The 500 pages of a book have a mass of 2.50 kg. What is the mass of each page A in kg B in mg?

A.

Mass per page = mass of book / number of pages

Mass per page = 2.5kg / 500 pages = 0.005kg

B.

Mass per page = mass of book / number of pages

Total mass = 2.5kg = 2,500grams = 2,500,000mili grams

Mass per page = 2500000mg / 500 pages = 5000mg

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can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s