Top answers

Two balls of identical size and shape are dropped from the same height. One ball has a mass of 50kg and the other has a mass of only 10kg. Why do they reach the ground at the same time?

The only forces acting on the balls are gravity (pulling down) and air resistance (pushing up). Since the balls are the same shape and size, the air resistance will be the same on both. Likewise, the gravita...
GP
Answered by Gregor P. • Physics tutor
17705 Views

How do you know when to use the imperfect tense and when to use the perfect tense?

Simply, the imperfect tense is used to convey an action in the past that was taking place over a period of time e.g. 'Je regardais la télé' = 'I was watching TV' - the act of watching TV was not instantaneou...
GE
Answered by George E. • French tutor
3150 Views

Solve for X and Y: 2y + x = 7; 3y - x = 8

x=1, y=3; Firstly, rearranging for x in the first equation: x = (7-2y); Substitute this into the second equation: 3y - (7 -2y) = 8; Expand: 3y -7 +2y = 8 (watch negative) 3y +2y = 15 Therefore, 5y = 15 and y...
RK
Answered by Ruth K. • Maths tutor
5852 Views

A right-angled triangle has side lengths of 8.65cm and 10.15cm. What is the length of its hypotenuse?

Step 1: Draw a labelled diagram of the triangle, marking the side lengths. Step 2: Recall Pythagoras’ theorem equation ‘c2=a2+b2’ Step 3: Substitute the values of a and b into the equation. c2=8.652+10.152 S...
AM
Answered by Alisha M. • Maths tutor
4011 Views

What is the best way to revise for my Maths GCSE?

I believe that there is no better way to revise for Maths than to continually practice questions (especially those that you find most tricky!) The more you practise, the easier you'll find the questions beca...
AM
Answered by Alisha M. • Maths tutor
4338 Views