Newtonian physics, coupled to the idea that everything is made of atoms, has led many scientists and philosophers to the conclusion that everything in the universe, including all human actions and human feelings, is pre-determined by the laws of
physics and acts just like a machine. Which of the following statements is a scientifically-acceptable reason for disagreeing with this conclusion?
A) Isaac Newton himself believed that humans have free will.
B) We should never accept scientific theories as absolute truth.
C) Both of the above.
D) Our own intuitions, or beliefs, inform us that we actually do have free will.
E) None of the above.
B
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The main difference between sand dunes and ripple marks is
A) ripple marks are only caused by water. B) ripple marks are larger than sand dunes. C) sand dunes are larger than ripple marks. D) ripple marks are stationary.
In an experiment different wavelengths of light, all able to eject photoelectrons, shine on a freshly prepared (oxide-free) zinc surface. Which statement is true?
a. The number of photoelectrons emitted per second is independent of the intensity of the light for all the different wavelengths. b. The number of photoelectrons emitted per second is directly proportional to the frequency for all the different wavelengths. c. The maximum kinetic energy of the photoelectrons emitted is directly proportional to the frequency for each wavelength present. d. The maximum kinetic energy of the photoelectrons has a linear relationship with the frequency for each wavelength present. e. The maximum kinetic energy of the photoelectrons is proportional to the intensity of the light and independent of the frequency.
When something is thrown over large distances (on Earth), what new factor comes into play?
a. The curvature of the Earth. b. The increase in gravity over long distances. c. The decrease in gravity over long distances. d. The tendency of thrown objects to fall to the ground. e. The difference between miles and kilometers.
Ethanol is to be boiled in a tube. If the tube temperature is expected to be 450 K, and ethanol boils at 351.5 K, what is the superheat?
What will be an ideal response?