Stars with masses greater than 1.1 solar masses use the ____________________ to convert hydrogen into helium and produce energy
Fill in the blank(s) with correct word
CNO cycle
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The circuit below contains 4 100-W light bulbs. The emf is 110 V. Which light bulb(s) is(are) brightest?
a.
A
b.
B
c.
C
d.
D
e.
C and D
Derive an expression for the heat transfer from a tapered fin having base of Y thickness, L length, ? thermal conductivity, h0 convective coefficient, and T0 base temperature. The surrounding fluid temperature is T? .
What will be an ideal response?
A beam of electrons is accelerated through a potential difference of 10 kV before entering a region having uniform electric and magnetic fields that are perpendicular to each other and perpendicular to the direction in which the electron is moving
If the magnetic field in this region has a value of 0.010 T, what magnitude of the electric field is required if the particles are to be undeflected as they pass through the region? A) 2.3 × 103 V/m B) 7.9 × 103 V/m C) 5.9 × 105 V/m D) 6.0 × 105 V/m E) 7.2 × 106 V/m
The gravitational lens effect has been verified by
A) observations of multiple images of the same background galaxy seen towards a massive galaxy cluster. B) single images of highly distorted, high-redshift galaxies seen towards massive galaxy clusters. C) observations of the bending of starlight by the Sun during a 1919 eclipse. D) all of the above E) None of the above; this effect is purely hypothetical.