MasteringPhysics: Assignment Print View
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10/4/2007 3:25 PM
PHCC 141: Physics for Scientists and Engineers I - Fall 2007
1a. Units and Vectors
Due at 11:59pm on Thursday, August 23, 2007
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Number of answer attempts per question is:
You gain credit for:
correctly answering a question in a Part, or correctly answering a question in a Hint.
You lose credit for:
exhausting all attempts or requesting the answer to a question in a Part or Hint, or incorrectly answering a question in a Part.
reduce your score by 14.3% over each day late.
are helpful clues or simpler questions that guide you to the answer. Hints are not available for all questions. There is
for leaving questions in Hints unanswered.
questions, you lose
# of options - 1
credit per incorrect answer.
question, you lose 3% credit per incorrect answer.
REMINDER: DO THE INTRODUCTION TO MASTERING PHYSICS ASSIGNMENT FIRST - It is required for you to get credit
for subsequent assignments.
A number written in scientific notation has the form
is an integer.
Consider the expression
. Determine the values of
when the value of this expression is written in scientific
Hint not displayed
, separated by commas.
These problems concern vector components
To introduce you to vectors and the use of sine and cosine for a triangle when resolving components.
Vectors are an important part of the language of science, mathematics, and engineering. They are used to discuss multivariable
calculus, electrical circuits with oscillating currents, stress and strain in structures and materials, and flows of atmospheres and
fluids, and they have many other applications. Resolving a vector into components is a precursor to computing things with or
about a vector quantity. Because position, velocity, acceleration, force, momentum, and angular momentum are all vector
quantities, resolving vectors into components is
the most important skill
required in a mechanics course.
The figure shows the components of
, along the
axes of the coordinate system, respectively. The components
of a vector depend on the coordinate system's orientation, the key being the angle between the vector and the coordinate axes,