How do sound and light waves differ?
What will be an ideal response?
Sound waves travel much slower, and need a physical medium, such as air, to be transmitted. Light travels best in the vacuum of space.
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An object is being acted upon by three forces and moves with a constant velocity. One force is 60 N along the x-axis, the second is 75 N along a direction making a counterclockwise angle of 150° with the x-axis
What is the direction of the third force, measured counterclockwise from the x-axis? A) 128° B) 182° C) 226° D) 255° E) 262°
The sun rotates more quickly at the equator than at the poles
Indicate whether the statement is true or false
The substances that are formed by a chemical reaction are called the
a. products. b. reactants. c. chemicals. d. precipitates.
A dust particle has a rest energy (mass) of 1.0 ?g. In joules, this rest energy is closer to:
A. 1017 J B. 1011 J C. 108 J D. 10-3 J E. 10-23 J F. Other (specify)