Answer:
Explanation:
a )
m = m₀ 
m is mass after time t . original mass is m₀ , λ is disintegration constant
λ = .693 / half life
= .693 / 1590
= .0004358
m = m₀ 
b )
m = 50 x 
= 40.21 mg .
c )
40 = 50 
.8 = 
= 1.25
.0004358 t = .22314
t = 512 years .
magnet B has a greater magnetic pull than magnet A
- wet seving has ben
Explanation:
1. wet seving has been propsed as amethofolog to study aggregete stability aganist watet erosion
87.5 I believe because it needs 2.5 L and we multiply 35 by 2.5 because 1 liter needs 35 grams