Which of the following statements is true of the third reaction in the proton-proton chain?
A) It yields a helium atom.
B) It emits a neutrino.
C) It emits a gamma ray.
D) It yields carbon dioxide.
A
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The field just outside the surface of a long conducting cylinder which has a 2.0-cm radius points radially outward and has a magnitude of 200 N/C. What is the charge density on the surface of the cylinder?
a. 2.7 nC/m2 b. 1.8 nC/m2 c. 3.5 nC/m2 d. 4.4 nC/m2 e. 0.90 nC/m2
What is the lowest frequency that will resonate in an organ pipe 1.00 m in length, closed at one end? The speed of sound in air is 340 m/s
a. 42.5 Hz c. 170 Hz b. 85.0 Hz d. 680 Hz
A billiard ball is moving in the x-direction at 33.4 cm/s and strikes another billiard ball moving in the y-direction at 38.9 cm/s. As a result of the collision, the first ball moves at 50.6 cm/s, and the second ball stops. In what final direction does the first ball move?
a. in the x-direction b. at an angle of 49.4° ccw from the x-direction c. at an angle of 40.6° ccw from the x-direction d. at an angle of 56.6° ccw from the x-direction e. Such a collision cannot happen.
An airplane increases its speed at the average rate of 15 m/s2. How much time does it take to increase its speed from 100 m/s to 160 m/s?
A) 17 s B) 0.058 s C) 4.0 s D) 0.25 s