ANSWERS
|
1) 4 |
2) 3 |
3) none |
4) 2 |
|
5) 4 |
6) 2 |
7) 2 |
8) 1 |
|
9) 1 |
10) 3 |
11) 3 |
12) 1 |
|
13) 4 |
14) 2 |
15) 2 |
16) 3 |
|
17) 1 |
18) 3 |
19) 1 |
20) 3 |
|
21) 1 |
22) 3 |
23) 1 |
24) 1 |
|
25) 1 |
26) 1 |
27) 2 |
28) 3 |
|
29) 4 |
30) 4 |
31) 4 |
32) 3 |
|
33) 4 |
34) 2 |
35) 4 |
1.
Momentum = mass x velocity
Momentum = 3.513 x 5.00 = 17.565 kg m sec-1
Momentum in three significant digit = 17.6 kg m sec-1
2.
Moment of Inertia of a body is the inertia of a rotating body with respect to the axis of rotation.
Moment of Inertia of the square plate at the center of the axis (vertical axis) = ma2/6
Moment Inertia at the axis passing through corner = Icenter + m d2 = ma2 + m(a/√2)2 = 2/3 ma2
3.
Speed of the sound in gas
V = √(γRT/m)
R = gas constant(8.314 J/mol K)
T = the absolute temperature
M = the molecular weight of the gas (kg/mol)
g = adiabatic constant = cp/cv
gO2 = 7/5
gHe = 5/3
MO2 = 32
MHe = 4
460 = √(7RT/5x32) ...... (i)
VHe = √(5RT/3x4) ...... (ii)
By solving (i) and (ii) VHe = 1419 m sec-1