Category: Physics

Is 2 Fe O2 → Fe2O3 balanced? Fe + O2 → Fe2O3 is the unbalanced form of chemical reaction. Fe + 3O2→ Fe2O3 there are now 6 O atoms on the left, there must also be 6 O atoms on the right. Balance the rest of the equation. What type of reaction is Fe O […]

What is the correct order of the layers of earth from the surface to the center? They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core. What are the 7 smaller plates? You mention the Nazca plate as not being particularly “minor”, and […]

What is a good example of inertia? Law of Inertia Objects want to stay in rest or motion unless an outside force causes a change. For example, if you roll a ball, it will continue rolling unless friction or something else stops it by force. You can also think about the way that your body […]

Can a phone camera see infrared? And while our naked eyes can’t pick up on infrared light, the sensors in your phones and digital cameras can — essentially making the invisible visible. The cell phone camera is more sensitive to light than human eyes are, so it “sees” the infrared light that is invisible to […]

What is true of activation energy? Activation energy is the amount of energy required to allow a reaction to occur. This energy is often used in the breaking of bonds in order to force a reaction to occur. Activation energy is mathematically defined in Arrhenius’ equation. What is the physical significance of activation energy? The […]

What is a good turning radius? What is a typical turning circle for a passenger car? A turning radius of 34′-35′ | 10.4-10.7 m is common for passenger cars today. Which car has the shortest turning radius? Smart Fortwo Which truck has the best turning radius? Top Five: Tightest Turning Circle Double-Cab Pickup Trucks 4: […]

Which force is responsible for the elastic nature of a body? Restoring force What is the difference between deforming force and restoring force? If this results in change in the configuration of length, volume or shape of the body then the force applied is called as deforming force. The force which restores the size and […]

What happens when you remove heat from a solid? Adding heat can cause ice (a solid) to melt to form water (a liquid). Removing heat causes water (a liquid) to freeze to form ice (a solid). When water changes to a solid or a gas, we say it changes to a different state of matter. […]

What is an example of a force vector? You can add two or more force vectors that are at angles with respect to each other to create a new force vector. An example is if a force is moving an object in a given direction and wind applies a force on it at an angle, […]

What rock is sand? The most common component of sand is silicon dioxide in the form of quartz. The Earth’s landmasses are made up of rocks and minerals, including quartz, feldspar and mica. What is black sand made of? Black sand comes from eroded volcanic material such as lava, basalt rocks, and other dark-colored rocks […]