Category: Physics

How can you say one substance is different from other? Different substances have different properties; density is one property that can be used to tell two substances apart. Density is a property that does not depend on the shape or size of an object. What is formed when two or more substances are combined? Two […]

What is the effect of watering plant on their growth height? Water helps a plant by transporting important nutrients through the plant. Nutrients are drawn from the soil and used by the plant. Without enough water in the cells, the plants droop, so water helps a plant to stand. Water carries the dissolved sugar and […]

How are humans affected by climate change? Human health is vulnerable to climate change. The changing environment is expected to cause more heat stress, an increase in waterborne diseases, poor air quality, and diseases transmitted by insects and rodents. Extreme weather events can compound many of these health threats. How many people are affected by […]

Which object is a natural source of light? the Sun What happens to light after it hits a mirror? Reflection occurs when light bounces off of Reflection occurs when light bounces off of a surface. When you look in a mirror, you can see your image because when parallel light rays hit the mirror at […]

How do you know if a rock is metamorphic? Metamorphic rocks are rocks that have become changed by intense heat or pressure while forming. One way to tell if a rock sample is metamorphic is to see if the crystals within it are arranged in bands. Examples of metamorphic rocks are marble, schist, gneiss, and […]

Is sulfur a stable shell? The valence shell (the 3s and 3p sublevels) contains six electrons, but it needs eight to become stable. Think of the octet rule. Therefore a sulfur atom will gain two electrons to form the sulfide anion with a charge of 2− , with the symbol S2− . Why does sulfur […]

Can you look over your shoulder when parallel parking? In general, you will use parallel parking next to a curb in the space between two parked cars. Look over your shoulder and back slowly as you turn your wheel toward the curb. Back up slowly so that the front of the vehicle is even with […]

Are AirPods bad for your brain? Takeaway. At this time, there’s no evidence that using Apple AirPods or other wireless headphones increases your risk of brain cancer. Bluetooth earbuds produce less radiation than cellphones. What happens if you wear headphones all the time? Turning the volume up and listening for long periods of time can […]

How do people survive in the car in the winter? How to Survive a Winter Night in Your Car Know the Risk. In general, it’s best to stay off the road when severe winter weather is predicted. Be Prepared. If You Become Stranded in your Car. Call for Help. Stay in Your Vehicle. Make Your […]

What do u mean by dielectric? Dielectric, insulating material or a very poor conductor of electric current. When dielectrics are placed in an electric field, practically no current flows in them because, unlike metals, they have no loosely bound, or free, electrons that may drift through the material. What is the purpose of dielectric testing? […]