A 12.0 m long copper wire expands by 1.53 cm when heated from 25.0 0C to 100.0 0C.  What is the coefficient of linear expansion for the copper wire?

p1.(1).pngFig. 15-2 shows the displacement of a wave at a given position as a function of time and the displacement of the same wave at a given time as a function of position. Determine the speed of the wave.

2. Describing personalities. Use each of the following adjectives to describe someone you may know. Justify your answer and use a COMPLETE sentence. Your sentence must prove you know the meaning of the word. (15 points. 3 points each answer) ejemplo: codicioso/a/e Answer: Mi prima Susana es muy codiciosa porque no es generosa y no comparte nada con sus amigos y su familia.   Adjectives you must use: mimado/a/e exitoso/a/e puntual parrandero/a/e torpe   En caso de que los necesiten (copiar y pegar): á  é  í  ó  ú  Á É Í Ó Ú    ñ  ¿ ?  ¡  !

A scuba tank holds 16.0 L of air at pressure of 225 atm at a temperature of 20.0 0C.  How many molecules of air are in the tank?

A 50 mL L air bubble escapes from a fissure at the bottom of the sea where the pressure is 15 atm and the temperature is 5.0 0C.  What is the volume of the air bubble at the surface where the temperature is 30.0 0C?

30.0 calories is equal to how many joules of energy?

75 g of metal at 100 0C is mixed with 250 g of water at 20 0C and reaches an equilibrium temperature of 25 0C.  What was the specific heat of the metal?

How much energy does it take to heat 4.0 moles of a monoatomic ideal gas from 20.0 0C to 100 0C at constant pressure? 

A refrigerator needs to move 125 J of heat from its 5.00 0C interior per cycle and move it heat to a 20.0 0C exterior region.  What is the maximum coefficient of performance possible for this refigerator?

A heat engine absorbs 350 J of heat from a 365 0C high temperature source and expels 225 J of heat to a 20.0 0C low temperature source per cycle.  What is the maximum possible work output per cycle for this engine?