Two blocks hang from strings wound around different parts of a double pulley as shown. Assuming the system is not in equilibrium, what happens to the system's potential energy when it is released from rest?
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A person's eye lens is 2.7 cm away from the retina. This lens has a near point of 25 cm and a far point at infinity
(a) What must the focal length of this lens be in order for an object placed at the near point of the eye to focus on the retina? (b) What must the focal length of this lens be in order for an object placed at the far point of the eye to focus on the retina?
Standing Sound Waves: What is the length of the shortest pipe closed on one end and open at the other end that will have a fundamental frequency of 0.060 kHz on a day when the speed of sound is 340 m/s?
A. 1.24 m B. 1.42 m C. 2.14 m D. 4.12 m
Nuclear Binding Energy: One of the fusion reactions that occurs in the sun is:
The following atomic masses are known:
What is the reaction energy released in this fusion reaction? (1 u = 931.5 MeV/c2)
A. 11 MeV B. 13 MeV C. 15 MeV D. 17 MeV E. 19 MeV
Which of the following combinations of units is equivalent to the tesla?
a) N/(A*m) b) N*A/m c) (Js)/(Am) d) J/(C*s) e) C/(J*s)