If the velocity versus time graph of an object is a straight line making an angle of +30° (counter clockwise) with the time axis, the object is

A) moving with constant non-zero speed.
B) moving with constant non-zero acceleration.
C) at rest.
D) moving with increasing acceleration.


B

Physics & Space Science

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Blue stars are always more luminous than red stars

Indicate whether the statement is true or false

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In the "Coral Model" of galactic colonization, if we assume that colonizing ships can travel at a few percent of the speed of light, then we might expect all of the habitable planets in the galaxy to be colonized within a few

A) tens of billions of years B) billion of years C) hundred thousand years D) tens of millions of years

Physics & Space Science

The Big Bang occurred

a. about 15 to 20 billion years ago. b. about 5 to 7 thousand years ago. c. about 4 to 6 billion years ago. d. infinitely far in the past.

Physics & Space Science

A scientist is investigating the results of varying temperature on the growth rate of a bacterial culture. In this experiment, temperature is the:

a. dependent variable b. independent variable c. control d. model e. hypothesis

Physics & Space Science