10: In the picture below, the top of the manometer tube is open to the atmosphere. Liquid mercury has a density of 13,500 kg/m³. The height difference between the two mercury levels is 0.25 m. A) What is the gauge pressure of the gas in the bulb in Pa and is it over or under the regular atmospheric pressure? B) What is the absolute pressure of the gas in the bulb in atmospheres? C) If you poked a hole in the tube at level of the lower dotted line of h just above the arrow marking "Liquid Mercury", how fast would the mercury spray out? Gas Liquid Mercury

What is specific gravity? How is it related to density?

Imagine an underwater cavern system as depicted below. (Water in blue, air pocket in white)The dashed lines represent regular increments in depth below the water surface. Rank the points A – H in terms of increasing water pressure.

Imagine two blocks as shown in Figure 10A-1. The two blocks, with the same size bases, are resting on the horizontal surface of a table. Each block pushes down on the underlying surface with a force (weight) that is ______ the downward force exerted by the other block.a.different fromb.equal toc.twice By definition, pressure is the amount of force acting on an area of surface. Pressure is calculated by dividing the force exerted on a surface by the area over which the force is applied. The blocks weigh the same and their bases have the same area, so the two blocks exert ______ pressure on the underlying surface.a.half theb.the samec.twice the

Q3. Péclet number - We've seen the Péclet number Pé vl as a useful metric to D determine if stirring (Pé > 1) is more efficient than diffusion (Pé < 1) for mixing solutions. "Stirring" here can designate any process which applies a force on the molecules, resulting in a velocity v. a) Show that the Péclet number, like the Reynolds number, is unitless. Let's think about why scale (f) matters for mixing. 2-DNA, a DNA polymer containing 48,502 base pairs, has a diffusion coefficient of D field of 1 V/m, we can expect 1-DNA to reach a terminal velocity of 30 nm/s. 6.4 × 10-13m²s¬1. Under an electric b) Find the Péclet number for a system of dimension of e = 10 cm. This corresponds to the scale of most benchtop instruments used to manipulate or separate biomolecules. c) Find the Péclet number for a system of dimension of e to the scale over which most cellular processes occur. d) Find the scale l for which diffusion is just as efficient as electric field for displacing = 10 µm. This…

help please. Water in a hose with an area of 153 mm2 moves at 4 m/s, but then you cover part of the opening of the hose with your finger, and the water shoots out faster at 16 m/s . Find the area of the opening between your finger and the end of the hose in mm2. Note: you can leave the areas in mm2 since they'll cancel out.