A hot wheels car accelerates at a rate of 5m/s2 west. The car has a mass of 3 kg. How much force was applied to the car to produce this acceleration?
5m/s2 * 3kg=15 N west
Don't forget direction and Newtons!
What is the difference between heat and temperature?
Heat is the energy of a substance that comes from the speed of its molecules.
Temperature is the measure of the average speed of moving particles within a substance.
What are the 3 properties of air?
Air takes up space.
Air has weight.
Air has pressure.
The buoyant force applied to an object in fluid is equal to the weight of the fluid displaced by the object NOT by the weight of the object itself.
Why is it important to understand vertical alignment of the TEKS in content areas?
Each year builds on the previous year.
What is a "black box" and what is an example of one?
A black box is any system that can't be observed or touched directly and can not be completely understood, like the Earth's core.
Why didn't the blob of clay float when the boat made out of the blob wouldn't?
The boat is a clay-air system. The density of the boat is less than the density of water because of the air. The clay blob's density is greater than the buoyant force therefore the blob sank.
the study of how size affects the relationship between weight, strength and surface area
can be demonstrated
space defined by length, width and height
an upwards force acting on objects in fluids
metric unit used in scientific application
amount of stuff in something
how much matter is squeezed into a given space
model of the universe with the Sun in the center
unit of measurement for volume
metric unit used in everyday life
force on a object due to gravity
anything that has mass and volume
a model of the universe with the Earth as the center
a force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface
3 Things Necessary for a fire to burn
Right kindling temperature
It takes 5 seconds to walk from my house northward to my neighbors 8 meters away. What is the average velocity?
Don't forget direction!
A turtle swimming in a straight line toward shore has a speed of 0.50 m/s. After 4.0 seconds, its speed is 0.80 m/s. What is the turtle's average acceleration?
A=change in velocity/time
(0.80 - 0.50) m/s / 4s = 0.075 m/s2 toward shore
Drew finishes a 132 meter race in 18 seconds. What is his average speed?
132m/18s = 7.3 m/s
Automobile seat belts are necessary for safety because of a passenger's __________.
Exactly 2 g of steel wool was placed in a 100 g glass jar. After 50 g of water was added to the jar, the lid was sealed tightly. One week later, the steel wool had turned completely to rust. What was the mass of the jar and its contents after 1 week?
Air flows from areas of ________ pressure to areas of _______ pressure.
A straight line distance covered during a certain amount of time describes an object's _________.
The Fortune Telling fish curls, twists and bends in the palm of your hand because . . .
the cellophane absorbs moisture from your hand
Which 1 of Newton's laws serves as the basis for rocket travel?
According to Boyle's law, if the volume of a gas increases, the pressure increases.
The correct order for the colors that make up the visible light portion of the electromagnetic spectrum are . . .
A marshmallow (a colloid) is an example of a _____ in a _____.
If we have 2 balls that are 1 m apart and we tripple the original distance, the gravitational force decrease to _______ its original value.
32 = 9 = 9/1 = 1/9
Held in place by the force of gravity are the top 2 gases in our atmosphere. They are ____% oxygen & ____% nitrogen.
The force of gravity between 2 objects depends on their mass and the distance between the 2 objects.
True or False
___________ is defined as a force acting through distance.
Which 1 of the following is NOT true about carbon dioxide?
it is odorless
it is heavier than air
it is colorless
it supports combustion
it supports combustion
In order to cause something to move in a circular path, it is necessary to provide . . .
You want to know if an egg is raw or hardboiled without breaking it. One way to determine this is to . . .
spin the egg and observe its behavior.
At standard sea level the atmospheric pressure is ____ pounds per square inch.
The winner of the shot put event in the Olympics is the person who best uses . . .
Newton's 2nd law
Which of the following are properties of both liquids and gases, but not of solids?