Ant Manor’s small classroom will update different questions every day. As long as users answer the questions correctly, they can get daily chicken feed immediately and easily feed chickens for charity. Let’s take a look at the latest questions in today’s class with the editor. Answer, complete the answer quickly!
Question 1: Some people say that the label at the bottom of the thermos cup cannot be peeled off, as it will affect the insulation effect. Is there any scientific basis?
Answer: Really well-founded
Knowledge expansion: The sticker does protect the "vacuum"! And the thermos cup with the sticker on the bottom may also be dropped and leak. This is related to the principle of the thermos cup. Insulation is usually achieved by two layers of metal barrels separated by vacuum. Because the thermal conductivity of vacuum is very poor, the liquid in the inner tank can be kept warm.
Question 2: Why is it that power banks are not allowed to be checked in but can be taken on the plane?
Answer: Consignment is prone to crushing and collision
Knowledge expansion: The batteries of most power banks are lithium batteries. Lithium is a very unstable metal and can easily generate high temperatures or even spontaneously ignite after being impacted and squeezed. If lithium batteries are put into checked luggage, the luggage will be squeezed and collided in the small cargo space, which can easily cause the lithium batteries to spontaneously ignite, posing a serious safety threat to the aircraft.