State Coulomb's law for magnetic poles
The force of attraction or repulsion between magnetic poles is directly proportional to
the product of their pole strength and inversely proportional to the distance between
the poles.
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What is the Doppler effect, and how is it produced? Cite two examples
What will be an ideal response?
When will the full moon be highest above the southern horizon for an observer in the Northern Hemisphere?
a. at midnight near the summer solstice b. at midnight near the vernal equinox c. at midnight near the winter solstice d. at midnight near the vernal equinox e. The angle between the southern horizon and the full moon at midnight does not change with the seasons.
The Earth never passed through the cratering stage in planetary development
Indicate whether the statement is true or false
A 150-N crate is being pulled up a perfectly smooth ramp that slopes upward at 15° by a pull that is directed at 30° above the surface of the ramp
What is the magnitude of the pull required to make the crate move up the ramp at a constant velocity of 1.75 m/s?