A roller coaster car of mass M=200 KG is released from rest at the top of a 60 m high hill (position a )and rolls with negligible friction down the hill ,through a circular loop with a height of 40 M ( positions B, C and D) and along a horizontal track (to position E)

Idid the calculation and i get 875,000,000 which can be written as 8.75 x 10^6?

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m

Carbon dioxide and water