Which is the SI base unit for mass?

When the wind kicks up dust and sand, the dust grains are charged. The small grains tend to get a negative charge, and the large grains a positive charge. The small grains are lifted higher by the wind.?

What is the difference between: first moment of area and second moment of area?

A rock from Mars experiences a 263% increase in its weight once it arrives on Earth. What accounts for this increase in weight?

How do the independent and dependent variables in an experiment compare? A. They are the exact same as one another. B. They have no effect on one another. C. The dependent variable controls the independent variable. D.

Your friend drops your house keys down to you from their second floor window. If you catch them 2.4 m from where your friend dropped them, what is the velocity of the keys when you catch them? a. -6.9 m/s c. -7.2 m/s b. -6.5 m/s d. -7.4 m/s

Which of the following statements concerning Howard Gardner's multiple intelligences is not correct? A. Gardner is not interested in assessing levels of intelligence. B. Gardner has based his theory on research in various areas of psychology. C.

The force of attraction between two oppositely charged pith balls is 5.3 * 10-6 newtons. If the charge on the two objects is 6.7 * 10-9 coulombs, what is the distance between the two charges? (k = 9.0 * 109 newton·meter2/coulombs2)

To describe velocity you need to know?

Mohammed made a chart to list examples and nonexamples of projectile motion. Which best completes the chart? a - a football thrown in the airb - a kite flying on a stringc - a golf ball rolling off a table d - water spraying from a fountain

Halley's Comet appears around the sun about once every 76 years. It passes through the part of its orbit nearest the sun in just a few months but then moves out to great distances and takes more than half a century for the rest of its orbit.