Miscellaneous
What is the net force acting on the object?
20 N <---O---> 14 N
6 N left
What is the speed in a particular direction
velocity
A balloon is rubbed all over with wool. The balloon will now attract the wool because ______________.
They both have opposite charges
Name 5 types of energy
mechanical, sound, chemical, electrical, heat, nuclear, light
What is a medium?
The material a wave travels through.
Describe the energy transformation as a child sleds down a snowy hill.
Kinetic energy increases and potential energy decreases.
What is the rate of change in velocity
acceleration
What are the three parts of an atom?
Electron, neutron, and proton.
Which of the following is NOT a form of potential energy?
a. gravitational energy
b. chemical energy
c. light energy
d. nuclear energy
c. light energy
What are the two types of waves? (NOT light and sound - be more specific)
transverse and logitudinal
What are the three ways to strengthen an electromagnet?
More coils in the solenoid
More voltage (bigger battery)
Bigger iron core
What happens to an object of the forces acting on it are balanced?
The motion does not change
What is an insulator and give one example.
A material that does not allow electrons to flow freely. (i.e. wood, plastic, glass, etc.)
The law of conservation of energy states that...
Energy cannot be created or destroyed, it can only be transformed.
What does the frequency of a sound wave determine?
**Bonus** What does the amplitude determine?
The pitch
The volume
What are Newton's three laws?
1st - An object at rest will stay at rest and an object in motion will stay in motion unless acted on by an unbalanced force.
2nd - F=MA
3rd - For every action there is an equal and opposite reaction
A person produces the least friction moving across which of these surfaces?
a. carpet
b. ice
c. sand
d. wood floor
b. ice
What is the purpose of a switch in an electric circuit?
To allow the electric current to be opened or closed
What happens to an objects' kinetic energy as it rolls down hill?
***Bonus*** What happens to the potential energy?
Kinetic energy increases.
Potential energy decreases.
Name the seven types of EM waves from highest energy to lowest energy
Gamma
X-Ray
Ultraviolet
Visible Light
Infrared
Microwaves
Radio Waves
A student placed a stuffed animal on the dashboard of a car. When the car accelerated quickly, the stuffed animal flew back onto the seat.
Which principle BEST describes the motion of the stuffed animal as the car accelerated?
The law of Inertia
What is the non-contact force of attraction between objects?
gravity
What are the three ways to charge an object?
Induction
Friction
What are the transformations that take place in a flashlight?
Chemical --> Electrical --> light/radiant AND thermal/heat
What is the bending of light as it passes through a small opening
diffraction