The oldest easily identifiable fossils appear in sedimentary rocks that formed 3.4 billion years ago during the ____________________ period

Fill in the blank(s) with correct word


precambrian

Physics & Space Science

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A billiard ball traveling at 3.00 m/s collides perfectly elastically with an identical billiard ball initially at rest on the level table. The initially moving billiard ball deflects 30.0° from its original direction

What is the speed of the initially stationary billiard ball after the collision? A) 2.00 m/s B) 0.866 m/s C) 1.50 m/s D) 2.59 m/s E) 0.750 m/s

Physics & Space Science

The brilliancy of a gem is a function of its index of ______________

Fill in the blank(s) with correct word

Physics & Space Science

What makes some astronomers think that Uranus was hit by a large body early in its history?

A. It has no moons. B. It goes around the Sun in a direction opposite to the other planets. C. Its composition is so different from those of Neptune, Jupiter, and Saturn. D. Its rotation axis has such a large tilt with respect to its orbit. E. All of these choices are correct.

Physics & Space Science

Power: A series ac circuit has a peak current of 1.0 A with a frequency of 7 kHz. If the resistance of the circuit is 55 k?, the capacitance of the circuit is 20 ?F, and the inductance of the circuit is 26 H, determine the average power of the circuit over one cycle.

A. 28,000 W B. 83,000 W C. 8300 W D. 4400 W

Physics & Space Science