What is increase: Definition and 865 Discussions

In Demography, the rate of natural increase (RNI), also known as natural population change, is defined as the birth rate minus the death rate of a particular population, over a particular time period. It is typically expressed either as a number per 1,000 individuals in the population or as a percentage. RNI can be either positive or negative. It contrasts to total population change by ignoring net migration.
This RNI gives demographers an insight into how a region's population is evolving, and these analyses can inform government attempts to shape RNI.

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  1. A

    Pressure increase in room connected to cannister

    Hello, I wondered if anyone could provide a bit of guidance. I have a Helium cannister at 500bar pressure with a flow restrictor supplying Helium at 8 bar pressure to a room of 24m^3 at 1 bar pressure. The Helium flows down a 50m pipe. I want to calculate the pressure increase in the room...
  2. B

    Ideal Gas Law - Differential Approximation due to variable increase in %.

    Homework Statement This is a problem form my calculus book, which states: According to the ideal gas law, the pressure, temperature, and volume of a confined gas are related by P=kT/V, where K is a constant. Use differentials to approximate the percentage change in pressure if the temperature...
  3. T

    Can kinetic energy and potential energy both increase?

    Homework Statement A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. (a) What type(s) of energy is (are) changing? Is each type increasing or decreasing? Why? Homework Equations...
  4. J

    Analysis of Functions I: increase, decrease, and concavity

    Hello I need help with these problems. The direction said a. find the intervals on which f is increasing, b. the intervals on which f is decreasing, c. the open intervals on which f is concave up, d. the open intervals on which f is concave down and e. the x-cordincates of all inflection...
  5. B

    Why does magnetic force tend to increase magnetic energy?

    Hello. So: Why does magnetic force tend to increase magnetic energy? 1) Usually, forces go in the direction of energy minimums. Why in this case is the opposite? 2) What does it imply? What is that makes magnetism particular in some senses, for example this, for example its force function...
  6. J

    Friction increase decrease Help

    Homework Statement In Fig. 6-12, if the box is stationary and the angle θ between the horizontal and force is increased somewhat, do the following quantities increase, decrease, or remain the same? http://i.imgur.com/YcOFS.jpg a) Fx b) fs c) FN d) fs, max e) If, instead, the box...
  7. H

    Does it mean that as you increase the energy of a particle

    Does it mean that as you increase the energy of a particle, its mass will increase? Or, that for any given particle there is a certain container of certain mass/energy and part of that quantity is allocated to energy and the other to mass. In the latter case, could you not make a transistor out...
  8. C

    How to increase pH of lime water

    Hi to all, I'm in this problem: I've got to prepare a solution of Ca(OH)2 with pH=13.2 . On Perry I read that the solubility value of Ca(OH)2 at T=25°C is 1.65 g/L, so a solution with water and Calcium Hydroxide cannot reach pH=13.2. So I was suggested to prepare the mixture in the following...
  9. S

    Relative increase in fuel mass

    if a rocketship in space is approaching the speed of light and its relative mass is increasing then i assume the fuel mass is increasing which would make it more potent the closer the ship gets to the speed of light which would give it infinite force when the ship reaches the speed of light...
  10. A

    Why does repeated reflection increase amplitude?

    diamonds shine brightly because light inside them is reflected repeatedly within its walls.why this repeated reflection increase the brightness of light??
  11. K

    Why does decay increase Binding energy ?

    Can someone explain this excerpt from my textbook please? "IF nucleus A was made from its constituents (Binding energy) and it released 400MeV, but making nucleus B(product) releases 405MeV. Therefore if A changes to B, 5 MeV of energy must be released. This excess energy is given to the...
  12. N

    Capacitor to be connected to increase power factor

    A resistance 'R' ohm and inductance of 'L' henry are connected across 240V, 50Hz supply. Power distributed in the circuit is 300W, and the voltage across R is 100V. In order to improve the power factor to unity, the capacitor to be connected in series should have a value of __. a) 43.7 uF b)...
  13. E

    How to increase interest in ASME

    I'm hoping this is a good place to start with this question. I'm the incoming president of my university's ASME branch and I want to find unique ways to increase interest. Maybe I'm being to idealistic, but I feel like the organization has seen quite a drop off in interest in the last few years...
  14. N

    Increase voltage = increase in intensity of electrons - X-ray tube

    Hey, In x-ray tubes, how come an increase in the voltage results in an increase in the intensity of the electrons. i.e. the no. of electrons emitted per unit time per unit second. Thanks.
  15. H

    Doubling Water Pump Rate: Increase Motor Power?

    Homework Statement A pump motor is used to pump water at a certain rate from a given pipe. to increase the rate of pumping of water 2 times from same pipe by how much times power of motor must be increased? Homework Equations The Attempt at a Solution
  16. T

    Does testosterone increase cortisol's effects on the brain?

    I read in Dr. Ivy's book* that testosterone blocks the effects of cortisol and causes cortisol levels to rise in response to this cortisol resistance but has a net pro-anabolic effect (I guess in part because it blocks cortisol's catabolic effects and the body will not totally normalize the...
  17. B

    Does the Silver Wire Net Really Increase Gas Range Efficiency?

    There are rumors circulating recently on various forums on the internet that a net made of coiled up silver wires increases the efficiency of a gas range when placed on top of the gas burner while fuel is being burned. According to what manufacturers claim, this is done by using the reaction of...
  18. G

    Does heat increase reaction rates?

    I thought heat increased reaction rates, meaning that when something is at equilibrium, it should increase both the forward and reverse reaction rates... Is this wrong? Then why does Le Chatelier's principle predict that a temperature increase favors the endothermic direction?
  19. S

    Effect of temperature on increase in volume

    Hi, I have a fundamental question Density is mass divided by volume. As you heat something up the volume increases so the density decreases. Ok, but can anyone explain with a physical(intuitive) example: that is why is it that when you heat up something volume increases??Any intuitive...
  20. H

    What Force Causes Drift Velocity Increase in Wires of Different Diameters?

    consider two wires of different diameter. when current enters from that of greater diameter to lesser diameter drift velocity increases. which force causes it to increase?
  21. B

    Why is the increase in kinetic energy of the particle after being accelerated

    Homework Statement what is the increase in kinetic energy of the particle after being accelerated by a potential V/2? The Attempt at a Solution The textbook says it is q*V/2 but I just wondered why this is the case
  22. Ivan Seeking

    Netflix Price Increase: Is It Worth Paying for Separate Streaming and DVD Plans?

    Wow, a single 50% bump for the same service! If they plan to shift to a purely online format and to phase out the DVD rentals, I can live with the transition. But if they play games with online availability to force DVD rentals, I may be forced to start Redboxing it. I don't care about the money...
  23. T

    Increase in compressibility when pressure is applied

    I was running some structural relaxations under constant pressure, and found out that my system has compressibility which increases when pressure is applied. Of course, this is only up to a point, since at pressure high enough, phase transition will occur and compressibility will drop sharply...
  24. A

    Will more CO2 increase plant growth?

    I have been thing about this, seems logical in a way, most reactions increase with concentration surface area, temperature and catalysts. Some of the factors are listed here:- http://library.thinkquest.org/12497/factors.htm They seem pretty similar to the one I put in the answers to my...
  25. C

    Mystery of Capacitance Increase with Dielectric Insertion

    I thought capacitance was a function of geometry. So how come when we put in a dielectric in between a parallel plate capacitor it increases the capacitance. Is this because we can increase the E field in between without worrying about dielectric breakdown. Or does it have something to do with...
  26. A

    Why doesn't capacitance decrease with increase in temperature?

    why doesn't capacitance decrease with increase in temperature?? It is known that conductivity increases with temperature.This is because heat provides kinetic energy to the electrons in a substance,thus increasing the rate of "flow" of electrons.Considering this,the electrons in a dielectric in...
  27. J

    Increase in rote memorization in current students?

    I tutor at the science department's drop-in tutoring center at my university, and my supervisor seems worried about how students are learning things today. She says that she has noticed an increase in the number of students that don't really learn any material. They simply cram everything into...
  28. G

    Increase dielectric strength of a cylindrical capacitor

    Homework Statement You have a co-axial cylindrical capacitor placed in vacuum. The two co-axial cylinder tubes are made of copper. The outside tube radius a1 and inside tube radius a2, with overlapping length L; both tubes have a thickness of t. Say, the capacitor was designed to withstand 5...
  29. J

    Electrostatic increase of particle mass

    I understand that the electrostatic field around a charged particle contributes to its mass. It is as though there is a cloud of mass/energy centred on the charged particle that travels with it contributing to its inertia. I have found that the mass/energy of this cloud can be enhanced by...
  30. F

    Car things (Why does lead increase the octane rating)?

    Hey guys and girls The first thing I should probably ask is why do fuels (Hydrocarbons) spontaneously ignite when they are compressed, this seems rather strange to my brain in fact it makes my brain feel like it's having a meltdown (if you have ever had that feeling). The whole idea confuses...
  31. T

    Does size increase or decrease as mass approaches c?

    I'm a bit confused. Relativity states that we should observe a shortening of say a spaceship when it moves close to (c) correct? But isn't one of the reasons we can't accelerate mass to (c) because rather than reaching any higher speeds when getting close to (c) it would just increase in...
  32. L

    Does velocity increase gravitation?

    I understand that GR predicts that as an object's speed increases, so does it's mass. I wanted to know if there have been any observations that confirm this, by calculating the gravitational attraction of an object at varying speeds.
  33. Z

    Increase in entropy without change in temperature

    Can heat supplied to a body increase its entropy without even changing its temperature? I recall that increase in randomness is accompanied by a change in temperature.
  34. I

    How to calculate increase in kinetic energy due to acceleration?

    Hi all Hope some one can help with this Calculate the increase in kinetic energy due to acceleration? 0.6m diameter Solid cylinder with a mass of 120kg, initial velocity of 20.94 rad/s and final velocity of 146.61 rad/s. I have found an equation for the kinetic energy lost at...
  35. J

    Medical How much does the blood pressure in your brain increase?

    hi,please how much does the blood pressure in your brain increase when you change from a standing position to your head
  36. V

    Increase the distance between plates of a capacitor in direct current

    Hi. I've been studying in details how a microphone works. I've found a type of microphones where capacitor is used to record sound. The idea is simple. Increasing and decreasing the distance between the plates of a capacitor (sound waves) results in the changing capacitance. Being connected...
  37. T

    How do I increase the range of this RF transmitter?

    What is the easiest, cheapest what to increase the range of this RF transmitter? Right now it outputs 8mW which gives it about a 500 foot range. I need it to be increased to about 40 miles line-of-sight. http://www.sparkfun.com/products/8946
  38. B

    Find factor of the power increase?

    Homework Statement A periodic wave on a string has a frequency 178Hz and an amplitude 7.9cm. The wave speed in the string is 8.8m/s and the linear mass density is 0.0008kg/m. Power in a wave is proportional to the square of the amplitude and the square of the frequency. If the frequency...
  39. C

    Inside the Event Horizon: The Relativistic Effects on Mass and Light

    Let's say you're mass is 100kg and you're traveling at 0.9C. The relativistic effect on your mass is roughly 2.3 so you now have a mass of 230kg. If you went whipping past me, would you appear to have a mass of 230kg or 100kg? Seems like a no-brainer. But it keeps tripping me up! TIA...
  40. D

    Does a Seat Belt Increase Risk of Injury in a Car Crash?

    I'm doing a project for physics involving crashing cars into walls and recording the forces generated... I've heard that a seat belt actually causes most deaths in the instance of a crash... is this true? Thanks, "Practice is necessary to improve an athlete’s performance without it, the...
  41. O

    Does frequency of light increase if

    If you were to focus an extremely large area of light of a given frequency into a small area of empty space say from 300,000,000m X 300,000,000m into 1m^2...would you get an increase in frequency? I understand that the waves may collide and possibly summate... If the frequency of the light...
  42. I

    How to increase efficiency?

    Homework Statement We have a lab in which there is a ramp with one end on the floor and the other end is on top of a few textbooks. Therefore, it has a slope, and an object is lifted using the ramp. What can we do to this set-up to increase the efficiency, OTHER THAN INCREASING THE HEIGHT...
  43. T

    Investigating Unexpected Power Increase with Analogue FDM

    Hi guys, I am trying to implement Analogue FDM on top of my single carrier modulation (eg: QAM and QPSK) of Multi carrier modulation (eg: OFDM). For an example, I have two different pair of I and Q channels, where first pair is upconverted at 2.2 GHz and the next pair at say 2.7 GHz and them MUX...
  44. F

    Increase Fuel Mileage: Calculate Torque for 3500 lb Car

    Please help me and calculate the amount of torque required to sustain a car ,3500 lb car medium wind drag. aproxamently 70 mph. I know without wind resistance you can not figure exact but a close estimate would be greatly appreciated. Im wanting to add a secondary mini diesel engine 662 cc...
  45. J

    Mass added to a spring to increase period of oscillation

    Homework Statement 7. Mass m is oscillating on the end of a spring. How much mass must be added in order for the period of oscillation to increase by a factor of two? A.m B.2m C.3m D.4m E.8m Homework Equations f=-kx w= \sqrt{k/m} T = 2\pi\sqrt{m/k} The Attempt at a Solution...
  46. N

    How to increase force or length this unit?

    Please find attached a JPEG file ---- that when the lever is pulled down, there will be two actions: 1) the inner tube to the right will move no more than 1 inch and then the remaining effort to pull the lever down to it's "home" position will compress the springs creating the compression force...
  47. P

    Does Light Mass Increase a Black Hole?

    I'm just curious, when light enters a black hole, does the black hole gain a little bit of mass? We think of photons as massless particles, but they do have energy, and energy has a mass equivalent, e=mc2 Would the mass gained perhaps be, = hν / c2 ?
  48. L

    Increase Entropy: Solve 0.15kg Ball Dropped from 24m Tower

    Homework Statement On a day when the air temperature is 19 °C, a 0.15 kg baseball is dropped from the top of a 24 m tower. After the ball hits the ground, bounces a few times, and comes to rest, by how much has the entropy of the universe increased? Homework Equations ΔS = Q/T Also gravity...
  49. C

    Petrol Price Increase: 6.7% Drop in Mileage, 4.5% Increase in Cost

    Homework Statement After a rise in price of petrol, the driven mileage dropped by 6.7% , however the fuel costs increased by 4.5%. Homework Equations By what percentage did the petrol price rise ? The Attempt at a Solution isn't simply 4.5% ?
  50. O

    Rate of increase of a side of a triangle

    Hello, As I believe is normal policy, please don't give me the answer to the problem :) I would, however, greatly appreciate a bump in the right direction. Homework Statement Triangle abc: side a=12, side b=15, angle C is increasing at 2 degress/minute. How fast is the length of side...
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