Dimensional Analysis
A thobe from a really expensive site is 137 cm. How much is that in km?
.00137 km
What state of matter has a definite volume, but no definite shape?
Liquid
The sun can heat up to 5,800 degrees Kelvin. What is this number in degrees Celsius?
5,527 C
"Temperature" is how _________ or cold something is, which measures average kinetic energy
Hot
A 1.5 kg iron rod is heated from 30°C to 200°C, before shaping into a sharp end. The specific heat (c) of iron is 450. What is the heat energy absorbed by the iron rod?
Q = 114,750 J
How long is a table in meters (m) if it is 57 nm long?
5.7 x 10-8 m
The Arctic region can experience temperatures as low as -11.37 degrees C on average. What is -11.37 C in degrees Fahrenheit?
11.53 F
What temperature related theory is "absolute zero" technically against?
Kinetic theory
Someone is cooking with a .250 kg aluminum pan, so they are wondering how much heat must be added in order to raise the pan's temperature from 20°C to 85°C? The specific heat (c) of aluminum is 897.
Q = 14576.25 J
One snack has 1021 ug of sugar, while the other has 2.5 X 10^-6 mg of sugar. Which snack has the least amount of sugar? (hint: convert both snacks to grams, and then compare)
snack 1 = .001021 g
snack 2 = 2.5 X 10^-9 g
So, she should pic snack #2!
What is the process of a liquid turning into a gas called, and is the temperature increasing or decreasing?
Mercury has no atmosphere, so the planet can heat up to 806 F in the day and cool to -292 F at night. What are both these numbers in degrees Celsius?
430 C and -180 C
Thermal energy is the total _________ energy of a substance. That is why both the temperature and mass of a substance are used to find its thermal energy.
Kinetic
A 750 g sample of ethanol is cooled from 60°C to 10°C. The specific heat of ethanol (c) is 2440. What is the amount of heat energy released by the ethanol?
Q = -91,500 J
In 12 g of carbon, there are 6.02 x 1023 atoms. How many atoms are in 0.60 g of carbon? (Hint: Convert from 0.60 grams to atoms)
3.01 x 10^22 atoms
Sublimation, increasing
The inside of a black hole is extremely cold, reaching about "absolute zero", or 0 degrees Kelvin. What is 0 K in degrees C and in degrees F?
-273 C and -459.4 F
Conduction occurs when 2 solid objects are in __________ contact with each other and are at different ________
direct, temperatures
A 500g piece of copper is heated from 25°C to 75°C. The specific heat (c) of copper is 385. What is the amount of heat energy absorbed by the copper?
Q = 9625 J
A subatomic particle is traveling at a velocity of 2.0 x 10^10 cm/sec. What is this velocity in meters/hour? (hint: convert m to cm first, then convert sec to hrs)
7.2 x 1011 m/s
During a phase change, the identity of the substance _______ (does/does not) change and the energy of a substance _______ (does/does not) change.
A volcanoe erupts in Hawaii, and researchers find out that the temperature of the lava is 2,282 F. What is this number in degrees K?
1523 K
In radiation, energy (or heat) is not transferred by direct contact. Instead, it travels as electromagnetic __________. The different colors of light from a _____ are an example of this
waves, fire
A 1-kg slab of granite loses 12,000 J of heat because it from 30°C to 26°C. What is the specific heat capacity (c) of granite?
c = -3000 J/kgC