Answer:
b. only within the moon’s umbra.
Explanation:
Solar eclipse occurs when Moon comes between the Sun and the Earth in straight line and blocks the sunlight. A shadow of moon castes on the surface of the Earth. The region passing through the moon's umbra would view a total solar eclipse. The moon completely hides the surface of the sun. It would be visible to the people residing in the bright side of the Earth within the Umbra of the moon.
The use the method of concomitant variations we need to identify the variables, establish a baseline, introduce variation and compare results.
To use the method of concomitant variations to confirm whether running your ceiling fan stirs up dust and causes your table to become dusty, follow these steps:
1. Identify the variables: In this case, the independent variable is the operation of the ceiling fan (on or off), and the dependent variable is the dust accumulation on your table.
2. Establish a baseline: Observe the dust accumulation on your table when the ceiling fan is off for a specific period, let's say 24 hours. Document the amount of dust on the table.
3. Introduce variation: Turn on the ceiling fan and observe the dust accumulation on your table for the same period (24 hours). Document the amount of dust on the table.
4. Compare results: Compare the dust levels on your table when the ceiling fan was off versus when it was on. If there is a concomitant (simultaneous) increase in dust accumulation when the fan is on, this suggests a relationship between the operation of the ceiling fan and the dust on your table.
5. Repeat the process: To strengthen your evidence, perform the same experiment multiple times, alternating between turning the fan on and off. If the pattern of increased dust accumulation consistently occurs when the fan is on, this further supports the hypothesis that the ceiling fan stirs up dust and causes your table to become dusty.
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Answer:
Increasing the pitch of a note on the piano means you make the note higher
B. most metals.
C. glass objects.
D. caramel candy.
The answer is Glass objects C. in this case.
Answer:
Power efficiency
Explanation:
The power efficiency tells us how much efficient is a process, the bigger value we can obtain is 1, that means that we are not wasting energy, in real life, it is always below 1 because some energy is wasted on heat or other undesired process. that's why the output power is always lower than the input power.