When the solution used begins to change color and stays the new color for at least 30 seconds we are able to tell that the solution has reached the end point of titration
The answer that is most likely true about ocean temperatures surrounding Australia, which is marked by the star in the following map is that b) the ocean temperatures north of Australia are higher than the ocean temperatures south of Australia.
Answer:
The final temperature will be close to 20°C
Explanation:
First of all, the resulting temperature of the mix can't be higher than the hot substance's (80°C) or lower than the cold one's (20°C). So options d) and e) are imposible.
Now, due to the high heat capacity of water (4,1813 J/mol*K) it can absorb a huge amount of heat without having a great increment in its temperature. On the other hand, copper have a small heat capacity (0,385 J/mol*K)in comparison.
In conclusion, the copper will release its heat decreasing importantly its temperature and the water will absorb that heat resulting in a small increment of temperature. So the final temperature will be close to 20°C
<u>This analysis can be done because we have equal masses of both substances. </u>
Because when water is a solid the molecules are packed together,making it dense, but it expands because of how cold it is, almost in the same way like heat
Answer:
Explanation:
Potential energy can be found by multiplying the mass by the height by the gravitational acceleration.
The mass is 45 kilograms. The height is 2 meters. The gravitational acceleration on Earth is 9.8 meters per seconds squared.
Substitute the values into the formula.
Multiply.
1 kg*m/s^² is equal to 1 Newton (N). Substitute N in for kg*m/s²
1 Newton meter (N*m) is equal to 1 Joule (J). Our current answer is equivalent to 882 Joules.
The sled's potential energy is 882 Joules.
