Which two phrases describe critical thinking skills used in the pursuit of science?
A. Applying logic to decide which answer to a question is most likely
to be true
B. Reading scientific papers in order to pursue personal interests
C. Using knowledge and experience to interpret an observation of a
phenomenon
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D. Developing a philosophical argument for encouraging interest in
answering scientific questions
E. Evaluating various solutions to scientific problems based on
ethical considerations

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Diamond will scratch quartz. true or false

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?