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A relaxed crystalline lens has a refractive index n=1.42 and radii of curvature R1=+10.0mm, R2=-6.00mm. The lens is surrounded by two media of index 1.34. Calculate the focal length and optical power of the lens, treating it as a thin lens.
A 1 kg ball is attached to a 2 m long piece of very light string and suspended in such a way that it can freely swing and it passes just above the ground.
illustrate what force should the second crewman pull so that the net force of the two crewman is in the forward direction?
A battery with an emf of 12.0 V shows a terminal voltage of 11.4V when operating in a circuit with two lightbulbs, What is the battery's internal resistance
An L-R-C circuit has an inductance of 0.490H , a capacitance of 2.90×10?5F , and a resistance of R. What is the angular frequency of the circuit when R=0
A barefoot field-goal kicker imparts a speed of 26 m/s to a football at first at rest. If the football has a mass of 0.24 kg and the If the football has the mass of 0.24 kg and the time of contact with the ball is 0.037 s, what is the force exerte..
An unstrained horizontal spring has a length of 0.37 m and a spring constant of 340 N/m. Two small charged objects are attached to this spring, one at each end. The charges on the objects have equal magnitudes.
A 58-kg skater sliding due northeast at an initial speed of 1.5 m/s runs into a snow bank and comes to rest in a time interval of 0.38 s, What is change in the kinetic energy of the skater
At the top a giant 360 swing on the high bar, a 50 kg gymnast has a velocity of 1 m/s and he is 3.5 m about the ground, What is the gymnast's gravitational potential energy
What is the speed of the electron when it strikes the target? How far does it fall under the influence of gravity during its flight?
While moving down the track at 10.0 m/s, you uniformly accelerate to 32.0 m/s in 10 s. Illustrate what is the average net force that you have applied to the car during the 10 s interval?
A small, 300 {rm g} cart is moving at 1.30 {rm m/s} on an air track when it collides with a larger, 3.00 {rm kg} cart at rest. After the collision, the small cart recoils at 0.890 {rm m/s}.
A 1300kg sports car accelerates from 0m/s to 33m/s in 12s . What is the average power of the engine?
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