For uniform circular motion, the velocity and acceleration vectors are perpendicular to each other at every point in the path
Indicate whether the statement is true or false
TRUE
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If a star's pressure increases in its interior to push the star outward, its temperature will drop, causing the star to contract and eventually return to equilibrium
a. True b. False Indicate whether the statement is true or false
A bat chirps to locate a tasty lunch. The chirp travels at 340 m/s and its echo is heard 1 s after the chirp. Distance to the lunch is
A) 85 m. B) 170 m. C) 340 m.
In interactions taking place by the weak force, which of the following quantities are conserved?
a. electric charge b. baryon number c. mass-energy d. strangeness e. linear momentum f. angular momentum (spin)
Which of the following statements is true of the solar wind?
A) It makes the Sun gain mass. B) It can be considered an extension of the corona. C) It makes the gases from the solar atmosphere flow along the magnetic fields that point inward. D) It refers to slow-moving atoms and ions that enter the solar corona.