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A goldfish is swimming at 3.20 cm/s toward the front wall of a rectangular aquarium. The index of refraction of water is 1.333. Compute the apparent speed of the goldfish as measured by an observer looking in from outside the front wall of the tank?
Two cars leave a stoplight, one 0.5128 s before the other. The second car accelerates with twice the acceleration of the first. What is the ratio of their speeds at that instant
A refracting telescope has an angular magnification of -92.00. The length of the barrel is 1.100 m. What are the focal lengths of the objective
A block (m=.75kg) is released from the top of a frictionless inclineed plane that has a height of 1.5m, How much energy was lost in the collision
question asteroid 433 eros is one of the largest near-earth asteroids. for purposes of this problemassume it is
One of the most powerful cranes in the world operates in Switzerland. If it takes 1.00 min to lift the load at constant velocity to this height, find the power developed by the crane
Calculate the time it takes the sled to travel 21 m down the slope and draw a free-body diagram for the sled sliding down the slope.
suppose a large crate of 300kg is hung from a uniform steel beam of mass 100kg and 2 meters in length. what would be he initial angular acceleration of the beam
The lenses used in a compound microscope have powers of + 90 D and + 60 D . If a total magnification of -250 x is desired, what should be the distance between the two lenses
A parallel-plate capcitor with air dielectric has a plate area of 75cm^2. what is the distance between the plates
question a gass has 100 j of energy in the form of heat is transfered to a system and the system does 150 j of work
two 10-cm-diameter charged disks face each other 21 cm apart. both disks are charged to - 70 nc.the electric field
On the Moon, the average surface temperature is 127 ?C during the day and -183 ?C during the night. What is the corresponding change on the Fahrenheit scale
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