A hydrogen fuel cell produces energy through an electrochemical reaction between hydrogen and oxygen. Hydrogen gas is fed into the anode side of the fuel cell, where it is split into protons and electrons. The protons travel through an electrolyte membrane to the cathode side, while the electrons flow through an external circuit, creating an electric current. At the cathode, the protons, electrons, and oxygen from the air combine to produce water and release energy in the form of electricity. **

If the milk packaging indicates 15% fat and there is 200ml of milk, you would use 30ml of fat from the milk for the mashed potatoes. This can be calculated by multiplying 200ml by 15% (0.15). However, the amount of milk needed for the mashed potatoes will depend on the recipe and personal preference for consistency. **

A standard cup of coffee typically contains around 120-180ml of liquid, so if you are adding 200ml of milk to it, you may end up with a larger than usual cup of coffee. However, the exact amount of milk you add to your coffee is a matter of personal preference. Some people may prefer a stronger coffee flavor and only add a splash of milk, while others may prefer a more creamy and milky coffee and add more. Ultimately, the amount of milk you add to your coffee is up to you and your taste preferences. **

A hydrogen fuel cell is a device that converts the chemical energy of hydrogen and oxygen into electricity through an electrochemical reaction. It consists of an anode, a cathode, and an electrolyte membrane. Hydrogen gas is fed into the anode, where it is split into protons and electrons. The protons pass through the electrolyte membrane to the cathode, while the electrons flow through an external circuit, creating an electric current. At the cathode, the protons, electrons, and oxygen from the air combine to produce water and heat as byproducts. This process is clean and efficient, making hydrogen fuel cells a promising alternative to traditional combustion engines. **

Green tea with milk is not necessarily bad for you, but it may not be the healthiest choice. The milk can potentially reduce the antioxidant properties of green tea, which are beneficial for health. Additionally, some people may experience digestive issues when combining dairy with tea. It is best to enjoy green tea on its own to fully reap its health benefits. **

It typically takes me about 2-3 weeks to use up 200ml of body lotion, depending on how frequently I apply it and the size of the area I cover. If I use the lotion daily on my entire body, it may last closer to 2 weeks. However, if I only use it on specific areas or every other day, it could last closer to 3 weeks. **

These plant-based beverages are called milk instead of juice because they are made by blending or extracting the liquid from the nuts, grains, or seeds, similar to the process of making dairy milk. The term "milk" is used to describe the creamy, liquid consistency of these beverages, which is similar to dairy milk. Additionally, using the term "milk" helps consumers understand how these plant-based alternatives can be used as substitutes for dairy milk in cooking and baking. **

A 200ml sunscreen with SPF 30 may not be enough for a week-long beach vacation, especially if it is being used by multiple people. The amount of sunscreen needed for a week will depend on factors such as the frequency of application, the number of people using it, and the intensity of sun exposure. It is recommended to use about 30ml (or about an ounce) of sunscreen for the entire body for each application, and to reapply every 2 hours or after swimming or sweating. It's important to consider these factors and potentially bring additional sunscreen to ensure adequate protection for a week-long beach vacation. **