Which of the following statements about an open star cluster is true?
A) All stars in the cluster are approximately the same color.
B) All stars in the cluster are approximately the same age.
C) All stars in the cluster have approximately the same mass.
D) There is an approximately equal number of all types of stars in the cluster.
B) All stars in the cluster are approximately the same age.
You might also like to view...
Sound waves can interfere with one another so that no sound is produced.
Indicate whether the statement is true or false
A catapult fires an 800-kg rock with an initial velocity of 100 m/s at a 40° angle to the ground. The magnitude of the vertical impulse the catapult receives from the rock is
A.
s.B.
s.C.
s.D.
s.E.
s.At what Fahrenheit temperature are the Kelvin and Fahrenheit temperatures numerically equal?
Object A is acted on by only object B. The mass of object A is 20.0 kg and its acceleration is 4.00 m/s2 west. Object B is acted on by two forces, the force of object A on object B and another unknown force
If mass of object B is 40.0 kg and the acceleration of object B is 3.00 m/s2 west, what is the unknown force? A) 40 N west B) 120 N west C) 80 N east D) 200 N west E) 80 N west