Category: Physics

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 […]

Why is it possible to use physical properties to separate a mixture? The substances in a mixture are separated by the differences in their physical properties, such as their particle size. The more different the properties are, the easier it is to separate the substances. What are three physical properties used to separate mixtures? Physical […]

What is an example of a cultural control of pests? 4 Cultural Control. Cultural pest control refers to the manipulation of the crop production system or cultural practices to reduce or eliminate pest populations. Practices such as adjusted planting dates and crop rotations have long been recognized at the local or farm level to avoid […]

How do you cover a fruit tree with netting? When you install netting, you have two options. You can make a frame to hold the netting away from the branches or you can drape the net directly over the tree. Using a frame keeps birds from pecking at fruit on the outside of the tree […]

What is the correct pathway for vision? The visual pathway consists of the retina, optic nerves, optic chiasm, optic tracts, lateral geniculate bodies, optic radiations, and visual cortex. The pathway is, effectively, part of the central nervous system because the retinae have their embryological origins in extensions of the diencephalon. Which controls the amount of […]