Category: Physics

Why is iron magnetic and wood is not? The spinning of the charged electron creates a magnetic moment, which in turn can align with an external magnet, thus making iron magnetic. Atoms of wood do not have unpaired electron spins that can line up with a magnet, and so it is non-magnetic. Does Wood have […]

What is mean of virtual? being such in essence or effect What is the meaning of virtual test? A virtual exam or remote exam is an exam that a student takes from a location other than the physical classroom or any physical exam center. In a virtual exam, the student is not supervised at a […]

How do you convert density? For example, to convert from lb/ft3 to g/mL you would multiply by 16.018463 then divide by 1000. Or, multiply by 16.018463/1000 = 0.016018463. So, to convert directly from lb/ft3 to g/mL you multiply by 0.016018463. To understand how to also convert the units follow this example. What is the density […]

Is Deneb truly distant? Deneb is not truly distant – dot A is closest to representing is location relative to the Sun, and it is barely a separate dot from the Sun. Deneb is only 1.4% of the diameter of the Milky Way distant from the Sun! Is the halo of the Milky Way larger […]

What is the best method of decontamination? Autoclaving Which type of nerve agent is the most persistent? VX is the most potent of all nerve agents. Compared with the nerve agent sarin (also known as GB), VX is considered to be much more toxic by entry through the skin and somewhat more toxic by inhalation. […]

Which one of the following is solid at room temperature? Oxygen and nitrogen are gases, bromine is liquid at room temperature. So KMnO4​ is solid at room temperature. Which fast is most likely a solid at room temperature? Saturated fats Why is butter solid at room temperature? Saturated fats are solid at room temperature due […]

Are ants on a tree bad? To protect their homes, the ants patrol the area around the tree, killing insects that want to eat the plant’s leaves and sometimes destroying vegetation of other plants that might compete for precious soil nutrients and sunlight. Why do ants go up trees? So why do ants climb trees? […]

What is the frequency of ultraviolet light? Ultraviolet (UV) light falls in the range of the EM spectrum between visible light and X-rays. It has frequencies of about 8 × 1014 to 3 × 1016 cycles per second, or hertz (Hz), and wavelengths of about 380 nanometers (1.5 × 10−5 inches) to about 10 nm […]

What month does the sun get higher in the sky? summer Are the days longer in summer? As the Earth circles the Sun during the year, half of the Earth get more or less sunlight than the other half of the Earth. In the summer months, the northern half of the Earth, where we live, […]

What does inverse mean? In mathematics, the word inverse refers to the opposite of another operation. Let us look at some examples to understand the meaning of inverse. Example 1: So, subtraction is the opposite of addition. Hence, addition and subtraction are opposite operations. Why is the inverse square law important? Inverse Square law: The […]