Engineering Answers

1. Determine the number of atoms in 1.75 mol Al

2. Calculate the number of formula units in 25.0 mol NaNO3

3. Given 6.25 mol H O2 determine the number of molecules.

DIRECTIONS: A. How many atoms are in each of the following samples? .

11.3 .44.2 a g Pb

b g Mg

B. Calculate the mass in grams of each of the following samples. 18 21 4 .

1.50x10 .8.35x10 a atoms Ne

b molecules CH 1. What is the percent composition of the following compounds?

0 8 12 22 11 2 4 3 . ( ) . ( ) . min ( ( )

a Naphtalene C H

b Sucrose C H O

c.Alu um sulfate Al SO

1. This 2 kg hammer is 0.4 m up. What is it's PE?

2. What is the KE of a 1500 kg car going at suburban speed of 14m/s (about 50 km/h or 30 mph)?

3. The same car is now going at highway speed of 28m/s (About 100 km/h or 60 mph)?

4. A 1 kg meteorite strikes the Moon at 11km/s. How much KE is that?

Give a simple reduction from 3D MATCHING to SAT, and another from RUDRATA CYCLE to SAT. (Hint: In the latter case you may use variables xij whose intuitive meaning is “vertex i is the jth vertex of the Rudrata cycle”; you then need to write clauses that express the constraints of the problem.)

If an amplifier working with ±5 V DC power supplies requires a minimum output voltage of 2.3 V across a load resistance of 185 ohms, calculate the minimum average current to be drawn from each power supply, if the efficiency of the amplifier is 50 %.

The crank and connecting rod of a reciprocating engine are 150 mm and 600 mm respectively. The crank makes an angle of 60° with the inner dead center and revolves at a uniform speed of 300 r.p.m. Find, by Klein’s construction,

1. Velocity and acceleration of the piston,

2. Velocity and acceleration of the mid-point D of the connecting rod, and

3. Angular velocity and angular acceleration of the connecting rod.

How series dimensioning can be done in engineering drawing? Mention any two methods and describe with the help  of examples.

a 2,4 high container in a chemical plant stores three separate chemicals ,one on top of each other .These chemicals have densities of 1450 kg/m^3,550kg/m^3 respectively. Each chemical has a height of 0,8 m. Determine the total force on the 1,5 m side of the container and where it acts

the face of a dam is vertical to a depth of 5 m below the water surface and then slopes at 30 degrees to the vertical. If the depth of the water is 9 m,completely specify the resultant force per metre run acting on the whole face. Use equilibrium of vector to find the final answer

Select the rating of the fuse, keeping in view the standards of fuse rating manufactured by manufacturers, to protect a resistive circuit having 18 A full load current.

Multi Line Text.

(1 Point)

If you are given two cartridge fuses of unequal lengths, discover, by stating reason (s), which one might be a high voltage fuse.

Multi Line Text.

(2 Points)