Describe some ways in which a meteorite can be distinguished from a terrestrial rock
What will be an ideal response?
Meteorites are usually covered with a dark, pitted crust from their fiery passage through the atmosphere. Some contain enough metal to attract a magnet hanging on a string. The isotopic ratios in meteorites differ from terrestrial rocks and they may also have a higher abundance of rare elements such as iridium than terrestrial rocks.
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A colloid is a ______________ mixture.
Fill in the blank(s) with the appropriate word(s).
A very thin uniform rod, 2.40 m long and of weight 135 N, has a frictionless hinge at its lower end
It starts out vertically from rest and falls, pivoting about the hinge. Just as it has rotated through an angle of 55.0°, what is the downward acceleration of the end farthest from the hinge? A) 5.02 m/s2 B) 8.03 m/s2 C) 9.80 m/s2 D) 12.0 m/s2 E) 19.6 m/s2
Sound waves can interfere with one another so that no sound is produced.
Indicate whether the statement is true or false
The critical angle is least in
A) glass. B) water. C) diamond. D) vacuum.