Physics

A light year measures the distance that light travels in one year, which is about 5.88 trillion miles or 9.46 trillion kilometers.

In linguistics or phonetics, a line over a letter signifies that the sound represented by that letter is pronounced with a higher pitch or tone.

A linear accelerator is a machine that uses high-energy radiation to treat cancer by targeting and destroying cancer cells. It works by delivering precise beams of radiation to the tumor while minimizing damage to surrounding healthy tissue. This helps to shrink or eliminate the tumor and stop the growth of cancer cells.

A longitudinal waves diagram illustrates how waves move in a back-and-forth motion, parallel to the direction of the wave's energy transfer.

A magnet is an object that produces a magnetic field, which can attract certain materials like iron and steel. This attraction occurs because the magnetic field of the magnet interacts with the magnetic properties of the object, causing them to be pulled towards the magnet.

A changing magnetic field induces an electric current in a conductor.

A circular motion force diagram illustrates the forces acting on an object moving in a circular path, showing the centripetal force required to keep the object moving in a curved trajectory.

A compression wave diagram illustrates how energy is transmitted through a medium by showing areas of high and low pressure as the wave moves through.

A constant negative velocity graph represents that the object is moving in the negative direction at a steady speed.

A convex lens bends light rays inward, causing them to converge at a focal point. This refraction creates a real or virtual image depending on the object's distance from the lens.

A distance vs time graph for an object experiencing constant acceleration would be a straight line that curves upward, showing a steady increase in distance over time.

A floater in your eye looks like a small, dark speck or thread that moves around when you try to focus on it. It is caused by tiny bits of debris floating in the vitreous gel inside your eye. Floaters can cast shadows on your retina, causing blurry spots in your vision. They can be annoying but are usually harmless.

A free body diagram of a pulley system illustrates the forces acting on the pulley and the objects connected to it, showing the direction and magnitude of each force.

A gibbous moon appears as a large, round shape in the night sky, with more than half of its surface illuminated by the sun.

A battery positive and negative diagram illustrates the flow of electric current within a circuit, showing the direction in which electrons move from the negative terminal to the positive terminal.

A battery terminal diagram illustrates the connections and polarity of the positive and negative terminals on a battery, showing how they are connected to the electrical system of a vehicle or device.

A black hole has an extremely strong gravitational pull that can trap nearby matter and light, preventing them from escaping. This creates a region of space where nothing can escape, not even light, which is why it appears black.

A bubble wand is a tool used to blow soap bubbles. By dipping the wand into a soap solution and blowing through it, you can create bubbles of various sizes and shapes. The wand's design helps to create a thin film of soap that traps air and forms the bubble. By waving the wand gently through the air, you can create a magical display of floating bubbles that can bring joy and entertainment to people of all ages.

A capacitor charge graph shows how the voltage across a capacitor changes over time when it is connected in an electrical circuit. It illustrates that initially, the voltage across the capacitor rises quickly as it charges up, but eventually levels off as the capacitor becomes fully charged. This graph helps to understand the time it takes for a capacitor to charge and how it behaves in a circuit.

A cathode in a circuit is a terminal where electrons flow out of the device. It is the negative electrode and is responsible for attracting positively charged ions.

A centrifuge spins blood at high speeds, causing its components to separate based on their density. Heavier components like red blood cells move to the bottom, while lighter components like plasma rise to the top. This process allows for easy extraction of specific blood components for medical purposes.

A centripetal acceleration diagram illustrates the acceleration of an object moving in a circular path towards the center of the circle.

A centripetal force free body diagram illustrates the forces acting on an object moving in a circular path, showing the inward force required to keep the object moving in a curved trajectory.

AC stands for Alternating Current in terms of electricity.

Gauss's law for magnetism states that magnetic monopoles do not exist. This means that magnetic poles always come in pairs, with a north pole and a south pole together.