Quanta Z

A train travels between two stations 6 km apart! if the maximum acceleration is 2.3 m/s^2 and the greatest deceleration is 3.45 m/s^2. Whats the shortest time between stations if the maximum speed allowed is 92 km/hr.

Please i dont understand it, explanation would be great!

thanks :)

This problem actually involves a diagram. However, i have tried to explain it as precisely and clearly as possible.

A block of mass (m1 = 3.00 kg) lies on a table. It is connected to an inextensible weightless string that goes along the table, over the edge and down. (it is supported by a frictionless pulley on the edge of the table.) A ball of mass ( m2= 5 kg) hangs on the another end of the string. The coefficient of friction between the block and the table is μk= 0.270.

The system starts from rest. Find the speed of the ball when it has fallen the distance h=1.15m.

I appreciate any help and ideas!! Thanks

The spring constant of an automobile suspension spring increases with increasing load due to a spring coil that is widest at the bottom, smoothly tapering to a smaller diameter near the top. The result is a softer ride on normal road surfaces from the wider coils, but the car does not bottom out on bumps because when the lower coils collapse, the stiffer coils near the top absorb the load. For such springs, the force exerted by the spring can be empirically found to be given by

F = axb.

For a tapered spiral spring that compresses 12.7 cm with a 1000 N load and 30.5 cm with a 5000 N load, do the following.

a) Find constants a,b in the empirical equation F

b)Find the work needed to compress the spring 27.5 cm.

Thx. :)

A hand-turn generator is connected to a light globe (bulb) in series with a switch. Is it easier to turn the coil when the switch is open or when it is closed?

Please EXPLAIN the reasons!!

hello guys, i gave my 4 U maths assessment task about a month ago, and i got just 64%. is the marks fine?? i think it's too low to benefit my UAI and I dunno much bout' the marks scaling../ranking..whatever? Should i continue doing it??? or is it better 4 me to drop it? I am going quite easy it....but the "Graph questions" often ranks me down. so.....plz suggest me what should i do?

Toe nail of my right foot is gradually stretching to one side piercing the toe muscles on sideways. The part (of toe) is swollen and dark bluish in appearance with pus emission(sometimes). I have been using "OVIDON" gel in the infected area. But it's not healing. the infection has already persisted for long ( more than 3 weeks). And it really hurts.

plz, help me..............what r the solutions to this?? What steps should i undertake???

has anybody else got a newspaper article that can be related to belonging/not-belonging with full analysis of the text (language techniques being used, links to belonging/not-belonging, personal response.) Best description will be awarded 10 points......

Were there any experiments that he carried out in his lifetime......to prove something. (either theoretical or practical). I am not lookin' for his inventions( saturn V launch vehicle, V-2 rockets.) I want something that he experimented.....TO PROVE SOMETHING (may be some physical laws.) whether he failed or succeed,

I've already referred to wikipedia and other major organizational sites (involved in rocketry) which includes his biography, contribution and.......but couldn't get the precise/concise answer. So, plz help me asap. ANY KIND OF RELEVANT HELP WOULD BE APPRECIATED.

Thx a bunch!!!

ITS RELATED TO IT.

My reference book says, "Blue crabs can increase their ability to carry oxygen by changing the pH of blood". But How??? Plz, explain in detail. Are there any other adaptation features of blue crabs that help them to survive in highly saline environments?

plz list the functions of the fludrocortisone as the replacement for aldosterone

The equation of two adjacent sides of a rhombus are y=2x + 4 and y = -(x/3) +4 .

If A(12,0) is one vertex and all the vertices have positive co-ordinates, find the co-ordinates of the other 3 sides.

Plz, include full working out.

Thnx...

describe it based on its radiation(beta emission)

not just for respiration and energy, i want more than that.