A marble rolls off the edge of a table top with a speed of 2.0 m/s. What is the magnitude of its velocity 0.10 s later?
What will be an ideal response?
2.2 m/s
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There are no _______________ rocks on the surface of the Moon
Fill in the blank(s) with correct word
A car enters a level, unbanked semi-circular hairpin turn of 300 m radius at a speed of 40 m/s. The coefficient of friction between the tires and the road is m = 0.25 . If the car maintains a constant speed of 40 m/s, it will
a. attempt to dig into the road surface. b. tend to veer toward the center of the semicircle. c. arrive safely at the end of the semicircle. d. tend to veer toward the outside of the circle. e. veer toward the center for the first quarter-circle, then veer toward the outside for the second quarter-circle.
How much compressional stress builds up in a thick aluminum bar held between 2 immovable walls if the temperature increases by 20. C°? (? = 24. × 10-6 C-1, Y = 7 × 1010 N/m2)
A) 34. × 105 N/m2 B) 34. × 107 N/m2 C) 34. × 106 N/m2 D) 34. × 104 N/m2 E) 34. × 108 N/m2
Air can be compressed easily because there is a great deal of empty space between air molecules
a. True b. False Indicate whether the statement is true or false