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Solve (4x10^-3)x(9x10^4)

The answer is 1.3x10^2. To solve this you need to multiply the integers first to get 13. The exponents (x10^4 for example) are then multiplied, since it is multiplication the powers are simply added to give ...
PR
Answered by Philippe R. • Maths tutor
7234 Views

A ball is initially at rest and is dropped from a height of 10m. Calculate the velocity of the ball when it reaches the ground

For this we need to use a SUVAT equation. S=displacement U=initial velocity V=final velocity A=acceleration T=time In the question we are give U=0m/s since the ball is at rest to start with Since the ball is...
CG
Answered by Catherine G. • Physics tutor
11800 Views

Factorise x^2 + 2x - 3

This is in the form Ax^2+Bx +C where A=1 B=2 and C=-3 We need to find two numbers (let's call them p and q) which multiply to equal C and add to equal B. Since C is negative we need a positive number and a n...
CG
Answered by Catherine G. • Maths tutor
8524 Views

What is the correct order of the reflex arc?

Students must select 1 of the following: a) Motor - Sensory - Relay b) Effector - Relay - Motor c) Sensory - Relay - Motor d) Relay - Motor - Sensory The correct answer is C. When a stimulus is detected by a...
BS
Answered by Beth S. • Biology tutor
15745 Views

I know how to integrate, but I still never see any real world example of it, so it is difficult to understand. Why is it useful?

(In tandem with the whiteboard) Integration is a way of working out the total of something. An example of this is if you see a graph of velocity and time, the area under the graph is the total distance trave...
CM
Answered by Cain M. • Maths tutor
3657 Views