Category: Physics

What is Pyroclast and lapilli? LAPILLI — Pea- to walnut-size pyroclasts (2 to 64 mm). They often look like cinders. In water-rich eruptions, the accretion of wet ash may form rounded spheres known as accretionary lapilli (left). What is tephra ash? Falling volcanic ash can disrupt lives distant from an erupting volcano. The term tephra […]

Why do sunspots move? As the sunspots are a result of magnetic processes in the Sun, they move in the direction of its magnetic field lines. As shown in Figure 9 the Sun’s magnetic field lines are extended parallel to the Page 14 equator and become twisted. Therefore, sunspots move mainly parallel to the equator. […]

Can you make your own electromagnet? Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail. In some cases, the nail will remain magnetised even when removed from within the wire coil. What […]

Which is more subjective sound intensity or loudness? The intensity varies as the square of the wave’s amplitude. Thus, the greater the difference between the regions of compression and rarefraction of the sound wave, the higher is its intensity. intensity is closely related to the more subjective word loudness, which refers to how the sound […]

Does the weight of an object depend on its mass? An object’s weight depends on its mass (the amount of matter it consists of) and the strength of the gravitational pull. Is Speed affected by mass? Mass doesn’t affect speed directly. It determines how quickly an object can change speed (accelerate) under the action of […]

Is higher GPM better? The higher the GPM the faster it will be to clean large surfaces. Is 2.5 gpm enough for pressure washer? Most electric pressure washers create 1300-1700 pounds per square inch of pressure (PSI) with a water flow of 1.5 gallons per minute (GPM), but experienced contractors recommend between 2000 and 3000 […]

Who came up with the law of conservation of mass? Antoine Lavoisier’s Where is the law of conservation of mass used in the real world? The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and […]

Does the base count as a face? Every solid figure, with the exception of a sphere, has one or more faces, or flat surfaces. Let’s look at an example. The figure above has a face on the bottom, called the base, and another on the top. It has four faces around the sides. Which Cannot […]

What is the meniscus of water in a test tube? A meniscus is what happens when you put a liquid into a container. When you put water in a beaker or test tube, you see a curved surface. With most liquids, the attractive force between the liquid and the container is greater than the attraction […]

What happens if the magnitude of one charge is doubled? If the magnitude of one charge is doubled then the magnitude of the force is also doubled. The force is not proportional to the square of the charge, so the magnitude of the force will not change by a factor of four. How does the […]