Eratosthenes used simple geometry to determine the distance between Alexandria to Syene so that he could calculate Earth's_______________
Fill in the blank(s) with correct word
circumference, radius
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For an object that travels at a fixed speed along a circular path, the acceleration of the object is
A) larger in magnitude the smaller the radius of the circle. B) in the same direction as the velocity of the object. C) smaller in magnitude the smaller the radius of the circle. D) in the opposite direction of the velocity of the object. E) zero.
Which of these gets so bright as to be seen in daylight at times?
A) Venus B) Jupiter C) Mars D) Saturn E) Mercury
Find the frequency of X-rays of wavelength 1 Å = 10?10 m
a. 3 × 10^18 Hz b. 3 × 10^10 MHz c. 6 × 10^9 Hz d. 3 × 10^8 Hz e. 3 × 10^20 Hz
The Pleistocene epoch is also referred to as the ______________
Fill in the blank(s) with correct word