Final Definition and 1000 Threads

**theoretical linear algebra final in 14 hours*** I have some fundamental questions to ask.1. a linear transformation is invertible iff A is invertible. IS THIS TRUE? (dumb question but my brain hurts and I just need confirmation) 2. if a linear transformation is invertible, then it's an...

You place a beaker partly filled with water, into a sink. The beaker itself has a mass of 390grams and an interior volume of 500 cm^2. You now start to fill the sink with water and you f ind that if the beaker is less than half full, it floats but it is more than half full it sinks to the...

Homework Statement A 75 gram sample of silicon is at 25 degrees C. If 750 calories of energy is transferred to the silicon what is its final temperature? Homework Equations Not sure at all with this one. Please give any suggestions. The Attempt at a Solution Don't know where to...

Homework Statement A 100 g cube of ice at 0 degrees C is dropped into 1.0 g of water that was originally 80 degrees C. What is the final temperature of teh water after the ice has melted? Homework Equations What formula should be used in this problem? Am I forgetting variables...

Homework Statement A 75 gram ice cube at 0 degrees Celcius is placed in 825 grams of water at 25 degrees C. What is the final temperature of the mixture? Homework Equations What is the best formula to use in this question? The Attempt at a Solution I have attempted this problem...

Homework Statement A 17.674 kg 2.0m long horizontal uniform beam is hinged at one end and it is supported at the other end by a cable that makes an angle of 60 degrees to the horizontal. Calculate the tension in the cable when it has been shortened so that the beam makes an angle of 60...

Homework Statement I have a a circuit with an inductor, a resistor and a capacitor in series. I have analyzed the circuit and gotten an equation for the voltage across the capacitor to be. Homework Equations Vc(t) = 10 + (20/3)e^-5t - (50/3)e^-2t The Attempt at a Solution I...

I'm currently trying to solidify the notion of parity conservation in my head and saw this example on wikepdia, and am just wondering why in the reaction d + pion- ---> n + n (where d is a deuteron) "Using the fact that the deuteron has spin one and the pion spin zero together with the...

Hello guys! I'm REALLY and i mean REALLY frustrated due to the fact that i just can't solve this stupid assignment! I did a experiment at school with a weight attached to a spring. The weight was then set to do some swings where it sink into some water, a so called damped oscillator. I...

Homework Statement Few questions here, nothing super tough, just can't get it/ want verification. 1. The following experiment is repeated twice: a fair coin is flipped repeatedly until it lands heads. Let X be the number of flips required in the first trial and Y the number required in...

calc 2 final tomorrow need urgent help! Evaluate the derivative of the function G(x) = ({integral} from x to x^2) of sin(-t^2)dt this was on my review for the final and i just cannot get an answer. any help will be greatly appreciated.

Two separate flasks are each filled with a gas at 25 degrees Celsius; the valve between them is opened and the gases are allowed to mix. What would be the final pressure in torr after mixing, if initially F2 is in the first flask (Volume = 2 L) at 271.78 torr and N2 is in the second flask...

Homework Statement A 34 g block of ice is cooled to -75°C. It is added to 562 g of water in an 80 g copper calorimeter at a temperature of 22°C. Find the final temperature. (The specific heat of copper is 387 J/kg ·°C and the specific heat of ice is 2090 J/kg ·°C. The latent heat of fusion...

im having trouble find out when exactly is the intial speed and final speed when dealing with momentum...for example: i bounce ball...im using the conservation momentum equation and understanding what the initial and final is making me confused...

Homework Statement The spectral lines of the light from distant galaxies exhibit a Doppler redshift due to the motion of the galaxy away from our own. For a particular galaxy, three spectral absorption lines are observed from the Earth to have wavelengths of 164.4 nm 168.4 nm and 177.5 nm...

Homework Statement question 2 http://web.viu.ca/hearnd/Courses/Phys121/F02Test2/Page%201.htm" The Attempt at a Solution I have been trying to do question 2 on the practice test but I am stuck. I was trying to calculate the final velocities along each vector by using the equation...

Homework Statement A piece of iron weighed at 120 grams at 95.0 degrees Celcius is added to 750ml water of 25.0 degrees Celcius. What is the final temperature of the water when it is equilibrated? Assume the dentisy of water is 1 g/ml. (Specific heat of water is 4.184 and specific heat of...

I have to find the kenetic energy lost in the problem. I have both initial and final kenetic energy, how do i calculate the percent loss? I tried final over initial times 100 but that is not correct.

I was calculating the cross section for a particular decay and saw that I was off by a factor of half from the known value.. Now, the decay has two identical particles in the final state and I seem to remember having read somewhere that this requires a factor of half...but I am not able to...

Homework Statement Mass of person jumping off bridge = 60 kg The bridge is 60m above the river The cord only starts stretching after he falls 20m. k = 50 N/m Homework Equations gravitational potential energy = mgh elastic potential energy = (1/2)kx^2 The Attempt at a Solution...

The moment before a neutron star collapses matter is distributed across the whole volume of the neutron star? Can we say anything of the actual collapse, such as matter moves towards the center of the neutron star?

If this is in the wrong section, my apologies, but I'm wondering if it's possible, with known equations, to calculate the final velocity of matter accelerating into the event horizon of a black hole, and what those equations would be. I don't think this is an easy question, so any help is...

1. A spring with a spring-constant 3.6 N/cm is compressed 39 cm and released. The 9 kg mass skids down the frictional incline of height 36 cm and inclined at a 20◦ angle. The acceleration of gravity is 9.8 m/s^2. The path is frictionless except for a distance of 0.6 m along the incline which...

Homework Statement Two hockey pucks approach each other as shown in the figure below. Puck 1 has an initial speed of 21 m/s, and puck 2 has an initial speed of 14 m/s. They collide and stick together. Homework Equations The Attempt at a Solution The pucks didn't have a mass so I...

How common is it to have a final worth 100% of the course mark? Do you think it's a good idea? Why? Discuss.

Hi all. New to the forums. Rookie to Physics. I know this is a really simple question, but I am struggling with it. Help would be greatly appreciated. Q: Determine the displacement of a plane that experiences uniform acceleration from 66 m/s to 88 m/s in 12s. Wouldn't I use...

Homework Statement A ball of mass 0.540 kg moving east (+x direction) with a speed of 3.70 m/s collides head-on with a 0.440 kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision? ball originally at rest m/s east...

1. Experiencing a constant horizontal 1.10 m/s wind, a hot-air balloon ascends from the launch site at a constant vertical speed of 2.50 m/s. At a height of 205 m, the balloonist maintains constant altitude for 10.0 s before releasing a small sandbag. What is the horizontal displacement of the...

Collisions in special relativity So we are studying special relativity physics at school right now and I have a question and was hoping you could answer it for me, this is not homework related. Lets assume that there is only movement along the x axis. A is positioned at x = 100...

Homework Statement I have a test on this tomorrow .. please help.. A box, initially at rest, is pushed up a ramp by a constant force acting 20 degrees above the ramp’s surface (pushing into the ramp from behind the box). The magnitude of the force is 50.0 N. The coefficient of friction is...

Homework Statement Two capacitors of 34.0 μF and 125 μF are separately charged to 126 μC and 250 μC, respectively. They are then attached in parallel so that the + plate of one goes to the - plate of the other, and vice versa. Determine the final voltage across the two plates. Homework...

Rearranging equations ! Homework Statement Rewrite the equations to solve for the following 1) final velocity 2) initial velocity 3)time interval Homework Equations Aav = Vf-Vi/t Aav is average acceleration Vf is final velocity Vi is initial velocity t is delta T which is the...

Homework Statement You pour a certain amount of water at 100C and an equal amount of water at 20C into an insulated container. THe final temperature of the mixture will be (a) 60C (b) Less than 60C (c) greater than 60C. Homework Equations The Attempt at a Solution I don't know what...

Does anyone know any challenging Materials engineering related project I could undertake , I am in my final year and I would want a challenging final year project, preferably in industry.

Homework Statement A photographer in a helicopter ascending vertically at a constant rate of 12.5 m/s accidentally drops a camera out the window when the helicopter is 60.0 m above the ground. -How long will it take the camera to reach the ground? What will its speed be when it hits? a= -9.8...

Homework Statement if 100.0g of water at 100.0 C is mixed with 200g of water at 20.0 in an insulated container, what will the final temperature be? Homework Equations Q=MCdeltaT The Attempt at a Solution Since the energy change would be equal but opposite I though oh well I can...

Homework Statement A baseball thrown at an angle of 65.0° above the horizontal strikes a building 18.0m away at a point 5.00m above the point from which it is thrown. Ignore air resistance. 1- find the magnitude of the initial velocity of the ball.-found 2- find the magnitude of the...

Homework Statement A ball is rolled down a rough hill with coefficient of \mu<tan\theta. The hill has a height of h. The ball has moment of inertia of I, mass of m, and radius of r, which are all constant. What is the final velocity of the ball at the bottom of the hill? P.S. I made this...

Homework Statement All right so this will probably sound a little muddled but I'll try anyway. We conducted a lab today in class. We were given a hot wheels car, a meter stick, a ramp, and a stopwatch. We were told to find final velocity of total distance. We were not told how to actually...

Homework Statement A small metal sphere, carrying a net charge of q_1 = -2.70 \mu C, is held in a stationary position by insulating supports. A second small metal sphere, with a net charge of q_2 = -7.60 \mu C and mass 1.50 g, is projected toward q_{1}. When the two spheres are 0.800 \rm m...

Homework Statement Question: A motorcycle traveling at 40 ft/s is given an average acceleration of 4 ft/s^(2) for 10 s. Find the final velocity. Homework Equations Average Velocity= [displacement][/total travel time ] v= [[x][/2] - [x][/1]][/[t][/2]...

Homework Statement A student drops a ball from the top of a tall building; it takes 2.5 s for the ball to reach the ground. A.What was the ball’s speed just before hitting the ground? B.What is the height of the building? Homework Equations v=V(not) + at x=V(not)t + 1/2at(Squared)...

Homework Statement A startled armadillo leaps upward, rising 0.523 m in the first 0.206 s. (a) What is its initial speed as it leaves the ground? (b) What is its speed at the height of 0.523 m? (c) How much higher does it go? Homework Equations The five Kinematic equations The...

Hi guys, I am a mechanical engineering student and before the end of this year, I must select final year project to do research on. I am really interested in renewable energy and have a particular interest in wind energy/wind turbines. I am after a project that will require me to do site...

final speed ?? A 5 kg vase is lifted vertically from rest to a distance of 10 m with a constant upward applied force of 60.0 N. Calculate iii) the final speed of the vase F=ma 60=5(a) a=12 v^2 = U^2+2as v^2=0+2(12)(10) V^2 = 240 v= 15.49m/s is the step correct~...

Homework Statement Electrons are accelerated from rest through a potential difference of 250000 V. What is the final speed predicted classically? What is the final speed predicted relativistically? Homework Equations KE=0.5mv^2 KE=mc^2-m0c^2 The Attempt at a Solution...

hii friends... i am doing my final year engineering ...need some ideas for my project in zigbee or dtmf domain...mostly based on electrical field like power conservation, control of machines etc...

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Hello all As anyone with a front-loading washing machine knows, watching them in action can be great entertainment. Well, I was bored tonight and did just that. During the final spin cycle, the drum spins really, really fast (not too sure how many rpm) to wring most of the water out of the...

Homework Statement Find the final temperature? PV relationship -- PV^1.2 = constant P1 = initial pressure = 720 kN/m^2 V1 = initial volume = 0.4 m^3 V2 = final volume = 1.2 m^3 T1 = initial temperature = 225 C I managed to get the final pressure part out of the way but don't know where to...