When consulting manuals, electricians, online sources, etc., they always instruct you to handle halogen light bulbs with gloves.

The "explanation" that usually accompanies this statement is that oils and salts from a bare hand can "react" with the surrounding glass/quartz, owing to the fact that halogen bulbs are much hotter than ordinary ones. These reactions would cause weak spots in the quartz (or in some versions of the story, the filament), decreasing the lifetime of the bulb.

Is there any merit to this explanation? What are then the precise mechanisms involved in the bulb's degradation when the bulb is touched by a dirty monkey finger?

What maximum output would you expect from a wind turbine with a blade of radius 15 ft in a 25 mph wind

A liquid has a density at 289K of 955kg/m^3. Its(volume) thermal expansion coefficient is 1.05E-3/K. What is its density at 316K? Answer 929 kg/m^3 I'd appreciate explanation ! Thank you :)

1. Although quantum information has been around for a long time, we are starting to see more about it in the media

A parallel-plate air-filled capacitor has a capacitance of 335 pF. If each of its plates has an area of 0.025 m², what is the separation? If the region between the plates is now filled with germanium, what is the capacitance?

Our sun will first become a red giant star when it leaves the Main Sequence, as it goes from core Hydrogen burning to shell Hydrogen burning. After it has exhausted all of the fusion reactions possible, perhaps some Helium fusion in there as well, it will leave a corpse called a White Dwarf, where there is a crystalline core of carbon and mixed ash products, surrounded by

1. By using the formula for the Electric Field, calculate Electric field of a solidnonconducting sphere with radius R, and charge Q distributed uniformly on the sphere, at any point a distance r from the center of the sphere for r > R and r < R.

2. By using the formula for the Electric Field, calculate Electric Field of a conductingsphere with radius R and charge Q distributed uniformly on the sphere, at any point a distance r from the center of the sphere for r > R and r < R.

How does specific heat affect the weather? Give three examples of weather phenomena that are affected by the specific heat of land, oceans and air

The resting surface charge density of a membrane is 0.5 uC/cm^2. The resting membrane potential is 0.5 V. It drops to 0 V in 5 ms. If there are 25 Na channels per um^2 that open up during depolarization, what is the average current that flows through a sodium channel during this time (5 ms)? How many sodium ions move through the channel in 5 ms?

Derive the formula for electron charge to mass ratio

e/m=2V/(Br)^2: first, explain why formulas

(mv^2)/r=evB and

eV=1/2mv^2 must hold. Then, do what algebra is necessary to show that those formulas imply formula e/m=2V/(Br)^2

1. An RLC series circuit has a 60 Ω resistor, a 3.5 mH inductor, and a 6 μF capacitor.
   1. Find the circuit’s impedance at 55 Hz and 12 kHz.
   2. If the voltage source has V_rms = 110 V, what is I_rms at each frequency?    

Two point charges are fixed on the y axis: a negative point charge q1 = -30 μC at y1 = +0.22 m and a positive point charge q2 at y2 = +0.37 m. A third point charge q = +9.8 μC is fixed at the origin. The net electrostatic force exerted on the charge q by the other two charges has a magnitude of 20 N and points in the +y direction. Determine the magnitude of q2.