Where do scientists think that Jupiter's strong magnetic field is generated?
A) in its rocky core
B) in its metallic hydrogen layer
C) in its liquid hydrogen layer
D) in its gaseous hydrogen layer
E) above the cloudtops
B) in its metallic hydrogen layer
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Compton Scattering: X-rays of wavelength 0.20 nm are scattered by a free electron. The change in the wavelength of the x-rays is observed to be 2.0 × 10-12 m at a certain scattering angle measured relative to the incoming x-ray direction. What is the scattering angle of the x-rays? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 20° B. 40° C. 60° D. 80°
Pluto was discovered in
A) ancient times. B) 1789. C) 1859. D) 1930. E) 1992.
The diagram below shows five thin cylindrical shells, each shell rotating with constant angular velocity about its central axis. The magnitude of the tangential speed of one point of each cylinder is shown, along with each cylinder's radius and mass. Which cylindrical shell has the largest angular momentum?
a.
b.
An effective way to passively cool a house is to _______
a. open all the windows b. use a light colored roofing material c. use concentrating collectors to provide air conditioning d. add more insulation on the south side of the house e. use thermal storage mass