Work and Energy
On a bicycle, the wheels consist of wheel and axles, the handbrakes and gearshift are levers, and the chains are pulleys. This combination of two or more simple machines is called a ?
compound machines
The path of a projectile is ?
curved
Whenever a body is in motion inside the earths atmosphere, there is always what to oppose the motion?
friction
A device that converts thermal energy into mechanical energy is
heat engine
Dot diagrams are used to represent
outer level electrons
Radiant energy from the sun is transformed to what kind of energy in plants during photosynthesis?
Chemical
What type of acceleration does an object moving with constant speed in a circular path experience?
centripetal acceleration
ccording to Newton's first law of motion, a moving object...
continues moving at a same velocity unless a force acts on it.
combustion
Partciles that make up protons and neutrons are
quarks
Power is measured in ?
What is the average speed of a bicyclist that travels 500 meters over 50 seconds?
10 m/s
The relationship among force, mass, and acceleration is stated in
Newton's second law of motion
Heat is thermal energy transferred from one objet to another because of a difference in
temperature
Atoms of the same element with different numbers of neutrons are called
isotopes
At what point on a roller coaster is the gravitational potential energy the highest?
At the top of the highest drop
3 meters per second is an example of a
speed
The size of the gravitational force between two objects depends on their
masses and the distance between them
Temperature is a measure of what
the average kinetic energy
A colloids particles do what
never settle
How does a ramp make it easier to move a heavy object a certain distance?
speed and direction
In the absence of air, a penny and a feather that are dropped from the same height at the same time will
fall at the same time
Convection most likely occurs in what during convection
liquids and gases
What scientist created the Electron Cloud Model
Schrodinger