A 100-kg person sits on a 5-kg bicycle. The weight is borne equally by the two wheels of the bicycle. The tires are inflated to a gauge pressure of 8.0 x 105 Pa and are 2.0 cm wide. What length of each tire is in contact with the ground?
A) 1.6 cm
B) 1.8 cm
C) 3.2 cm
D) 2.4 cm
E) 6.4 cm
C
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A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the vertical height of the stairs is 20 meters, the person's power output is 1,200 W
a. True b. False Indicate whether the statement is true or false
The free-stream flow outside a boundary layer is:
(A) Either laminar or turbulent, depending on the Reynolds number (B) A smooth flow free of disturbances (C) An irrotational flow (D) Neither laminar nor turbulent
If the electric field and magnetic field of an EM wave are given by E = Eo sin(kx - ?t) and B = Bo sin(kx - ?t), and if the value of Eo is 5.1 x 10-5 V/m, what is the value of Bo?
A) 1.7 × 1014 T B) 1.7 × 103 T C) 1.7 × 10-14 T D) 1.7 × 104 T E) 1.7 × 10-13 T
The vibrations of a longitudinal wave move
A) along the direction of wave travel. B) at right angles to the direction of wave travel. C) that changes with speed.