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A slide projector needs to create a 96.0 cm high image of a 2.20 cm tall slide. The screen is 301 cm from the slide.
1. What focal length does the lens need? Assume that it is a thin lens.
2. How far should you place the lens from the slide?
A positive charge q1 = 2.50 µC on a frictionless horizontal surface is attached to a spring of force constant k, the distance between charges to d = 9.00 cm, Find the value of k
An RLC series circuit has a 202 ? resistor and a 25.0 mH inductor. At 8220 Hz, the phase angle is 45.0°. Find the minimum possible capacitance of the circuit
A solenoid of inductance L = 50 mH has a magnetic energy U = 3 x10-4 J with a density u = 0.0042 J/m3, What is the winding density n of the solenoid
A merry-go-round starts from rest and accelerates uniformly over 23.5 s to the final angular velocity of 6.55 rev/min.
Falls resulting in hip fractures are a major cause of injury and even death to the elderly. Typically, hip's speed at impact is about 2. If this can be reduced to 1.30 or less, hip will usually not fracture. One way to do this is by wearing elasti..
A uniform electric field of magnitude 445 N/C pointing in the positive x-direction acts on an electron, that is initially at rest. The electron has moved 3.10 cm.
What additional force is necessary to hold the nozzle stationary after the water flow is turned on if the discharge rate is 0.550 kg/s with a speed of 26.5 m/s
A 25kg solid door is 220cm tall, 91cm wide. What is the door's moment of inertia for rotation about a vertical axis inside the door, 15cm from one edge.
A 0.24 kg blob of clay is thrown at a wall with an initial velocity of 23 m/s. what is the average force experienced by the clay
A photon with a wavelength 4.40 scatters from an electron initially at rest. Find out the wavelength of the scattered photon when the scattered electron has its utmost kinetic energy. Kmax = 2.37*20^-14.
A car travels at a constant speed around a circular track whose radius is 2.51 km. What is the magnitude of the centripetal acceleration of the car
The 73 kg student balances an 1100 kg elephant on a hydraulic lift. Inside the lift is filled with oil and the diameter of the piston the elephant is standing on is 2.0 m, What is the second student's mass
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