What happens in the double-slit experiment with electrons if we place an electron detector just behind one of the slits?
A) This tells us which slit each electron comes through, and has no effect on the pattern formed on the screen.
B) This tells us which slit each electron comes through, but it also changes the pattern formed on the screen.
C) This provides no information concerning which slit each electron comes through, but it does change the pattern formed on the screen.
D) This provides no information concerning which slit each electron comes through, and has no effect on the pattern formed on the screen.
E) We can then predict the precise point at which the electron will strike the screen.
B
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A boat is floating in a small pond. The boat then sinks so that it is completely submerged. What happens to the level of the pond?
a. It increases. b. It decreases. c. It stays the same. d. In some cases it would decrease, in others it would stay the same. e. In some cases it would increase, in others it would stay the same.
In a circuit, a current of 1.10 A is drawn from a battery. The current then divides and passes through two resistors in parallel. One of the resistors has a value of 66 ? and the current through it is 0.480 A. What is the value of the other resistor?
a. 28.8 ? b. 51.1 ? c. 151 ? d. 20.1 ?
As a tile falls from the roof of a building to the ground its momentum is conserved
A) True B) False
Which has the greatest number of molecules?
A) 28 g of nitrogen, N2 B) 32 g of oxygen, O2 C) 32 g of methane, CH4 D) 38 g of fluorine, F2