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A bomb of mass 34kg, at rest is detonated. The explosion splits the bomb into two pieces, one of mass 13kg, which is thrown to the left at a velocity of 28 m/s. What is the velocity of the second piece?

In a collision where no external forces act linear momentum is conserved.Convention: Right + left -0=-13x28 + 21xVV=17.33 kg m/s to the right
RC
Answered by Rory C. • Physics tutor
2170 Views

There are 10 boys and 20 girls in a class. The class has a test. The mean mark for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys

Find the total number of people in the class 10+20=30 find the total number of marks achieved by the class 60x30=1800 since the mean mark for the girls is 54, you can work out the total marks achieved by the...
DT
Answered by Dessi T. • Maths tutor
4207 Views

Solve 10x - 7 = 4x + 5

Firstly, we want to gather similar terms. This means that we want to rearrange the equation so that all the x terms are on one side of the = sign and all the constants (the "ordinary" numbers) are ...
MO
Answered by Mary O. • Maths tutor
5160 Views

Solve the inequality: x^2 - x < 12

Firstly, the equation should be rearranged to get all the non-zero terms onto one side, with the simplest way of doing this being subtracting 12 from both sides, giving the equation x 2 - x - 12 &lt; 0. Then...
TH
Answered by Thomas H. • Maths tutor
8169 Views

What is active transport?

This is a form of movement of molecules. This is the movement of molecules from an area of low concentration to an area of high concentration (against the concentration gradient) across a membrane. As it is ...
ZW
Answered by Zimeng W. • Biology tutor
3222 Views