physics
Whats the process of scientific method
1. Recognize a question or a puzzle - such as an unexplained fact 2. an educated guess, a make a hypothesis, that might resolve a puzzle. 3.Predict consequences of the hypothesis 4. . Perform experiments or make calculations to test the predictions 5. . Formulate the simplest general rule that organizes the three main ingredients: hypothesis, predicted effects, and experimental findings
Length
Inches, feet, yard, miles, centimeters, meter, and kilometers are all units of?
What type of path does a moving object follow in the absence of a force?
It continues to move in a straight line at a constant speed.
force
Newtons
Must people choose between science and religion?
No, there is no contradiction in being scientific and religious in one's thinking.
Which of these is the most basic science?
Physics
Clearly distinguish between science and technology.
Science gathers the knowledge that technology uses for practical purposes.
Physics
The most basic of all sciences. It is at the root of subjects like chemistry, engineering, astronomy, and biology. It is a mature science, and its laws encompass a wide scope of phenomena that range from the formation of galaxies to the interactions between particles within the nuclei of atoms.
What is the resultant of a pair of 1-NN forces at right angles to each other?
The resultant is a force of 1.41 newtons in a direction bisecting the angle between the two vectors.
What is the resultant of a 35-NN horizontal force and a 30-NN vertical force?
The resultant is a force with a magnitude of 46.10 NN.
Scientific Attitude
The scientific method inclined toward inquiry, integrity, and humility
Henry Heavyweight weighs 990 NN and stands on a pair of bathroom scales so that first scale reads twice as much as the second one. What are the scale readings?
W1,W2W1,W2 =660,330 N
what are some examples of newtons first law.
a car braking at a stoplight. a skier acerbating in a straight line down a moutian a moon orbiting the earth the earth orbiting the sun
what is a great circle
a circle that has the center of the earth as its center. radius is the earth itself. 360
friction force
a contact force between an object and another surface that always acts opposite to the direction of motion
vector quantity
a quantity that has both magnitude and direction FORCES
A theory in science is ______.
a synthesis of well-tested ideas
A fact in science is ______.
an agreement between trained investigators
Newton's Firt Law Of Motion
every object continues in a state of rest or of uniform speed in a straight line unless acted on by a net external force.
scalar quantity
fully described by specifying its number
which falls faster (heavier to lighter)
heavier bc of air pressure.
what happens if an object has more inertia
it will be more difficult to change in motion than an object with less.
mass
kg, pounds
time
second (s), minutes, days, years
What is the net force when a pair of 5-N forces simultaneously act in the same direction on an object?
10 N
A 12-NN book is at rest on a flat table. How many newtons of support force does the table provide?
12 newtons up
how many neurons does one pound of force equal
4.49 N
What is the net force on a cart that is pulled to the right with 100 pounds of force and to the left with 30 pounds of force?
70 to the right.
Lucy Lightfoot stands with one foot on one bathroom scale and her other foot on a second bathroom scale. Each scale reads 370 NN. what is Lucys weight?
740 N
Qualitative description
A description based on some characteristic quality that does not involve a quantity or measured value. For example, the pan is hot, the rock is heavy, and the cheetah is fast, are all qualitative descriptions
Quantitative description
A description based on some measured quantity. For instance, the pan was at a temperature of 87 degrees Celsius when it was removed from the stove, and the cheetah ran with a speed of 75 miles per hour, are quantitative descriptions.
What is the test for whether a hypothesis is scientific or not?
A hypothesis is scientific if it is possible to prove it wrong.
What is the Physics Primer?
A set of mathematics topics that are relevant to introductory physics courses.
Scientific Method
An orderly method for gaining, organizing, and applying new knowledge
mechanical equilibrium
Any object that is (a) at rest or (b) moving in a straight line at a constant speed is in what and the equilibrium condition applies
what are vectors represented by
arrows---- magnitude of the vector is the arrows length direction is represented by the arrows direction.
Pseudoscience is understood as
claims that are presented as scientific but do not meet scientific standards.
natural motion
motion that doesn't require an "assist," such as falling motion the circular motion of the planets (both about their own axes, and around the sun). Also, the stars ...
Violent Motion
motion that requires an "assist," a "push or a pull," like a donkey pulling a cart, someone throwing a stone, etc.
Science
the collective findings of humans about nature, and the process of gathering and organizing knowledge about nature
inetria
the property of an object to resist changes in motion.
equilibrium rule
the sum of all forces acting on the object must be zero
A scientific hypothesis deemed valid must have a test for proving it ______.
wrong
