The piano key is out of tune and has a frequency of either 325 or 333 Hz
The given mass measurement contains some amount of uncertainty, this uncertainty is 0.2 g. Generally, (4.6 g±0.2 g) does not say that the “true” mass is in the interval 4.4 g to 4.8 g for sure. It means that the mass was measured with a precision of 0.2 g.
Thus, the mass measurement value of 4.6 g ± 0.2 g, describe the range of anywhere from 4.4 grams (4.6 - 0.2) to 4.8 grams (4.6 + 0.2).
Explanation:
It is known that opposite charges tend to attract each other whereas like charges tend to repel each other.
For example, when we rub a plastic pen with wool and it gets attracted towards an invisible tape then it means that there is an opposite charge present on both the objects.
A neutral object also tends to develop a charge when it comes in contact with a charged object.
Thus, we can conclude that the following statements are true.
- The tape might be positively charged.
- The tape might be uncharged.
-- Heat will flow out of the warm aluminum and into the cool water.
-- The temperature of the aluminum will fall and the temperature of the water will rise.
-- Eventually, everything in the container will settle at the same temperature, and temperatures will stop changing.
-- The final "equilibrium" temperature will be a little less than 40°C (the average of 60° and 20°), because the specific heat of the aluminum is about 8% less than the specific heat of the water. So when some quantity of heat flows from the aluminum to the water, the temperature of the water rises a little less than the temperature of the aluminum falls.
Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
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