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A camera utilized by a professional photographer to shoot portraits has a focal length of 27.0 cm. The photographer takes a portrait of a person 1.70 m in front of the camera. Where is the image formed, and what is the lateral magnification?
A baseball player friend of yours wants to determine his pitching speed. You have him stand on a ledge and throw the ball horizontally from an elevation 3.0m above the ground, What is his pitching speed
A block of mass m is pushed up against a spring,compressing it a distance x, and the block is thenreleased. The spring projects the block along a frictionlesshorizontal surface, giving the block a speed v.
You are riding in an elevator on the way to the eighteenthfloor of your dormitory. The elevator is accelerating upwardwith a = 1.90 m/s2. what magnitudeof force must you apply
A 30-kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, How high does she rise during this interval
Consider an airplane of wing area 6.8 m^2 (both wings combined) flying through air of density 1.13 kg/m^3. What is the net upward lift force on the plane
A golf ball is a struck with a club. The force in the ball varies from zero when contact is made up to maximum value, What is the mass of the golf ball
Two pendula of equal length b and equal masses m connected by a spring of force constant k. Write the Lagrangian for the system, and use it to derive the equations of motion of the system
Compressed air can be pumped underground into huge caverns as a form of energy storage. how many homes could this internal energy serve for one day
an object slides on a level surface in the x direction. it slows and comes to a stop with a constant acceleration of
When a car makes a sharp left turn, what causes the passenger to move toward the right side of the car? inertia, centripetal force, centrifugal force, or centripetal acceleration ?
A 12.8 g bulletis fired horizontally into a 93 g woodenblock initially at rest on a horizontal surface. evaluate the speed of the bullet immediately before impact
Inside the house where the temperature is 20C, we measure the length of an aluminum rod with a micrometer made of steel, find the length of the cold rod according to the cold micrometer
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