Molecular Physics | Thermodynamics Answers

i just want to ask how can i solve the q dissolution and the delta H dissolution. i hope you could answer my question. thank you

An iron ring is to fit snugly on a cylindrical iron rod. At 20°C, the diameter of the rod is 6.445 cm and the inside diameter of the ring is 6.420 cm. To slip over the rod, the ring must be slightly larger than than the diameter by about 0.008 cm. To what temperature must the ring be brought if it's hole is to be large enough so it will slip over the rod?

1. Consider a random sample of approximately thirty (30) sixteen year old teenagers. For each one of these teenagers, record the weight and height. Use the data obtained to:

(i) Compile a log sheet
(ii) use the data ( either weight or height) from the log sheet to construct a frequency distribution table.
(iii) Use graphical descriptive techniques ( pie chart, bar chart, histogram......) to display the data.
(iv) Discuss ( describe) your graphs.

(i) Name four viruses that can cause diseases that are often fatal

(ii) Explain the relationship between shingles and chickenpox

Discuss Seebeck and peltier effect

What effect will be responsible for heating or refrigeration ?

1. The mass of the palm fruit is 125g. Calculate the weight of the palm fruit.

2. The palm fruit moves at a constant speed just before it hits the ground. State the upward force and the downward force acting on it.

1. (i) The palm fruit has a velocity of 11m/s vertically downwards. When it hits the ground it comes to rest in 0.2 s. Calculate the average deceleration on the fruit.

(ii) Calculate the kinetic energy of the palm fruit just before it hits the ground.

Two small discs of masses m1 and m2 interconnected by a weightless spring rest on a smooth horizontal plane. The discs are set in motion with initial velocities v1 and v2 whose directions are mutually perpendicular and lie in a horizontal plane. Find the total energy E of this system in the frame of the centre of inertia