Aperson eats a container of strawberry yogurt. the nutritional facts label states that it contains 255 calories (1 calorie = 4186 j). what mass of perspiration would one have to lose to get rid of this energy? at body temperature, the latent heat of vaporization of water is 2.42 106 j/kg.

mass = 0.44 Kg

Explanation:

given,                                                            

Calories contain in the strawberry yogurt = 255 calories

1 Calorie = 4186 J                                      

latent heat of vaporization = 2.42 x 10⁶ J/Kg

mass of perspiration = ?                      

Energy = 255 calories                      

Energy = 255 x 4186                            

            = 1067430 J                                    

Energy = mass x latent heat of vaporization

mass = 0.44 Kg                                                  

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray