Identical 8.0-mC point charges are positioned on the x axis at x = ±1.0 m and released from rest simultaneously. What is the kinetic energy of either of the charges after it has moved 2.0 m?
a. 84 mJ
b. 54 mJ
c. 96 mJ
d. 63 mJ
e. 48 mJ
C
Physics & Space Science
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An ideal transformer has an input voltage of 20,000 V and an output voltage of 260 V. If the input current is 26.0 A, what is the output current?
A. 1.70 A B. 10.0 A C. 100 A D. 200 A E. 2000 A
Physics & Space Science
Smooth rolling plains, modest highlands and lowlands, and no water describes the surface of ________
Fill in the blank(s) with correct word
Physics & Space Science
Which of the following conditions makes stars appear dim?
A) The scattering of light by the dust in clouds B) The luminosity of the neighboring star C) The increasing mass of all the stars D) The gravitational force from the planets
Physics & Space Science
A radioactive sample has a half-life of 10 min. What fraction of the sample is left after 40 min?
A) 1/2 B) 1/4 C) 1/8 D) 1/16
Physics & Space Science