During the Pleistocene ice age
A) there was one large episode of glacial advance.
B) there were several episodes of glacial advance and retreat.
C) Earth's entire surface was covered with ice.
D) Earth's oceans were completely frozen.
Answer: B
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a. True b. False Indicate whether the statement is true or false
A guitar string 0.650 m long has a tension of 61.0 N and a mass per unit length of 3.00 g/m. (a) What is the speed of waves on the string when it is plucked? (b) What is the string's fundamental frequency of vibration when plucked?
What will be an ideal response?
When Jean standing on slippery ice catches her leaping dog Daisy, the momentum of both Jean and Daisy after the catch is
A) greater than their combined momentum before the catch. B) equal to their combined momentum before the catch. C) somewhat less than their combined momentum before the catch.
Wendy walks 10 m in one direction at 2 m/s, then runs 6 m in the same direction at 6 m/s. Next, she stops for 4 seconds, and finally walks in the opposite direction at 4 m/s for 6 seconds
Wendy's average speed is closest to:
1.½ m/s 2.1 m/s 3.1½ m/s 4.2 m/s 5.2½ m/s 6.3 m/s 7.3½ m/s 8.4 m/s 9.the negative of one of the choices above 10.impossible to determine