What are the circular spots of light seen on the ground beneath a tree on a sunny day? These are
pinhole images of the Sun
.
What is the role of equations in this book?
What is the role of equations in this book?
Equations are guides to thinking and show connections between concepts
. guides to thinking.
When the sun was directly overhead in syene why wasn’t it directly overhead in Alexandria when the sun was directly overhead in syene why wasn’t it directly overhead in Alexandria?
since the earth is spherical. So,
it is not possible
that Sun was directly overhead to both Syene and Alexandria. The position of Sun will be at different angle for different cities.
Which term is defined as a guess informed by observation?
Ph Ch 1-
Define hypothesis
. an educated guess; a reasonable explanation of an observation or experimental result that is not fully accepted as factual until tested over and over again by experiment.
What test can you perform to increase the chance in your own mind that?
The best test is to
find the opinion that supports the sound knowledge of opposing ideas
. Be certain that you understand positions and objections of your most articulate antagonists. It increases the chance in your mind that you are right on particular idea.
What are circular spots of light seen on the ground beneath a tree on a sunny day?
What are the circular spots of light seen on the ground beneath a tree on a sunny day? They are
pinhole images of the sun
, where light shines through openings in the leaves that are small compared to the distance to the ground below.
What test can you perform to increase the change in your own mind that you are right about a particular idea?
What test can you perform to increase the chance in your own mind that you are right about a particular idea? See
if you can state the objections of your opponents to their satisfaction
. Test whether your views are supported by sound knowledge of opposing ideas or by your misconceptions of opposing ideas.
What is the point of solving an equation?
The goal in solving an equation is
to get the variable by itself on one side of the equation and a number on the other side of the equation
. To isolate the variable, we must reverse the operations acting on the variable.
Where do we use equations in real life?
Mathematical equations are also
used in traffic control, aircraft, space program and medicine and so on
. So we should always remember that any math equation result has the potential to change the world. That is the reason all mathematical equations are important in our life.
What is a real life example of a linear equation?
Linear equations can be a
useful tool for comparing rates of pay
. For example, if one company offers to pay you $450 per week and the other offers $10 per hour, and both ask you to work 40 hours per week, which company is offering the better rate of pay? A linear equation can help you figure it out!
Why does the sun radiate vertically at syene?
The height of the stick and the length of the shadow allowed him to calculate the angle between the vertical at Alexandria (as indicated by the gnomon) and the direction of the Sun’s rays at noon. … Because
the sunward direction
is the vertical direction at Syene on this day.
Why does the earth’s shadow taper?
The taper depends on your location on planet earth. The taper is caused by
the angle the sun shines on you including the time of the day
. They only taper when the light source is larger than the object casting the shadow.
How does the sun’s diameter compare with the Earth’s diameter?
The Sun is 864,400 miles (1,391,000 kilometers) across. This is
about 109 times the diameter of Earth
. The Sun weighs about 333,000 times as much as Earth.
Is an educated guess prediction usually in if/then form?
1.
Hypothesis
is an educated guess/prediction; usually in “IF… THEN” form.
What is a good sentence for hypothesis?
Their hypothesis is
that watching excessive amounts of television reduces a person’s ability to concentrate
. The results of the experiment did not support his hypothesis. These example sentences are selected automatically from various online news sources to reflect current usage of the word ‘hypothesis.
What does a controlled experiment test?
When possible, scientists test
their hypotheses
using controlled experiments. A controlled experiment is a scientific test done under controlled conditions, meaning that just one (or a few) factors are changed at a time, while all others are kept constant.
