Leaves a Bad Taste: Large Vanilla McCafe Shake: 820 calories. A large (22 oz) vanilla milkshake from the McCafe will set you back 820 calories. That's about two-thirds of a whole day's calorie content of 1,500, recommend for weight loss. A medium (16 oz) shake has 670 calories, while the small (12 oz) vanilla milkshake has 530 calories.
Darkness doesnât involve waves because itâs a lack of electromagnetic waves. If you define the speed of dark to be the speed at which you could find out about someone turning out the lights, itâs exactly the same as the speed of light: 671 million mph, or 2.99 x 108 m/s, or about 1 foot per nanosecond.
Credit: Iscatel | Shutterstock. The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light. In miles per hour, light speed is, well, a lot: about 670,616,629 mph. If you could travel at the speed of light, you could go around the Earth 7.5 times in one second. Early scientists, unable to perceive lightâs motion, thought it must travel instantaneously. Over time, however, measurements of the motion of these wave-like particles became more and more precise.