An LED emits light of wavelength 600 nm. What is its band gap?

a. 1.11 eV
b. 1.54 eV
c. 1.99 eV
d. 2.07 eV
e. 2.33 eV


d

Physics & Space Science

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Which of the following can make a string of carbon atoms a living thing?

A) The ability of carbon to act as a living thing independently B) The ability of oxygen to act as a living thing when combined with carbon C) The transmission of information from one carbon molecule to another D) The transfer of electrons from one carbon molecule to another

Physics & Space Science

The innermost satellite of Jupiter orbits the planet with a radius of 422 × 103 km and a period of 1.77 days. What is the mass of Jupiter? (G = 6.67 × 10-11 N ? m2/kg2)

A) 1.33 × 1027 kg B) 1.50 × 1027 kg C) 1.72 × 1027 kg D) 1.89 × 1027 kg E) 3.08 × 1027 kg

Physics & Space Science

When the number of turns in a solenoid and its length are both doubled, the ratio of the magnitude of the new magnetic field inside to the magnitude of the original magnetic field inside is:

a. 0.25 b. 0.50 c. 1 d. 2 e. 4

Physics & Space Science

The complete cycle of lunar phases takes 29.53 days, also known as the Moon's ____________________ period

Fill in the blank(s) with correct word

Physics & Space Science