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How to form the perfect tense in French using 'avoir'.

If we want to express a completed action which happened in the past in French, we use the perfect tense. In order to form it we use either avoir or etre and conjugate them in the present form and then add th...
HA
Answered by Hannah A. • French tutor
5748 Views

How do I subtract one fraction from another?

If you have the question: What is 2/3 minus 1/5? You should start this question by looking at the demoniators (the bottom of the fraction). You want to get a number that is divisible by both 3 and 5. An exam...
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Answered by Jessica C. • Maths tutor
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A walker falls through thin ice into very cold water. What does the body do to stop the core body temperature from falling too quickly?

The walker's body will do three things to help slow the decrease in core body temperature. The first is the walker will begin to shiver. Shivering is the spasming of muscles, the muscles as they work generat...
JT
Answered by Jack T. • Biology tutor
11101 Views

A metal oxide has a relative formula mass (Mr ) of 81. The formula of this metal oxide is MO. Given that the relative atomic mass (Ar ) of oxygen is 16, what is the metal in the metal oxide?

The formula of the metal oxide is MO, which means there is only one oxygen atom bonded to the metal. The Mr of a compound is the sum of Ar of the elements that make up the compound. So, from this we can cons...
JT
Answered by Jack T. • Chemistry tutor
37744 Views

What is albedo and why is it important in climate change?

Albedo is the reflectivity of a surface. A surface that has a high albedo reflects a lot of solar radiation from the sun back into the atmosphere, whilst a surface that has a low albedo reflects little solar...
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Answered by Faith P. • Geography tutor
51987 Views