1. c) tan angle. angle = 36.9 degrees
d ii) T = 420 N . Quite a few take moments without multiplying by distance. T sin @ is correct component.
e i) Sum of forces equal to zero . Not just upward and downward forces are equal.
ii) Rx = 340 N to the left
iii) Ry= 240 N upwards
2. a)thermometric property are different. ( not just sensitivity of something different)
b) The two fixed points are absolute zero (0 K) and triple point (273.16 K)
c) 1. C scale depends on thermometric property but not K scale
2. C scale is emperical scale and K scale is absolute scale(theoretical )
3. C scale uses 2 fixed points ice and steam points, whereas K scale uses absolute zero and triple point.
Any 2 of the 3 above.
d) T = 72.9 degrees C . If you did not convert T into kelvin your answer is wrong.3. b) Q = 53000 J
ii) Q = 21 000J
iii) m = 0.16 kg (common error is failing to add mc@ to mL)
iv) @ = 28 degrees C ( common error is failing to include the water formed from melted ice)
