What is the difference between the natural and forced convection? The key difference between natural and forced convection is that in natural convection, the motion of the fluid is influenced by natural means whereas, in forced convection, the motion of fluids is influenced by external means. What are the two differences between free and forced […]
Which statement best describes the difference between a physical change and a chemical change?
Which statement best describes the difference between a physical change and a chemical change? Thus, we can conclude that the statement a physical change is a change from one state of matter to another; a chemical change results in a new substance formed, is correct. What are the 5 chemical changes? The five conditions of […]
What two factors determine wave speed?
What two factors determine wave speed? Waves travel through a medium: A medium is any substance or region through which a wave is transmitted. The speed of a wave is dependant on four factors: wavelength, frequency, medium, and temperature. Wave speed is calculated by multiplying the wavelength times the frequency (speed = l * f). […]
What happens if you drink water with high nitrates?
What happens if you drink water with high nitrates? Consuming too much nitrate can affect how blood carries oxygen and can cause methemoglobinemia (also known as blue baby syndrome). The U.S. Environmental Protection Agency (EPA) standard for nitrate in drinking water is 10 milligrams of nitrate (measured as nitrogen) per liter of drinking water (mg/L). […]
What if petrol is used in diesel engine?
What if petrol is used in diesel engine? Putting petrol in a diesel car can cause serious damage to the fuel injection system and the engine. Serious engine damage may also occur due to detonation caused by uncontrolled petrol ignition under the much higher compression ratio in diesel engines. How much pressure does it take […]
What are the 12 steps of the scientific method?
What are the 12 steps of the scientific method? Let’s build some intuition for the scientific method by applying its steps to a practical problem from everyday life. Make an observation. Ask a question. Propose a hypothesis. Make predictions. Test the predictions. Iterate. What type of question can the scientific method attempt to answer? Hypothesis […]
How long does it take to develop a new product?
How long does it take to develop a new product? If you have an experienced product developer on your founder team, and you have a product of moderate complexity, then you should be able to get your first prototype within about 3 months, and a final works-like-looks-like prototype within about 6-9 months. Which of the […]
How many s and p electrons are in phosphorus?
Why are lays so empty?
Why are lays so empty? The cushion actually is nitrogen gas. Chip manufacturers fill bags with this preservative gas to help keep chips fresh. If it were filled with regular air, the chips would likely turn soggy and spoil. Why are crisp bags so empty? Manufacturers claim the space left in crisp packets is needed […]
Why does a paperclip sink in soapy water?
Why does a paperclip sink in soapy water? When you initially drop the paper clip into the bowl of water, it sinks, as the paperclip is too dense. Adding the dish soap breaks the bonds between the water molecules, thus breaking the surface tension and causing the paper clip to sink. Does a paperclip sink? […]