In beta decay, the emitted particle is

a) an electron
b) a photon of electromagnetic energy.
c) a hydrogen nucleus.
d) the nucleus of a helium atom.


a

Physics & Space Science

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An astronomical unit (AU) is

A) any very large unit, such as a light-year. B) the average distance between Earth and the Sun. C) the current distance between Earth and the Sun. D) the average distance between any planet and the Sun.

Physics & Space Science

A steam engine is operating at its theoretical maximum efficiency of 60%. If the waste heat has a temperature of 100°F (38°C), what is the temperature of the boiler?

A. 350°C B. 94°C C. 225°C D. 504°C E. 775°C

Physics & Space Science

If you stood on a planet having a mass four times higher than Earth's mass, and a radius two times longer than Earth's radius, you would weigh

A) the same as you do on Earth. B) two times more than you do on Earth. C) two times less than you do on Earth. D) four times more than you do on Earth.

Physics & Space Science

A series circuit consists of a 100-? resistor, a 10.0-?F capacitor, and a 0.350-H inductor. The circuit is connected to a 120-V rms, 60-Hz power supply. What is the rms current in the circuit?

A) 0.42 A B) 0.52 A C) 0.62 A D) 0.72 A

Physics & Space Science