It is a solid when is frozen and a liquid when it melts
4896
0.85 x 45 x 128 = 4896
Change in energy = specific heat capacity x mass x change in temperature
a) KE=0.5*mv^2==0.5*145*25^2=45312.5 J
b) PE=mgh=145*9.8*3.5=4973.5 J
c) ME=KE+PE=m(0.5v^2+gh)=62524 J
90km per hour. Speed = distance÷time Speed= 225/2.5. Speed = 90Km per hour
A cart is pulled by horizontal force such that it moves with constant velocity
So here since velocity is constant we can say that its acceleration will be ZERO
now here for zero acceleration we can say

So here we will have

here we know that

so we will have


so here applied force on handle will be
<em>b. 10 N</em>