Top answers

A ball is thrown out of a window 18m off the ground. It is thrown horizontally at 0.5m/s. Show that it takes about 2s to reach the ground

Using the initial information we can see that the acceleration in the 'y' direction is equal to 'g', so from this we can work out the velocity in the 'y' direction 'V(y)' by simply integrating the accelerati...
AJ
Answered by Adam J. • Physics tutor
4836 Views

The shortest side of a triangle is 4.3m long. Two of the angles are 45.1 and 51.2 degrees respectively. Find the length of the longest side.

To begin we calculate the third unknown angle in the triangle by taking the two known angles (45.1 and 51.2) away from 180 degrees (remember the interior angles of a triangle sum to 180). We find this angle ...
AJ
Answered by Adam J. • Maths tutor
6204 Views

Why does an absorption spectrum (of eg Helium) show dark lines?

Ignoring the dark lines, we have a continuous colour (visible light) spectrum. The dark lines represent where the photon of a particular wavelength is missing, hence we cant see it. This occurs when the ligh...
JB
Answered by James B. • Physics tutor
10086 Views

Discuss the nature nurture debate in Psychology?

Nature : behaviour is heredity. Nurture : behaviour is caused by the environment, experience and learning. Interactionist approach: the belief that both nature and nurture are essential to any behaviour. A k...
KV
Answered by Katie V. • Psychology tutor
19423 Views

Use integration by parts to find the integral of xsinx, with respect to x

The integration by parts rule looks like this: ∫ u * v' dx = u * v - ∫ ( v * u' ) dx Hence in this example, we want to make our u = x and v' = sinx So we now need to work out what u' and v are: u' = 1 which ...
TS
Answered by Toby S. • Maths tutor
59019 Views