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A 4.3 cm long insect is perpendicular to the optical axis of a thin lens; the bug is 6.1 cm away from the lens. The lens forms an inverted image of the insect which is 0.5 cm long on a screen behind the lens. a. How far behind the lens is the screen? cm b. What is the lens' focal length (pay attention to sign)? cm c. If the insect were instead only 0.29 cm from the lens, what would the image distance be (pay attention to sign)? cm d. Could the new image be projected on a screen?
What was the ray's angle of incidence on the diamond. What should be the magnitude of , so that the net work done by it and the kinetic frictional force is zero.
A man pushes a lawn mower on a level lawn with a force of 187 N. If 51 percent of the force is directed horizontally, how much work is completed by the man in pushing the mower 7.0 m.
Find out the constant force that must be exerted on him to bring him to rest in a distance of 1.2 m in a time interval of 0.20 s.opposite the fullback's direction of motion.
A 1500 -kg automobile travels at a speed of 75 -km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop.
assume that the microwave radiation has a wavelength of 11.2 cm. How many photons are required to heat 235 mL of coffee from 25.0 ^circ rm C to 62.0 ^circ rm C.
In coming to a stop, a car leaves skid marks 82m long on the highway. Assuming a deceleration of 6m/s2, estimate the speed of the car just before braking.
what is the ratio of the amplitude of damped oscillations.
Two 24 cm focal-length converging lenses are placed 16.50 cm apart. An object is placed 39.0 cm in front of one. Where would the final image formed by the second lens be located.
what is the maximum head-start distance the speeder can have? Measure time from the moment the police car starts.
A stone has a mass of 6.00 x10-3 kg and is wedged into the tread of an automobile tire. The coefficient of static friction between the stone and each side of the tread channel is 0.84.
What is the magnetic field strength. Consider a ladder 5 meters tall, and a 150 kg weight on top of it. The ladder is leaning against the wall.
A certain cable car in San Francisco can stop in 10s while travelling at maximum speed. On one occasion, driver sees a dog a distance d m in front of the car and slams on the brakes instantly.
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