The Galactic center in ________ is best studied using radio and infrared observations
Fill in the blank(s) with correct word
Sagittarius
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The mass of an atom of carbon-12 (Z = 6) is less than the mass of 6 protons and 6 neutrons because of
a. nuclear fission. b. nuclear fusion. c. neutron activation. d. nuclear emission. e. binding energy.
The magnetic field at a distance of 2 cm from a long straight current-carrying wire is 4 ?T. What is the magnetic field at a distance of 4 cm from this wire?
A) 6 ?T B) 2 ?T C) 4 ?T D) 10 ?T E) 8 ?T
If the average wind speed for 24 hours is 15 mph at one site, but 10 mph for 12 hours and then 20 mph for 12 hours at another site, how much output can be expected from the same turbine situated at the first site compared to the second site?
a. three-quarters b. half c. one quarter d. one eighth e. same, since the average wind speeds are the same
About a thousand trillion neutrinos are passing through your body every second. Why don't they hurt you?
A) Neutrinos interact with ordinary matter only through the weak force. B) Their masses are too low to cause any damage. C) They are traveling too slowly to cause any damage. D) Our immune systems release antibodies that counteract the damage the neutrinos cause. E) Actually, they do—neutrinos are the cause of many cancers.