A river has a steady speed of 0.30 m/s. A student swims downstream a distance of 1.2 km and returns to the starting point. If the student swims with respect to the water at a constant speed and the downstream portion of the swim requires 20 minutes, how much time is required for the entire swim?
a. 50 minutes
b. 80 minutes
c. 90 minutes
d. 70 minutes
e. 60 minutes
d
Physics & Space Science
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For the 7075-T6 alloy in Figure 11.23, the probability of surviving 106 cycles with a stress amplitude of 210 MPa is equal to
(a) 99 % (b) 90 % (c) 50 % (d) 10 %
Physics & Space Science
The mass of 1000 cm3 of water is a kilogram
a. true b. false
Physics & Space Science
The formula for nickel(II) nitrate would be ______________
Fill in the blank(s) with correct word
Physics & Space Science
When red light illuminates a grating with 7000. lines per centimeter, its second maximum is at 62.4°. What is the wavelength of the light?
What will be an ideal response?
Physics & Space Science