hidden her girl scout cookies somewhere in the forest and has given him the directions to retrieve them, How far away are the cookies
he flux passing through a part of the surface of a sphere, of area 0.010 m^2 is 4.0 (N/C)·m^2. Determine the charge enclosed by the sphere
A 1.6-m wire is wound into a coil with a radius of 3.2 cm. If this coil is rotated at 94 rpm in a 7.2×102 T magnetic field, what is its maximum emf
A 420 turn solenoid of length 32.0 cm and radius 2.80 cm carries a current of 4.80 A. Find the magnetic field strength inside the coil at its midpoint
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