A photon whose energy is 8.00 × 10^?15 J is scattered off an electron at a 90° angle. What is the wavelength of the scattered wave?
a. 2.73 × 10^?11 m
b. 2.25 × 10^?11 m
c. 2.50 × 10^?11 m
d. 2.40 × 10^?12 m
e. 2.48 × 10^?11 m
a
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Which of the following best describes the structure of an atom?
A. A positively charged nucleus circled by widely spaced negatively charged particles B. A neutral nucleus circled by particles with positive and negative charges C. A nucleus that is mostly empty space with charged particles circling around it
In a well in an unconfined aquifer, the highest level that water can rise to is
A) the level of the water table. B) just below the level of the water table. C) to the top of the well. D) dependent on how deep the well is.
Dark matter in galaxies and clusters of galaxies is purely hypothetical because we have no way of detecting its presence
Indicate whether the statement is true or false
What can we learn from the detailed shapes of craters?
What will be an ideal response?