Describe what happens to the kinetic energy of a snowball as it rolls across the lawn and gains mass

KE should decrease

The momentum, p(t)=m(t)⋅v(t), of the snowball should remain constant as there is no external force acting on the system, that is the snowball and the snowflakes it gathers, in the direction of travel.

i.e. ΣF=.p=0 so p=const.

As for KE, T(t)=12mv2=p22m=const.m

as mass is increasing, KE should decrease

this has greatly simplified it all, as it looks at it as a point mass

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml