Applications to Astronomy: The earth's orbit has a mean radius of 1.5 × 108 km. Over a six-month period, the apparent position of a particular star varies by 0.00014° due to parallax. How many light-years is this star from Earth? (1 ly = 9.46 × 1015 m)
A. 0.13 ly
B. 1.3 ly
C. 13 ly
D. 130 ly
Answer: C
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A block lies on a horizontal frictionless surface. A horizontal force of 100 N is applied to the block giving rise to an acceleration of 3.0 m/s2
(a) Determine the mass of the block. (b) Calculate the distance the block will travel if the force is applied for 10 s. (c) Calculate the speed of the block after the force has been applied for 10 s. What will be an ideal response?
If the distance to the moon were halved, then the force of attraction between the earth and moon would be
A. quartered. B. halved. C. doubled. D. quadrupled.
Internal heat forces Earth's liquid core to circulate with _______________
Fill in the blank(s) with correct word
At what speed is the momentum of an object five times that found classically?
a. 0.894c b. 0.960c c. 0.980c d. 0.800c e. 0.999c