Thanks to the AWESOME POWER of logarithmic scales a slide rule gives you several computational features using your very own virtual, mechanical computer. With this slide rule, you can: multiply and divide, multiply chains of numbers, find reciprocals, determine squares / square roots / cubes / cube roots, base-10 logarithms, and sines / cosines / tangents / cotangents.
Contains support for both phone and tablet devices. Provides ANIMATED built-in help for maximizing your slide rule usage.
This app will definitely help establish your nerd-cred.
Slide rule - a device designed to simplify and speed up work with logarithmic tables. Using a slide rule greatly simplifies operations of multiplication, division, exponentiation, root extraction and calculation of trigonometric and logarithmic functions. Different types of slide rules were widely used until the early eighties.
The slide rule reproduces HEMMI No. 30 slide rule, which has A, B, C, CI, D, S, L, T scales.
This device calculate multiplication, division, exponentiation, root extraction and calculation of trigonometric and logarithmic functions using logarithmic scales.
Today planes rely on very different technologies but the rule is still useful whenever you want to do operations without having to type. Just line up the two numbers to get quickly tabs on all their multiples.
Very useful for travel, just set the exchange rate, for example, if 1 U.S. Dollar is worth 0.75 Euros, how many U.S. Dollars costs a 40 Euros backpack? Just look at the Ruler to see it costs about 53 U.S. Dollars, without doing math!
Join the Google+ Community Android Development https://plus.google.com/communities/105153134372062985968 and opt-in https://play.google.com/apps/testing/it.slug.circularsliderule to test new betas!
1) At the Top: conversion of circular duct diameters (mm) Ø into rectangular duct sizes and vice versa.
2) In the Middle: graphic form of Q (m3/h) = V (m/s) · S (m2) · 3600 formula, on the basis of the circular diameter Ø of the duct instead of the S section, in addition to the dynamic pressure calculation.
3) At the Bottom: determination of pressure drop in circular ducts depending on the velocity of the airflow. Using the duct calculator:
1. TOP section: Conversion of circular duct diameter Ø into equivalent rectangular ducts (and vice versa).
1.1 Position the upper cursor on the diameter. Position the duct height cursor on the maximum height value allowable for the desired duct. The b cursor will mark the side of the rectangular duct. It is advisable to limit the maximum ratio between b and a to 4: 1.
1.2 Conversion of rectangular ducts into circular ducts.
Position the cursor on the height of the a duct. Position b on the rectangular side (the numbering moves, not the cursor) and read the corresponding circular diameter Ø on the upper scale.
2. MIDDLE: Determining a third variable, knowing two of them (Q = V · S · 3600)
Knowing the diameter Ø and the air velocity, S and setting a diameter, when moving the velocity cursor, the
corresponding airflow, Q is obtained.
Knowing the diameter and the airflow, it is possible locking the diameter with the help of the lock. Then, we can set the airflow and we will obtain the air velocity, S. Knowing the airflow and the air velocity, S, we can set the desired airflow. Then, placing the velocity cursor on the desired value, we will obtain the corresponding diameter Ø.
2.2 Determining the dynamic pressure.
Position the velocity cursor. Read the dynamic pressure on the bottom scale.
3. BOTTOM: Pressure drop calculation.
Position the cursor on the corresponding diameter. Position the cursor on the velocity of the airflow through the duct. Read the pressure drop per unit length value PCL in the rectangle on the bottom right-hand side. Multiply the obtained value by the total equivalent duct length of the installation to calculate the system pressure drop when installed.
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Learn more about the highly efficient circulators Calio (S) here: www.ksb.com/calio
And now through this emulator for the HP-35, where both perfectly emulates the LED screen of the original 15-digit calculator physically and how we can make use of it in a virtual like you're actually physically in our hands through our Android device.
The HP-35 calculated arithmetic functions, logarithmic and trigonometric functions.
Some historical curiosities of this calculator are:
- The display of 15 characters in the HP 35, when the reverse was seen, could produce a limited number of alphabetic messages. For example, 710.77345 would read as "SHELL OIL". The sample was probably more extravagant +40 57738.57734 E would be read as "Oh Hells Bells".
- The HP 35 was just 5.8 inches long and 3.2 inches wide. This was the pocket size of William Hewlett, of there as the "pocket calculator".
- The power requirement of the LED display was responsible for the short life between battery charges the HP 35, about three hours. To prolong the operating time and prevent damage from overuse of the slide switch on / off, users could press the decimal point key to force the display to illuminate only a segment of the LED.
- The HP 35 calculated arithmetic functions, logarithmic, and trigonometric, however, full implementation used only 767 carefully chosen instructions (7670 bits), in what is a marvel of concise programming.
- The introduction of the HP 35 scientific calculators and other similar capacity by Texas Instruments soon signaled the end of the slide rule as a status symbol among science and engineering students. The covers of the rules of calculations were disappearing to make way for the covers of the "electronic slide rule", and universities began to abandon the slide rule classes of their curriculum.
- The HP 35 was the beginning of a family of related calculators all sharing similar mechanical packaging:
- The screen was unique in the sense that multiplexing is designed to illuminate only one LED at a time segment, instead of a single-digit LED, because HP investigations had shown that this method was perceived by the human eye as more Bright energy equivalent.
- The calculator used three NiCd batteries "AA" assembled in a removable battery pack, owner of HP design. Battery packs and replacement are unavailable, leaving 35 HP depending existing alternating current, or the users must rebuild the battery pack using batteries themselves available. An external battery charger was available and could also function calculator from charger, with or without batteries installed.
Internally, the calculator was organized around a serial processor chipset (a bit) floating point number processing 56-bit, 14-digit numbers representing BCD.
It was introduced at a price of U.S. $ 395.1 and was available from January 4, 1972 to 1975. During that time over 300,000 units sold.
Before the HP 35, the only practical portable devices to perform trigonometric and exponential functions were slide rules. At that time, existing pocket calculators had only four functions, ie could only add, subtract, multiply and divide. Originally it had been known simply as "The Calculator", but Hewlett suggested that it should be called the HP 35 because it had 35 keys.
HP 35 was developed in two years, HP 35 was released in 1972.
Navigation Navigator is here for those, who miss original Navigator icon for easy navigation. So we made this useful Navigator app to help Navigation and Maps community.
This Navigator app simply opens Navigation in one click.
Any issues regarding location, Maps crashing or internet use do not have anything to do with this app.
There comes a time in everyone's life when you have to solve a logarithm. We know, it can be an unpleasant experience. You just want to get an answer as quickly as possible and move on with your life. Well then, this is the app for you! We've gone out of our way to make this as easy as possible to use. Just input a numerical base, a numerical value, and we'll do the rest. We've also included shortcuts for natural and binary logs to make life even easier for you.
If you find a bug, or just don't like something about this app, feel free to tell us on our website or send us an email about it. As soon as we know, we'll do our best to change it. Remember, we can't fix a problem if we don't know it exists.
This app also includes descriptive charts for both Otis Quick Unions and Bowen Quick Unions.
Nexus Engineering & Machine Inc specializes in the design, manufacturing, sales, rental and service of Coiled Tubing Pressure Control Equipment and related products.
If you have any questions, comments or suggestions, please contact us, we will be happy to help you and improve our product.
Enter or get calculated the required maximum volumetric flow, select other features such as type of connection, PN class or DN size – and the ideal type of combi valve will be displayed. The matching type of actuator is just as easy to find. Also, all data sheets are provided.
Now, the right motorized valve is at your disposal, but you would like to know the presetting you need to ensure the required volumetric flow. The Combi Valve Sizer does this job for you as well.
This also works in the reverse sense, if you would like to find the maximum volumetric flow resulting from a certain presetting.
Siemens combi valves combine in one valve body a control valve, a differential pressure controller to shields against pressure fluctuations in the hydraulic network, and a presetting scale to set the desired maximum volumetric flow. If required, the valves can be supplied with pressure measuring points to acquire the differential pressure across the valve. The Combi Valve Sizer app from Siemens helps you design and implement HVAC plants that employ these smart, multifunctional and pressure-independent valves.
- Turn based game
- First person control
- Fantasy world
- A unique hero
- Over 15 hours of gameplay
- Beautiful music
- Customizable characters
- 6 character classes
- Unique Skills for each class
- Comprehensive inventory system
- Different enemies
- Save game in any time