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A cannon at ground level is firing at a fort 200m away with 20m high walls. It aims at an angle 30 degrees above the horizontal and fires cannonballs at 50m/s. Assuming no air resistance, will the cannonballs fall short, hit the walls or enter the fort?

solving horizontally, use v=s/t, where s=200, v=25(3)1/2. Hence t=s/v=8/(3)1/2 (where t is the time when the ball would reach the fort if it does not reach the ground)Solivng vertica...

Answered by Maths tutor
3405 Views

List and briefly explain the two main mechanisms by which mammalian genes can be exchanged or 'translocated' between chromosomes. What are the importance of these types of recombination? (8 marks)

i. Homologous Recombination. A conservative, error-free DNA replication pathway that mainly allows for the repair of DNA under duress and also for the resetting of replication forks. The pathway is regula...

BA
Answered by Benjamin A. Biology tutor
2503 Views

Describe how allopatric speciation occurs.

In a population of a species a barrier forms (for example the formation of a new river, or the division between two islands). This leads to two isolated groups of the original species. In the two isolated...

AP
Answered by Amelia P. Biology tutor
2893 Views

Use Integration by parts to find ∫ xsin3x dx

∫ xsin3x dx takes the form of any integral ∫ (u)(dv/dx) dx.
∫ (u)(dv/dx) dx = uv - ∫ (v)(du/dx) dx
Taking u=x and dv/dx= sin3x. The equation can be re-written in the form uv - ∫ (v)(du/dx) dx....

SV
Answered by Safiyyah V. Maths tutor
14073 Views

Why does ionisation energy decrease down group 2?

As you descend group 2, more electrons are present in the atom. These electrons fill subshells at a greater energy level. There is a greater distance between the outer shell electron and the nucleus, as w...

Answered by Chemistry tutor
6447 Views

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