Answer:
In an exothermic reaction the energy gained by the surroundings must be <u>equal to</u> the energy lost by the reaction.
Explanation:
Exothermic reactions occur by the loss of energy in the form of heat to the surroundings (apparatus and the system).
The heat gained can be quantitatively analysed and measured provided no product escapes the system and it is numerically equal to the amount of heat lost by the reaction.
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Milimetres are before centimetres and centimetres are before metres
The answer to this question is B.)
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Answer:
Because the Magnetic Field lines are closed- we need to express, which area of the space is considered for the given direction
Explanation:
The magnetic field lines have enclosed nature- they do look like a circle. Once we consider a permanent magnet with the north and south pole, in the area outside from the magnet, lines go from the North towards the South pole, where they enter the magnet. However, inside the magnet, these lines have direction from the south to the north pole to close the ends of the line. So, once we consider the directions of the magnetic field inside the magnet, the given statement is not correct.
The type of investigation is she is conducting by determining the period in which it is from is referred to as the geologic age.
<h3>What is Geologic age?</h3>
This is defined as the time period in which the fossil was present on the earth and can be done using various methods such as radiometric dating methods etc. The age gotten will help scientists to ascertain different information about the organism in this context.
Fossil on the other hand which is the remains of organisms preserved in the earth crust can be studied to find out the differences in the features of organisms and how they were able to adapt to the changing environmental conditions.
Read more about Fossil here brainly.com/question/11829803
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