Category: Physics

What is the increase in temperature that will double the rate of reaction? It has been observed experimentally that a rise of 10 °C in temperature usually doubles or triples the speed of a reaction between molecules. The minimum energy needed for a reaction to proceed, known as the activation energy, stays the same with […]

How is parallax distance calculated? Parallax Formula: p = parallax angle in arcseconds. d = distance in “Parsecs” Writing our parallax formula in this way allows us to define a new “natural” unit for distances in astronomy: the Parallax-Second or Parsec. What is the purpose of parallax error? It is an error caused by people […]

Why is it important to study the stars? Why we study stars. Once we look beyond the solar system, most of what we can learn about the Universe is based on observing stars. Not only do they light up the sky, they produce the raw materials that make life possible, and if there is life […]

What is called metal and nonmetal? Elements can be divided into metals and nonmetals and it is important to know whether a particular element is a metal or nonmetal. Metals (like copper and aluminium) are good conductors of heat and electricity, while nonmetals (such as phosphorus and sulfur) are insulators. What is difference between metal […]

How do you measure a wedge angle? The wedge angle of the plate can be determined from the inclining angle of the regression plane of the measured wavefront surface after the plate was inserted between the light source and the wavefront sensor. What is wedge friction? Friction- Part 2: A wedge is in general a […]

What is kinematics give three examples? The examples for kinematics are given below: i) Moving train and bus. ii) Motion of a mass on inclined plane. iii) Running water in the river. iv) Falling water from a mountain peak. What are the types of kinematics? There are three basic concepts in kinematics – speed, velocity […]

Are alkyl halides acidic or basic? Terminal alkynes and acetylene are mildly acidic. The haloalkanes or alkyl halides are a group of chemical compounds, derived from alkanes containing one or more halogens. They are a subset of the general class of halocarbons although the distinction is not often made. Is Cl or Br a better […]

What if petrol is used in diesel engine? Putting petrol in a diesel car can cause serious damage to the fuel injection system and the engine. Serious engine damage may also occur due to detonation caused by uncontrolled petrol ignition under the much higher compression ratio in diesel engines. How much pressure does it take […]

What is an example of atmosphere? Atmosphere is defined as the area of air and gas enveloping objects in space, like stars and planets, or the air around any location. An example of atmosphere is the ozone and other layers which make up the Earth’s sky as we see it. An example of atmosphere is […]

What two factors determine wave speed? Waves travel through a medium: A medium is any substance or region through which a wave is transmitted. The speed of a wave is dependant on four factors: wavelength, frequency, medium, and temperature. Wave speed is calculated by multiplying the wavelength times the frequency (speed = l * f). […]