Category: Physics

What are two unique features of the stratosphere? The stratosphere is very dry; air there contains little water vapor. Because of this, few clouds are found in this layer; almost all clouds occur in the lower, more humid troposphere. Polar stratospheric clouds (PSCs) are the exception. PSCs appear in the lower stratosphere near the poles […]

Is Y =- 5 a linear equation? No. All linear functions can be written in the form y = mx + b, where m is the slope and b is the y-intercept (slope-intercept form). This function, y = 5/x, is a hyperbola, with a vertical asymptote at x = 0 and horizontal asymptote at y […]

How is 2 2×4 equal 10? Apparently 2+2×4=10 because you always x before + This is news to me. The way I was taught, sums are read left to right unless ( ) tell you to do that bit first. So for 10 the sum should be 2+(2×4)=10 Otherwise 2+2=4 then 4×4=16 Have I been […]

What are the key concepts in the evolution theory of Darwin? Branching descent and natural selection are the two key concepts of Darwinian Theory of Evolution. Why was Lamarck’s theory wrong quizlet? LaMarck’s theory was incorrect because he did not know how traits were inherited & that the organism’ behavior has no effect on inherited […]

What are the three types of nuclear change? Nuclear Reactions Fission. Fusion. Nuclear Decay. Transmutation. What is a nuclear reaction example? An important example of nuclear fission is the splitting of the uranium-235 nucleus when it is bombarded with neutrons. Various products can be formed from this nuclear reaction, as described in the equations below. […]

What is the overall charge of MgCl? +2 Why Magnesium chloride has no overall charge? Overall, the compound has no charge, because the positive sodiums balance out the charge on the negative chlorides, and vice versa. Magnesium oxide forms in a ratio so that the positive charges on the magnesium balance the negative charges on […]

What are 2 dimensional impressions? 2-D impressions will be any impression that only has length and width measurements. 2-D footwear impressions are typically found indoors and are associated with objects touched at the crime scene. This can include any object or surface in the crime scene. Are shoe impressions Class evidence? No they are not […]

When light is incident on a soap film of thickness 5? When light is incident on a soap film of thickness 5 x 10-5 cm, wavelength which is maximum reflected in the visible region is 5320A. Why do we see Colours in a soap bubble? Why are soap bubbles so colorful? The colors of a […]

Is a 3 year degree worth anything? It’s true that three-year degrees, even if accelerated, would likely never be academically equivalent to four years. But three-year degrees would offer students a much-needed fork in the road. If more students moved to a college after year three, more would be working within four years of high […]

Are eigenvectors Orthonormal? 1) Eigenvectors can always be scaled. So if v is an eigenvector then so is av for a∈k∗. So if each eigenvalue has multiplicity one a basis of eigenvectors is automatically orthogonal (and can be made orthonormal as above). In general we need to find an orthogonal basis of each eigenspace first, […]