What is the mass of a woman who weighs 110 lb?
A) 50 kg
B) 55 kg
C) 73 kg
D) 110 kg
E) 242 kg
A
Physics & Space Science
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A material has an energy gap of 2.5 eV. What energy photons in the visible range (1.8 eV to 3.6 eV) would excite electrons into the conduction band?
A) 1.8 eV B) 2.5 eV C) 1.8 eV up to 2.5 eV D) 2.5 eV up to 3.6 eV E) 1.5 eV
Physics & Space Science
The approximate main-sequence lifetime of a star of spectral type O is
A) 3 million years. B) 10,000 years. C) 300 million years. D) 10 billion years.
Physics & Space Science
Water has its ________ density at 4.°C
A) average B) maximum C) minimum
Physics & Space Science
If a object is placed between a convex lens and its focal point, the image formed is
A) real and inverted. B) real and upright. C) virtual and upright. D) virtual and inverted.
Physics & Space Science