A plastic rod is rubbed with fur. The rod is then touched to the metal knob of an electroscope. The sign of the charge on the electroscope after contact is ________.
Fill in the blank(s) with the appropriate word(s).
negative
Negative
Physics & Space Science
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What is the photon energy of red light having a wavelength of 6.40 × 102 nm? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A) 1.13 × 10-19 J B) 1.31 × 10-19 J C) 3.11 × 10-19 J D) 1.94 × 10-19 J
Physics & Space Science
All three types of particles found in atoms are electrically charged
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
________ is the most significant force that determines the evolution of stars.
A. Energy B. Gravity C. Luminosity D. Temperature
Physics & Space Science
The mass of the black hole in the center of the galaxy has been determined by observing the motion of stars orbiting it
a. True b. False Indicate whether the statement is true or false
Physics & Space Science