Question

If the temperature of a hot body is raised by 4%, then heat energy radiated by it in a given time will increase by​

Answer 1

E+EdE=T4[T+1005T]4

1+EdE=[1+1.05]4

=1.2155−1=0.2155

=21.55%

Answer 2

car rounds an unbanked curve of radius 92 m without skidding at a speed of 26 ms⁻¹. The smallest possible coefficient of static friction between the tyres and the road is *