Category: Physics

How are sols classified? Sols are classified on the basis of size of solid particles present in it. Explanation: When solid particles that are very small in size are present in a continuous liquid medium then the solution formed is known as sol. For example, blood, cell fluid, milk of magnesia etc are all sols. […]

What is the relationship between length and period? The longer the length of string, the farther the pendulum falls; and therefore, the longer the period, or back and forth swing of the pendulum. The greater the amplitude, or angle, the farther the pendulum falls; and therefore, the longer the period.) Is period directly proportional to […]

How do you calculate the radius of an arc? Measure the length of the chord and the length of the bisecting line segment from the chord to the top of the arc. Enter the values into the formula (h/2) + (w^2/8h), where h is the arc height and w is the length of the chord. […]

Why can a horse not pull a cart and run in empty space? Answer: (a) For pulling a cart or for running, the horse pushes the earth with its feet and reaction of the earth makes it move in the forward direction. Since in empty space there is no reaction force, therefore the horse cannot […]

Why does air pressure increase after a cold front passes? If the air is moist and unstable enough, rain and thunderstorms can accompany the passage of the front. Air pressure usually falls as a cold front approaches, rising rapidly after passage as the dense cold air moves in. The dew point falls indicating the change […]

What does the inverse square law state? Inverse Square law: The radiation Intensity is inversely proportional to the square of the distance. Notice in the diagram that as the distance doubles, the area quadruples and thus, the initial radiation amount is spread over that entire area and is therefore reduced, proportionately. What is a inverse […]

What made the 5 Good Emperors good? Nerva’s reign began the Nervan-Antonine Dynasty, which included what history calls the Five Good Emperors. In order of their reign, they were Nerva, Trajan, Hadrian, Antoninus Pius, and Marcus Aurelius. First, the Five Good Emperors brought relative peace, stability, and prosperity to Rome. Who is the best emperor […]

Is water more dense than wood? Wood, cork, and ice float in water because they are less dense than water. It floats because it weighs less than amount of water it would have to push out of the glass if it sank. Wood, cork, and ice are all less dense than water, and they float; […]

Why does the temperature of a substance not change when the phase changes? But there is no temperature change until a phase change is complete. i.e. during phase change, the energy supplied is used only to separate the molecules ; no part of it is used to increase the kinetic energy of the molecules. So […]

What are 4 types of chemical reactions? Representation of four basic chemical reactions types: synthesis, decomposition, single replacement and double replacement. How many type of chemical reaction are there? five What is chemical reaction explain with an example? A chemical reaction happens when one or more chemicals are changed into one or more other chemicals. […]