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An 8-cm object is placed in front of a mirror which produces an inverted image that has a height of 16c m. When the object is moved 10 cm closer to the lens, the image is upright with a height of 16cm. What is the focal length of this lens?
Two cars are travelling on a dirt road between 3 consecutive poles after 5.40s they are side by side at next telephone pole. The distance between the poles is 66.30m.
A charged particle is injected at 215 m/s into a 0.0739-T uniform magnetic magnetic field perpendicularly to the field. What is the charge-to-mass ratio of this particle
A telephoto lens with focal length of 120mm has f-numbers ranging from f/2.8 to f/22, What is the diameter of the lens aperture at f/2.8? in millimeters
a neat diagram of the connection showing the secondary winding of a 3-phase 4 wire tnt transformer supplying three
A 7.70cm length of straight wire runs horizontally along a north-south line. Find the magnitude of the magnetic force on the wire
A ball is thrown from the brink of a cliff 15.0 m high with an initial velocity of v0 = 7.0 m/s at an angle q0 = 26.0 o above the horizontal. How long does it take to land
We are not normally aware of the gravitational or electric force between two ordinary objects. What is the reason in each case? Give an example where we are aware of each one and why.
question1the follow statement is true or false?the electric field epoint at the center of an induced dipole because of
Two express trains started 5 minutes apart. Starting from rest, each is capable of a maximum speed of 160km/h after uniformly accelerating over a distance of 2.0 km. How far ahead is the first train when the second one starts
q1. a 32 percent efficient electric power plant produces 900 mj of electric energy per second and discharges waste heat
Two spaceships approach Mars from the same direction. One has a speed of 0.2c, What is the speed of one spaceship relative to the other
A child in a boat throws a 5.15-kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest
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