Any model of solar system formation must explain why the planets revolve in the same direction as the Sun rotates
Indicate whether the statement is true or false
TRUE
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Select the best filter for a cobalt x-ray tube that will reduce the intensity of the K? line and transmit the cobalt K? line.
(a) What are the wavelength of the cobalt K? and K? line? (b) What is your selected filter material? (c) What is the wavelength of the K absorption edge of your selected filter material?
The mass of a neutron star is
a. several time that of the Sun. b. about the same as that of the Sun. c. about the same as Earth. d. smaller than any of these.
If the mass of the Sun were cut in half, how would the force between the Sun and the Earth change?
a) it would quadruple b) it would double c) it would remain unchanged d) it would decrease by a factor of four e) it would decrease by a factor of two
Tricia puts 66 g of dry ice (solid CO2) into a 2.0-L container and seals the top. The dry ice turns to gas at room temperature (20°C). Find the pressure increase in the 2.0-L container. (One mole of CO2 has a mass of 44 g and R = 0.0821 L•atm/mol•K. Ignore the initial volume of the dry ice.)
a. 6.0 atm c. 18 atm b. 12 atm d. 2.0 atm