O 0.5
30
60
120
Answer:
the answer of the problem is going to be 120 but I'm not positive
Answer:
chemical change through chemical process .
physical change means change in dimension.
A chemical change involves a change in the substance's composition, creating new substances with different properties, typically through reactions such as rusting or combustion. In contrast, a physical change alters a substance's form without affecting its composition, as in melting or condensation processes. The processes can also be classified as exothermic (releasing heat) or endothermic (absorbing heat).
The difference between a chemical change and a physical change pertains to the composition of the substance in question. A chemical change always results in the production of a new substance with different properties from the original matter. For example, the formation of rust from iron, or the combustion process in burning, are chemical changes. These result in the creation of substances distinct from the original matter.
On the other hand, physical changes do not affect the composition of the substance, but alter its state or form, such as the melting of ice into water or the condensation of steam into liquid water. These changes, while observable, do not produce new substances, hence maintaining the original properties of the matter.
Physical and chemical changes can also be differentiated based on whether they release or absorb heat, with exothermic processes releasing heat and endothermic processes absorbing heat. For example, the burning of a fuel is an exothermic process, while the operation of a cold pack is an endothermic process.
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Answer: C
Scientists observe the layers for evidence of similar rock types and fossil formations to determine the age of landforms. If they find the same fossil in two different locations, scientists may conclude that those fossils are most likely from the same time period. The same is true for landforms made of certain types of rock. When scientists see layers of similar rock sediments, they use that as evidence to support that are from a similar time period. By analyzing the rock layers, scientists estimate that Earth is 4.6 billion years old.
Explanation:
A. charge B. resistance C. Voltage
must be
A. Negative
B. Zero
C. Positive
If an electric circuit has zero Ampere (0A) of current running through it, then the voltage must be zero.
Ohm's law states that the current flowing through an electric circuit is directly proportional to the voltage (potential difference) applied across the two terminals of an electric circuit and inversely proportional to the resistance in the electric circuit, at a constant temperature.
This ultimately implies that, the value of voltage (potential difference) is highly dependent on the value of the current running through an electric circuit.
Mathematically, Ohm's law is given by this formula;
Where:
In conclusion, if an electric circuit has zero Ampere (0A) of current running through it, then the voltage must be zero.
Read more on Ohm's law here: brainly.com/question/796939
Answer:
1. Option C: Voltage
2. Option B: Zero
Explanation:
According to Ohm's law, the current in a circuit is directly proportional to the voltage. This means, when there is potential difference across the two ends of a circuit, then only current flows.
I ∝ V
If the given circuit has 0 A current, it means that either potential is zero or resistance is infinite. Practically, we cannot have infinite resistance. This means that the voltage must be zero.