First ride on my new Giant today

[young Ed]

yeah but everyone knows exams are a doddle nowadays.

true, true
Cheers Ed

 

[Hollandsd]

i will make you feel better and also make me feel clever! here goes

in winter the air is colder and so it is denser and heavier so you and your bike is also colder and so denser and so weigh very slightly more in winter than summer and as the air is denser you are pushing more particles of oxygen, carbon dioxide, hydrogen and nitrogen out of your way making it harder for you as you are expending more of your energy into moving particles rather than gaining speed also due to the colder temperature your blood moves slower and so is less effective at delivering fresh oxygen to your muscles and removing carbon dioxide from them also due to the cold temperature your body spends more energy keeping warm rather than feeding your muscles!

and so it is not your age effecting your lesser performance!

i told you i would make you feel better and me feel clever!
Cheers Ed

Hi Ed
I couldn't help but comment on this one, I've been reading through this thread and wanted to correct this one (it must be the engineer in me)
The bike will never weigh any more at one time of year or another, other than the road crud you are likely to pick up during the winter, as the temperature drops you are right that the density of the material that your bike is made of will increase. Although the density increases the volume decreases a proportionate amount (mass=density x volume), this means that your 9kg bike will stay at 9kg regardless of the temperature.

If you want to get super technical your bike may weigh very slightly less on an atomic level as the material your bike is made from will have less energy (hence the density increasing) therefore will have less mass.

Fantastic thread

Cheers. Dan

 

[young Ed]

Hi Ed
I couldn't help but comment on this one, I've been reading through this thread and wanted to correct this one (it must be the engineer in me)
The bike will never weigh any more at one time of year or another, other than the road crud you are likely to pick up during the winter, as the temperature drops you are right that the density of the material that your bike is made of will increase. Although the density increases the volume decreases a proportionate amount (mass=density x volume), this means that your 9kg bike will stay at 9kg regardless of the temperature.

If you want to get super technical your bike may weigh very slightly less on an atomic level as the material your bike is made from will have less energy (hence the density increasing) therefore will have less mass.

Fantastic thread

Cheers. Dan

Of course What I meant the atoms have less energy and so weigh less giving you does weight and s less momentum going down hill and so less down hill speed
Cheers Ed