Category: Physics

How much impact can a car bumper take? Today, standard passenger vehicle bumpers have a rigid reinforcing bar under the outer cover, with sections of compressible foam or plastic underneath. In the United States, passenger car bumpers must absorb a five mph impact from another vehicle with no damage to the car body. The foam […]

How does an inductor behave in a AC circuit? Hence, when a sinusoidal voltage is applied to an inductor, the voltage leads the current by one-fourth of a cycle, or by a 90º phase angle. Current lags behind voltage, since inductors oppose change in current. Changing current induces an emf. This is considered an effective […]

Are they still searching for MH370? In January 2018, under contract with the Malaysian Government, Ocean Infinity undertook a 90-day survey campaign to find the wreckage that was extended out to 138 days. That search was on a no find no fee basis and the same offer is still on the table for the Malaysians […]

Will iPhone 4S work in 2020? You can still use an iPhone 4 in 2020? Sure. Apps are WAY more CPU-intensive than they were back when the iPhone 4 was released. And this, as well as the phone’s limited specs, makes for sluggish performance and dire battery life. How much did an iPhone cost in […]

What is the purpose of gravity? Earth’s gravity is what keeps you on the ground and what causes objects to fall. Gravity is what holds the planets in orbit around the Sun and what keeps the Moon in orbit around Earth. The closer you are to an object, the stronger its gravitational pull is. Gravity […]

How are two computers connected to form a network? Step 1: Connect two Computers using an ethernet cable. Step 2: Click on Start->Control Panel->Network and Internet->Network and Sharing Center. Step 4: Select both the Wi-Fi connection and the Ethernet connection and Right-click the Wi-Fi connections. Step 5: Click on Bridge Connections. Which connects two or […]

Do LED bulbs have capacitors? Capacitors are generally used in LED drivers for smoothening and reducing the ripple coming from the power supply. Selecting the right capacitors for LED lighting systems helps in avoiding flickering, eliminates excessive heat, and ensures longevity of the LED lights. How can I make LED bulb? How to make LED […]

Is witch hazel actually bad for your skin? Overall, witch hazel is proven as safe for the skin. The caveat is that witch hazel, like anything else applied to your skin, may not work for everyone. If you’re trying out witch hazel for the first time, it’s a good idea to test it out in […]

What is the formula for energy change? To calculate an energy change for a reaction: add together the bond energies for all the bonds in the reactants – this is the ‘energy in’ add together the bond energies for all the bonds in the products – this is the ‘energy out’ Is cooking an egg […]

What are the properties of alloy? Alloy steels have a wide range of special properties, such as hardness, toughness, corrosion resistance, magnetizability, and ductility. Nonferrous alloys, mainly copper–nickel, bronze, and aluminum alloys, are much used in coinage. What are advantages of alloys? Enhance tensile strength: Alloy formation increases the tensile strength of the parent metal. […]