Which of these would be represented by a vector?
a. fifteen feet north
b. speed
c. volume
d. time
e. distance
a
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On the H-R diagram, lines of constant radius are illustrated as _____
a. sloping downward from right to left b. sloping downward from left to right c. running vertically on the right side d. running horizontally on the top e. moving in various direction depending on the type of star
Elastic Collisions: A proton of mass m is at rest when it is suddenly struck head-on by an alpha particle (which consists of 2 protons and 2 neutrons) moving at speed v. If the collision is perfectly elastic, what speed will the alpha particle have after the collision? (Assume the neutron's mass is equal to the proton's mass.)
A. zero B. 2v/3 C. 3v/5 D. 5v/3
For an observer on Uranus, the ecliptic passes only a few degrees from the celestial poles
a. True b. False Indicate whether the statement is true or false
Apply Wein's law to explain the corona's main energy release
What will be an ideal response?