Question

Physics Help.

1. The difference between heat and temperature is: none, there is no difference heat is only warm, while temperature can be both hot or cold temperature measures the avg kinetic energy of some molecules and heat is the energy that can raise that kinetic energy heat measures the avg kinetic energy of some molecules and temperature is the energy that can raise that kinetic energy 2. The kinetic energy of a two kilogram ball moving at 5 meters/second is equal to: 18 kg(m2/s2) 25 kg(m2/s2) 50 kg(m2/s2) none of the above Suppose we have a metal bar with a mass of 3 kilograms. This metal has a heat capacity of 1000 (J/kg °C). How much energy does it take to raise the temperature of the bar by 15 degrees Celsius? 45.000 Joules 450,000 Joules 4,500 Joules none of the above 4. In part two A of your lab procedure, you pumped particles into the box and then decreased the volume of the box. What happened to the Temperature as you did this? It went up 5. In part two A of your lab procedure, you pumped particles into the box and then decreased the volume of the box. What happened to the Pressure as you did this? It went down It went up It stayed the same It changed to Torr 6. Molecules in materials are: always in motion in all materials When you heat a material, the molecules: speed up 7. Suppose I have a container that contains 2 different gases. The molecules that these gases consist of are two different sizes; gas A molecules are twice the mass of gas B molecules. The entire container is brought to 50 degrees Celsius. Which response best describes the molecules in the container? 8. Gas B molecules are moving faster than Gas A molecules

Answer 1

- Heat is only warm, while temperature can be both hat of cold. 2. Kinchic Energy = 12 mv Ta4x2x5's - 25 kg 3) Energy Q = MCAT - 3x 1000X 15 = 45,000 Joules =