Relate a nova and a Type I supernova
What will be an ideal response?
Both are the result of a binary system consisting of a white dwarf and a stellar companion. If less than 1.4 solar masses, the white dwarf will blow off a shell of accreted matter in a nova explosion. But if enough mass is added to the white dwarf to push it over Chandrasekhar's limit, it will explode as a Type I supernova.
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RC Circuits: When an initially uncharged capacitor is charged through a 25-k? resistor by a 75-V dc ideal power source, it takes 0.23 ms for the capacitor to reach 50% of its maximum charge? What is the capacitance of this capacitor?
Fill in the blank(s) with the appropriate word(s).
Once the helium flash occurs at stage 10, the star stabilizes again on the horizontal branch of the H-R diagram, but now hundreds of times as bright as on the main sequence
Indicate whether the statement is true or false
The vector sum of three co-planar forces
a. must be zero. b. must be perpendicular to one of the three. c. must be parallel to one of the three. d. must be perpendicular to the plane. e. may have any direction in the plane.
Atmospheric pressure is 1.00 × 10^5 N/m2, and the density of air is 1.29 kg/m3 . If the density of air is constant as you get higher and higher, calculate the height of the atmosphere needed to produce this pressure
a. 1 260 m b. 77 000 m c. 7 900 m d. 10 300 m