What is the quark structure of a proton?
a. uud
b. udd
c. uuu
d. ddd
e. the question does not make sense
a
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You are interviewing a researcher. She states that she does not publish her data from experiments because she does not trust other scientists. How would you respond? (Hint: think about one of the main steps of the scientific method)
What will be an ideal response?
Which of the following is not an example of tectonics?
A) the gradual disappearance of a crater rim as a result of wind and rain B) the formation of a cliff when the lithosphere shrinks C) the slow movement of Earth's lithospheric plates D) the stretching of the crust by underlying mantle convection
If you have two molecules of TiO2, how many oxygen atoms would you have?
A) 4 B) 2 C) 3 D) 6 E) none
Ideal Gas Law: A laboratory vacuum pump can reduce the pressure in a chamber to 1.0 × 10-7 Pa. If the volume of the chamber is 0.500 m3 and the temperature is 27°C, how many molecules are left inside the chamber? (NA = 6.022 × 1023 molecules/mol, R = 8.31 J/mol ? K)
A. 1.2 × 1013 B. 2.4 × 1013 C. 1.2 × 1012 D. 2.4 × 1012 E. 1.2 × 1014