Part A 2.5 L of a 4.0 M HNO 3 solution is added to water so that the final volume is 8.0 L . Express your answer using two significant figures.

Part B Water is added to 0.45 L of a 6.0 M KOH solution to make 2.0 L of a diluted KOH solution. Express your answer using two significant figures.

Part C A 80.0 mL sample of 8.0 % (m/v) NaOH is diluted with water so that the final volume is 200.0 mL . Express your answer using two significant figures.

Part D A 5.0 mL sample of 50.0 % (m/v) acetic acid ( HC 2 H 3 O 2 ) solution is added to water to give a final volume of 25 mL . Express your answer using two significant figures.

Q1 (a)0.5 kg of water is contained in a rigid vessel at a temperature of 125oC and a pressure of 232.1 kPa. The specific enthalpy is 1050 kJ•kg-1. Which of the following could also be correct?

(A) v = 0.001065 m3 •kg-1 (B) v = 0.7706 m3 •kg-1 (C) x = 0.24 (D) x = 0.5

(b).0.020 kg of air, initially at 20oC is compressed in a perfectly insulated and sealed cylinder which is fitted with a moveable piston. A mean force of 1000 N was applied to the piston as it moved through a displacement of 100 mm to compress the gas. The final temperature of the gas after compression will be?

(A) 27oC (B) 20oC (C) 30oC (D) 13oC

(c). 0.8857 m3 of H2O is stored in a rigid vessel at 200 kPa, 125oC. Is this?

(A) Sub-cooled liquid ? (B) Saturated liquid ? (C) Saturated vapour ? (D) Superheated vapour ?

1. Skip to 2:51 in the video below. The host uses a small magnet to attract a piece of (totally not a Cheerio for copyright reasons) cereal floating in water. We know that cereal as a whole is not magnetic (it's not going to stick to your refrigerator or collect towards the North side of the cereal bowl), so what could be causing this? Make a guess, and explain the physical reasoning behind it?

https://www.youtube.com/watch?v=1Xp_imnO6WE

2. Begin watching the host's explanation, which is the first in the video below. Pause at 1:08. Upon grinding up the cereal, what is his first explanation for the attraction between cereal and a magnet? What evidence does he offer that this explanation is actually insufficient?

3. Watch the rest of his explanation. What is actually causing the apparent "attraction" between the magnet and the non-magnetic object?

https://www.youtube.com/watch?v=jIMihpDmBpY

Under standard conditions, Consider the following standard reduction potentials,

Ni2+(aq) + 2 e- → Ni(s) E° = -0.26 V I2(s) + 2 e- → 2 I-(aq) E° = +0.54 V Under standard conditions,

a)Ni2+(aq) is a stronger oxidizing agent than I2(s) and I-(aq) is a stronger reducing agent than Ni(s).

b)I2(s) is a stronger oxidizing agent than Ni2+(aq) and Ni(s) is a stronger reducing agent than I-(aq).

c)I-(aq) is a stronger oxidizing agent than Ni(s) and I2(s) is a stronger reducing agent than Ni2+(aq).

d)Ni(s) is a stronger oxidizing agent than I-(aq) and Ni2+(aq) is a stronger reducing agent than I2(s).

One is able to use Gin (G) and Vermouth (V) to produce martini. A regular martini is produced with 2 portions Gin for 1 portion Vermouth. A dry martini is produced with 5 portions Gin and 1 portion Vermouth. The prices of a regular martini (PM) and a dry martini (PD) are fixed. You have a given supply to both Gin (G) and Vermouth (V). what are the prices of Gin and Vermouth, i.e. WG and WV? You can think of these prices as analogs of the wages for labor and rental rate for capital. Hint WG and WV should be expressed as equations written in terms of PM and PD.

a) Using the previous part, answer the following question: Suppose that the price of dry gin PD increases. Does this increase change wg and wv? If you did not solve the previous part of the problem, explain intuitively what should happen to wg and w.

1.The domain of r(t)=〈sin(t),cos(t),ln(t+1)〉 is

Select one:

a. (−∞,−1]
b. (π,2π)

c. (−∞,−2]
d. (−π,2π)
e. ℝ

f. (−1,∞)

2. The limt→πr(t) where r(t)=〈t2,et,cos(t)〉 is

Select one:

a. 〈π2,eπ,−1〉

b. undefined

c. 〈π2,eπ,1〉
d. π2+eπ
e. 〈π2,eπ,0〉

3.Let v(t)=〈2t,4t,t2〉. Then the length of v′(t) is

Select one:

a. 20‾‾‾√+2t

b. 20+4t2

c. 20+2t‾‾‾‾‾‾‾√

d. 20+4t2‾‾‾‾‾‾‾‾√

e. 6+2t‾‾‾‾‾‾√
f. 1

4. The curvature of a circle centred at the origin with radius 1/3 is

Select one:

a. 1

b. 1/3

c. undefined

d. 3

e. 10

52. Consider the following five statements: i. Swaps may be used to achieve a lower cost of funds for a company. ii. In an interest rate swap, the two parties swap the principal amount plus the ongoing associated interest obligations. iii. An intermediated swap is said to be ‘matched' when a bank enters into swaps with both firms involved in an interest rate swap iv. A ‘plain vanilla' swap is the fixed AUD to floating AUD swap. v. If an intermediary is involved in a swap between two parties, the intermediary will also provide the initial loan to both parties. Which of the following are correct? A. i, ii, iii and iv are true B. ii, iii, iv and v are true C. ii, and iv are true D. i and iii are true

why choose d can help explain why other three are incorrect?????

A Mechanical design company produces an innovative design Component Z100 design of producing one(1) unit of component Z100 is provided in the bill of materials BOM which requires mix shown in Table Q3-1. The current monthly production of Component Z100 is consumption shown in Table Q3-2. Determine the following;

(i) Material usage variance;

(ii) Material price variance;

(iii) Total material cost variance;

(iv) Discuss at least two(2) importance of variance analysis in a manufacturing company

Table Q3-1

Table Q3-2

Choose true or false for each statement regarding the resistance of a wire.
true false  While maintaining a constant voltage V, the current I increases when the length L of a wire increases.
true false  The resistance is proportional to the cross-sectional area A of the wire.
true false  While maintaining a constant voltage V, the current I decreases when the resistivity ρ of a wire decreases.

Choose true or false for each statement regarding resistors in a circuit.
true false  If you connect two different resistors in parallel in a circuit, then the voltage across each of them is different.
true false  If you connect two different resistors in series in a circuit, then the current that flows through each of them is different.
true false  Three identical resistors in parallel have one third the resistance of each individual one.