According to Galileo, the test of scientific truth is
A) experiment.
B) philosophical discussion.
C) evident patterns in nature.
D) logic.
Answer: A
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Imagine that the wave shown below moves right along a stretched string. It meets and passes through one of the left-going waves provided in the choices. For which choice is there an instant where the string is flat?
A. A
B. B
C. C
D. D
E. None of the above
Using monochromatic light of 410 nm wavelength, a single thin slit forms a diffraction pattern,
with the first minimum at an angle of 40.0° from central maximum. The same slit, when illuminated by a new monochromatic light source, produces a diffraction pattern with the second minimum at a 60.0° angle from the central maximum. What is the wavelength of this new light? A) 276 nm B) 293 nm C) 309 nm D) 326 nm E) 342 nm
The symbol for the element whose atoms contain 28 protons is ______________
Fill in the blank(s) with correct word
What is the proper abbreviation for ‘kilohertz?'
a. kh b. khz c. Khz d. KHz e. kHz