The overall helium fusion reaction is
A) three helium nuclei fusing to form one carbon nucleus.
B) two helium nuclei fusing to form one beryllium nucleus.
C) two hydrogen nuclei fusing to form one helium nucleus.
D) four helium nuclei fusing to form one oxygen nucleus.
A) three helium nuclei fusing to form one carbon nucleus.
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Compare the graph above to Figure 8.14, which shows the decay of potassium-40. Which element is more radioactive (undergoes radioactive decay more quickly)?
A) uranium-235 B) potassium-40 C) Both are equally radioactive.
A circular loop of radius 0.10 m is rotating in a uniform external magnetic field of 0.20 T. Find the magnetic flux through the loop due to the external field when the plane of the loop and the magnetic field vector are (a) parallel
(b) perpendicular. (c) at an angle of 30° with each other.
A 8.0-?F uncharged capacitor is connected in series with a 6.0-k? resistor, an ideal 20-V dc source, and an open switch. If the switch is closed at time t = 0.0 s, what is the charge on the capacitor at t = 9.0 ms?
A) 0 C B) 37% of the minimum charge C) 68% of the minimum charge D) 96% of the maximum charge E) 17% of the maximum charge
An automobile manufacturer claims that its product will, starting from rest, travel 0.40 km in 9.0 s. What is the magnitude of the constant acceleration required to do this?
a. 9.9 m/s2 b. 8.9 m/s2 c. 6.6 m/s2 d. 5.6 m/s2 e. 4.6 m/s2