A car hits another and the two bumpers lock together during the collision. Is this an elastic or inelastic collision?
A) elastic
B) inelastic
C) insufficient information (It could be either.)
B
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Denis swims the length of a 40. meter pool in 10. seconds and immediately swims back to the starting position in another 15. seconds. What was his average speed?
What will be an ideal response?
A wheel rotating about a fixed axis with a constant angular acceleration of 2.0 rad/s2 starts from rest at t = 0 . The wheel has a diameter of 20 cm. What is the magnitude of the total linear acceleration of a point on the outer edge of the wheel at t = 0.60 s?
a. 0.25 m/s2 b. 0.50 m/s2 c. 0.14 m/s2 d. 0.34 m/s2 e. 0.20 m/s2
The radioactivity due to carbon-14 measured in a piece of a wood from an ancient site was found to produce 20 counts per minute from a given sample, whereas the same amount of carbon from a piece of living wood produced 160 counts per minute
The half-life of carbon-14, a beta emitter, is 5730 y. The age of the artifact is closest to A) 5700 y. B) 12,000 y. C) 15,000 y. D) 17,000 y. E) 23,000 y.
The age of a star cluster can be determined from the ____________________ of the cluster
Fill in the blank(s) with correct word