A hot luminous solid emits a ______________ spectrum, while a hot luminous gas produces a ______ spectrum
Fill in the blank(s) with correct word
continuous, line
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Two cables of the same length are made of the same material, except that one cable has twice the diameter of the other cable
When the same potential difference is maintained across both cables, which of the following statements are true? (There may be more than one correct choice.) A) The electrons have the same drift velocity in both cables. B) The same current flows through both cables. C) Both cables carry the same current density. D) The current in the thin cable is four times as great as the current in the thick cable. E) The current in the thin cable is twice as great as the current in the thick cable.
How far does a beam of light travel through space in one 365-day year? (c = 3.0 × 108 m/s)
A) 30 × 108 m B) 36 × 1016 m C) 95 × 1014 m D) 80 × 1012 m E) 20 × 1015 m
A particle (charge = Q) is kept in a fixed position at point P, and a second particle (charge = q) is released from rest when it is a distance R from P. If Q = +2.0 mC, q = ?1.5 mC, and R = 30 cm, what is the kinetic energy of the moving particle after it has moved a distance of 10 cm?
A. 60 kJ B. 45 kJ C. 75 kJ D. 90 kJ E. 230 kJ
The coefficient of linear expansion of copper is 17 × 10-6 K-1
A block of copper 30 cm wide, 45 cm long, and 10 cm thick is heated from 0°C to 100°C What is the change in the volume of the block? A) 2.3 × 10-5 m3 B) 4.6 × 10-5 m3 C) 5.2 × 10-5 m3 D) 6.9 × 10-5 m3 E) 13.8 × 10-5 m3