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Equilibrium and force distribution problem
A uniform steel beam has a mass of 1178 kg. On it is resting half of an identical beam, as shown in the figure. What is the vertical support at the right end. The left end?
Two childern are sitting on a seesaw. If one child has masss (m1) =22.0 kg sits 2.30 m from the center pivot: (a) How far from the pivot must the second child (m2) = 30.
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By OTA: Michael Douglass, MSc
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General Chemistry - All of the ____________ have a valence shell electron configuration ns1 (where n = principal quantum number).
a. halogens
b. alkali metals
c. alkaline earth metals
d. noble gases
e. chalcogens
_____ hybrid orbitals are used for bonding by Xe in the XeF4 molecule.
a. sp3
b. sp3d2
c. sp2
d. sp3d
e. sp
The central iodine at...
Multiple Choice questions on General Chemistry
- 1) According to the kinetic-molecular theory, molecules of different gases at the same temperature always have the same __________.
a. average density
b. volume
c. pressure
d. molecular mass
e. average kinetic energy
2) The van der Waals equation for real gases recognizes that ____________.
a. the non-zero volumes of gas part...
An equilibrium and weight problem - Two builders carry a sheet of drywall up a ramp. The drywall is very thin and is 3.20m long and 2.20m wide. The ramp makes an angle of 18.0 degrees with the horizontal. The lead builder carries a weight of 139.0 N (31.2 lb). What is the weight carried by the builder at the rear if the drywall is carried by the longside (distance=3.20m between the builders)? Wh...
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