A steam turbine is an example of a heat mover
Indicate whether the statement is true or false
F
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Free Fall: A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Which of the following statements about the direction of the velocity and acceleration of the ball as it is going up is correct?
A. Both its velocity and its acceleration point upward. B. Its velocity points upward and its acceleration points downward. C. Its velocity points downward and its acceleration points upward. D. Both its velocity and its acceleration points downward.
Describe the reasoning leading to the idea that the number of technological civilizations in the galaxy is equal to the average lifetime of a technological civilization
What will be an ideal response?
The star named Sheat is of M2 II spectral type and luminosity class. Based on this information, which of the following are true? I. Sheat has a surface temperature less than the sun. II. Sheat has a diameter that is greater than that of the sun. III. Sheat is more luminous than the sun. IV. Sheat is located near the upper left hand corner in the HR diagram
a. I & II b. II & IV c. II, III, & IV d. I, II, & III e. I, II, III, & IV
Bohr's atomic theory predicted energy levels for hydrogen of En = (2 ?2 k2 e4m)/(hn)2. If instead we place 1 electron in "orbit" about a bare nucleus of atomic number Z, how do you expect Z to be incorporated into the En formula and why?
What will be an ideal response?