Why is ten million degrees critical to the proton-proton cycle?
What will be an ideal response?
At temperatures less than this, the protons repel each other before the strong nuclear force can fuse them together to start the process the Sun shines by.
You might also like to view...
Which would require the greater energy; slowing the orbital speed of a satellite so it crashes into Earth, or increasing the orbital speed so it escapes Earth?
A) slowing down B) speeding up C) same each way
A physicist claims that she has found a new particle with a mass 200,000 times the mass of the proton (1.67 × 10?27 kg) and a charge of 3.20 × 10?19 C. If she is correct, such a particle traveling in a circle in a uniform 5.00-T magnetic field at a velocity of 2 500 m/s will have a radius of
A. 0.261 m. B. 0.522 m. C. 1.04 m. D. 3.27 m. E. 3.13 × 1026 m.
The general formula 
is that of
a.
an amide.
b.
an alkyl halide.
c.
an alcohol.
d.
none of these
An 8.00 kg object has a moment of inertia of 1.50 kg 
If a torque of 2.00 N•m is applied to the object, the angular acceleration is
A. 0.750 
B. 1.00
C. 1.33
D. 2.01
E. 2.67