increase Definition and 866 Threads

relativity states that as v approaces c mass increases but my question is that if we are going fast and suddenly mass increases then simultaineously we must slow down and thus we will be back to original state by this hypothesis i believe that mass expansion is only for minute seconds AM i...

Homework Statement When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV^(1.4)=C where C is a constant. Suppose that at a certain instant the volume is 450 cubic centimeters and the pressure is 81 kPa and is decreasing at...

Consider the following steady-state dissipative system. A mountain stream flowing 1 liter per second drops 100 meters over rocks and boulders, and at the bottom has both a temperature increase and a residual kinetic energy (velocity). The sum of the temperature rise and the kinetic energy is 980...

Homework Statement A particle travels across a heated plate according to the path f(t) = (t^2, sint) at the time t seconds. The temperature T(x,y) at position (x,y) on the plate is given by T(x,y)= 200E^[-(x^2 + y^2)] degrees Celsius. At time t=pi seconds, is the particle traveling in the...

2.1 x107 kg of ice and snow at 265 K slides 0.55 km (vertical distance) down a mountain in an avalanche. What is the increase in entropy? I am having trouble finding an equation on how to solve this problem. If anyone could help me at all, thank you.

I want to find the increase in the temperature of a resistor due to joule heating. I mean that if we apply some electrical power to a resistor then the electrical energy is converted to heat energy due to joule heating. The heat energy will increase the temperature of the resistor. Is it...

Might one have a warming planet, without CO2 increase? The last 15,000 years is evidence for such case, since pre-industrial CO2 is considered as ~280. If one had a slow down in vertical mixing (i.e. lower surface water turnover; say 1% over 100 yrs for 15,000 yrs- giving 150%), resulting...

I created an led flasher using a 555 IC, 2 1k Ohm & 1 100 Ohm resistor, and 1 1000uF and 1 .01 uF capacitor. If you need to know exactly how it's wired up I can make a schematic. My question is how would I increase the flash rate? I need a flash of about 3(up to 5) per second. As you can tell...

Homework Statement an 5kg object speed up from 5m/s(point A) to 10m/s(point B) at point A, the energy is 0.5mv2 = 0.5(5)(5)2 = 62.5J at point B, the energy is 0.5mv2 = 0.5(5)(10)2 = 250J I don't not sure why the energy in the object is increased when it speeds up from point A to point...

Homework Statement An Aerosol has a of pressure 250kpa at 17 C.The aerosol is left in the sun and its temp.rises to 27 C.Calculate new pressure in the can if its a 35% increase in the amount of vapour present. Homework Equations P/T= constant The Attempt at a Solution well tbh i...

An empty cylindrical canister 1.60m long and 89.0cm in diameter is to be filled with pure oxygen at 27.0 C to store in a space station. To hold as much gas as possible, the absolute pressure of the oxygen will be 21.3atm . The molar mass of oxygen is 32.0g/mol. How many moles of oxygen does...

I'm about to start a 4-year Masters degree in Physics at Imperial College London, which supposedly includes a Year spent in Europe, working on a research project. Recently however I am beginning to doubt myself as to whether it is worth spending that year abroad as I will have to spend a...

I am trying to settle a score on probability and odds, and I just wanted to see what everybody thought. This springs from the fact that when you watch "Deal or No Deal" and cases are removed one at a time, Howie frequently announces that there is a 15% chance that the case holds a million...

Is it proper to say that when the LHC accelerates particles, those particles experience a mass increase? What is the Special Relativity explanation of the mass increase, i.e. do the particles have increased mass when observed in the rest frame of the detector or do the particles have the same...

I've recently been pondering the following thought experiment: Assume that the Earth was to gain a large amount of mass in a very short time, which effectively increase the mass of the Earth by approx. 1.5 * 1021 kg, and this in course of say five years. What I've been trying to figure out...

Hello all, I was wondering if it is possible to increase voltage if you combine 2 DC motors together? I know that it is NOT possible to increase the voltage if you put it into a series circuit since it won't work. As for the batteries you can increase the volts if you put them into the...

Hi guys, :D MORE good news it seems. was reading , http://www.themanufacturer.com/uk/content/9339/Airbus_get_" and it said Airbus was getting a 28 million pound grant. This will keep close on 2000 http://www.careers-jobs.eu/aerospace-jobs" safe. Could this be the sign that things...

i have a camera with the horizontal field of view as 40 cm, and vertical around 30 cm noted at around 5m from the camera. I wish to increase the FOV of the camera. Please suggest me a few ways to accomplish that. thanx

Homework Statement How exactly does connecting cells in series increase the voltage on the atomic scale? Does it speed up the electrons somehow? Explanations appreciated!

If the expansion of the universe DID increase entropy, it would explain a lot of things but also leave me with a lot more questions.

how do you do heat energy questions? is it the energy lost? An unpowered 1600 kg object has an upward velocity of 7.0 x 10^3 m s at an altitude of 100 km above the earth. The object reaches a maximum altitude of 400 km. Earth 100 km 400 km v = 7.0 × 10^3 m s What is the heat energy...

Hello! I've attached an image below that shows a simple diagram of my question. I would like to know how to work out the area that I would need for a funnel to increase the air speed from 4.8m/s to 12m/s. The exit would measure 25 by 25, how big would the entrance need to be? I've...

Homework Statement When water freezes, it expands about 9.10%. What would be the pressure increase inside your automobile engine block if the water in it froze? The bulk modulus of ice is 2.00 multiplied by 10^9 N/m2. Homework Equations Delta P=-B*(Delta V)/V The Attempt at a...

I want to hear your opinion on this: Let's say that the universe in time zero consists just of a cloud of matter. Now as the time progresses, and the matter interacts gravitationally, it will gradually collapse into a sphere. Will the entropy of the universe really increase?

Hi Firstly, this is not a homework problem. It's regarding some flow experimental results I have and to understand the results further I am trying to identify possible reasons for the patterns I see. I don't have expertise in thermodynamics hence finding the following problem a bit puzzling...

Hello! I'm trying to make sense of what is probably simple. Imagine I have an IC package that is rated to dissipate at most 1 Watt. The thermal resistance from case to ambient is not known (could maybe be generalized). I have a heatsink that has a thermal resistance of 20°C/W. Can I...

We've heard of the water pipe analogy for electric circuit. It says that the current produces magnetic field and that the "pipe" is irrelevant - only the amp-turns are relevant. So I was wondering, is it possible to increase the amp-turns of a electromagnet by rotating it in the same direction...

1950 the average cost per semester of university in New Zealand was 129$ it is now $5500 per semester, these are averages strange huh? what's it like in America? you always see in movies of high schoolers wanting to get scholarships to go to college because they can't afford it another...

I need to know how can I increase the duty cycle of a pwm. Thank you very much :)

why is it that as the mass of a body increases greater propulsion is needed to move it, according to relativity. i thought that in a vacuum, an object is a lot easier to propel.

Homework Statement Let X_1, X_2,... be independent identically distributed continuous random variables. We call n the first time of increase if X_1>X_2>X_3>...>X_{n-1}<X_n Let N be the time until the first increase. Show that E[N]=e. Homework Equations Given for a discrete random variable...

Hi everyone, According to the equation Power = Force x Velocity or P = mav or a= P/mv, in order to keep say a rocket at constant accelration would require a CONSTANT INCREASE IN ENERGY INPUT PER UNIT TIME. This is somehow problematic to visualize for me. It would mean that accelerating a rocket...

I learn that increase of the beam size of the laser before coupling it to the fiber can increase the coupling efficiency of it. Can I know why is this so? Maybe the fiber is of very small diameter, and the focal lens in front of the fiber can't focus all the laser to this small diameter...

Homework Statement Why does water volume increase when heated past 4 degrees Celsius? 2. The attempt at a solution I know that water molecules move quicker when energy is applied (e.g. heat), but I don't understand why the volume of water must increase. Why can't water molecules just move...

Hi everyone, Today a strange thought came into my mind. We know that the mass of an object increases as it gets closer to the speed of light so it is often stated we would require more and more fuel to accelrate it further. However the mass of the fuel would also increase. What could be done...

Homework Statement when powder or granular solids are piled up. the powder forms a conical pile. the edge of the pile reaches a certain maximum angle with the horizontal, called the angle or repose. A) a pile of coal is found to have an angle of repose of 38% what is the relationship...

Sand is falling into a cone whose height is always 1/2 the diameter of the base. If the sand is falling at a rate of 1/2 cubic meters per min. How fast is the height increasin when the pile is 3 meters high? so far I've drawn my diagram and got this far. Given: h = 1/2 the base dv/dt =...

Hi Can anyone explain in detail about drag increase in supersonic speed Why and how drag increases in Blunt shape nose cone to compare with Sharp nose cone at supersonic speed? Ryan

There is a lot of speculation about why the Earth has not entered into a new ice age, following on from the pattern of glacial cycles recorded in the polar ice cores. It is a possibility that the Earth's tilt towards the Sun actually increased in the recent past. I know this sounds slightly...

A specimen has a potential difference applied, which remains constant throughout. The current through the specimen increases substantially though. Why does it increase? Is this to do with the temperature of the wire increasing and so resistance decreases and the current therefore increases...

Why does the resistance decreases with increase in temp for semi- conductors?

Homework Statement A wave takes 4s to travel form one end of the string to the other. Then the length is increased by 10%. Now how long does a wave take to travel the length of the spring? Homework Equations v = sqrt ( FL/m) F = -kx The Attempt at a Solution If the original...

why? why not?

Homework Statement A frieght train has a mass of 1.5x10^7 kg. The wheels of the locomotive push back on the tracks with a constant net force of 7.5X10^5N, so the tracks push forward on the locomotive with a force of equal magnitude. (ignore aerodynamics and friction) how long would it take...

the question is:- calculate the resultant increase in lenth of a 5m long roof tie rod made of 25mm diameter steel when subject to a tensile load of 80 KN. (assume E=210KM/mm2) does anybody know how to solve this or what the calculation is that i got to use? help apprecited thanks in advance!

Science news recently reported milky way rotates faster than thought - hence more mass. How does this work out for a single planetary body: If rotation is accelerated, my thought was: less gravity, bec. higher centrifugal force. Now, I'm thinking - more mass due to rotation hence more gravity...

Hi Folks, It seems there are some differing opinions in my office with respect to the following. If one is to pump water through a long lenth of 1.75" pipe (16000'), how would you go about predicting the temp rise of the water as it flows along the pipe? From what we have found, when...

hey guys i rebuild diesel engines and i am a facing a very serious problem as i am required to increase a diesel engine hp by at least 20% without adding a turbo charger i tried changing the fuel pump but it only increase 5% which is not enough do you have any idea what i should do ? right...

If you had a sum of money and the question asks that you want a 500% increase, does that mean a yield of 5x the original sum of money or 6x? Someone told me it was 6x but didnt really explain why.

Homework Statement Suppose that the build-up of fatty tissue on the wall of an artery decreased the radius by 10%. By how much would the pressure provided by the heart have to be increased to maintain a constant blood flow? Homework Equations Poiseuille's equation The Attempt at a...