The type of stress that pulls on and thins an area of Earth's crust is called (a) torsion (b) tension (c) shearing (d) diverging

Using the method of joints, determine the force in each member of the truss shown. Indicate whether the member is in compression or tension.

Name a beta adrenergic drug used for overactive bladder. Describe its mechanism of action at a receptor level and list 1 prominent side effect of the selected drug.

a. What are the three main types of stress in rock? b. How does tension change the shape of Earth's crust? c. Compare the way that compression affects the crust to the way that tension affects the crust.

Consider a wave on a string with constant tension. If the frequency of the wave is doubled, by what multiplicative factor does the speed change?

In a strongly acidic solution, cyclohexa-1,4-diene tautomerizes to cyclohexa-1,3-diene. Propose a mechanism for this rearrangement, and explain why it is energetically favorable.

The acid-catalyzed aldol condensation of acetone also produces some 2,6 -dimethylhepta- 2,5 -dien- 4 -one. Give a mechanism that explains the formation of this product.

If the angles between the horizontal and the ropes in the above Problem are changed to $20.0^{\circ}$ and $30.0^{\circ}$, What is the tension in each rope.

For the shearing mechanism in the configuration shown, use the instantaneous center method to graphically determine the linear velocity of the blade as the crank rotates counterclockwise at $65 \mathrm{rpm}$.

Compare a polar water molecule with a less-polar molecule, such as formaldehyde, $\mathrm{CH}_2 \mathrm{O}$. Both are liquids at room temperature and $1 \mathrm{~atm}$ pressure.

_________a. Which liquid should have the higher boiling point?

_________b. Which liquid is more volatile?

_________c. Which liquid has a higher surface tension?

_________d. In which liquid is $\mathrm{NaCl}$, an ionic crystal, likely to be more soluble?

Propose a mechanism for the reaction of 1-chloroanthraquinone with methoxide ion to give the substitution product 1-methoxyanthraquinone. Use curved arrows to show the electron flow in each step.

What happens to the wavelength of a wave on a string when the frequency is doubled? Assume that the tension in the string remains the same.

Heating 1,1,1-triphenylmethanol with ethanol containing a trace of a strong acid causes the formation of 1-ethoxy-1,1,1triphenylmethane.

Write a plausible mechanism that accounts for the formation of this product.

Underline the gerund in each of the given sentences.

After exams are over, dancing helps to get rid of tension.