Density
Which two components must a vector quantity have?
direction and magnitude
If you drop egg off of the Empire St Building, which of the following things will happen first?
drag with increase
Two 250-gm baked potatoes are identical except for the temps. Which one has more thermal energy?
the hotter potato
Rock dropped into a glass of water raises water level by 40 ml. What can you infer about the rock?
the volume is 40 milliliters
How does the sun create energy?
thermonuclear fusion
If Moby w. 570 lbs. on land, & he displaces 320 lbs of water, how much does he weigh under water (H20)?
250 pounds
What is the density of water?
1 g/cm3
When and how was the universe formed?
Big Bang Theory
How do density and buoyancy relate?
Buoyant force is directly proportional to the density of the fluid in which an object is immersed.
Why does density change with temperature?
Density changes with temperature because volume changes with temperature. As you heat something up, the volume usually increases because the faster moving molecules are further apart. Since volume is in the denominator, increasing the volume decreases the density.
How do you calculate mass using density and volume?
Density is the mass per unit of volume of a substance. The density equation is: Density= Mass/ Volume
What does the measurement unit N stand for?
Newton
If the net force on an object is zero, what can you conclude?
Object is not acceleration
Two 200-gm mugs of cider are identical except Thermal Energy Which mug of cider has a lower temperature?
The mug of cider with the less thermal energy
Tennis ball is placed in a bowl filled to brim with water. Which of following statements is true?
The water that spills out has less volume than the ball
How are density mass and volume related?
They are related by the the density triangle. Density = mass/volume
How can density be used to identify substances?
You can identify an unknown substance by measuring its density and comparing your result to a list of known densities.
How can you find mass from density?
You multiply the density by the volume. Mass=Density x Volume
What is the sun made of?
hydrogen and helium
Density is the relationship between which two quantities?
mass and volume
What is the evidence for the Big Bang?
study super nova
Two ping pong balls are identical except for their temps.Which ping pong ball has less thermal energy?
the colder ping pong ball
Acceleration occurs when an object is subjected to a(n):
unbalanced force
How did ancient people study the skies?
with their naked eyes
