Density
What will be an ideal response?
a property of all matter, minerals included
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A source emits sound at a fixed constant frequency f.If the source moves away from you faster than the speed of sound in air, you do not hear any frequency but instead a ‘sonic boom.'
a. True b. False Indicate whether the statement is true or false
When considering human metabolism in terms of the 1st law of thermodynamics, which of the following represents the metabolic rate?
a. ?U / ?t b. ?Q / ?t c. W / ?t d. ?W / ?t
An airplane flies in a horizontal circle of radius 500 m at a speed of 150 m/s. If the plane were to fly in the same 1000 m circle at a speed of 300 m/s, by what factor would its centripetal acceleration change?
a. 0.25 b. 0.50 c. 1.00 d. 2.00 e. 4.00
Your instructor rides on a merry-go-round turning at a constant rate. In which direction does the net force on your instructor point?
a. down b. tangent to the circular path c. away from the center d. toward the center