Answer:
Explanation:
Given
Temperature of Room 
Area of Person 
Temperature of skin 
Heat transfer coefficient 
Emissivity of the skin and clothes 

Total rate of heat transfer=heat Transfer due to Radiation +heat transfer through convection
Heat transfer due radiation 
where 


Heat Transfer due to convection is given by




Machines makes work easier by increasing the amount of force that is applied, and changing the direction in which the force is applied !! Hope it helped (p.s. I had this same question)
The gravitational force is gravity meanwhile the electric force is electric
Each parent contribute 50 percent. A person have 46 genes and 23 comes from the mother and 23 comes from the father