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An airplane travels 170 m/s as it makes a horizontal circular turn which has a(n) 1.4 km radius.
A) What is the magnitude of the resultant force on the 150 kg pilot of this airplane?
Answer in units of kN
B) A ball at the end of a string of length 2.1 m rotates at a constant speed in a horizontal circle.
C) What is the frequency of the motion?
Answer in units of Hz
A converging lens with a focal length of 12.9 cm and a diverging lens are placed 25.5 cm apart, with the converging lens on the left. What is the focal length of the diverging lens
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