A small quantity of n-octane is placed in a wide test tube at 20 degrees C...

A small quantity of n-octane is placed in a wide test tube at 20 degrees C and two capillaries are inserted vertically and immersed to the same depth. The radii of the capillaries are unknown but are of the order of 0.1 and 0.01 mm. Air is blown through each capillary in turn and the pressure necessary to just produce a slow stream of bubbles is recorded on a manometer filled with water. Show that the surface tension of each test liquid may be expressed as K(h1 – h2) where h1 and h2 are the two manometer readings and K is a constant for the apparatus.

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samet mamat answered 2 years ago

a) A(n) 85-g ice cube at 0°C is placed in 920 g of water at 20°C....

a) A(n) 85-g ice cube at 0°C is placed in 920 g of water at 20°C. What is the final temperature of the mixture? b) A 103-g cube of ice at 0°C is dropped into 1.0 kg of water that was originally at 87°C. What is the final temperature of the water after the ice has melted? c) An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 432-g sample of silver at...

Solid mercury with a mass of .800kg and a temp of -40.0 degrees C is placed...

Solid mercury with a mass of .800kg and a temp of -40.0 degrees C is placed on top of a block of copper with a mass of 1.00 kg and a temp of -10.0 degrees C. Determine the temperature and phase of each substance when equilibrium is reached, assuming the system is thermally isolated. Also, assume the specific heat of solid and liquid mercury are the same.

Water flows through a three-soil system placed in a 10 cm-wide square tube. Soil layers are...

Water flows through a three-soil system placed in a 10 cm-wide square tube. Soil layers are described as follows: Soil Thickness (cm) K (cm/sec) A 2 0.1 B 1 0.002 C 7 0.0006 Calculated the discharge (q) through each soil and through the system when water flows: 1- Parallel to layering (take head difference = 80 cm and length of all layers = 200 cm). 2- Perpendicular to layering (take head difference = 9 cm) - In case 2, what...

The degrees of freedom for the F test in a one-way ANOVA, with n observations and...

The degrees of freedom for the F test in a one-way ANOVA, with n observations and k independent samples, are: Select one: a. (n - 1) and (n - k) b. (k - n) and (k - 1) c. (k - n) and (n - 1) d. (k - 1) and (n - k)

A brass plug is to be placed in a ring made of iron. At 20 ∘C∘C,...

A brass plug is to be placed in a ring made of iron. At 20 ∘C∘C, the diameter of the plug is 8.754 cmcm and that of the inside of the ring is 8.739 cmcm . 1.They must both be brought to what common temperature in order to fit? Express your answer using two significant figures. 2. What if the plug were iron and the ring brass? Express your answer using two significant figures.

company manufactures a series of 20-in. flat-tube LCD televisions. The quantity x of these sets demanded...

company manufactures a series of 20-in. flat-tube LCD televisions. The quantity x of these sets demanded each week is related to the wholesale unit price p by the following equation. p = −0.007x + 190 The weekly total cost (in dollars) incurred by Pulsar for producing x sets is represented by the following equation. Find the following functions (in dollars) and compute the following values. C(x) = 0.000004x3 − 0.02x2 + 150x + 65,000 (a) Find the revenue function R....

A 70.0 g ice cube at 0.0 degrees C is placed in a lake whose temperature...

A 70.0 g ice cube at 0.0 degrees C is placed in a lake whose temperature is 18.0 degrees C. Calculate the change in entropy (in joules/Kelvin) of the system as the ice cube comes to thermal equilibrium with the lake. (c for water = 4186 J/kg-K)

Which of the following terms refers to a small tube surgically placed in the eardrum to assist in draining trapped fluid?

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Calculate the final temperature, in degrees Celsius, ∘C, for each of the following with n and...

Calculate the final temperature, in degrees Celsius, ∘C, for each of the following with n and V constant. A sample of air at 35 ∘C and 780 mmHg is cooled to give a pressure of 640 mmHg . Express your answer to two significant figures and include the appropriate units.

A quantity of HI was sealed in a tube, heated to 425°C, and held at this temperature until equilibrium was reached.

1. A quantity of HI was sealed in a tube, heated to 425°C, and held at this temperature until equilibrium was reached. The concentration of HI in the tube at equilibrium was found to be 0.0706 moles/liter. Calculate the equilibrium concentration of H2 (and I2). (Hint: H2 and I2 are equal). For the reaction: H2(g) + I2(g) ßà 2 HI(g) Kc = 54.6 at 425°C. ans. 9.55 × 10-3M 2. Consider the reaction: 2 NO2(g) ßà N2O4(g). A...

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