Initially, fewer neutrinos were detected than predicted by theoretical models because
A) neutrinos changed form to undetected types of neutrinos.
B) the wrong liquid was being used in neutrino detectors.
C) particle physicists did not understand the proton-proton chain.
D) the proton-proton chain does not actually produce neutrinos.
E) neutrinos take many years to pass out of the sun from its core.
A
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What does this figure tell us?
A) The current level of carbon dioxide in our atmosphere is higher than it has been at any time during the past 800,000 years. B) Earth is now warmer than it has been at any time during the past 800,000 years. C) The current level of carbon dioxide in our atmosphere can be attributed to natural changes in Earth's climate. D) The level of carbon dioxide in our atmosphere changes randomly with time, so there is no way to predict how it will change during the next century. E) The current level of carbon dioxide in the atmosphere and the global average temperature are both higher today than at any other time during the past 800,000 years.
Your lungs hold 4.2 L of air at a pressure of 101.3 kPa. If you are holding your breath and dive into a pool to a depth of 5.0 m below the surface of the water,
what is the volume of the air in your lungs assuming that the temperature remains the same? A) 2.8 L B) 2.9 L C) 3.2 L D) 3.3 L E) 3.5 L
The work performed as a function of time for a process is given by W = at3 where a = 2.4 J/s3. What is the instantaneous power output at t = 3.7 s?
A) 99 W B) 69 W C) 138 W D) 207 W
How many turns should a 10-cm long solenoid have if it is to generate a 1.5 × 10-3 T magnetic field on 1.0 A of current?
A) 12 B) 15 C) 120 D) 1200 E) 3200