In the context of the stars in binary systems, which of the following statements is true of the Roche lobes?
A) Binary stars do not permit the transfer of mass from one star to the other.
B) Matter inside a star's Roche lobe can be transferred to the companion star.
C) A star's Roche lobe prevents any matter from outside the lobe from being lost.
D) The Roche lobes can interfere with the evolution of the stars that are close together.
D
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According to the nebular theory, how did the asteroid belt form?
A) It is made of planetesimals that formed beyond Neptune's orbit and never accreted to form a planet. B) It is made of planetesimals between the orbits of Mars and Jupiter that never formed into a planet. C) It consists of objects that fragmented from the protosun during a catastrophic collision early in the formation of the solar system. D) It is made of planetesimals formed in the outer solar system that were flung into distant orbits by encounters with the jovian planets. E) It is material left over from the interstellar cloud that never contracted with the rest of the gases to form the solar nebula.
Why argument did the Aristotelian school present to reject the concept of Aristarchus that the Earth could be revolving around the Sun? Why was it wrong?
What will be an ideal response?
A skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 12° with the horizontal. The rope moves parallel to the slope with a constant speed of 1.0 m/s. The force of the rope does 900 J of work on the skier as the skier moves a distance of 8.0 m up the incline.
(a) If the rope moved with a constant speed of 2.0 m/s, how much work would the force of the rope do on the skier as the skier moved a distance of 8.0 m up the incline? At what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 1.0 m/s and (c) 2.0 m/s?
Anders and Taisen release their snowballs from the same height and at the same time. Ander's is dropped while Taisen’s is thrown horizontally. Which one hits the ground first?
A. the "dropped" snowball B. the "thrown" snowball C. they hit at the same time D. it depends on how hard Taisen threw E. it depends on the initial height