A5ml solution of ^{131}i was assyaed to be 3.7gbq at 09: 00 am wednesday 1^{st} june 2011. an activity of 800mbq is required for administration to a patient at 09: 00 am on monday 6^{th} june 2011. what volume of this ^{131}i solution is required for administration
b) estimate the weight of ^{131}i in 800mbq administerd solution
addtional information
^{131}i physical half life = 8 days, avigadros comsatnt=6\times 10^{23}mol^{-1}

9.3 m/s

Explanation:

The change in momentum of the ball is equal to the impulse given to the ball, which is equal to the product between the force exerted and the time taken:

where:

F = 55 N is the force exerted on the ball

is the duration of the collision

Substituting, we find the change in momentum of the ball:

The change in momentum of the ball can also be written as:

where:

m = 0.060 kg is the mass

u = -32 m/s is the initial velocity

v = ? is the final velocity

By re-arranging the equation, we can find the final velocity of the ball after it hits the ground:

And the positive sign tells us that the direction of the velocity is upward (opposite to the initial velocity, which was downward)