non-arbitrary) representation of the natural world.
and density (kg/m3) as some derived units.
2.5 cm x 1.23 cm the result is 3.1 cm2.
answer must be written using only two significant digits as 130.
(with rounding), since the quantity 5.2 is significant only to ± 0.1.
we round off to the closest power of 10 (ex: 75 kg is expressed as 102 kg).
we would express the order of magnitude as 108 miles.
of measured values with each other. It can be measured by average deviation.
8. Each instrument has an inherent amount of uncertainty in its measurement.
to do so would require an infinitely precise instrument.
9. A measure of the precision of an instrument is given by its uncertainty.
with the actual measurement, for example, 41.64 ± 0.02cm.
you report the length of the rod as 10.23 ± 0.02 cm (0.1023 ± 0.0002 m).
to be represented by error bars.
and the dependent (measured) variable on the y-axis.
quadratic (parabolic), or chaotic relationships.
(factor labeling) to determine if equations are correct.
which we know as Avogadro's number.
the Greek letter rho, ρ, for density and the equation is ρ = m / V.
Physics are case sensitive. For example, A is area, but a is acceleration.
Another example, T is temperature, but t is time.
sides and angles of right triangles.
after school (4:00 – 5:00 PM).
Best to send an email to rpersin@fau.edu.
Website Homework Assignment #1. Show all work.
method to determine what college to attend.
2. Find an English-to-Metric System of Measurement conversion table.
4. Express all the measurements given in #3 in scientific notation.
6. Express each answer in #5 as an order of magnitude.
7. Solve for the variable in red. Show all of your steps.
an equation for λ that does not involve E or f .
SOHCAHTOA. This allows us to find the x and y components of any vector.
For the horizontal, or x-component of a vector A, we have, A·(cos F ).
IV. Some Properties of Vectors.
Two vectors are equal only if they have the same magnitude and direction.
easily add the third dimension, or z direction using unit vector k.
Vectors can be added graphically using the head-to-tail method.
origin to the head of the last vector.
words, to subtract a vector, just add the opposite.
It is much like subtracting two numbers: A - B = A + (-B).
This diagram illustrates vector subtraction in the tip-to-tail style.
The original B vector is shown as a dashed line.
VII. Multiplication of a Vector by a Scalar.
only length. If A = (1,2) then 3A = (3,6).
Problems and Show All Work.
5. A pole-vaulter applies a force of 415 N to the pole at an angle of 37º.
What are the horizontal and vertical components of this force?