Answer:
- <u>1. The direction of heat flow is from your body to the pool or the air.</u>
<u />
- <u>2. You feel the pool feels cooler because your body temperature drops faster in the water than in the air, due to the higher specific heat capacity of water.</u>
Explanation:
The normal temperature of the body is about 98ºF.
<em><u>1. Heat direction</u></em>
The thermal energy always flows from the warmer bodies to the colder bodies. Thus, the heat from your body flows toward the air or the water.
heat flow
98ºF 80ºF
warmer colder
<u><em>2. Why the pool feels cooler than the air?</em></u>
Water has a high specific heat capacity. That makes that, for a given amount of heat, it will change its temperature little.
When your body is in water the heat of your body will flow to the water and while the themperature of the water changes little the temperature of your body changes more, in the same time. This is, the rate of cooling of your body is higher than the rate of cooling of the water.
When you compare what happens in air, since air has a lower specific heat capacity, the rate of cooling of your body is lower than in water.
Then, the temperature of your body will decrease faster in the water than in the air, which is what you interpret (feel) as the pool is cooler than the air.
Direct current is electromotive force powering from a battery. Adding bulbs increases resistance.
Resistance equals volts divided by current.
Or current equals volts divided by resistance. Current lowers.
1. B
The positive charge in water is provided by hydrogen, and gold provides the same charge. However, gold is not more reactive than hydrogen so it can not replace it in the compound.
2. In order to balance the equation, you must sure there are equal moles of each element on the left and right side of the equation:
2C₂H₆ + 7O₂ → 4CO₂ + ₆H₂O
3. The number of moles of sodium atoms on the left of the equation must be equal to the number of moles of sodium atoms on the right, as per the law of conservation of mass. The answer is B.
4. C.
A synthesis reaction usually results from single displacement because some element or compound is produced in its pure form
5. B.
The gas being produced is being synthesized.
The atomic number of an atom is the number of protons. The atomic mass is the sum of the protons and neutrons and the net charge is the difference between the number of protons which have positive charges, and electrons, which have negative charges
1) The longer the quarrying goes on the less and less recources we will have, soon leading to no more recources