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to focus a camera on objects at different distances, theconverging lens is moved toward or away from the film, so a sharpimage always falls on the film. a camera with a telephoto lens(f=200.0mm) is to be focused on an object located first at adistance of 3.5 m and then 5.0 m. over what distance must the lens be movable?
A light ray is traveling toward an interface between sapphire, n= 1.76, and water, n= 1.33. What is the critical angle for total internal reflection
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0894 s, estimate the vertical components of the launch velocity
A tiny piece of metal contains 100 magnetic spins. At room temperature, there is an equal likelihood for an individual spin to be "up" versus "down." What is the probability of finding the metal fully magnetized
A crane weights 10500kg and the wrecking ball is 800kg. the arm of a crane can extend to a lenght of 22m. Whats the max speed of the wrecking ball
A woman stands in an elevaor that has a constant upwardacceleration while the elevator travels upward a distance of18.0m. What is the normal force that the elevator floor exerts on her
Estimate how much energy is required to transmit one action potential along the axon 25 cm long of radius 30 micrometers . The thickness of the membrane is about 10^-8 and the dielectric constant is about 3.
A 24-kg boy stands 1 m from the center of a frictionless playground merry-go-round, which has a moment of inertia of 218 kg m2. Calculate the speed of the boy relative to the surface of the merry-go-round
Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. How much charge flows between the ground and the cloud
A 1.80 mH inductor is connected in series with a dc battery of negligible internal resistance, a 0.840 k-ohm resistor, and an open switch. How long after the switch is closed will it take for the current in the circuit to reach half of its maximum..
A parallel-plate capacitor has an area of 4.37 cm2, and the plates are separated by 1.07 mm with air between them. What is the potential difference across the plates of the capacitor
The statue of Isaac Newton is crated and moved from the Oxford Museum of Natural History and Science for cleaning. find the normal force between the ramp and the crate
he diffraction pattern is viewed on a screen 55.5 cm from the slit. The distance on the screen between the third order minimum and the central maximum is 1.91 cm. What is the width of the slit
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