I learned this today. An airbag can inflate so quickly because it contains sodium azide, which produces nitrogen gas when it ignites. When you are in a car crash, a series of steps happen to launch the airbags. An accelerometer measures that the car has rapidly decelerated. Impact sensors work out where the impact has […]
#9 How can an airbag inflate so quickly? Read More »
I learned this today. Vantablack is the blackest material ever made because it absorbs 99.965% of light. Anything that you have in front of you right now is reflecting light back into your eyes. For example, my phone case is red with a brown cat on it. It is night, so there is no sunlight.
#8 How can Vantablack be so black? Read More »
I learned this today. Salt preserves food by removing the water and vinegar preserves food by increasing its acidity. The refrigerator was invented in 1834. Before that, people used ice to keep food chilled. In the 1800s, Americans used over 5 million tons of ice annually. The ice was cut from northern countries (Scandinavian countries)
#7 How do salting and pickling preserve food? Read More »
I learned this today. Vultures can eat rotten meat that would make us very sick because their stomach acid is 100 times stronger than ours. If you or I were to go and find a dead animal by the side of the road and eat it, we would get very sick within a few hours.
#4 How can vultures eat rotten meat and not get sick? Read More »
