I think that the price is going to depend on a year it was manufactured, and whether you are trying to trade it in or sell to a reseller (like a piano store), or a private buyer. I would search eBay for similar listings. Currently, one is selling for about 6000$ on eBay, made in late 90s.
Quite simply, a C172 has four seats and a 152 only has two.
It varies. In some parts of the county, you can rent a C172 wet for $80/hr. A new model C172 or Piper may run around $150/hr wet.
My Cessna 172 (C172) holds 200 liters. 100 in the left wing and 100 in the right wing.
This question often comes up from the C172 models which say not to slip with full flaps. The disturbed air from the flap system can impact the horizontal stabilizer and cause an uncommanded pitch change. Note that not all models of the C172 have this prohibition, even with 40 degrees of flap travel the R172K does not have the restriction.
Va is a function of the weight, not necessarily of stall speed. At least with single engine land aircraft that I'm familiar with. In the C172 that I fly, Va is interpolated by using these for numbers 1900LBS=90 kts and 2550LBS=105 kts. The heavier the aircraft, the higher angle of attack, and the closer it is to stall speed. With that being said you can fly at a higher airspeed the heavier you are. If you do the math for this C172 the equation would be: Va=((Weight-1900)*.02308)+90, but this is only type specific for the C172S
Aircraft have many antennas. Depending on what radio and navigation equipment the aircraft is equipped with a cessna 172 will have 2 or 3 antennas on top of the fuselage between the wings and/or aft of the cabin. Frequently 172's are equipped with a wire antenna stretched from a point between the wings to the top of the horizontal stabilizer. It is also common for small aircraft such as the 172 to have 2 or 3 antennas on the bottom of the aircraft.
Here some,matbe a lot: B707,B727,B737-100,B737-200,300,400,500,600,700,800,900,B747-100,200,300,400,500,8,8i,b747-SP,B757,B767-200,200ER,300,300ER,B777-200,200ER,300,300ER,B787,A300,A310,A320,A321,A330,A340,A340-600,A350,A380,AN124,AN225,SR-71A,F/A-18 Hornet,C172,C152,DC3,DC4,DC6,DC8,DC10,MD11,Beluga,Harrier.
In a plane like a Cessna C172 Skyhawk (most pilots should have got at least a few hours in this plane), you make sure the fuel is rich, start the magnetos, and, if the propellor is operating properly, the propellor will rotate. In jet planes, it varies. On some planes like an Airbus A321, you start the engines by flicking the two engine start switches (and I believe it just stays there), like you would turn a car key. If you flick it off they go into cutoff, which at 35,000 feet cruising across the Atlantic would probably result in death upon impact. On other planes like a Boeing 747-400, there are four switches/pully things on the overhead panel. You pull one out at a time, push it back in, pull one out, push it back in, etc.
The boiling point of a mixture of alcohol and water depends on the ratio of the two substances. For example, a solution of 20% alcohol and 80% water will have a boiling point higher than either pure alcohol or water. The boiling point elevation is due to the interactions between the alcohol and water molecules.