Category: Physics

What is the formula of electric force? Calculate the electrostatic force using the formula: F = K[q1 x q2]/D^2 where K is coulombs constant, which is equal to 9 x 10^9 Nm^2/C^2. The unit for K is newtons square meters per square coulombs. What is an example of repulsive force? For example, the force between […]

Does black body actually exist? Although a blackbody does not really exist, we will consider the planets and stars (including the earth and the sun) as blackbodies. According to the above definition, a blackbody will emit radiation in all parts of the EM spectrum, but by intuition, we know that one will not radiate in […]

Why is only 10 of energy passed on? Calculating the efficiency of energy transfers The reason for this is that only around 10 per cent of the energy is passed on to the next trophic level. The rest of the energy passes out of the food chain in a number of ways: it is egested […]

Which is more stronger in bending equal area square or circular beam? Two beams of equal cross-sectional area are subjected to equal bending moment. If one beam has square cross-section and the other has circular section, then. Both beams will be equally strong. Circular section beam will be stronger. What is the strongest cross section […]

How does environment affect natural selection? Explanation: In a population, the natural selection will favour the individuals with the higher fitness (In other words : the ones which have the best chances to survive and reproduce) in a given environment. It means that, for different environment, one gene can give different trait values at the […]

How do plants absorb photons of light energy? When a plant is exposed to light, photons of appropriate wavelength will strike and be absorbed by the pigment-protein complexes arrayed on the thylakoid membranes. When this happens, the energy of the photon is transferred to the pigment molecule, thus causing the pigment to go into an […]

What are the key deliverables in any project? What are the key deliverables of the project management process? Kick-off meeting* Project Repository* Project Charter (high-level objectives and key stakeholders)* Project Charter Approval* What are examples of deliverables? Some examples of process deliverables are: Statement of work. Work breakdown structure. Project scope statement. Project governance plan. […]

Why is Aluminium foil a bad insulator? Aluminium foil is a great conductor of heat, which means it is a poor insulator when it is in direct contact with something hot. It is also so thin that heat can pass through it super easily when it has direct contact. This is they type of heat […]

What are two examples of a stimulus and reaction? Examples of stimuli and their responses: You are hungry so you eat some food. A rabbit gets scared so it runs away. You are cold so you put on a jacket. How do roots respond to gravity What is the mechanism of this response? In plants, […]

Does critical angle depend on? (a) The critical angle of a medium depends upon the refractive index, wavelength of light and the temperature of the medium. Does critical angle depend on frequency? Yes, it depends. Does critical angle depend on wavelength used? Critical angle depends on the refractive index of a material, which in turn […]