Velocity: A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?

A. 85 km/h
B. 88 km/h
C. 90 km/h
D. 92 km/h


Answer: B

Physics & Space Science

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Two converging lenses, the first with focal length 10.0 cm and the second with focal length 20.0 cm, are separated by 40.0 cm. An object, 3.00 cm in height, is placed 30.0 cm in front of the first lens. Where is the final image formed?

A. 11.1 cm after the second lens B. 100 cm after the second lens C. 45.0 cm after the second lens D. 5.00 cm after the second lens E. 5.00 cm before the second lens

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If the stress amplitude in a fatigue test is below the endurance limit, the number of cycles to failure approaches _________.

Fill in the blank(s) with the appropriate word(s).

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Fill in the blank(s) with correct word

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