What is the process in which an enzyme makes a reaction run much faster than it would on its own?
a. redox reaction
b. allosteric regulation
c. induced fit
d. catalysis
e. phosphorylation
d
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The strong force is the force that
a. binds electrons to the nucleus in an atom. b. holds the Moon in orbit around Earth. c. creates the magnetic field associated with sunspots. d. produces the extremely high temperatures in the solar corona. e. binds protons and neutrons together to form a nucleus.
Which of the following emits a spectrum very close to a blackbody spectrum?
A. an interstellar cloud B. the Sun C. a neon light
Two planets having equal masses are in circular orbit around a star. Planet A has a smaller orbital radius than planet B. Which statement is true?
A) Planet A has more kinetic energy, more potential energy, and more mechanical energy (potential plus kinetic) than planet B. B) Planet A has more kinetic energy, less potential energy, and less mechanical energy (potential plus kinetic) than planet B. C) Planet A and planet B have the same amount of mechanical energy (potential plus kinetic). D) Planet A has more kinetic energy, less potential energy, and more mechanical energy (potential plus kinetic) than planet B.
If a 20-kg object dropped in air has a terminal speed of 60 m/s, what was its acceleration at 30 m/s?
a. 9.80 m/s2 b. 7.35 m/s2 c. 4.90 m/s2 d. 2.45 m/s2 e. More information is needed to answer this question.