Periodic Table
What two things does an elements atomic number tell you?
the protons and electrons
What is the equation to solve for kinetic energy?
1/2 m v^2
Electricity is simply the presence or flow of ________
electric charges
friction
Which type of wave does not require a medium in order to transfer energy?
electromagnetic wave
Give an example of a homogeneous mixture and a heterogeneous mixture
varies
Draw and label the electromagnetic spectrum
teacher will grade on board
north pole
The force of gravity an object has depends on two things. What are those two things?
Mass and Distance
what vocab word does this describe: bending of waves as it passes through a different medium
refraction
How many neutrons does gold have?
Atomic number: 79
Atomic mass: 197
118
An object has a mass of 20kg and is held at a height of 2 meters, what is the objects potential energy?
400J
When an atom loses an electron, what charge does that atom now become?
positive
A box is sitting on the table. One person pushes it to the left with a force of 15N and another person pushes it to the right with a force of 20N. What is the overall net force on the box?
5N
list 3 different type of energy (not just kinetic and potential)
varies
How many elements are on the periodic table?
118
A toaster is plugged into an outlet and heats up toast, draw and label the energy transformation
electrical to thermal
What is the charge of a nitrogen atom that gains 3 electrons?
-3
List newton's three laws
1. Law of inertia
2. F=ma
3. A pushes B, B pushes A back
An object has a mass of 2 and a volume of 10. (ignore units) what is the objects density?
5
what group on the periodic table is the least reactive (hint: think of their valence electrons)
the noble gases, group 18
What are the three different types of potential energy and how do they differ?
Electrical, gravitational, elastic
What is an electromagnet and what are the two things that determine its strength?
a temporary magnet created by coiling a wire around a metal core, and passing a current through the wire.
1) Number of coils 2) strength of battery
How much work is done on an object if someone exerts a force of 20N on it and it goes 0 meters?
What is it called when a gas turns straight into a solid?
deposition