Stay warm with hot savings 20% off hoodies & sweatshirts
Promo code: BUNDLEUP
Redeem Code NowVoucher active
Valid until 30/09/18. Can’t be combined with other discount codes or volume discounts. Only applies to product(s) mentioned in offer. Valid on www.spreadshirt.co.uk. Not valid in Spreadshirt’s Partner Shops.
In the style worn by Dr Sheldon Cooper, it is the change in frequency of a wave for an observer moving relative to the source of the wave. It is commonly heard when a vehicle sounding a siren or horn approaches, passes, and recedes from an observer.
Tags: Doppler Effect, Dr Sheldon Cooper, Miscellaneous, Sheldon Lee Cooper, The Big Bang Theory, penny, tbbt