Category: Physics

How do you control heat in a building? Use light colours on the roof and external walls. Increase wall shading with verandahs, patios, pergolas or carports on North walls (this can also improve sun penetration in winter) Reduce window sizes on West facing walls. Add window shading, awnings or louvres on East, North and West […]

Is velocity ratio equal to number of pulleys? If a pulley system is perfectly efficient the mechanical advantage and the velocity ratio are both equal to the number of pulleys. How can I train my mind to be stronger than my emotions? Train your mind to be stronger than your emotions Podcast – Original recording […]

Can a bullet explode in your pocket? But the question obviously mistakenly substitutes “bullet” for “cartridge.” Regardless, small arms cartridges are made to be safe to handle. Holding a cartridge in your hand only requires the small amount of effort to hold it against gravity. They can be made to explode by exposing them to […]

Does gym affect height? If you’re a parent of a child under age 18, you might be wondering if the strength training workouts children are doing at the gym or as part of a sports team are stunting your child’s growth. While this concern about stunted growth seems legitimate, the good news is, your child […]

Can isopropyl alcohol be used as a disinfectant? Isopropyl alcohol (2-propanol), also known as isopropanol or IPA, is the most common and widely used disinfectant within pharmaceutics, hospitals, cleanrooms, and electronics or medical device manufacturing. Which is better isopropyl alcohol or ethyl alcohol? The World Health Organization suggests that 70% ethyl alcohol is superior to […]

Does a straight wire or a looped wire have a stronger magnetic field? That’s how a current carrying wire makes its magnetic field. The magnetic field of a loop, at certain points, is more than a magnetic field due to a straight wire for the simple reason that (as seen in the equation above) magnetic […]

When a hang fire or misfire happens immediately eject the cartridge or shell to clear the chamber? When a hang fire or misfire happens, immediately eject the cartridge or shell to clear the chamber. Magnum loads should be fired occasionally in all firearms to clean out the barrel. A hang fire is when the primer […]

How do I start my own construction company? The initial process of starting a construction management business can be broken down into eight steps. Develop a Good Business Plan. Choose the Location for Your Headquarters. Secure the Proper Financing. Obtain the Necessary Permits and Licenses. What is a cost consultant in construction? The cost consultant […]

What volcano has the most violent eruptions? stratovolcanoes Has Jamaica ever had snow? Average Temperatures in Jamaica Average temperatures are fairly constant throughout the year. And in the Blue Mountains the temperature often drops into the 40’s. At Blue Mountain Peak it has even been known to snow, but it does not settle. Is Jamaica […]

How do you find Ursa Major? Ursa Major — the great bear — is always above the horizon in the northern latitudes, but the best time to see it is in the spring when its high above the northeastern horizon. Ursa Major is best known as the home of the Big Dipper. Of all the […]