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1. Hello,
The answer for the first question is E.
The answer for the second is E as well.
The answer for the third is D
I am having difficulty understanding how the answers are obtained.

2. 1. Find the velocity at which the KE is 1800J with KE = 1/2mv^2. Use suvat to to find the final V after further 2 more seconds of accelerating.Use KE = 1/2mv^2 to find KE. Do the maths and you'll get E.

2. Gene for amylase present in DNA in any cell.Liver cells have 46 chromosomes, 2 are sex chromosomes, in male these are XY and YY in female.

3. Length of cube 2 is square root of 2 since Pythagoras (square root of 1^2 + 1^2). Find one area of cube 2 and take one area of cube 1 to get the area left over. Do the same for the third one. Then find the sum of all the areas of the sides and you get D.
3. (Original post by dylan1016)
1. Find the velocity at which the KE is 1800J with KE = 1/2mv^2. Use suvat to to find the final V after further 2 more seconds of accelerating.Use KE = 1/2mv^2 to find KE. Do the maths and you'll get E.

2. Gene for amylase present in DNA in any cell.Liver cells have 46 chromosomes, 2 are sex chromosomes, in male these are XY and YY in female.

3. Length of cube 2 is square root of 2 since Pythagoras (square root of 1^2 + 1^2). Find one area of cube 2 and take one area of cube 1 to get the area left over. Do the same for the third one. Then find the sum of all the areas of the sides and you get D.
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