Absolutely a fabulous video! Question. I have a goose down coat with a canvas style exterior. Have you ever tried to waterproof this type of coat? Obviously my concern is getting the wax inside where it would probably damage the goose down. Any thoughts?
8 months ago | 0
I must ask, have you ever thought of making a book with all these recipes? Personally I collect books with useful information for if the internet fall. You have so much amazing and useful information. Would save me the time 😅
3 months ago | 0
I would like to clearly see the motion of thermal convection patterns in heated water, at different points, in a DIY experiment to improve the electrical heating EFFICIENCY of the devices in this brief report: Scientific Report: Energy Efficiency of Appliances for Heating Water Introduction Heating water is a common task in households, but different appliances use energy in different ways. This report compares the energy efficiency of five appliances: electric kettles, induction cooktops, microwave ovens, halogen quartz ovens, and traditional electric ovens. Efficiency matters because using less energy saves money and reduces environmental impact. Methods To compare efficiency, we calculated the energy required to heat 1 liter of water from 20°C to 100°C (boiling). 1. Theoretical Energy Requirement The energy needed to heat water is calculated using the formula: \[ Q = m \cdot c \cdot \Delta T \] Where: - \( Q \) = energy (in joules) - \( m \) = mass of water (1 kg for 1 liter) - \( c \) = specific heat capacity of water (\( 4184 \, \text{J/kg°C} \)) - \( \Delta T \) = temperature change (\( 80°C \)) Plugging in the values: \[ Q = 1 \, \text{kg} \cdot 4184 \, \text{J/kg°C} \cdot 80°C = 334,720 \, \text{J} \, (\approx 0.093 \, \text{kWh}) \] 2. Real-World Efficiency Appliances waste energy due to heat loss. Efficiency (%) measures how much energy is actually used to heat the water. For example, if an appliance is 80% efficient, it uses 20% more energy than the theoretical minimum. Results The table below shows the efficiency and energy use of each appliance: | Appliance | Efficiency | Energy Used (kWh) | |---------------------------|----------------|-----------------------| | Electric Kettle | 80–90% | 0.103–0.109 | | Induction Cooktop | 84–90% | 0.109 | | Microwave Oven | 50–65% | 0.155 | | Halogen Quartz Oven | 60–70% | 0.143 | | Traditional Electric Oven | 50–75% | 0.155+ | Discussion 1. Electric Kettle (Most Efficient) - Why it works: Heating elements are submerged in water, transferring heat directly with minimal loss. - Pros: Fast, purpose-built for boiling water, automatic shutoff. - Cons: Only heats water; not useful for cooking. 2. Induction Cooktop - Why it works: Uses magnetic fields to heat the pot directly, avoiding energy waste. - Pros: Very fast and efficient. - Cons: Requires magnetic pots/pans (e.g., stainless steel). 3. Microwave Oven - Why it works: Microwaves vibrate water molecules to create heat. - Pros: Good for small amounts (e.g., a cup of tea). - Cons: Wastes energy heating the container; uneven heating. 4. Halogen Quartz Oven - Why it works: Infrared radiation heats the cookware surface. - Pros: Faster than traditional ovens. - Cons: Loses heat to the surrounding air. 5. Traditional Electric Oven (Least Efficient) - Why it works: Coils heat up, transferring heat to the pot through contact. - Pros: Works with any cookware. - Cons: Slow; loses heat to the air and stovetop. Conclusion The electric kettle is the most energy-efficient appliance for heating water, using about 0.103–0.109 kWh to boil 1 liter. Induction cooktops are almost as efficient but require special cookware. Microwaves work well for small volumes, while halogen and traditional ovens waste the most energy. Practical Tip: Use an electric kettle whenever possible to save energy. For larger amounts or cooking tasks, induction cooktops are a good alternative. Application to Daily Life Choosing energy-efficient appliances can reduce electricity bills and lower greenhouse gas emissions. For example, boiling water daily with a kettle instead of a traditional oven could save a household over 50 kWh per year—enough to power a laptop for 500 hours! Further Questions - Can you make a more efficient and expedient DIY design? - How does altitude affect boiling time and energy use? - Could solar-powered kettles improve sustainability?
3 months ago
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Man it's been a long time, haven't heard that name since 2016 with gizmoslip
8 months ago
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NightHawkInLight
My friend Darren from Beyond Slow Motion has put together a collection of tips from years of experience filming action sports. It's worth a watch!
https://youtu.be/Uwy1-hXWZrs?si=Jj4bX...
8 months ago | [YT] | 124