Chapter 1: Intro to Physical Science
Predicts Events under certain conditions and describes HOW something works.
Scientific Law
What is the average speed of a runner who runs 255 m in 62 seconds?
Speed = d/t
Speed = 4.1 m/s
What is Newton's Third Law of Motion?
For every action there is an equal and opposite reaction.
____________ is a measure of the ability to do work.
Energy
True or False:
Sign Language is the same in each country.
False
Explain the difference between these three types of graphs (i.e. what do these three graph's each show?):
Line Graph, Bar Graph, & Pie Chart.
Line Graph: Shows continuous changes
Bar Graph: Compares similar data
Pie Chart: Shows parts of a whole
The _________ of an object consists of its speed and direction.
Velocity
The gravitational force that the Earth exerts on the moon equals 4.25 x 10^20 N. The moon's mass equals 1.55 x 10^22 kg. What is the acceleration of the moon due to Earth's gravitational pull?
0.0274 m/s^2
Energy cannot be created or destroyed.
Law of Conservation of Energy
True or False:
In ASL, you always sign with your right hand.
False.
The speed of light is approximately 3x10^8 m/s. How would this be written in standard notation?
300,000,000 m/s
The friction between objects that are stationary is called?
Static friction
A 55,550 kg luxury cruise ship is moving at its top speed as it comes into port. The ship then undergoes acceleration equal to -0.357 m/s^2 until it comes to rest at its anchorage. How large must the unbalanced force acting on the ship be in order to bring the ship to rest at the proper location?
-19,800 N
What is the Kinetic Energy of a 44 kg cheetah running at 31 m/s?
KE= 21,142 J
What spoken language is closest related to ASL?
French
Round the following number to 3 significant figures:
35,450
35,500
What is an example of helpful friction?
Anything that increases friction.
A force is continuously applied to an object, causing it to accelerate. After a period of time, however, the object stops accelerating. What conclusions can be drawn?
The object is experiencing some kind of friction.
What is an example of Conservation of Energy?
Roller Coasters
Put the following English sentence into the correct order / ASL grammar:
"What is your name?"
Your name - what?
The number 15,000,000 would be written in scientific notation as. . .
1.5 x 10^7
During a race, a sprinter increases his speed from 5.0 m/s to 7.5 m/s over a period of 1.25 s. What is the sprinter’s average acceleration during this time?
a = Vf - Vi / t
2.0 m/s^2
In 1996, Michael Johnson ran 100.0 m in 9.32 s. Johnson's mass at the time of his record-breaking run was about 77 kg. What was his momentum at his average speed?
826.18 kg * m/s
Calculate the kinetic energy in joules of a 1500 kg car that is moving at a speed of 42 km/h.
KE= 100,920 J
What are the complete names of the two founders of American Sign Language (ASL), and what country(s) were/was he from?
Name: Laurent Clerc --> Deaf
Nationality: France
Name: Thomas Hopkins Gallaudet --> Hearing
Nationality: America