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WAVES AND SOUND: v=fa IN f cycles f= seconds fapparent = factual Psound = 331 m/s+ (0.6 m/s xTemperature) a A swimmer resting on a raft notices 12 wave crests pass him in 18 s. The distance between one crest and the next crest is 2.6 m. Find: (a) frequency (b) velocity of the waves? c) period? d) If the temperature of the air where the swimmer rest is 23 degrees Celsius, what is the speed of sound? A AM

ELECTROSTATICS: kQ1Qz F. electrostatic r2 Using Coulomb's Law, determine how the electrostatic force is affected in the following situations. а Two charges, e and Q. are separated by a distance, r and the electrostatic force between the 2 charges is F. a) If Q. increases by 5 times its original value, how does F (the force) change? b) If r is halved (reduced by 2), how would F (the force) change? c) If Q. is positive and is negative the charges will? (attract or repel) d) If Q. is 5 times larger than the force that Q. exerts on O is Q (greater than, smaller than, or exactly the same as) the force that exerts on

Nuclear Physios: Answer the following a. The diagrams below represent two different nuclear processes. Which represents the process that produces energy in the sun? Diagram 1 Diagram 2 ENERGY si b. A student has an 80 g sample of a radioactive material that has a half-life of 20 seconds. How much material will he have left after one minute? c. Given the periodic table below, write a beta decay equation for the transmutation of a radioactive isotope of Rutherfordium, which has 104 protons and 183 neutrons. Periodic Table of Elements HONO