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Explain the changes in momentum when a satellite fires its propulsion system (3 marks) This is from the 2008 HSC. When answering this question do I refer to the law of conservation of momentum and how in a closed system interaction, the momentum is always unchanged. So when the propulsion is...

Im having problems with question 4 part ii part alpha. The answers just say if y=a. Then pq=1 Thanks for any help

A 50Kg man climbs to the top of a bungee jump platform, exactly 100m above a river. he is securely attached to a rubber bungee rope. The man leaps off the platform. He free falls for 50m and then the bungee rope stretches a further 50m, stopping the man safely, just above the river. a)...

A particle executes simple harmonic motion. When it is 2cm from its equilibrium position, its velocity is 6cm/s; when it is 3cm, its velocity is 4cm/s. Find the period of its motion and the amplitude. Thanks! Any help will be repped.

Two Straight roads meet at an angle of 60 degrees. Car A starts from the intersection and travels along one road at 40km/h. one hour later Car B starts from the intersection and travels along the other road at 50 km/h. At what rate is the distance between them changing three hours after Car A...

The normals to the parabola x^2=4ay at the point P(2at,at^2) and Q(2as,as^2) meet at R. Find the co-ordinates of R in terms of t and s. If st=-2, find the cartesian equation of the locus of R I've been stuck on this for quite a while. Any help would be appreciated.

Heu Guys, I need help with question b part iii. not too sure on how to do it. help would be appreciated. Thanks in advance!

Hey guys, Chemical engineering is one of the career paths that take my interest. The concept of this discipline just amazes me. This is all good and dandy but I am wondering what are the job prospects for chemical engineers in Australia? I know I have a while before uni but I just thought an...

I cant seem to find anything to show that their similar. Any help would be appreciated Thanks in Advance

If P= cosx/2 and q= sin^3x, find sin^2x+ cos^2x in terms of p and q. Thanks for any help!

Can someone please help me with part V of the question. THANKS! in advance

This question has got me stumped. Any help would be appreciated. Thanks.

a,b and c are positive, consecutive terms of a geometric series. Show that the graph for y= ax^2+ bx+c is entirely above the x-axis. Thanks!

Find the volume of the solid formed when the region bounded by the parabola, y=9-x^2 and the co-ordinate axes is rotated a) about the X-axis b) about the Y-axis Thank in advance, working out would be appreciated.

The line y=x+4 cuts the parabola with equation y=x^2-2x at two points A and B. Find the magnitude of the angles that the tangents to the curve at A and B make with the X-axis. Thank you in advance for any help. (working out would be appreciated)

A body is thrown vertically upwards with a velocity of 12.6 m/s. What time elapses before its velocity is 9m/s Working out would be appreciated. thanks

The slant edge of a right circular cone is 6cm in length. Find the height of the cone when the volume is a maximum. Thanks in advance (working out would be appreciated)

A rectangular area is to be fenced and divided into six rectangles by one dividing fence parallel to its length and two fences parallel to its breadth. If the total length of fencing available is 120m, find the maximum possible area. Can someone please answer this with working out Thanks