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memorize.aimemorize.ai (lvl 286)
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9 cards
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Section 1

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Hydrogen and Nitrogen gas are on 1 side of a container, separating an open space by a divider. A small hole is poked so gas can leak through. What is the H2:N2 ratio on the right side? A. 14 B. sqrt 14 C. 1/sqrt 14 D. 1/14

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Last updated

6 years ago

Date created

Mar 1, 2020

Cards (9)

Section 1

(9 cards)

Hydrogen and Nitrogen gas are on 1 side of a container, separating an open space by a divider. A small hole is poked so gas can leak through. What is the H2:N2 ratio on the right side? A. 14 B. sqrt 14 C. 1/sqrt 14 D. 1/14

Front

Setting Kinetic energies equal 1/2MaVa^2 = 1/2 MbVb^2 you get sqrt(ma/mb) = vb/va - velocity is proportional to amount on the other side If we call H2 Va and N2 Vb We get Va/Vb = sqrt(mb/ma) which is VH2/VN2 = sqrt(N2 MW/H2 MW) - note that in this equation A and B is flipped under the square root for molecular weight. = sqrt(28/2) = sqrt(14) which is the answer for ratio of H2:N2 ratio.

Back

Which equation is missing delta x?

Front

VFx = Vox + ax*t

Back

A 50 kg man starts from rest and slides down a 10m long ramp, positioned at 30 degrees. Assume the ramp is fricitonless, how long did it take to slide down this ramp? A. 1.5s B. 2s C. 4s D. 1s

Front

we know from the triangle that the distance is 10m and the height is 5m, then once we get Vf = 10 , we write out the variables we know, Vf = 10, Vi = 0, d = 10, t = ? , we don't know acceleration so we use the equation d = Vo+Vf/2 * t 10 = [(10 + 0 ) / (2)] * t t = 10/5 = 2 seconds

Back

Which equation is missing t?

Front

VFx^2 = Vox ^2 + 2ax delta x

Back

Which equation is missing Vf?

Front

delta x = Voxt + 1/2 axt^2

Back

Which equation is missing Vo ?

Front

delta x = VFxt -1/2 axt^2

Back

Which equation is missing a?

Front

delta x = (Vox + VFx)/(2) * t

Back

What is the list of 5 kinematics equations?

Front

VFx = Vox + ax*t (missing delta x) delta x = (Vox + VFx)/(2) * t (missing a) VFx^2 = Vox ^2 + 2ax delta x (missing t) delta x = Voxt + 1/2 axt^2 (missing VF) delta x = Voxt -1/2 axt^2 (missing Vo) for y direction switch out the x's with y's

Back

meters to meter? meter to cm? meter to mm? meter to micro meter? meter to nanometer? meter to picometer? meter to km?

Front

10^0 m = 1m 10^-2m = 1 cm 10^-3m = 1mm 10^-6m = 1 um 10^-9m = 1nm 10^-12m = 1 pm 10^3m = 1 km

Back