Why is falsifiability desirable in a scientific model?
What will be an ideal response?
It is not only desirable, it is essential. If we cannot show that something is
incorrect, we can never tell whether or not it works at all. But science works by discarding
inadequate models. It is to be hoped that the student answer will include this point.
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An electron is accelerated from rest through a potential difference. After acceleration the electron has a wavelength of 880 nm. What is the potential difference responsible for the acceleration of the electron?
(h = 6.626 × 10-34 J ? s, melectron = 9.11 × 10-31 kg, e = 1.6 10-19 C) A) 1.9 × 10-6 V B) 1.7 × 10-6 V C) 2.2 × 10-6 V D) 2.5 × 10-6 V
Main sequence stars have radii ranging from about 0.03 solar radius to 30 solar radius
Indicate whether the statement is true or false
Single-Slit Diffraction: 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
If Earth did not spin, the magnetic field around it would not exist.
Answer the following statement true (T) or false (F)