Physics

A steel ship floats because of the principle of buoyancy. The weight of the water displaced by the ship is equal to the weight of the ship itself, allowing it to stay afloat.

When you turn off the wall switch, it breaks the circuit that allows electricity to flow to the light bulb, causing the light to go out.

A magnet falls slower in a copper pipe because the magnetic field generated by the moving magnet induces an electric current in the copper pipe, creating a magnetic field that opposes the magnet's motion, causing resistance and slowing it down.

A magnet slows down when moving through a copper tube because the magnetic field generated by the moving magnet induces electric currents in the copper tube, creating an opposing magnetic field that resists the motion of the magnet. This resistance, known as electromagnetic induction, causes the magnet to slow down as it moves through the tube.

A metal chair becomes too hot to sit on when left in direct sunlight because metal is a good conductor of heat. When the chair is exposed to sunlight, it absorbs the heat and quickly conducts it throughout the entire chair, making it hot to the touch. This phenomenon occurs because metal has a high thermal conductivity, meaning it can transfer heat efficiently.

A moving object eventually comes to a stop on a frictional surface because the friction between the object and the surface creates a force that opposes the object's motion, gradually slowing it down until it stops.

A nearsighted person wears glasses to correct their vision because the lenses in the glasses help to focus light properly onto the retina at the back of the eye, allowing the person to see distant objects more clearly.

When a car driver suddenly makes a sharp turn, the passenger slides to the side of the car due to inertia. Inertia is the tendency of an object to resist changes in its motion, so when the car turns quickly, the passenger's body wants to keep moving in a straight line, causing them to slide to the side of the car.

When the temperature changes, the air inside and outside the glasses have different levels of moisture. This causes condensation to form on the lenses, creating fog.

When connecting the positive terminal of a car battery, a spark may occur due to the sudden flow of electricity between the battery and the terminal. This spark is caused by the electrical resistance at the connection point, which generates heat and ignites any flammable gases present near the battery.

A car skids when braking suddenly because the tires lose traction with the road surface, causing them to slide instead of grip. This can happen due to factors like excessive speed, worn tires, or wet road conditions.

A car slides when braking because the friction between the tires and the road decreases, causing the tires to lose grip and skid. This can happen if the brakes are applied too forcefully or if the road surface is slippery.

When a spring is compressed, it stores potential energy in the form of elastic potential energy. This added energy increases the overall mass of the spring, making it weigh more than when it is uncompressed.

A computer gets hot because of the heat generated by its internal components when they are in use. This heat is produced as a byproduct of the electrical energy being converted into the processing power needed to run programs and perform tasks. The computer's cooling system helps to dissipate this heat and prevent damage to the components.

A door opens more slowly when pushed closer to the hinges because the force applied is farther away from the pivot point, making it harder to overcome the resistance of the hinges.

A full moon appears white to us on Earth because the sunlight reflecting off the moon's surface is a combination of different colors, which our eyes perceive as white.

A hard boiled egg floats because the air pocket inside the egg expands as it cooks, making it less dense than water. This causes the egg to float instead of sink.

A ball rolls down a hill due to the force of gravity pulling it downward. Gravity is a natural force that attracts objects towards each other, causing the ball to move in the direction of the slope.

A ball rolled along a horizontal surface maintains a constant speed because there is no external force acting on it to change its velocity. The absence of friction and air resistance allows the ball to continue moving at a steady pace.

A banana looks yellow because of the presence of natural pigments called carotenoids, specifically beta-carotene. When bananas ripen, the chlorophyll in the fruit breaks down, revealing the yellow color of the carotenoids.

When connecting the negative terminal of a battery, a spark may occur due to the sudden flow of electrons from the negative terminal to the positive terminal, creating a brief electrical discharge.

When connecting the positive terminal of a battery, a spark may occur due to the sudden flow of electricity between the battery and the connected device. This spark is caused by the initial surge of current as the circuit is completed, creating a brief moment of high electrical resistance that produces a visible spark.

A black object gets warm when visible light shines on it because the object absorbs the light energy instead of reflecting it. This absorbed energy causes the object's molecules to vibrate and generate heat.

A blanket keeps you warm by trapping and retaining your body heat, creating a layer of insulation that helps to maintain your body temperature.

A blue object appears black when illuminated with light because it absorbs most of the light that hits it, including the blue light that gives it its color. This absorption of light prevents the object from reflecting enough light to appear blue, making it appear black instead.