Basics
What is Planck's law?
E = hf
Which of the following is an example when an uncontrolled experiment is best?
the human body
Ordered from strongest to weakest, the non-contact forces are
the strong nuclear force, 2) the electromagnetic force, 3) the weak nuclear force, and 4) gravity.
who created the scientific method
aristotle
mass is measured on
balance
center of gravity
center of gravity is a point on an object where the force of gravity can be considered to act. if irregular shape. point where the object balances without rotating in any direction.
center of mass
center of mass of an object is a point on the object such that if a uniform force is acting on the object, If the force due to gravity is same, the center of mass is the same as the center of gravity.
magnitude
degree of force
When were the first pictures of the Milky Way taken?
early 1900s
friction
force exerted on a moving object and opposes the motion of that objec
Explain how you read measurements in a graduated cylinder?
get at eye level with the top of the liquid. You should read the volume at the bottom of the meniscus.
What are the characteristics of a liquid?
has a definite volume, assumes the shape of the container, will allow a solid to pass through it easily, and becomes a gas when heated.
What are the base units the SI units are based on?
10
formula to determine density?
Density = mass / volume
What is the SI unit for measuring temperature?
Kelvin (K)
Who is considered the father of modern Astronomy?
Nicolas Copernicu
Explain the difference between science and technology?
Science is the study of the natural world. Technology is the application of scientific discoveries. Without science technology could not exist and without technology there would be few applications of science.
Which theory of relativity explains the following scenario:"A boy comments to his mother that it seems like we are not moving on this train while another train traveling the same speed and in the same direction can be seen out his window."
The Theory of Special Relativity.
Explain how Archimedes determined what King Hiero II's crown was composed of.
The amount of water the crown displaced was the same as the amount that the gold displaced so he concluded the crown as composed of gold. weighed gold and silver then crown do see displacement
What "new theory'" says:all matter and energy in the universe is composed of incredibly tiny vibrating strings.
The superstring theory
What law or theory can explain the idea that if you are standing on a Earth, satellites move quickly, but if you are standing on another satellite they seem to stay still.
The theory of relativity
convert 1 meter to centimeters and kilometers
To convert 1 meter to centimeters you would multiply by 100, since there are 100 centimeters in one meter. To convert 1 meter to kilometers you would multiply by 1/1000.
normal force
When you sit on a chair, the chair is holding you up with normal force. acts perpendicular to an object
contact force
a push or pull that is exerted when two or more objects are physically touching
Area of a triangle formula
hxb/2
What is the SI unit for mass?
kilogram
vectors
length of the arrow indicates the magnitude of the force measure the resultant vector's length to determine the magnitude of the force, and you measure the angle of the resultant vector to determine the direction of the forceThe third arrow (after the equal sign) is called the resultant vector or resultant force.
What are the steps of the scientific method?
observation - what is the problem hypothesis educated guess experiment tests a variable results outcomes of those tests conclusion review and assess
What is the SI unit for time?
second
archimedes
ship shaker, screw, crown
What are advances in human civilizations usually linked to?
technology
in equilibrium
two forces are opposite in direction and equal in magnitude, they are called balanced forces.
Imagine your teacher asks you to design an experiment where you test the effect of temperature on the growth of a plant. You have 5 plants that you plant and place in different temperatures around the room. What would your variables be and what would your constants be.
variables - temperature constants - light, height of the plant when you start, water, type of soil, type of plant, wind, the pot
the amount of space that an object takes up
volume
weight is measured on
weight is measured on a spring scale
