Final Definition and 1000 Threads

A space vehicle traveling at a velocity of 100m/s separates by a controlled explosion into two sections of mass 850kg and 250kg. The two parts carry on in the same direction with the heavier rear section moving 120m/s slower than the lighter front section. Determine the final velocity of each...

Homework Statement A Copper wire has a shape given by a radius that increases as R(x)= aex+ b. Its initial radius is .45 mm and final radius is 9.67 mm and its horizontal length is 38 cm. Find its resistance. Homework Equations R = pL/A where p = resistivity of copper A = ∏r2 L = length of...

I'm currently taking first year Electromagnetism and I'm studying for the final, I was wondering if anyone has links to some good resources to help? Currently I'm just rewriting my notes and marking down any concepts I need to look into.

Homework Statement Hello, this isn't a math problem. I use Conceptual Physics by Hewitt. is there any comphrensive study guides out there? Homework Equations The Attempt at a Solution

Homework Statement A converging lens of focal length 8.100 cm is 20.3 cm to the left of a diverging lens of focal length 6.63 cm. A coin is placed 12.4 cm to the left of the convering lens. Is the location of the coins final image to the left of the convering lens, between the lenses, or to...

Because of brake failure, an automobile parked on a hill of slope 1:10 rolls 12 m downhill and strikes a parked automobile. The mass of the first automobile is 1400 kg, and the mass of the second automobile is 800 kg. Assume that the first auto- mobile rolls without friction and that the...

for the 1st two I used v is to the reference frame = 37m/s- -35m/s=72m/s a)ball=[(m2-m1)/(m1+m2)]v bat=v2=[(2m1)/(m1+m2)]*v b) I do not know how to solve for part b. The Attempt at a Solution

hi i need to perform a final value theorem for the ramp input shown below in order to find Ki Kp and Kv. could someone guide me on how to find these values? thank you

Homework Statement A novice snowboarder who weighs 60kg is sliding down a 10 degree slope at a constant velocity of 8 m.s^-1. When they reach the bottom of the slope, they slow down due to the kinetic friction between the snowboard and the snow. Find the rate at which the skier is de...

Homework Statement \int_0^1 \frac{4ln(3x)}{\sqrt{x}}dx Homework Equations The Attempt at a Solution I really don't want to type all this out, but since I hate when people don't, I will. I hope someone takes the time to help me out :) \int_0^1 \frac{4ln(3x)}{\sqrt{x}}dx=\lim{t...

A 15cm focal-length converging lens is 18cm to the right of a 4.0cm focal-length converging lens. A 4.0cm tall object is distance to the left of the first lens. For what value of is the final image of this two-lens system halfway between the two lenses? My attempt: I am working...

Homework Statement Derive the formula for final velocity, v_2, without time included in said formula. \overrightarrow{a}: Known \overrightarrow{s}: Known v_1: Known \Delta t: Unknown (can be calculated, but defeats the purpose) \overrightarrow{v_2}: Unknown and to be calculatedHomework...

Homework Statement A boy and girl are standing on ice skates and pulling on opposite ends of a rope. Find their velocities the instant they meet. How long did it take? Relative speed of approach is 2 m/s mass of boy = 60kg mass of girl = 50kg distance = 5m Homework Equations...

Good morning everyone. So I've been thinking quite a bit about it and recently switched from applied math to pure math, and I wish to attend grad school, if not PhD then at least a master's with thesis. I'm in the middle of my 2nd year, so next Fall I plan on taking Analysis, and then the fall...

Homework Statement (a) Calculate the speed of a proton that is accelerated from rest through an electric potential difference of 121 V. (b) Calculate the speed of an electron that is accelerated through the same potential difference.Homework Equations The Attempt at a Solution I actually...

I used mathematica to solve a restricted 3 body problem and was able to export my position data at different time intervals. How can I find my velocity at that final location?

Homework Statement A 2.3kg aluminum pan at 135° is plunged into 3.0kg of water at 15°. The specific heat of aluminum is 900 J/(kg K). Part A Find the final Celsius temperature of the aluminum and water. T_f = °Celsius Part B Find the entropy change of the aluminum pan...

Homework Statement A massless rope is wrapped several times around a solid cylinder of radius 20cm and mass 20kg, which is at rest on a horizontal surface. Someone pulls 1m of the rope with a constant force of 100N, setting the cylinder in motion. Assuming the rope neither stretches nor slips...

Homework Statement A 3.25 mol sample of an ideal diatomic gas expands adiabatically from a volume of 0.1050 m^3 to 0.762 m^3. Initially the pressure was 1.00 atm Determine the initial and final temperatures Homework Equations PVγ= nRT The Attempt at a Solution To get the initial...

Homework Statement A charged particle (either an electron or a proton) is moving rightward between two parallel charged plates separated by distance d = 1.90 mm. The particle is slowing from an initial speed of 93.5 km/s at the left plate. The left plate has V=-70V and the right plate has...

Homework Statement 250.0g of copper at 100.0°C are placed in a cup containing 325.0g of water at 20.0°C. Assume no heat loss to the surroundings. What is the final temperature of the copper and water? Homework Equations Conservation of Energy [SIZE="3"]mcCΔTc = mhCΔTh The...

First of all, do falling droplets have a final volume like falling bodies have a final velocity - in air? If so, is there a way to determine such volume for a specific liquid and a specific height? More specifically, the final volume of a semen droplet falling from a 1km height.

Homework Statement 8x^2-7a^2=19a^2-5ax Homework Equations None The Attempt at a Solution 8x^2-7a^2=19a^2-5ax 13ax^2-7a^2=19a^2 13ax^2=26a^2 Now I'm not sure what I should do next... Maybe divide both sides by 2 to get rid of the squares 13ax=26a Then say that ax = 13a ? I am confused.

Homework Statement A student places 21.4 grams of ice at 0.0C and 13.1 grams of steam at 100.0C in a sealed and insulated container. Determine the final temperature of the mixture. m(ice)= 21.4 g or 0.0214 kg m(steam)= 13.1 g or 0.0131 kg Ti(ice)= 278.15 K Ti(steam)= 378.15 K...

Homework Statement The current in a river flows North at 5mph. A boat starts straight across the river at 8mph relative to the water. (a) What is the speed of the boat relative tot he land? (b) If the river is 2mi wide, how long does it take the boat to cross the river? (c) If the...

Hi all, I was looking for some advice for my course as I have just entered the final semester of my final year and already find the workload overwhelming. I'm also trying to avoid leaving everything last minute like I usually do :) This semester I have 5 classes and a thesis to write(as...

Homework Statement bolt comes loose underneath an elevator that is moving upward at a speed of 6.0 m/s and reaches the bottom in 3.0s . find how high above the bottom of the shaft it came loose and the speed of the bolt when it hits the bottom. i figured out the problem but my question is...

Homework Statement 10 g of water from a water ice mixture (0 degrees C) is added to100 g of water at 20 degrees celsius. what is the final temperature of the mixture? C of water =1 kcal/kg*C Latent Heat of Fusion of water=79.7 kcal/kg Homework Equations Q=mC(Tf-Ti) Q=mL The Attempt...

Homework Statement A 100g piece of ice at 0.0°C is dropped into 500g of water at 100°C. What is the final temperature of mixture. Homework Equations Q=mL (latent heat) Q=mcΔt Qw=-Qx (energy absorbed by water is equal but opposite to that of substance inserted into water) specific...

Homework Statement A 50Kg skier skies down a 25 degree slope. at the top of the slope her speed is 4m/s and accelerates down the hill. the coefficient of friction is 0.12 between skies and snow. ignoring air resistance calculate her speed at point that is displaced 60m downhill...

Suppose you have a role playing game in which n players attack a boss with H hit points. Each hit reduces the boss's hit points by a certain amount. The players take turns hitting, starting with player 1, proceeding to player 2, onward to player n, and then back to player 1 again. Eventually...

As the title suggests, I have a physics final tomorrow and have been doing questions from past finals to prepare. I've tried to solve these independently since that is what will be expected of me on the test, but there are a couple that have me stumped. 1: The problem statement...

This was the final bonus question on my first university and I made a serious attempt at it. I know this isn't technically a homework question, so I will understand if it goes unanswered, by founding out if I did this correctly would go a long way to alleviating some of my final exam anxieties...

Ok before we get to number 3, I need to show you what I did for number 2 because this is kind of a two-part problem: PEinitial + KEinitial = PEfinal + KEfinal mgy + (1/2)mvi2 = (1/2)mvf2 gy + (1/2)vi2 = (1/2)vf2 (9.81)(10) + (1/2)(102) = vf2/2 98.1 + 50 = vf2/2 148.1 = vf2/2 2(148.1) = vf2...

Homework Statement Currently studying for a physics final on Wednesday 12/12/12 The problem can be found hereHomework Equations Not very sure. vfball=(v0(mball-mplank)+2mplankv0,plank)/(mball+mplank) mballv0=(mball+mplank)vf The Attempt at a Solution I have no idea how to do a. I've tried...

Homework Statement A meteor is approaching a planet of mass M and radius R with speed while it is far away. If there were no gravity, it would miss the center of the planet by a distance b. Gravity makes the meteor barely graze the planets surface as it passes. Find in terms of other given...

Homework Statement A 100-g sample of Cu(s), initially at 100oC, is added to 140 g of water, initially at 25oC. What is the final temperature of the mixture? Specific heat (in J g-1 oC-1) Cu(s) 0.385 H2O(l ) 4.184 Homework Equations Q = m * ΔT * c heat lost = heat gained = m2 * ΔT2 * c2...

Homework Statement A skier leaves the starting gate at the top of a ski jump with an initial speed of 4.00 m/s. The starting position is 120m higher than the end of the ramp, which is 3.00m above the snow. Find the final speed of the skier if he lands 145m down the 20 degree slope. Assume...

Homework Statement A 0.125kg basketball is rolling w/out slipping on a horizontal table at 4.50 m/s when it rolls off the edge and it falls to the floor, 1.10 m below. What is the rotational kinetic energy of the ball right before hitting floor?Homework Equations KE rot: .5 I w^2 KE...

Homework Statement Suppose that 20.0g of steam at 110°C is mixed with 25.0g of ice at -40°C What will the final temperature be? Ice - Specific heat capacity 2.10 J/g°C Water - Specific heat capacity 4.19 J/g°C Water - Latent heat of fusion 334 J/g Water - Latent heat of vaporization 2268...

Homework Statement Suppose that 20.0g of steam at 110°C is mixed with 25.0g of ice at -40°C What will the final temperature be? Ice - Specific heat capacity 2.10 J/g°C Water - Specific heat capacity 4.19 J/g°C Water - Latent heat of fusion 334 J/g Water - Latent heat of vaporization 2268 J/g...

I need help with a question. I think I have an answer, but don't know if it's right. It also doesn't add up to 0 if I plug in the final temperture into the equation. But I keep getting the same answer. Help please! A 150 g piece of copper at 90°C is placed in 250 g of water at 20°C. Assume...

Homework Statement Need a second person to help verify if answer is correct. Copper with a mass of 300 g initially at 200 °C is added to water with an initial temperature of 10 °C and mass of 500 g. What is the final temperature of the system when they are in equilibrium? ANSWER must be in...

Homework Statement Hello! This is my first time posting here but I have been viewing these forums for help in my physics class for a while. Lately I have been stuck on one single problem that I haven’t been able to find any help with anywhere online. Any who, here is the problem: a cat...

Homework Statement In the last second of a hockey game, a player slaps the puck in the empty net 32.5 m away. The puck leaves the stick with the speed of 41.5 m/s. Calculate the final velocity of the puck if its mass is 0.17 kg.Homework Equations μK = 0.005 μK = FK / FN F = ma v22 = v12 +...

Homework Statement A thermally isolated container is filled with 2.3 mol of an ideal gas at T = 0°C.The gas is then compressed from 1.9 m3 to 0.3 m3. What is the final internal energy U of the gas? (Assume the process occurs at constant pressure.) Homework Equations U=3/2nRT U=Q+W W=pΔV...

Hi Guys, I'm new to the forum so please be gentle with me. I am a final year mechanical engineering student in Ireland and i am doing my final year project on reduceing solidification cracks that are occurring in a weldment of a NI-Super alloy during the welding process. I believe that a...

Greetings Fellow Physics lovers! I was wondering if somebody could please check my work on this problem. A 5 kg block traveling at 10 m/s collides into a stationary 2 kg block. Find the final velocities of the two blocks after the elastic collision. V1f=(m1-m2)/(m1+m2) (V1i)...

Homework Statement The body B = f(x; y; z) belongs to R3, x^2+4y^2+3z^2<or equal to 3, x> or equal to 0 y> or equal to 0 z> or equal to 0 The body B has a volume density: M(x,y,z)= (xyz^2)/(1+x^2+4y^2+3z^2) Calculate the total mass and average density of the body. Sorry if...

Homework Statement Calculate the final velocity of a rocket if the velocity of the ejected gas is c, initial mass of rocket is M0 and final mass is Mr, v0=0. Homework Equations We have to calculate the final velocity of rocket. The Attempt at a Solution Because the total momentum...