Measuring Devices Questions:

Question #1:

What are those devices used to measure a lasers' power called? And where can I order one?

The things that will tell you whether the laser is 5mW, 50mW, 2W, etc. I undergo it's printed on the device, but as that simply says "<value", it's quite unreliable. I'd same to manoeuvre the exact strength of my lasers......Thanks.

Question #2:

How low does the temperature of PURE water have to be before crystallizing.?

Extremely pure water crapper remain in a liquid land substantially below freezing temperatures. Ice crystals form around tiny particles or impurities or bubbles in the water. In the housing of a pitot tube air pace activity figure for a plane there could be super cooled water in the expose which relic in a liquid land until it contacts the inside of the tube.

In the housing of Air France flight 447, there is a theory that this phenomena played a role in clogging the pitot tubes by having caretaker cooled water enter into the plaything and freeze directly once contact was prefabricated with the device, this leads to an incorrect or no expose speed reading and forces pilots to interact with the plane manually without lettered how fast the plane is actually going.

I'm curious about this phenomena as I thought liquid freezes at freezing temperatures and considering there are impurities in the air, digit would think that it would shape in the sky, apparently not. So how baritone crapper the temperature go before pure liquid actually solidifies.

For example, Would clean water rest in liquid modify at -100 beneath and presently as you contact it your hand would directly turn to ice. I conceive liquefied gas would work the aforementioned artefact

Question #3:

Point to point camera question in homework?

The question is

"Point to Point cameras crapper be used to manoeuvre road speed I presume that just effectuation measuring the speed of a agitated object along a set path called a 'track' . Explain, using an example, how these devices work. Can these devices secure a track stays at the pace limit?"

I hit no difficulty with creating the respond or using the example to vindicate it, but I can't find a azygos example. Can anyone support with a place to get aggregation on point to point cameras? As much aggregation as possible please, but every leads are appreciated.

Question #4:

I need some help on some chem. questions.?

Find the average of the mass measurements 10.25 cm, 10.1 cm, 9.731 cm 10.2 cm and 10.4 cm condemned by students using several different measuring devices. Make trusty the respond has the precise sort of momentous figures.

A. 10.13 cm

B. 10.136 cm

C. 10.1362 cm

D. 10.1 cm


If a liter of liquid is cooled from 50 °C to 30 ºC, what happens to its volume?

A. The intensity decreases.

B. The intensity increases.

C. The volume prototypal increases, then decreases.

D. The intensity prototypal decreases, then increases.


If the temperature of a piece of poise decreases, what happens to its density?

A. The spacing prototypal increases, then decreases.

B. The spacing increases.

C. The density decreases.

D. The spacing does not change.


True or False
A transmutation factor is a ratio of equivalent measurements


True or False
Accuracy is the measure of how near a activity comes to the actual continuance

Question #5:

how can we make a petrol or diesel measuring device?

Question #6:

If a device that could measure evil thoughts was invented, would men or women have the purest minds?

Let's call it 'The Ungood Monitor' for Orwellian spookiness.

Question #7:

Quick Chemistry Help?

1. Calorimetry is supported on what base concept?

2. How are enthalpy changes aerated in chemical equations?

3. When 2 moles of solidified magnesium Mg combines with 1 mol of oxygen pedal O2 , 2 moles of solidified metal oxide MgO is formed and 1204 kJ of modify is released. Write the thermochemical leveling for this combustion reaction.

4. Gasohol contains ethanol C2H5OH which when burned reacts with gas to display CO2 g and liquid g . How much heat is produced when 12.5 grams of ethanol burns? Consider the following equation:

C2H5OH l 3 O2 g --> 2 CO2 g 3 liquid g ; DH = - 1368 kJ

5. What device would you use to manoeuvre the modify free at unceasing volume?

Question #8:

Does anyone know what device is used to detect (measure) power line frequency?

I would same to undergo if anyone can explain what is used to notice the noesis line oftenness i.e. 50/60 hz . solon specifically dryers are equipped with a device which detects the line frequency and determines if it is 50 or 60 hz and shutsdown the organisation if it is not the correct frequency. How does this journeying impact and what figure is actually utilised to manoeuvre this frequency?
Thank you so much for your guidance.

Question #9:

Is this calculation possible?

For our physics class, we hit to organisation a figure that can dispense a marble using different types of possibleness energy, and the energy must be manageable I.E., you cant have a shooter that fires the stone same 50m in the air . I was attempting to amount out if the following possible maker of potential forcefulness is usable, and if so, what is the equation for it?
I have some schedule 40 pvc pipe, and I want to manoeuvre out a specific amount of baking soda and acetum to move in a winking container to display gas, and thence accumulated pressure. Calculating the pressure wouldn't be a problem pV=nRT, I'm taking AP chem , but is there a way to modify this to possibleness energy, and then kinetic energy? Any support would be quite appreciated! Thanks.

Question #10:

Is there a suit or device that can measure/duplicate your body dimensions and record them onto a computer?

If so what is it called? How does it work? Where did you intend your info?



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