# Physics 2014 | Study Mode

Question 11
A
Kinetic energy
B
Mechanical energy
C
Electrical energy
D
Potential energy

Question 12
A
343.32N
B
233.33N
C
333.33N
D
334.33N
##### Explanation
$$\frac{MA}{VR}\times\frac{100}{1}=efficiency$$

$$\frac{L}{E}\frac{1}{VR}\times\frac{100}{1}=75$$

$$\frac{1000}{E}\frac{1}{4}\times\frac{100}{1}=75$$

$$E = \frac{250 \times 100}{75}$$

E = 333.3N

Question 13
A
90%
B
80%
C
85%
D
87%
##### Explanation
VR = 800/200 = 4
$$Efficiency = \frac{MA}{VR} \times \frac{100}{1}$$

$$Efficiency = \frac{L}{E} \times \frac{1}{VR} \times \frac{100}{1}$$

$$Efficiency = \frac{800}{250} \times \frac{1}{4} \times \frac{100}{1}$$

= 78.74%
= 80%

Question 14
A
2.5x104Nm-2
B
1.0x102Nm-2
C
1.0x103Nm-2
D
2.5x103Nm-2
##### Explanation
$$Stress = \frac{Force}{Area}$$

$$Stress = \frac{500}{0.2} = 2500$$

= 2.5 x 103Nm-3

Question 15
A
Fog
B
Haul
C
Mist
D
Dew

Question 16
A
-253oC
B
-293oC
C
68oC
D
36oC
##### Explanation

= (20 - 273)C

= -253C

Question 17
A
a=1, b=1and c=0
B
a=1, b=0 and c=-1
C
a=0, b=1 and c=1
D
a=0, b=1 and c=-1
##### Explanation
if a=0, b=1 and c=-1 then
P0V1T-1 = V/T (Charles Law)

Question 18
A
Heat capacity
B
Internal energy
C
Specific heat capacity
D
Latent heat of fusion
##### Explanation

Question 19
A
Vapour Pressure
B
Solidification Temperature
C
Liquidification Temperature
D
Solidification Pressures

Question 20
A
Boiling point
B
Ice point
C
Saturation point
D
Dew point