Two experimental runs are performed to determine the calorimetric properties of an alcohol that has a melting point of -10°c. in the first run, a 200-g cube of frozen alcohol, at the melting point, is added to 300 g of water at 20°c in a styrofoam container. when thermal equilibrium is reached, the alcohol-water solution is at a temperature of 5.0°c. in the second run, an identical cube of alcohol is added to 500 g of water at 20°c and the temperature at thermal equilibrium is 10°c. the specific heat of water is 4190 j/kg • k. assume that no heat is exchanged with the styrofoam container and with the surroundings. the heat of fusion of the alcohol is closest to

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.