In the double-slit experiment, the entire matter field or EM field instantaneously collapses to the single interaction point when the field interacts with the screen. This is an example of
A) quantum annihilation.
B) quantum tunneling.
C) quantum uncertainty.
D) quantum interference.
E) quantum nonlocality.
E
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Why is dark matter called "dark matter"?
A) It does not interact strongly with light, but it does have gravity like other matter. B) It is made from black holes. C) It absorbs all light and exerts gravity. D) The name is misleading because it is pure energy rather than matter.
A jogger is running outdoors on a cold day when the temperature is -20.0°C. Each time she breathes, she inhales 0.00450 m3 of air
She is breathing at the rate of 25 breaths per minute. How much heat does she lose from breathing during 20.0 minutes of jogging if the air in her lungs is heated to body temperature (37°C) before it is exhaled? The specific heat of air is 1020 J/(kg?K) and the density of air is 1.29 kg/m3. A) 169 kJ B) 278 kJ C) 354 kJ D) 431 kJ E) 543 kJ
In addition to the electric force law and the magnetic force law, the other key principle that is needed to explain electromagnetic waves is
A) electromagnetic forces can be felt across a distance. B) Newton's law of motion. C) electromagnetic fields are established instantaneously. D) forces always come in pairs, so for every sender of electromagnetic force there must be a receiver. E) electromagnetic fields are not established instantaneously.
If two slide projectors are connected in parallel across the same 120 volt source, the current drawn from the source is __________
Fill in the blank(s) with correct word