Show:
Mass, Volume, and Density
Energy and Transfers
Matter
Forces and Motion
Random
100
Which is the unit of measure for distance? a. Liters b. Meters c. meters/second d. Grams
Meters
100
Kinetic energy occurs when an object is ________________.
Moving
100
What is defined as the building blocks of all matter?
Atoms
100
Write out Newton's 2nd law.
Force is the product of mass and acceleration OR F=ma
100
IS WATER WET?
Yes
200
What is the formula for liquid density?
mass / volume
200
Potential energy is __________________ energy.
Stored
200
What two particles are inside the nucleus, or center, of an atom?
Protons and Neutrons
200
Newton's first law states that an object in motion will stay in motion and an object at rest will stay at rest, unless an external force is applied. What is an example of an external FORCE that could move a resting object into motion? AND What is an external force that could take a moving object into rest?
Resting into motion: a push or a pull Motion to rest: friction, gravity Other answers can work with proper explanation
200
Is sunshlight bright?
No
300
What would be the density of an object that has a mass of 20 grams and a volume of 5 milliliters?
4 grams/milliliter (g/mL)
300
A car radio is an example of what type of energy transfer? (What type to what type?)
Electrical to Sound
300
Why do electrons orbit around the nucleus in an atom?
All matter has gravity, and most of the matter in an atom is in the nucleus
300
A rocket taking off, specifically that the fuel pointing down leads to the rocket traveling up, is a great example of which law of motion?
Newton's 3rd law of motion (Every action has an equal and opposite reaction)
300
Write out the scientific process in the correct order (6 steps)
Question Hypothesis Experiment Collect/Analyze Data Conclusion Communicate
400
What is the volume of a room that is 10 meters long, 10 meters high, and 5 meters wide?
500 cubic meters
400
What are the three types of heat transfer?
Conduction, Convection, and radiation
400
What are the 3 states of matter, and name one characteristic of the atoms and molecules in each state of matter
Solid - atoms/molecules closely packed together Liquid - atoms/molecules slightly farther apart with enough room to move around each other Gas - atoms/molecules very far apart, moving with high energy
400
What is defined as the rate of change in velocity? In other words, how quickly something gains speed?
Acceleration
500
A rock has a mass of 40 grams and volume of 20 mL. A penny has a mass of 6 grams and volume of 2 mL. Which has the higher density?
The penny, with 3 grams/mL (The rock had 2 grams/mL)
500
Kinetic energy = 1/2 x mass x velocity squared What is the kinetic energy of a rock flying through the air that weighs 10 kilograms and is traveling at 5 meters/second?
KE= 125 joules
500
Describe the change of state AND what is happening to the atoms and molecules in a block of ice when you apply heat to it?
The solid ice turns to liquid water. The atoms spread apart, move more.
500
How much force, in Newtons, does a cannonball weighing 10 kilograms generate if it is accelerating at 200 meters/second squared?
F=ma F= 10 x 200 F = 2000 Newtons
500
ACTUALLY 1000 POINTS Multi-step problem: An object has a density of 4 k/L. It's volume is 4 L. Find its mass. That same object generates a force of 48 Newtons. Using its mass and the force find its acceleration. Using the found acceleration, solve for its velocity (un-square it). Now solve for the kinetic energy of this object. What is the kinetic energy of this object?
Density= mass/volume. 4 = m/4. Mass: 16 grams F=mass x acceleration. 48N =16 kg x acceleration. 48/16 = 4 m/sec squared KE= 1/2 mass x velocity squared. KE = 1/2 (16) x 2m/sec squared Final answer: KE = 32 joules of kinetic energy