Category: Physics

How does light act like a particle? Light behaves mainly like a wave but it can also be considered to consist of tiny packages of energy called photons. Photons carry a fixed amount of energy but have no mass. They also found that increasing the intensity of light increased the number of electrons ejected, but […]

How should you approach a dock when there is a strong wind blowing away from the dock? If the wind is offshore (blowing away from the dock), you should approach the dock at a 20 to 30 degree angle. A bow line is passed ashore and secured. In boats with an outboard, or inboard/outboard engine, […]

What is the lowest order of the Butterworth? What is the order N of the low pass Butterworth filter in terms of KP and KS? Explanation: We know that, [\frac{Ω_P}{Ω_C}]^{2N} = 10^{-K_P/10}-1 and [\frac{Ω_P}{Ω_C}]^{2N} = 10^{-K_S/10}-1. Which is better FIR or IIR? The advantage of IIR filters over FIR filters is that IIR filters usually […]

What is the chemical name of ch2? Methylene Why is CH2 called methylene? Methylene was used as the name for methanol, which is wood alcohol, CH3OH, in the early 19th century. Methylene comes from methe + hyde the latter being the Greek word for wood, so methylene would mean wine from wood. What is full […]

Why is it easier for humans to walk through air than liquid water? It is easier to push an object through air than through water. This is because air is less dense than water. Since air is less dense this means there is less matter, or less “stuff”, in a certain area of air than […]

Which WiFi frequency is best? Ideally, you should use the 2.4GHz band to connect devices for low bandwidth activities like browsing the Internet. On the other hand, 5GHz is the best suited for high-bandwidth devices or activities like gaming and streaming HDTV. What is the advantage of having WiFi in your car? Benefits of car […]

Is pigment ink better for heat transfers? So after going by all the characteristics and differences in the inks, it is advised to use Pigment ink for heat transfer paper. The reason for using a pigment ink over the regular dye ink is that the pigment ink doesn’t fade quickly. How do you make a […]

Why do wheels have friction? A wheel or ball on a surface is held there by static sliding friction. In order to start the rolling motion, a force or torque must be applied to the wheel. The force of the static sliding friction prevents the wheel from sliding and thus initiates the rolling motion. Is […]

Can aluminum be magnetized? In our everyday experience aluminum doesn’t stick to magnets (neither does copper). Most matter will exhibit some magnetic attraction when under high enough magnetic fields. But under normal circumstances aluminum isn’t visibly magnetic. Why is stainless steel jewelry so cheap? Stainless steel not only mimics the look of fine, precious metal, […]

What will the precipitin test tell a forensic scientist? Precipitin test identifies the presence of proteins that are found only in human blood. On the surface of red blood cells are molecules (proteins) called antigens. Antigens allow a living system to recognize foreign biological substances, such as infectious agents and allergens. What qualifications do you […]