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I often leave my golf clubs in the car rather than bothering to take them out I just wondered how much extra this is costing me. I have an Hyundai i30 ps109, ~1.2-1.3 tonnes and the clubs are about 10kg but more than happy for average car specs/approximations to be used. Can anyone do the maths...

Hi, I am currently working on science project. But I have a problem. I am conducting Chladni pattern experiment and so I got a function generator (signal generator). But for Chladni pattern experiment, a Function generator has to have an output of 10W. The maximum output of the function...

I just got my hands on a solar battery charger with a set of usage specifications that makes me believe it will only be useful some four days a month and will take more or less such time to charge a single set of batteries, despite promises on the contrary in the instructions. Since the case is...

Homework Statement A cylindrical tank of radius 4cm is partly filled with water.A solid metal sphere of radius 3cm is lowered into the water by means of a thin wire until it is totally immersed. Find the increase in (i) the depth (ii) the pressure at a point on the base (iii) the thrust on...

Hello guys I'm looking for a motor for my arrow saw project. I would like to use it to cut carbon arrows. Found one motor in the shop that is pretty small and will work perfectly with my jig. But it's rpm's are only 1650 and I need at least 8000 RPM. Is it possible to increase the motor RPM's...

To begin I'll just give a summary of what I'm looking to do, and then explain further for those who are looking for more information. The goal of the engine is having a forced induction motor capable of revving to higher RPMs (more power at the higher RPMs with FI) while still being somewhat...

Hi, I'm trying to find out what effect an increase in moment of inertia of a cylinder would have on slipping when the cylinder rolls down an incline. Starting with: ma=mgsin(theta)-f, where f is the friction force, which is less than or equal to µmgcos(theta), normal force times µ. We already...

I have a hose that temporarily stores pressure in it, and it is about 19.05mm (3/4 inch). The outlet diameter is 8mm, so the air is squeezing into an area ~0.4 times the size. Does this increase the air flow speed, or the pressure? Does it follow a rule similar to: P1*V1 = P2*V2 except...

It is like the throws in hammer throw, when an object is swung circularly, the it does contains an rotational energy right? when it is release, how the energy affect the objects? Does the energy change to velocity tangent to the circular path it swung?

Hi all, When an object is heated , why is the amount of change in its length directly proportional to the original length ? I have read that the increase in length it is directly proportional to the initial length in most of the articles. But I wanted to know how this proportionality arrived...

As energy cannot be created or destroyed, what happens to a black hole that captures a photon? Does the black hole's mass increase by the energy of the photon? Or is the photon simply trapped there, and then escape when the black hole finally evaporates from hawking radiation? Or something...

Solids tend to expand when heated or when they transition to a liquid. Is this thermal expansion a factor in the earth? If the diameter/volume increases, this would cause the surface area to increase also. This would lead to cracks, rifts or faults in the crust of the earth. Could this be a...

From the standpoint of temperature (not pressure), would components that could experience fission experience a higher fission rate toward the center of the Earth because of the higher temperature, or at ordinary room temperature conditions?

Ok in metabolic acidosis, renal compensation is increase in aldosertone, which cause hydrogen and potassium excretion leading to hypokalemia. But in metabolic acidosis transcellular movement occurs and there is hyperkalemia. What is the final result for potassium level. Hyper or hypo?

Homework Statement Consider a pump that is required to compress air in a factory. The cylinder in the pump has an inner diameter of 2.00 cm and length 60.0 cm. Air is drawn into the pump at atmospheric pressure and 18°C and the pump adiabatically compresses the air to a pressure of 17...

¿ How meaurements increase entropy? The decoherence before the measurement increase entropy but collapse returns the state of the system to a pure state. ¿Why then measurements increase entropy

Homework Statement For the function f(x) = x^3 - x^2 + 4x - 3 Homework Equations The Attempt at a Solution I found the first and second derivative, the first derivative is f'(x) = 3x^2 - 2x + 4 This is not factorable, as the discriminant is < 0, meaning there is no...

I hear they emit radiation which deionizes atoms. Is this due to the frequency of the x-ray? Is x-ray light considered radiation?

Hello have a question and am interested to find a simple equation to include mass as a variable regarding stopping distances of a car In the UK highway code... a braking distance = 14m for a car at 30 mph (48 kph) my questions are... if you load the car up fully (increase mass)... then...

Im definitely not an expert in this field but i have a question. From what I've picked up time dilation can be observed when a clock has a velocity or moves away from the centre of Earth and it slows/speeds up. In both these cases the clock has more energy, be it potential or kinetic. Could this...

16. A 1-kg mass of iron is heated through 1000 0C. Find the increase in its rest mass. Specific heat of iron is 500 Joule per kg per 0C

Hi, I know you can use gears to increase the torque of a motor while it is rotating, but what about when it is still? Will the holding torque be any different from the case without gears? I expect that there won't be any advantage, but want to make sure.

I'm a senior undergrad at the University of Michigan- Dearborn. I am a math major with a minor in applied statistics. Now that I'm near graduation (Fall 2013), I am considering my grad school options. I really want to get into the University Of Michigan's (Ann Arbor) Applied Statistics program...

Homework Statement Please try to keep this simple, I'm only fourteen. I was testing thermometric generators and the voltage and amperage generated at with increased efficiency. I noticed that when I increase the number of generators per circuit, the voltage increase slowed and the amperage...

Homework Statement The Moon and Earth have masses of 7.4 × 1022 kg and 6.0 × 1024 kg, respectively, and the distance between their centers is 3.8 × 108 m. The amount of work required to pull them further apart so that their separation increases by a factor of 1.6 is most nearly Homework...

Hi, I am trying to design an electrostatic generator that works well in high humidity. At the moment I'm looking at a van de graaf generator and covering the metal sphere with an insulator and only leaving a little bit exposed. Is this safe? And will it increase the maximum charge? My...

Homework Statement 32) A stone dropped into a pond at time t=0 seconds causes a circular ripple that ravels out from the point of impact at 5 metres per second. At what rate (in square metres per second) is the area within the circle increasing when t=10? Homework Equations I need to use...

I am new to the field and have stumbled across an issue. The current project I am working on is requiring me to calculate how many windings I need to increase voltage in a system from 12v to ~400v. The Initial winding will be fed from a 0 A.W.G. braided copper wire and the outgoing feed will...

Why do gradient show rate of maximum increase not decrease always?

Homework Statement A 3.0 kg object travels vertically at a constant speed of 2.0m/s. What is the increase in gravitational potential energy after 4.0 sec? Homework Equations Ep=Mgh The Attempt at a Solution I know i need to find the height but, with constant velocity i don't know...

A worker pushed a 23 kg block 13 m along a level floor at constant speed with a force directed 22° below the horizontal. If the coefficient of kinetic friction between block and floor was 0.40, what were (a) the work done by the worker's force and (b) the increase in thermal energy of the...

Homework Statement When you put batteries you place the negative terminals to the positive which supposedly "bumps' each electron to the next battery. However, the positive terminal is positive enough to neutralize the negative terminal and vice versa. Therefore, when I place batteries in...

It is commonly said (based on a quick Google search) that wrapping your beer in a wet paper towel and placing it in the freezer will allow it to cool faster than placing it in the freezer without said paper towel. Newton's Law of Cooling suggests otherwise. The fact that water releases energy...

What is the simplest way of solving this? The value of a house is doubled in 20 years. What is the annual average percentage increase, if it is assumed to be the same each year?

hello, what happen if cod rod length increase by few hundred microns?

I am designing an eeg circuit and planning to do an adc for it. Since the eeg requires a band pass filter I am planning to use a second order low pass bessel filter in it. Suppose I want to reduce the noise ( as I am working with low frequencies ) and increase the efficiency of the circuit...

Constant velocity problem, where does increase in energy come from? Let's say that an object is being pushed with a constant force across a surface, and it is moving with a constant velocity. We can use Newton's second law to show that the force of friction is equal to the force of the push...

I’m designing and hope to build a human powered helicopter (HPH) and am wondering if pressurising a thin walled aluminium tube by filling it with compressed air would strengthen it’s structural properties. Hope this is the right place to post this.

Ok, so I was just thinking about einsteins famous equation E=mc^2, and I was just wondering, if I were to take, say a rock or piece of metal. If I were to weigh it, and get it's mass, I could compute how much energy it contains. However, if I were to add heat to the rock or piece of metal by...

I'm working on a thermal balance of a building. In particular, I'm trying to calculate the effect energy gains (mostly due to solar radiation) have on the inside temperature of the building. So I calculated the energy gains per month, for instance, 20 kW for the month of February (it's an...

Hey guys, I have a question concerning CW generator which might be a bit stupid: How can we increase the voltage by using an AC source, capacitors and diodes ? Capacitors is used to store charge, diode to block current flowing the "wrong way", since its an AC current, capacitors will charge...

This, is just a concept question: My teacher gave the Answer has something like this: However I understand most of it, except the part where it says: What is happening in this? Where does the 4*pi^2*L*sin(theta) come from, and how is v found? why is f = 1/t?

I have read somewhere that electromagnetic waves would ionize radon and that would lead to air temperature increase as air contains radon particles. Do you think this is true?

Hi, May I ask you, i have a question about gases. Take a gas and give it under high pressure conditions. Then immediately give the same gas under no pressure conditions (some free space). Then my question is what will happen to the temperature of this gas? Can we observe the increase in...

The puzzle is: "The figure below represents a small, flat puck with mass m = 2.24 kg sliding on a frictionless, horizontal surface. It is held in a circular orbit about a fixed axis by a rod with negligible mass and length R = 1.03 m, pivoted at one end. Initially, the puck has a speed of v =...

If I am traveling along at a steady 60 kph in top gear ... and say my tacho is showing 2000rpm, then my "torque curve" says for this rpm the engine is outputting a specific torque - as I understand it, this is what is needed to zero out the forces from wind resistance and other frictional...

According to GR, the inertia of bodies is greater near masses. - https://en.wikisource.org/wiki/Geometry_and_Experience Has this been tested? I did not find a clear answer, the gravity tests seem to be testing other things. Can it be tested? Intuitively I think that it should be possible...

Homework Statement To increase the temperature of 50 grams of water by 2 Celsius degrees requires? Homework Equations The Attempt at a Solution As I understand it takes one caloric to increase 1 gram of water to 1 *C..Correct? since its 50 grams raised by 2*C, I have 50x2= 100 calories?

hi, does anyone know how to find how much axial pre-compression is required so that buckling will occur after a temperature rise of 50 C°? I know the cross section of the pinned at each end copper strip (4mm x 8mm) length= 100mm E= 100 GN/m^2 Coefficient of thermal expansion is 18 x 10^-6

ok, so, I know e=mc2 is a way i can find what quantity of energy a mass has. and i know that as objects increase in speed they become more massive, which i assume is also elegantly portrayed in this equation. but, this kind poses a problem for me, because i am wondering how much velocity...