To say there is no such thing as only one force means
A) there must also be an oppositely directed force.
B) other forces, perhaps not evident, are there.
C) gibberish.
Answer: A
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The primary mirrors of most radio telescopes is similar to the primary mirror of a reflecting optical telescope in that
a. they are both concave in shape. b. they are both convex in shape. c. they are typically the same size. d. they are both made of metal. e. they have nothing in common.
You are in the doctor's office and notice that the metal instrument tray feels much colder than the exam table you are sitting on. This is because
A. the tray actually is colder than the table. B. the exam table has a cushion inside, which is a good insulator. C. the metal conducts heat away from your hand more quickly than does the table.
A(n) ______ is data or information presented visually, such as in a chart or pyramid.
A. infographic B. carousel C. clip art D. animation
The force a spring exerts on a body is a conservative force because
a. a spring always exerts a force opposite to the displacement of the body. b. a spring always exerts a force parallel to the displacement of the body. c. the work a spring does on a body is equal for compressions and extensions of equal magnitude. d. the work a spring does on a body is equal and opposite for compressions and extensions of equal magnitude. e. the net work a spring does on a body is zero when the body returns to its initial position.