Force And Motion
____________ The rate of increasing, decreasing, or constant speed. Can change if the speed and/or the direction changes
Acceleration
Which types of waves are longitudinal?
Sound Waves
The unit of electrical resistance is the
Ohms (Ω)
What are Isotopes ?
Atoms with different numbers of neutrons
What is an Electric charge ?
A property of matter.
Matter is made up of atoms (protons, neutrons, electrons).
Protons (+), electrons (-), neutrons (neutral).
If the line is straight across , what is the motion ?
Constant Speed
What happens to the sound when the amplitude increases?
It gets louder
True or False: In a series circuit, the current is the same at every point in the circuit.
True
What is Half-Life?
The time it takes for half of a substance to disappear, decay, or break down.
True of False: Magnets create magnetic fields and exert magnetic forces.
True
Lebron can run the length of a basketball court which is 28.6 m at a speed of 8.1 m/s. How long will it take him to run the full length of the basketball court? (Round to the nearest tenth)
T = 3.5 s
How are radio waves able to travel through space?
They are a form of light, so they do not require a medium
True or False: Direct current is typically used in household electrical outlets.
False
What are the properties of Ionic bonds?
Metal + nonmetal, high melting & boiling points
Electromagnets – How are they created ?
Created when electricity flows through a coiled wire around an iron core.
If the lever has a mechanical advantage of 3, does this multiply the (work, force, energy, or distance) by 3?
Force
Which EM wave has the MOST energy, frequency, and the shortest wavelength?
Gamma
What does Ohm’s Law describe?
The relationship between voltage, current, and resistance
What is Nuclear Fission?
the process of splitting a heavy atomic nucleus into two or more smaller, lighter nuclei.
How do you Strengthen an Electromagnet?
Add more coils.
Increase the power source (current).
Move coils closer together.
How do you increase the mechanical advantage of an inclined plane?
Decrease the slope by increasing the length of the plane.
A group of scientists were studying wave speed through different densities of rock. They tested wave speed through rock that had high density, medium density, and low density. Which rock did the sound travel fastest through?
The high density rock
Which best describes alternating current (AC)?
A. Current flows only one direction
B. Electrons flow from negative to positive
C. Current regularly reverses direction
D. Used in car batteries
Current regularly reverses direction
Name Covalent Compounds
1
2
3
4
mono-
di-
tri-
tetra-
How do Electric Motors Work ?
Electric current flows through a coil inside a magnetic field.