A hunter wishes to cross a river that is 1.5 km wide and flows with a velocity of 5.0 km/h parallel to its banks. The hunter uses a small powerboat that moves at a maximum speed of 12 km/h with respect to the water. What is the minimum time for crossing?
0.14 h
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Increasing the speed of waves on a guitar string increases the _________ of the sound it produces
Fill in the blank(s) with correct word
The purpose of the Michelson-Morley experiment was to
A. detect possible motion of the sun relative to the ether. B. detect possible motion of the Earth relative to the ether. C. detect possible motion of the Earth relative to the sun. D. determine the velocity of light.
The following steady-state stage II creep rates were recorded for a nickelbase superalloy:
(a) Evaluate all of the terms in the stage II creep-rate equation. Use the strain rate at 811 K and 60 MPa to evaluate the term A.
(b) Determine the stage II creep rate for a stress of 40 MPa and a temperature of 800 K.
Two instruments produce a beat frequency of 5 Hz. If one has a frequency of 264 Hz, what could be the frequency of the other instrument?
a. 269 Hz b. 254 Hz c. 264 Hz d. 5 Hz e. 274 Hz