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

Physics & Space Science

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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.

Physics & Space Science

Which of these gets so bright as to be seen in daylight at times?

A) Venus B) Jupiter C) Mars D) Saturn E) Mercury

Physics & Space Science

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

Physics & Space Science

The Pleistocene epoch is also referred to as the ______________

Fill in the blank(s) with correct word

Physics & Space Science