increase Definition and 874 Threads

the function is: x/(x^2 - 9) i have found the horizontal asymptote(y=0) and vertical asymptote (x=3, x=-3) the first derivative is giving me problems =(

I read that lifting an object higher increases its potential energy. Is this true? I can't see how, considering: Ep = mgh F = mg so Ep = Fh F = (G x m1 x m2)/ d2 so Ep = (G x m1 x m2 x d)/ d2 so Ep = (G x m1 x m2)/ d So the greater the distance between the object and the...

By way of clarification, this post is intended as a question, not as some thinly disguised alternative theory. So, as possibly an uninformed generalisation, it seems that the verification of most cosmological models must ultimately depend on observations that are predicated on the detection of...

Hi folks, I'm brand new here... never been a part of a physics forum before and I'm just an amateur I have no professional or academic background hah most is a grade 10 "science" course (a unit on bio, unit on chem, unit on physics not even specified and barely touched physics). Anyways...

How are IGE antibodies related to an increase of allergies in the world?

Hi I was just wondering if anyone could please help me, I was just wondering what would happen to the supply curve if; 1. There was a recession. 2. And if oil prices increases. what would cause the supply curve to shift? thanks heaps for your help Mel

when approaching C the mass of your craft increases. If the mass of your fuel increases also wouldn't that mean the faster you go the more fuel youll have?

Homework Statement A simple pendulum consists of a small object of mass 2.4 kg hanging at the end of a 2.0 m long light string that is connected to a pivot point. (a) Calculate the magnitude of the torque (due to the force of gravity) about this pivot point when the string makes a 3.0° angle...

HI, My question as per above. A quick check with Physicsclassroom.com reveals that a (perhaps too simplistic) reason is that more and more air molecules are hitting the body as the body falls through the air. But i am confused. I thought when the body first falls through the air fluid...

I would like to increase the maximum current that a PWM signal from a microcontroller can source/sink from +-25mA to +-500mA. The output should have the same peak-to-peak voltage (0 to 3.3V) and should not be inverted (i.e. follows the input). The PWM frequency is ~30kHz. I have looked...

Hello everyone, In anameia related to iron, plasma tranferring increases and iron decreases. How does this increase the total iron binding capacity of the enzyme. If I draw a sample of blood, there would be some transferrin enzymes in excess lowering iron binding capacity right? Thanks :smile:

Will the velocity V2 be greater than or less than velocity V1 in the attached sketch? Yes and why or No and why not.

The radius of a circular ink spot, t seconds after it first appears, is given by: r=\frac{1+4t}{2+t} Find the rate of increase (in cm/s) at the time when th radius as doubled from its initial value. I have attached my working; however, the answer is 7/9cm/s and I keep getting...

We explain that as the size of metal cation decreases, the covalent character of the formed molecule increases. The reason given is that as the size decreases, the electron cloud is attracted more towards it as charge density is increased. Now, if I assume metal cation to be uniformly charged...

If electromagnetic waves loose energy as the increase their distance, is there an equation that reflects the loss of energy?

Increase reflector output? Greetings, I have been workings on a Solar Tracker. I have some small TV sat dishes that I am planning to cover with Mylar to create the reflector. After viewing some videos on YouTube I noticed that a larger dish produces more heat. Would adding a lens increase...

Hello; According to the GPE formula you gain gravitational potential energy as you go higher up (further from the centre of gravitation). Does this mean that your mass increases with distance? Thanks.

Hello, I was hoping someone could answer my question. So i am wondering ..lets say i have a p-n diode. What happens if i increase the dose of the p-side of this junction . What happens to the reverse breakdown of this diode? People say that the reverse breakdown decreases when you increase...

Until now, I always that that a relativistic mass increase was literally just the increase in the mass of an object. Today I googled it, and a couple sources say that it is just an increase in energy, not mass. Can anyone confirm this? At first I thought if the mass increased, then it would...

(In college) It seems possible that to have 4.0's and 3.0's , that it's logical to deliberately not take teachers who don't grade fairly? (For example particular teacher who assigns homework and then all of his exams look NOTHING like the homework. )

Homework Statement A clock is placed on a floor covered with lead density \rho and thickness d. Use dimensional analysis to show that increase in gravitational field strength at the clock dueo to the layer of lead is proportional to Gd\rhoHomework Equations The Attempt at a Solution to show...

Homework Statement An Earth (mass M) satellite of mass m is in a circular orbit of radius r1. It is moved to an orbit with a larger radius r2 by way of an intermediate elliptical orbit. This is achieved by firing rockets for a short period when it is in the inner orbit, and then firing the...

Hi, I was wondering... if by heightening a sofa (150cm in length approx) from floor level by about 20-30 centimeters, would increase, or could potentially increase the strain in the centre of a sofa when people sit on it? I have a long sofa, that was raised and I notice that my sofa is sagging...

Hello everyone, I always though when reactants are heated up, there are more collisions and more like a reaction is to take place. However this is not the case for spontaneous reaction according to Gibbs equation. Why is that? Thanks :smile:

I want to make a testing system to test a high pressure water pumps. I need to know how much is the flow in a certain pressure. I bought a flow meter to measure the flow but I couldn't simulate the pressure I need. I DON'T know if there is a kind of valve that can increase the pressure to make...

Wikipedia says that the core temperature of our Sun is 15.7×10^6 Kelvins. I don't know what that means in terms of protons' velocities inside the core, but I bet they move pretty fast. Could they move that fast that they have a noticeable increase in mass due to their relativistic speed...

I recently attended a lab at uni where we were required to examine the conservation of energy for a fluid steadily flowing through a pipe with a series of obstructions. The actual setup was quite simple; A pipe of length ~4m ran horizontally (no change in elevation throughout the whole flow)...

by how much will single-slotted Fowler-type flaps increase the drag coefficient of an aerofoil?

my uncle has been watching the videos on youtube with all of the people who supposedly gained gas mileage by installing a water electrolizer on their car and running the gases emitted into the intake. now I've tried telling him about the conservation of energy law and how that little bit of HHO...

I have propelled a wagon by a spring that gives out a constant force with various weights added and the wagons acceleration when the first weight is added increases from what it was with no weights. When the next weights are added the acceleration fall from what it rose to but I'm stumped...

Approximetly how much is the drag coefficient if orginally the coefficient is 0.02689. I know it depends on aircraft etc but I am only looking a rough estimate.

1. Wind turbine produces 8MWatts (If wind speed is proportional to the 7th root of altitude) (Wind power is proportional to the cube of wind speed First the turbine is at 450ft then reconstructed at 650ft, how much faster is wind speed? and how much more power?2. Sw= 7√Altitude, Pw= (Sw)33...

Hi, I'm having trouble understanding what exactly the gradient of a scalar field represents. According to wikipedia and the textbooks I have it points in the direction of greatest increase and has a magnitude of greatest increase. This by itself seems fine. However, I have also been using it to...

Homework Statement At Earth’s location, the intensity of sunlight is 1.5 kW/m^2. If no energy escapes Earth, by how much would Earth’s mass increase in a day? (Radius of Earth is 6.37 × 10^6 m.) The Attempt at a Solution ok so, at anyone time, half of the Earth is lit. so surface area lit =...

Homework Statement Does the current drawn by an electric motor increase or decrease as the motor starts from rest? Homework Equations The Attempt at a Solution I can't find an answer anywhere. I would think it would decrease because less power would be required to keep the motor...

y=-(x-3)^5(x+1)^4 For this function currently i have: degree: 9 sign: negative ? quadrants: I, II and 4 Roots: x=3 and -1 y-intercept= 243 domain: x belongs to E range: y belongs to E INTERVALS of INCREASE : ? INTERVALS of DECREASE : ? End Behaviors: As x approaches -infinity, y...

I am a trumpet player at a conservatory and I've been told for years that reducing the amount of air pressure through the trumpet will increase the volume of air that flows through the instrument. The people that have told me this always cite Boyle's law, but my understanding is that Boyle's...

In normal conditions, it takes a long time for wood to burn. But if you add some oil (or something similar like butter) it tends to burn faster. So, does adding such additives increase the calorific value? What makes the wood burn faster? Is the "faster" burning of wood and calorific value...

Homework Statement Consider the behavior of the circuit, when various values increase or decrease. (Select I-increases, D-decreases, If the first is I and the rest D, enter IDDDDD). A) If R3 decreases, the current through R4 ___. B) If R3 decreases, the current from the battery ___. C)...

Homework Statement I am trying to understand how will the radius of a circular beam grow when a torque is applied. There is a beam with length l, radius r, and a moment M1 applied on it. Its radius will grow with dr. What is the Young modulus of the beam? M= 15 N m r= 0.008 m l= 0.2 m...

We were covering Lorentz Transformations yesterday in class and going over the derivation from Gallilean transformations. Obviously everyone knows that in Gallilean Transform, it is basically velocity addition depending on which refrence frame the observer is in. When dealing with speeds...

why there is sudden increase in the small reverse saturation current at the breakdown voltage?...

Hi, I am not a mechanical engineer but an aeronautical engineer. Hence I am very poor with Mechanics & request for your help. I am working on design which produces approximately 17,400N-m of Torque at 25RPM. I want to maintain this Torque but increase the RPM to 1500. Is that possible? I...

Hey all, I'm sure this is simple, but I can't seem to find the answer in the Maple help section. When drawing 3D shapes, I want to be able to up the number of dots used to constitute the image, thus increase the resolution of the object. My spheres are showing up a bit boxy...

Homework Statement Hi, this isn't a homework question, it's for a physics project! Consider the following diagram: I was wondering what the speed of the air would be at the point A (orange dotted line). The red rectangle is a packet of air of height 1m and width d. Presuming that...

Could placing a photovotaic inside of focus of a concave mirror amplify the effiecentcy X times?would commercial panels take the extra lumens?

Hello everyone, Can anyone explain simply why heart rate increases in inspiration. Also why does the aortic valve close before pulmonary valve in inspiration? In inspiration does superior vena cavae get more blood? From what I read there was something to do with blood pooling inside the lungs...

Homework Statement A person weighing 6.0 × 102 Newtons rides an elevator upward at an average speed of 3.0 meters per second for 5.0 seconds. How much does this person’s gravitational potential energy increase as a result of this ride? (1) 3.6 × 102 J (3) 3.0 × 103 J (2) 1.8 × 103 J...

i was thinking of using a 555 timer to create a low duty cycle TTL square wave to power an array of Inferred LEDS at a very high current for short segments of time. basically i want to get really high outputs from an led and keep it from frying itself by turning it on and off really really...

Homework Statement What could you do to increase efficiency between the cart and the ramp? As in pulling a cart (with wheels) up an inclined plane. Homework Equations The Attempt at a Solution One solution could be increasing the angle to increase efficiency. I was wondering...