Find the electric flux through the surface in the figure below

4

Physics & Space Science

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After a supernova explosion, the remains of the stellar core can be

A) either a neutron star or a black hole. B) a neutron star only. C) a black hole only. D) a white dwarf, neutron star, or black hole.

Physics & Space Science

The tidal pull of the Moon is an example of a differential force, as the near and far sides of the Earth do not experience the same gravitational pull of the Moon

Indicate whether the statement is true or false

Physics & Space Science

An inventor develops a stationary cycling device by which an individual, while pedaling, can convert all of the energy expended into heat for warming water. How much mechanical energy is required to increase the temperature of 200 g of water (enough for 1 cup of coffee) from 18°C to 94°C? (1 cal = 4.186 J, the specific heat of water is 4 186 J/kg/°C)

a. 6.4E+4 J b. 3.2E+4 J c. 1.6E+4 J d. 1.0E+3 J e. 1.5E+1 J

Physics & Space Science

Materials A, B, and C have R values of 1, 4, and 8 ft2-°F-hr/Btu, respectively. If the rate of heat transfer through material A alone is 20 Btu/hr, then the rate of heat transfer through the combination of A, B and C is _____

a. 1.5 b. 2.5 c. 4.0 d. 7.0 e. 80 Btu/hr

Physics & Space Science