Top answers

An 1kg ball collides normally with a fixed vertical wall. Its incoming speed is 8 m/s and its speed after the collision is 4 m/s . Calculate the change in momentum of the particle. If the collision lasts 0.5 s calculate the impact force.

Consider two scenarios before and after. Before there is a velocity of 8m/s (with right being positive) and mass 1kg. after there is a mass of 1kg and a velocity of -4 m/s as right is positive and it bounces...
AD
Answered by Adam D. • Maths tutor
4401 Views

What does far right and far left mean? (In the context of the Weimer Republic and the popular modern Germany GCSE module)

As you know, in the Weimar Republic there were challenges to the Republic from groups who held far left beliefs, such as the Spartacists, and far right beliefs, such as the Freikorps. But what do the labels ...
AE
Answered by Arran E. • History tutor
8905 Views

What does ‘aromatic’ mean?

In A Level Chemistry, the word aromatic means a molecule’s structure contains at least one cyclic ring which has a delocalised pi electron cloud above and below it. This occurs from unbonded P orbital electr...
SL
Answered by Sam L. • Chemistry tutor
3963 Views

A curve has equation y = x^3 - 6x^2 - 15x. The curve has a stationary point M where x = -1. Find the x-coordinate of the other stationary point on the curve.

A stationary point can be found when dy/dx = 0 . The first thing we need to do is differentiate y to find dy/dx, and solve it for dy/dx = 0. This gives usdy/dx = 3x 2 - 12x - 15 = 0 = (3x + 3)(x - 5) = 0 (us...
EG
Answered by Ellie G. • Maths tutor
8566 Views

What is the difference between a symbol and a motif?

A symbol is often an object that is described in a text which has a deeper meaning than what it may seem at surface level. It appears singularly or few times throughout a novel or play, for example, flying b...
CS
6240 Views