A car starts from rest and after 10 seconds is traveling at 30 m/s. Assuming that it continues to accelerate at the same rate it will take another ________ seconds to reach 60 m/s.
Fill in the blank(s) with the appropriate word(s).
10
ten
10.0
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Which of the following does NOT happen to any of the material in the protoplanetary disk?
A. it is sucked in to a black hole at the center of our Solar System B. it gets incorporated into the star at the center, the Sun C. it is accreted onto planets in the Solar System D. it first falls into small irregularities and later these clumps grow into larger structures E. it is blown out by the solar wind
A sodium light (? = 589.3 nm) is used to view a soap film to make it look black when directed perpendicular to the film. What is the minimum thickness of the soap film if the index of refraction of soap solution is 1.38?
A) 114 nm B) 194 nm C) 294 nm D) 314 nm E) 214 nm
As measured from the Earth, a spacecraft is moving at speed 0.80c toward another spacecraft moving at speed 0.60c in the same direction, i.e., the first spacecraft is catching up with the second spacecraft. What is the speed of the first spacecraft as viewed from the second spacecraft?
a. 0.38c b. –0.20c c. –0.38c d. not given
Assure competent workforce
What will be an ideal response?