where do supermassive black holes likely exist? A. at the center of the solar system B. inside gas giants planets C. at the center of galaxies D. all of the above E. none of the above

What does the term greenhouse effect mean in regard to earth's atmosphere

Which ion is formed when an atom of flourine gains one electron

A nurse counts 66 heartbeats in one minute. What is the period of the hearts oscillation? In minutes

Is the magnet in a compass a permanent magnet or an electromagnet?

Two piano strings are supposed to be vibrating at 220 Hz, but a piano tuner hears three beats every 3.2 s when they are played together. f one is vibrating at 220 Hz, what must be the frequency of the other (is there only one answer)

The difference between two numbers is 15. When twice the smaller number is subtracted from three times the larger number, the difference is 58. What is the larger number?

Vector A makes equal angles with x, y and z axis. value of its components (in terms of magnitude of vector A will be?

What has become an important alternative to Piagetian approaches?

How would life on earth be different if earth's axis were not tilted with respect to its orbit? A. There would be no seasons. B. There would be no day and night. C. All places would have the same climate. D. The seasons would be much shorter.

What will a spring scale read for the weight of a 75.0-kg woman in an elevator that moves upward with constant speed of 5.8 m/s?