A Carnot cycle, operating as a heat engine, consists, in the order given, of
a. an isothermal expansion, an isothermal compression, an adiabatic expansion and an adiabatic compression.
b. an adiabatic expansion, an adiabatic compression, an isothermal expansion and an isothermal compression.
c. an isothermal expansion, an adiabatic compression, an isothermal compression and an adiabatic expansion.
d. an adiabatic compression, an isothermal compression, an isothermal expansion and an adiabatic expansion.
e. an isothermal expansion, an adiabatic expansion, an isothermal compression and an adiabatic compression.
E
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Each of the following describes an "Atom 1" and an "Atom 2." In which case are the two atoms isotopes of each other?
A) Atom 1: nucleus with 6 protons and 8 neutrons, surrounded by 6 electrons Atom 2: nucleus with 7 protons and 8 neutrons, surrounded by 7 electrons B) Atom 1: nucleus with 8 protons and 8 neutrons, surrounded by 8 electrons Atom 2: nucleus with 8 protons and 8 neutrons, surrounded by 7 electrons C) Atom 1: nucleus with 92 protons and 143 neutrons, surrounded by 92 electrons Atom 2: nucleus with 92 protons and 146 neutrons, surrounded by 92 electrons D) Atom 1: nucleus with 1 proton and 0 neutrons, surrounded by 1 electron Atom 2: nucleus with 2 protons and 2 neutrons, surrounded by 2 electrons E) Atom 1: nucleus with 4 protons and 5 neutrons, surrounded by 4 electrons Atom 2: nucleus with 5 protons and 5 neutrons, surrounded by 4 electrons
What is the speed of a proton that has been accelerated from rest through a potential difference of 4.0 kV?
a. 1.1 × 10^6 m/s b. 9.8 × 10^5 m/s c. 8.8 × 10^5 m/s d. 1.2 × 10^6 m/s e. 6.2 × 10^5 m/s
Geologists define a(n) ______________ as any flow of water occurring between well-defined banks
Fill in the blank(s) with correct word
If it takes 50 photons per 0.1 s entering the eye so that the brain senses the light, which of the following colors of light would be delivering the most power to the eye at this minimum perception level?
a. red c. blue b. violet d. All would be delivering the same power.