What was deBroglie's revolutionary idea about atomic structure?
a. Electrons orbit a nucleus.
b. The atom is like a plum pudding with electrons stuffed into a positively-charged shell.
c. Photons behave like waves.
d. Electrons behave like waves.
e. It is not possible to specify the position and momentum of a photon both exactly at the same time.
d
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A diffraction grating has 6000 lines per centimeter ruled on it
What is the angular separation between the second and the third orders on the same side of the central order when the grating is illuminated with a beam of light of wavelength 550 nm? A) 12.3° B) 20.5° C) 30.5° D) 40.5° E) 50.5°
Part of a wreck from a ship weighs 500 N. It displaces 100 N of fluid. The buoyant force acting on it is
1) 100 N. 2) 250 N. 3) 500 N. From this we can see that the buoyant force is equal to the 4) weight of the submerged object. 5) volume of fluid displaced. 6) difference between the weight of the object and the weight of fluid. 7) weight of fluid displaced.
A 1000-kg automobile moving with a speed of 24 m/s relative to the road collides with a 500-kg automobile initially at rest. If the two stick together, what is the velocity in m/s of the two cars after the collision according to an observer in a truck moving 10 m/s in the same direction as the moving cars?
A. 6 B. 11 C. 24 D. 26 E. 31
We are at ________ in January, when we are closest to the Sun in our elliptical orbit
Fill in the blank(s) with correct word