Two stars have the same luminosity. Star X is spectral type F, while Star Y is spectral type K. Star X must be larger in radius than Star Y
Indicate whether the statement is true or false
FALSE
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A metal sphere of radius 2.0 cm carries a charge of 3.0 ?C. What is the electric field 6.0 cm from the center of the sphere?
A) 4.2 × 106 N/C B) 5.7 × 106 N/C C) 6.4 × 106 N/C D) 7.5 × 106 N/C E) 9.3 × 106 N/C
A student slides her 80.0-kg desk across the level floor of her dormitory room a distance 2.00 m at constant speed. If the coefficient of kinetic friction between the desk and the floor is 0.400, how much work did she do?
A) 64.0 J B) 1.57 kJ C) 26.7 J D) 628 J E) 24.0 J
If a metal had a Fermi level (energy) of 5.0 eV, what would be the average energy of the electrons at 0 K?
A) 5.0 eV B) 3.0 eV C) 8.0 eV D) 6.0 eV E) 0.00 eV
State the work-energy theorem
What will be an ideal response?