Max Definition and 1000 Threads

Please help, i can't answer part B, but think i am using the right equation! Thanks A student is designing a suspension pull rod for a car. The rod consists of a central tube section that has a wall thickness of 1.0 mm. The following tube diameters are available: 10mm, 8 mm and 6 mm and the...

Homework Statement The switch in the circuit is opened at t = 0. Determine the time required for the capacitor to charge to 53% of its maximum voltage in milliseconds. Given that R1 is 8.9 kΩ, R2 is 3.1 kΩ, C is 5.1 μF and Vs is 6 volts. Round your answer off to two decimals. Homework...

Can a man whose weight is 50KG (but powerful arms) lift another man with 70 KG weight using an overhead pulley. I guess no since the light man is not clamped to the groud, his arm strength will not bear any significance and he can lift only the wieght(on other side of the pulley) equal to his...

In my physics lab, I calculated a value of 5436 deg C for the max temperature of the filament by measuring its resistance. Is it possible for a filament to reach this temperature? I'm thinking it might be since the wire is so small that it wouldn't kill the world.

A particle moves with SHM of amplitude 10 cm and a maximum speed of 0.5 m/s. ...find the objects period

Homework Statement For the surface z=2x^2+3y^2, find (i) the gradient at the point P (2,1,11) in the direction making an angle a with the x-axis; (ii) the maximum gradient at P and the value of a for which it occurs. Homework Equations...

I am trying to construct an inexpensive inverter for a battery-powered AC experiment. I was planning on using as part of it a 74AC240 buffer chip, however, no matter where I look I cannot seem to find what its maximum operating frequency is. The inverter needs to produce a frequency of several...

I'm making a rc cart with 4 wheels with rubber tracks on them. Two front wheels are powered by two dc motors 3.5-15[Nm] torque. Torque of 15[Nm] represent stalled torque. Let's say that friction between wheel axel and body of cart is minimal. Diamter of axle is 10[mm] and the diameter of wheel...

Max Born, in his book "Einstein's Theory of Relativity", keeps referring to the luminiferous ether repeatedly, as if it were real. The book was published in 1920, it had been definitively proved by 1890 that no such thing as the ether existed. Can anyone tell why does Born keep going on with it?

I'm trying to come up with some ballpark ranges for RC electric powered aircraft. The literature I find so far on range, like the Breguet range equation, seems focused on mass change from fuel consumption which is not the case in battery powered electric aircraft. So I thought I would start...

The information I'm given is: frequency of light: 9X10^14 Hz magnitide of VA 1.3 V (not sure what this is, maybe stopping potential?) It says to simply state the max KE of the electrons so it must be quite simple but I just don't see it. I tried E=hf but this doesn't give max KE. Must have...

Okay guys, I have a question and I am sure the answer is stupidly obvious but I can't seem to find a equation explaining it. I want to know the max possible voltage of the capacitor based on the distance between the plates, the Area of the plates, and the resistance of the material between the...

I have a general question about the notation of min and max functions. I'm wondering if there is an accepted notation, used by mathematicians, for the min and max functions, other than the usual min(x,y) and max(x,y) that I typically see. To give similar examples for what I'm looking for...

1. Homework Statement A block given an intial velocity of 2m/s up a frictionless inclined at 60 degrees to the horizontal. What is the highest point reached by the block? 2. Homework Equations gsin(θ)=a a=v/t d=vit + 1/2at^2 3. The Attempt at a Solution Found vx = vsin60=...

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could you check this question if i am doing it right? http://vyew.com/844710/circuit_analysis_examples

Homework Statement A mass of "m" is attached to the bottom of a vertical suspended spring with spring constant "k". Attached to that mass is a string , that is connected to a second mass also equal to "m". What is the maximum amplitude for the two-mass oscillation system in order for it...

Hello physicists! I studying software engineering and for this semester, my group and I have build a lego segway. It runs perfect. Here is the question: We have set our balance task to execute each 4ms, but this is not based on any calculations. What we would like to calcuate is the...

Homework Statement A mass of 1.11 kg on a spring rests on a frictionless surface and has a horizontal force of magnitude 1.23 N applied to it to keep it 1.3 m from the equilibrium. The mass undergoes simple harmonic motion when released. What is the maximum speed? What is the maximum...

For my Project, two angular contact bearings are selected to support a spindle. However, I would like to preload both the bearings considering thermla expansion.. I would like to know the max. permissible preloading limits for the bearings. Could someone suggest me some good material or links to...

Homework Statement A 220 volt circuit is fused for 30 amps. How many 60 watt incandescent soft whote light bulbs with tungsten filament burning at 3,0000 celsius can be used at the same time in the circuit without tripping the fuse? Homework Equations N/A The Attempt at a Solution...

Homework Statement block of mass m = 5 kg is connected to a spring having stiffness constant k = 49 N/m, as shown in the figure below. The surface between the block and the table has μk = 0.1 In this figure, the block is presently held in place with the spring stretched by x1 = 0.8 m...

i thought the maximum deflection of a structure (a beam for example) occurred at the same location of the maximum bending moment. But, doing some homework I am getting contradicting results. does max deflection ALWAYS occur at the same location of the max bending moment? thanks for the...

Hello forum, what is the main difference between max power transfer and max power efficiency? In the case of max power transfer, the goal is to transfer the most energy to the load per unit time (impedance matching). Power is I*V and is about delivering energy very fast... High power...

Homework Statement Decide between a minimum, maximum, or saddle point for: (a) F=-1+4(ex-x)-5xsin(y)+6y2 at the point x=y=0 (b) F=(x2-2x)cos(y) with stationary point at x=1, y=pi The professor was a bit confusing, so I did it the way I remember from Calc, but am unsure of whether I...

Ok, so i need to find the max height that my rocket travelled, however, the only thin gi got is that a reader holding a clinometer is 50m form the launch site and is 1.78m heigh. According to him, my rocket traveled with a 59 degree in 3.83 sec (taken when the rocket's parachute came out at the...

Homework Statement A light spring of force constant 3.75 N/m is compressed by 8.00 cm and held between a 0.250 kg block on the left and a 0.490 kg block on the right. Both blocks are at rest on a horizontal surface. The blocks are released simultaneously so that the spring tends to push them...

Homework Statement A square pool with 100-m-long sides is created in a concrete parking lot. The walls are concrete 90 cm thick and have a density of 2.5 g/cm3. The coefficient of static friction between the walls and the parking lot is 0.49. What is the maximum possible depth of the pool...

Homework Statement For 6.5 s, a rocket rises in a straight line oriented at 70° from the horizontal axis with a constant acceleration module of 8m/s2. Then she is goes into free fall. Find: a) the maximum height b) its horizontal reach Homework Equations t = ( vfv - viv)/a d = viht +...

Homework Statement A bullet of mass 0.005kg is shot at a suspended block of wood with mass 1kg. The bullet initially has a speed of 200m/s, and passes through the block of wood. The bullet passes through the wood, and 50J of work is done deforming the shape of the bullet and block. If the...

Homework Statement A mass starts from rest at the upper rim of a semi-circle of radius 8m. In the bottom of this there is a region of size 1m which has a coefficient of kinetic friction of 0.5. What is the maximum height that the mass reaches after passing through this region once...

Homework Statement One mole of a liquid with a constant molar heat capacity of 132 j/mol K is initially at a temp of 80 C. The heat capacity is independent of tempearture. Calculate the maximum work that could have been done onthe surroundings while cooling the liquid reversibly. The...

I am working on a project and the topic is: Figuring out what the maximum height of a baton tossed vertically can be. I have never taken a physics class, so this is all completely new to me. I have been working for a little while now, and I didn't know if there were any ideas or equations anyone...

Homework Statement A basketball leaves a player's hands at height of 2.1 m above floor. the basket is 2.6 m above the floor, player shoots the ball at a 38° angle from horizontal. if the shot is made from a distance of 11.22 meters what is initial speed? answer is 11 m/s Homework...

Homework Statement If a mass of 609 kg travels in a circle with a radius of 102 m, and the μ= .13, and the acceleration of gravity is 9.8 m/s^2. What is the max velocity that the mass can go without canceling out the force of friction? Homework Equations ? The Attempt at a Solution...

Homework Statement the question says " when did the rock reach half its maximum height? Homework Equations a rock is thrown vertically upward from the surface of the moon at a velocity of 24m/sec and reaches height of s= 24t-0.8t^2 The Attempt at a Solution i figured out when...

So we first find where fx(x,y) = 0 and fy(x,y) = 0, where fx and fy are the partial derivatives of z = f(x,y). Once we find those critical points, we use D = (fxx)(fyy) - (fxy)^2. If D > 0 and fxx > 0, we have a local min at that point. If D > 0 and fxx < 0, we have a local max at that point. If...

Until I learn to walk my name might pop up a lot in this thread... A block of mass m = 2.4 kg is dropped from height h = 59 cm onto a spring of spring constant k = 1240 N/m. Find the maximum distance the spring is compressed. Answer: 0.170m The first thing I did was convert the height from...

Homework Statement The air table is approximately 25 cm square. If the incline has a rise of 1cm over that distance, what is the maximum velocity up the slope that a puck may have and not hit the upper wall Homework Equations ymax = (V^2sin(θ))/(2g) xmax = 2V^2sin(θ)cos(θ)/g The...

Homework Statement 2 blocks, mass 'M1' & 'M2' are connected by an ideal spring of force constant 'k' and placed on a frictionless surface. Force 'F' is applied on the 'M2' block. We have to find the maximum extension in the spring. 2. The attempt at a solution (1) The conservation of energy...

Hi all, I've spent some time studying the different interpretations of quantum mechanics and have come to the conclusions that none of them really make sense to me. Which made me think that that in itself actually makes sense as I'm just an African ape whose brain certainly didn't evolve in...

Homework Statement f(x,y)=(1+xy)(x+y) Homework Equations The Attempt at a Solution I started out by expanding and got: x+y+x^2y+xy^2 Then I found all my partial derivatives and second derivatives: f_{x}=1+2xy+y^2, f_{y}=1+2xy+x^2, f_{xx}=2y, f_{yy}=2x, f_{xy}=2(x+y)...

Hi, I want to find the maximum and minimum values of a column in a matrix. I have a 4 column, 100 row matrix and need the minimum and maximum value in the 4th column. I need this to be extracted along with the other values of that row. Can anyone help?

hey I am calculating energy of a blackbody emitter, and i have the flux (energy per unit area) and the peak wavelength emitted. how do i calculate total energy?

A photon having 20 keV scatters from a free electron at rest. What is the maximum energy that the electron can obtain? Homework Equations \lambda' - \lambda = (h/mc)(1-cos(theta)The Attempt at a Solution i just don't know where to get started or anythign can someone show me how to do this?

I'm having some difficulty with a homework problem which states: A cannonball is shot straight up out of a very powerful cannon located at the South Pole and reaches a maximum height of one Earth radius above the surface of the Earth. What was its initial speed? How long did it take to reach...

Homework Statement The question is as following: a) A dog in a stunt takes a jump off a rook which is 40 m high above the ground and lands on the next building which is of the same height , the gap between the two buildings is 6m @ the velocity of 8 m/s .Find the range of angles at which he...

Easy question Have a 5ft x 5ft x 5ft structure made from 3/8 carbon steel AISI 1018 I think What is the max load this thing can take? What's the formula? Stress=F/A F=Stress*A? Do I use the Modulus of Rigidity? Elasticity? Where can I find these values? thanks

Homework Statement For two equal-amplitude waves of nearly equal frequencies w+d/2 and w-d/2 (at a fixed position x), you have shown that the intensity exhibits \beats" which for d = 2pi Hz can be perceived directly by the ear, even though the main frequency is perceived only through the...

Homework Statement Bungee Jumping l=natural length of rope x=extension of rope y=total distance fallen m=mass,a=acceleration,v=velocity,g=acceleration due to gravity k=air resistance co-efficient Given data: The rope is stretched to twice its natural length by a mass of 75kg hanging at rest...