What can we learn about a star from a life track on an H-R diagram?
A) the surface temperature and luminosity the star will have at each stage of its life
B) the star's age
C) the star's current stage of life
D) how the star's distance from Earth varies at different times in its life
A) the surface temperature and luminosity the star will have at each stage of its life
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The root-mean-square speed (thermal speed) for a certain gas at 100°C is 0.500 km/s. If the temperature of the gas is now increased to 200°C, the root-mean-square (thermal) speed will be closest to
A) 563 m/s. B) 634 m/s. C) 707 m/s. D) 804 m/s. E) 1000 m/s.
A bullet moving horizontally with a speed of 500 m/s strikes a sandbag and penetrates a distance of 10 cm
(a) What is the average acceleration of the bullet? (b) How long does it take to come to rest?
The leveling of the Earth's surface is known as ______________
Fill in the blank(s) with correct word
Kinetic energy refers to the energy of a(n)____
a. stationary body b. moving body c. moon d. gravitational field e. object due to its position