The radius of a typical nucleus is about 5.0 × 10-15 m. Assuming this to be the uncertainty in the position of a proton in the nucleus, estimate the uncertainty in the proton's energy (in eV)
A)
0.2 MeV
B)
0.4 MeV
C)
0.6 MeV
D)
0.8 MeV
E)
1.0 MeV
D
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Kepler's Laws: The planet Jupiter is 7.78 × 1011 m from the sun. How long does it take for Jupiter to orbit once about the sun given that the distance from the earth to the sun is 1.50 × 1011 m?
A. 2.3 years B. 5.2 years C. 6.0 years D. 12 years E. 27 years
Novae are more closely related to type II than to type I supernovae
Indicate whether the statement is true or false
How do we think the "hot Jupiters" around other stars were formed?
A) Many planets were formed around the star but coalesced into a single planet close in. B) They formed as dense, rocky planets close to the star in the same orbits that they are seen today. C) They formed as gas giants beyond the frost line and then migrated inwards. D) They formed as gas giants close to the star in the same orbits that they are seen today.
The star Rho Cancri B has about the same mass as our Sun, and the planet discovered around it orbits somewhat closer than Mercury orbits our Sun. The mass of the planet is estimated to be 1.1 times the mass of Jupiter
Why, according to our theory of solar system formation, is it surprising to find a planet the size of Rho Cancri B's planet orbiting at this distance?