When you sit by a campfire, by what method of heat transfer are you primarily being warmed?
What will be an ideal response?
by radiation
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A 4.0 kg mass has a velocity of 12 m/s to the WEST. The 4.0 kg mass undergoes an acceleration of 2.0 
to the WEST for 3.0 sec. What is the velocity of the 4.0 kg mass at the end of the 3.0 sec interval?
A. 18 m/s to the WEST B. 6.0 m/s to the WEST C. 0.0 m/s D. 6.0 m/s to the EAST E. 18 m/s to the EAST
Asteroid 433 Eros is one of the largest near-Earth asteroids. For purposes of this problem, assume it is spherical. The value of g at its surface is 0.00600 m/s2 and the escape velocity is only 9.95 m/s. What is the radius of Eros?
A) 8250 m B) 16,000 m C) 1600 m D) 800 m E) 400 m
The universe expanded by a factor of 1050 during inflation, when the strong force separated from the electromagnetic and weak nuclear forces
Indicate whether the statement is true or false
What did the Greek philosopher Philolaus believe about the Universe? a. No parallax seen of new stars means Earth is the center of the Universe. b. Perfect heavens must be made of up spheres rotating at constant rates. c. The most perfect geometrical form was the sphere
d. The heavens are perfect and Earth is imperfect. e. Earth moved around a central fire.