You do 116 J of work while pulling your sister back on a fritctionless swing, whose chain is 5.1m long, until the swing makes an angle of 32.0° with the vertical. What is your sister's mass?
A) 19.0 kg B) 15.3 kg C) 13.0 kg D) 17.6 kg
B
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If star A is 14.5 times brighter than star B, then what is their magnitude difference?
a. 1.2 b. 2.9 c. 63.1 d. 800 e. 6.2 x 10^5
The orbits of Population II stars have been compared to
A) satellites around planets. B) the accretion disc around a black hole. C) binary stars. D) planets around the Sun. E) comets around the Sun.
An object moving on the x axis with a constant acceleration increases its x coordinate by 80 m in a time of 5.0 s and has a velocity of +20 m/s at the end of this time. Determine the acceleration of the object during this motion
a. -1.6 m/s2 b. +6.4 m/s2 c. +1.6 m/s2 d. -2.0 m/s2 e. -6.4 m/s2
Uranus and Neptune are very similar in size and mass
Indicate whether the statement is true or false