A(n) ____________________ is used to measure the brightness and color of stars
Fill in the blank(s) with correct word
photometer
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Latent Heats: A runner generates 1260 W of thermal energy. If this heat has to be removed only by evaporation, how much water does this runner lose in 15 minutes of running? The latent heat of vaporization of water is 22.6 × 105 J/kg.
A. 50 g B. 500 g C. 35 g D. 350 g E. 40 g
Process of Science: The theory of special relativity is one of the most tested theories in physics and has now been completely proven beyond all doubt
Indicate whether the statement is true or false
Which of the following statements best describes the idea behind the Gas Exchange Experiment on board the Viking landers?
A) radioactive gases should be produced when radioactive nutrients are added to a soil sample B) living organisms in the soil should give off gases when they metabolize nutrients C) soil with living organisms in it should contain organic molecules D) living organisms in the soil should incorporate carbon from atmospheric gases
As a hot iron ring cools, the diameter of the hole
A) increases. B) decreases. C) remains the same.