The energy of the Sun starts as radiation, but is actually transported to its surface by convection, where it is radiated off into space at last
Indicate whether the statement is true or false
TRUE
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The ____ is 18 years and 11 days long
a. sidereal period b. synodic period c. eclipse season d. Saros cycle e. eclipse year
Specific Heat: If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of heat was added to it, which of the following quantities would be most helpful to know?
A. initial temperature B. specific heat C. density D. coefficient of linear expansion E. thermal conductivity
Significant Figures: Using a digital balance the mass of a certain piece of wood is read as 12.946 g. Thinking in terms of accuracy and significant figures, what value would you record on your data sheet if the balance is accurate to one-tenth of a gram?
A. 12.9 g B. 12.95 g C. 13 g D. 13.0 g
An inventor claims to have designed a perpetual motion machine, a device that creates its own power. Which of the following laws best explains why a perpetual motion machine cannot work?
A) Law of conservation of energy B) Law of conservation of matter C) Newton's second law D) Newton's third law