Category: Physics

What are three primary methods of monitoring volcanic activity? Volcanologists use many different kinds of tools including instruments that detect and record earthquakes (seismometers and seimographs), instruments that measure ground deformation (EDM, Leveling, GPS, tilt), instruments that detect and measure volcanic gases (COSPEC), instruments that determine how much lava is … How can we detect […]

What material expands the most when heated? By contrast, iron, with a coefficient of 1.2, is 24 times more likely to expand or contract as a result of changes in temperature. (Steel has the same value as iron.) The coefficient for aluminum is 2.4, twice that of iron or steel. Which state of matter contracts […]

What force is used to lift a weight? gravity Is there work done when lifting weights? As you are lifting the object you are doing work on the object. The work W done on an object by a constant force is defined as W = F·d. It is equal to the magnitude of the force, […]

What is photosynthesis answer in one line? Photosynthesis is the process by which plants and some microorganisms make substances like carbohydrates. It is an endothermic (takes in heat) chemical process that uses sunlight to turn carbon dioxide into sugars. The sugars are used by the cell as energy, and to build other kinds of molecules. […]

What type of object a chair a painting and a shoe are? Objects like a chair, a painting, or a shoe do not have their own light. We see these when light from a luminous object (like the Sun, a torch, or an electric light) falls on these and then travels towards our eye. Why […]

Why does temperature pressure and density decrease with altitude? Altitude is height above sea level. The density of air decreases with height. There are two reasons: at higher altitudes, there is less air pushing down from above, and gravity is weaker farther from Earth’s center. So at higher altitudes, air molecules can spread out more, […]

What are the factors affecting the height of the waves? Wave height is affected by wind speed, wind duration (or how long the wind blows), and fetch, which is the distance over water that the wind blows in a single direction. If wind speed is slow, only small waves result, regardless of wind duration or […]

Is pitch and note the same? Pitch is the high or low frequency of a sound. When you sing, you create pitch because your vocal cords vibrate at a certain speed. Notes are musical symbols that indicate the location of a pitch. Tone is the color or timbre of pitch. Can a sound have no […]

What are five ways to make an observation? Explain that an observation is information we gather about something by using our senses. List the five senses of sight, hearing, taste, touch, and smell. Use their senses to make observations about things in the classroom. What are the direct observation methods? Observations can also be either […]

Is Bangladesh in Pakistan or India? Pakistan and Bangladesh are two separate and independent countries physically divided by India. Historically, this was not always the case: from 1947 to 1971 they were administered under the same government. The two countries share a number of attributes. How are rivers important to the peoples of Pakistan and […]