A bullet shot straight up returns to its starting point in 10 s. What is the initial speed of the bullet, assuming no air?
A) 9.8 m/s
B) 25 m/s
C) 49 m/s
D) 98 m/s
C
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The surface of Mercury resembles the Moon's surface in that they are both ________.
A. covered with volcanoes B. eroded by wind C. heavily cratered D. newly resurfaced
Process of Science: Scientists have not been able to observe the ultimate fate of our universe. On what evidence do they base the idea that it will expand forever?
What will be an ideal response?
The x-rays that occur when a high energy electron beam is incident on a metal target will show what type of spectrum?
a. continuous b. line c. continuous spectrum superimposed with a line spectrum d. absorption
A current reading is obtained by properly placing an ammeter in a circuit consisting of one resistor and one battery. As a result,
A) the voltage drop across the resistor increases. B) the current flowing in the circuit increases. C) the current flowing in the circuit decreases. D) the current flowing in the circuit does not change.