The quark structure of the neutron is udd
Indicate whether the statement is true or false
T
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Rapidly increasing demands for natural resources, employment, education, and social services make any attempts to protect natural resources and improve living standards very difficult
What will be an ideal response?
The radius of the earth’s (almost circular) orbit around the sun is 150,000,000 km, and it takes 1 y for the earth to go around the sun. Imagine that a certain satellite goes in an almost circular orbit of radius 15,000 km around the earth (this radius is 10,000 times smaller than the earth’s orbital radius around the sun). What is the period of this orbit?
A. 10-6 y B. 10-4 y C. 10-3 y D. 106 y E. These periods are not related in any simple way.
PET is an abbreviation for
A) photon-electron tunneling. B) positron emission tomography. C) photon emission tunneling. D) photon emission tomography. E) pericranial electromagnetic technique.
Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is also doubled, then the force will be
A) F. B) 2 F. C) F/2. D) F/4. E) none of the above