At what temperature is the Celsius temperature and the Fahrenheit temperature are same?
A. 30
B. 35
C. -40
D. 45
E. -30
C. -40
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Four point charges are located at the corners of a square, 1.00 m by 1.00 m. On each of two diagonally opposite corners are 1.00 ?C charges. On each of the other two corners are -1.00 ?C charges. What is the direction of the force on each charge?
A. positive charges away from away from the center of the square, negative inward toward center B. negative charges away from away from the center of the square, positive inward toward center C. positive and negative charges both toward the center of the square D. positive and negative charges both away from the center of the square E. no direction (net force = 0)
Chromatic aberration occurs in a ____ telescope when ____
a. reflecting; different colors of light do not focus at the same point. b. refracting; different colors of light do not focus at the same point. c. reflecting; light of different wavelengths get absorbed by the mirror. d. refracting; light of different wavelengths get absorbed by the lens.
A 0.40-kg mass, attached to the end of a 0.75-m string, is whirled around in a circular horizontal path. If the maximum tension that the string can withstand is 450 N, then what maximum speed can the mass have if the string is not to break?
a. 370 m/s b. 22 m/s c. 19 m/s d. 29 m/s
A(n) ______________is denser than a neutron star
Fill in the blank(s) with correct word