What is a perm?
What will be an ideal response?
A perm is a specific unit or term to describe the ability of a substance to allow
permeation. The units off the perm are grains/in.Hg?hr?ft^2.
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Two people are balanced on a seesaw. If one person leans inward toward the center of the seesaw, that person's end of the seesaw tends to
A) rise. B) fall. C) stay at the same level. D) need more information
Two long conducting cylindrical shells are coaxial and have radii of 20 mm and 80 mm. The electric potential of the inner conductor, with respect to the outer conductor, is +600 V
An electron is released from rest at the surface of the outer conductor. What is the speed of the electron as it reaches the inner conductor? (e = 1.60 × 10-19 C, mel = 9.11 × 10-31 kg, k = 1/4??0 = 8.99 × 109 N • m2/C2 ) A) 1.1 × 107 m/s B) 1.3 × 107 m/s C) 1.5 × 107 m/s D) 1.7 × 107 m/s E) 1.9 × 107 m/s
A 66-kg woman runs up a flight of stairs having a rise of 4.0 m in a time of 4.2 s. What average power did she supply?
a. 380 W c. 620 W b. 560 W d. 670 W
The internal energy of n moles of an ideal gas depends on
a. one state variable T. b. two state variables T and V. c. two state variables T and P. d. three state variables T, P and V. e. four variables R, T, P and V.