The diameter of one arm of a U-tube is 5 mm while the other arm is large. If the U-tube contains some water, and both surface are exposed to atmospheric pressure, determine the difference between the water levels in the two arms.

Can daydreaming ever benefit a person? Explain.

A capillary tube of 1.2 mm diameter is immersed vertically in water exposed to the atmosphere. Determine how high water will rise in the tube. Take the contact angle at the inner wall of the tube to be $6^{\circ}$ and the surface tension to be 1.00 N/m.

Consider a 0.15-mm diameter air bubble in a liquid. Determine the pressure difference between the inside and outside of the air bubble if the surface tension at the air-liquid interface is (a) 0.080 N/m and (b) 0.12 N/m.

The maximum viewing distance on a clear day is related to how high you are above the surface of Earth. This relationship can be approximated by the formula $h = \frac { 3 } { 40 } d ^ { 2 }$ where d is the maximum distance, in kilometres, and h is your height, in metres, above the ground. a) How high do you need to be in order to see a distance of 25 km? b) How would the formula change if you were standing on a 20-m cliff?

Determine the gage pressure inside a soap bubble of diameter (a ) 0.2 cm and (b) 5 cm at $20^\circ C.$

An adult human body consists of about ____ cells. a. 2 billion. b. 50 billion. c. 75 trillion. d. 8 quadrillion. e. 50 million.

An object moving at constant speed v around a circle of radius r has an acceleration a directed toward the center of the circle. The SI unit of acceleration is

$$m/s^2$$

. (a) Use dimensional analysis to find a as a function of v and r. (b) If the speed is increased 10.0%, by what percentage does the radial acceleration increase?

What is the structure of a compound of molecular formula

$$\mathrm { C } _ { 10 } \mathrm { H } _ { 14 } \mathrm { O } _ { 2 }$$

that shows a strong IR absorption at

$$3150 - 2850\ \mathrm { cm } ^ { - 1 }$$

and gives the following

$$^1\text {H NMR }$$

absorptions: 1.4 (triplet, 6 H), 4.0 (quartet, 4 H), and 6.8 (singlet, 4 H) ppm?

A small-diameter tube is inserted into a liquid whose contact angle is $110^{\circ}.$ Will the level of liquid in the tube be higher or lower than the level of the rest of the liquid? Explain.

A small-diameter tube is inserted into a liquid whose contact angle is $110^\circ$. Will the level of liquid in the tube be higher or lower than the level of the rest of the liquid? Explain.

What is the capillary effect? What is its cause? How is it affected by the contact angle?

If the instant communication of today had been available when European nations were exploring the world, how do you think it would have affected events?

Find the best approximation to a solution of the given system of equations.

$$\begin{array} { r r } { x + y - z = } { 2 } \\ { - y + 2 z = } { 6 } \\ { 3 x + 2 y - z = } { 11 } \\ { - x + } { z = 0 } \end{array}$$