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A molecule belongs to the C3v  point group. Using the C3v  character table, select all statements that is/are correct.

Deep foundations are primarily used to:

Figure below shows the results of seismic refraction test at a site with the top soft soil layer underlain by the bedrock. In order to decide the suitability of this site for deep foundation, depth to the bedrock must be determined. From the results of the seismic refraction test, calculate the depth to the bedrock, zc, and select the correct answer from the choices provided: Seismic Refraction.jpg

The compactive effort is expressed in units of [BLANK-1] per unit volume.

Increasing compactive effort generally increases maximum dry density and decreases optimum moisture content.

Disturbed soil samples are suitable for shear strength tests.

Match foundation type with description:

Davisson’s method was originally recommended for [BLANK-1] piles.

The water content corresponding to maximum dry density on the moisture-density graph is known as [BLANK-1].

Sinusitis and antibiotics. Researchers studying the effect of antibiotic treatment for acute sinusitis compared to symptomatic treatments randomly assigned 166 adults diagnosed with acute sinusitis to one of two groups: treatment or control. Study participants received either a 10-day course of amoxicillin (an antibiotic) or a placebo similar in appearance and taste. The placebo consisted of symptomatic treatments such as acetaminophen, nasal decongestants, etc. At the end of the 10-day period, patients were asked if they experienced improvement in symptoms. The distribution of responses is summarized below.11Links to an external site. (Garbutt et al. 2012Links to an external site.) Improvement Group No Yes Control 16 65 Treatment 19 66 What is the explanatory variable in this study?