The collision cross section s represents the effective target area "seen" by the asteroid and is found by multiplying (bmax)2 by π. if the asteroid comes into this area, it is guaranteed to collide with the earth. a simple representation of the cross section is obtained when we write v in terms of ve, the escape speed from the surface of the earth. first, find an expression for ve, and let v=cve, where c is a constant of proportionality. then combine this with your result for (bmax)2 to write a simple-looking expression for s in terms of r and c.

0.3x0.21x0.08kg=mass 1 sheet

mass 500 = 500xmass 1

volume pile = 0.3x0.2x0.048

density=mass/volume= 500xmass 1/0.3x0.2x0.048

v patient student

think its the third option

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min