What is a base?
A) anything that accepts a hydrogen ion
B) anything that accepts a hydroxide ion
C) anything that donates a hydroxide ion
D) anything that can be used to clean drains
E) anything with a bitter taste
Answer: A
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Doubling the magnetic field in a proton synchrotron changes the maximum kinetic energy of the protons by what amount?
A. It is quadrupled. B. It is doubled. C. It remains the same. D. it is halved E. It is quartered.
What is meant by spectral resolution?
A) It is a measure of how much energy an object emits in different parts of the electromagnetic spectrum. B) It is a measure of how close two spectral lines can be and still be distinguishable. C) It is a measure of how close two stars can be in the sky and still be distinguishable. D) It is the same as angular resolution but applied to telescopes operating at different wavelengths.
What is the ultimate fate of an isolated white dwarf?
A) It will cool down and become a cold black dwarf. B) As gravity overwhelms the electron degeneracy pressure, it will explode as a nova. C) As gravity overwhelms the electron degeneracy pressure, it will explode as a supernova. D) As gravity overwhelms the electron degeneracy pressure, it will become a neutron star. E) The electron degeneracy pressure will eventually overwhelm gravity and the white dwarf will slowly evaporate.
Two blocks of masses m1 and m2 are released from the top of two frictionless inclined planes of the same height making 30° and 60° angles with the horizontal direction, respectively
Which of the blocks is going faster when it reaches the bottom of its respective incline? A) We must know the actual masses of the blocks to answer. B) Both blocks have the same speed at the bottom. C) Block 1 is faster. D) Block 2 is faster. E) There is not enough information to answer the question.