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A positive lens of focal length 40 cm is placed 20 cm behind a negative lens of focal length -80 cm. An object is placed 240 cm in front of the negative lens. The final image distance relative to the positive lens is:
In July 2005, NASA's "Deep Impact" mission crashed a 372-kg probe directly onto the surface of the comet Tempel 1, hitting the surface at 37000 km/h. What change in the comet's velocity did this collision produce
A computer monitor accelerates electrons and directs them to thescreen in order to create an image. If the acceleratingplates are 1.05 cm apart, and have a potential differenceof 2.00×104 V, find the change in electricpotential energy for any elect..
As in the previous problem (43), a solid block is suspended from a spring scale. If the reading on the scale when the block is completely immersed in water is 25.0 N, what are the block's volume and density
q1. a wave on a slinky has a frequency of 1.69 hz. it takes 4.1 s to travel the length of the slinky 0.29 m. what is
When a 200 N bag of nails hangs motionless from a single vertical strand of rope, how much tension is exerted in the strand? Answer in units of N. How much tension if the bag is supported by 2 vertical strands? That is, how much tension is exerted i..
A wooden raft has a mass of 76 kg. When empty it floats in water (density 1000 kg/m3) with 51 percent of its volume submerged. What mass of sand can be put on the raft without it sinking.
While taking a walk around your neighborhood, you see a flash of lightning hit the Earth in the distance. How far away did the lightning strike the ground
A long straight cylindrical wire conductor of radius R carries a current I of uniform current density in the conductor. Find the magnetic field outside the wire
How are radioactive isotopes produced?
A daredevil on a motorcycle leaves the end of a ramp with speed of 35.0 m/s, what is the max height that he reaches
When 1.0 kg of coal is burned, about 3.0 x 107 J of energy is released. how many kilograms of coal must be burned to produce the same energy as 0.79 kg of 92U235
The spring and making a variable change for the displacement of mass
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