Final Definition and 1000 Threads

Homework Statement A glider of mass 0.143 kg is moving to the right on a frictionless, horizontal air track with a speed of 0.750 m/s. It has a head-on collision with a glider 0.303kg that is moving to the left with a speed of 2.13 m/s. Suppose the collision is elastic. Homework...

Homework Statement 1 for picture38... apply loop analysis to find the current through the 2 ohm resistor 2 for picture39... apply loop analysis to find the voltage across the 10 ohm resistor Homework Equations v=ir kvl The Attempt at a Solution i'm using a, b, c etc as current...

heres my final one. thnx. Show that A_4, the group of even permutations on 4 letters, is a semidirect product: A_4 \cong (C_2 \times C_2) \rtimes_{\varphi} C_3 and describe explicitly the associated homomorphism: \varphi : C_3 \rightarrow Aut(C_2 \times C_2) thnx for help on...

Series and Sequence Convergence... final on monday please help! Homework Statement determine whether the sequence converges or diverges and find its limits 1(1+\frac{1}{n})^n 2 cos\pin the overbar indicates that the digits underneat repeat indefinitely. Express as a series and find the...

This promises to be a very difficult final vote since all the pictures that made it this far are outstanding. Please vote for the picture that best represents our theme, which is a reflection of an image. 1. Chi Meson 2. larkspur 3. fi...

A cup made of 100g of aluminum holds 200g of water at 50deg C, a 10g piece of ice is placed in the cup of water, what is the final temperature? 2. Homework Equations Q=L(f)m S=cm lnTf/Ti specific heat of aluminum 0.90 J/gC The Attempt at a Solution I think the first step is to...

can anybody here help me out with this problem? A quantity of 4.00 x 10^2 mL of 0.600 M HNO3 is mixed with 4.00 x 10^2 mL of 0.300 M Ba(OH)2 in a constant-pressure calorimeter of negligible heat capacity. The initial temperature of both solutions is the same at 18.46 degrees C. What is the...

Homework Statement How much heat is required to raise the temperature of 0.250kg of water from 20.0oC to 30.0oC? If this amount of heat is added to an equal mass of mercury that is initially at 20.0oC, what is its final temperature? Homework Equations Q=c*M*(t2-t1) The Attempt...

Finding Final Speed Using Work A person pushes with a horizonal 25N force over a distance of 1.2m on a 4.5kg crate, intially at rest on a frictionless surface. What is the final speed of the crate? heres my data list.. F=25N delta d=1.2m m=4.5kg v1=0 v2=? theta=0 degrees i used...

Homework Statement This is the last problem I'll trouble you guys with, I'm just completely stuck on it. Here it is. In the jet of a quasar, an ultr&relativistic electron collides head-on with a very low energy photon of the cosmic microwave background. No new particles are created...

Homework Statement A constant force of 4.0 N to the right acts on a 3.0 kg mass for 0.45 s. a)Find the final velocity of the mass if it is initially at rest. b)Find the final velocity of the mass if it is initially moving along the x-axis with a velocity of 12 m/s to the left...

Got http://www.tdcj.state.tx.us/stat/executedoffenders.htm" from a blog. It's a list of convicted offenders who've been executed in Texas and their final statements. Call me weird, but I find them fascinating to read.

Ehhhhh... this really isn't a "homework" problem but something derived out of curiosity(But I guess it could be considered homework-esque). Homework Statement Basically, not accounting for drag or friction, what'd be the final velocity of a projectile launched from a compressed air chamber of...

Homework Statement Homework Equations The Attempt at a Solution (3) I haven't been able to start this one at all. (6) I got part a (+45º P-state). I tried to do b and I got [1+i, -i+1] which isn't a polarization state, so I'm not sure what to do with c or if there is some...

"The Hall car of mass m-c is connected to mass m-2 by a string as shown in the figure below. The string passes over a solid cylindrical pulley, which has a frictionless bearing of radius R and mass M. When the system is released from rest the string does not slip, the Hall car moves down the...

if you have an exam in the next 24 hours, please don't click the link in this post. In fact ..don't even read the URL. It's too risky. Just walk away and don't look back. I told you not to even come in here, but you just had to, didn't you...

1. The problem statement, all variables and given/known i have to find all tangent lines in the equation below that pass though the point (0,0) y=x^{3}+ 6x^{2}+8i took the derivative and got this. y=3x^{2}+12x then i substituted the points x=0 and y=0 into the derivative equation and the...

This is the final vote for this contest. You have only one vote to cast. Please vote for the best picture on animals, not including domesticated cats and dogs. 1. turbo-1 2. larkspur 3. FredGarvin http://img104.imageshack.us/img104/4922/detzoo077smjh7.jpg 4. ~christina~...

If 0.22L of tea at 95 degrees C, is poured into a 150g glass cup initially at 25 degrees C, what will the final temperature be, assuming no heat is lost to the surroundings?

Homework Statement A 22.0 g sample of ice at -12.0°C is mixed with 120.0 g of water at 86.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g°C, respectively, and the enthalpy of fusion...

Homework Statement A large punch bowl holds 3.95 kg of lemonade (which is essentially water) at 20 C. A 1.74 kg ice cube at -10.2 C is placed in the lemonade. What is the final temperature of the system, and the amount of ice (if any) remaining? Ignore any heat change with the bowl of...

[SOLVED] Final Velocity (involving momentum) Homework Statement A 0.329-kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.222-kg puck that is intitially moving along the x-axis with a velocity of 2.24 m/s. After the collision, the 0.222-kg puck has a speed of...

I'm studying for my logic final and I can't seem to find an answer for this practice problem: (Using < as proper subset since I don't have the right type) T_1 < T_2 < T_3... be a strictly increasing sequence of satisfiable L-Theories. a) Show that the union of T_n is satisfiable (over...

Homework Statement A rotating star collapses under the influence of gravitational forces to form a pulsar. The radius of the star after collapse is 4.00 10-4 times the radius before collapse. There is no change in mass. In both cases the mass of the star is uniformly distributed in a...

This promises to be a brutally difficult contest to vote on. So congratulations to everyone who participated, and well-done to those who made it to the final round. Please vote for the best photo that depicts our theme - orange! 1. Chi Meson 2. turbo-1 3. larkspur 4...

Homework Statement Find the final velocity of the object if it is initially moving along the x-axis with average velocity of -62 m/s. Other information mass=.462kg time=5s average force = 0.8N impulse=4 Homework Equations F=m(Vf-Vi)/t The Attempt at a Solution I use the equation like this...

A shopper pushes a 25.0kg cart intially at rest with a froce of 25.0N directed at an angel 25 degress downward from the horizontal over a distance of 5.00m a) the work done by th shopper is ? b) The final velocity of the cart is

Homework Statement Two shuffleboard disks of equal mass, one orange and the other yellow, are involved in an elastic, glancing collision. The yellow disk is initially at rest and is struck by the orange disk moving with a speed of 4.40 m/s. After the collision, the orange disk moves along a...

[SOLVED] Elastic Collision - but no Final Velocities given! Homework Statement An object of mass 2.0kg is moving at 4.0 m/s to the right. It collides elastically with an object of mass 1.0kg moving at 12.0 m/s to the left. Calculate the velocities of the objects after the collision...

Homework Statement 5L of liquid nitrogen @ -205 degree celsius and 1L of liquid ice cream @ 15 degree celsius - they are both mixed. upon mixture nitrogen evaporates and ice cream hardens or freezes. Assuming only 14% of the energy gained by the nitrogen in the process of warming to room...

Homework Statement A block starts from rest at a height of 4:6 m on a fixed inclined plane. The acceleration of gravity is 9.8 ms^2. The box is 3.9 kg. The coeffiecient of friction is 0.18. The angle of the ramp from the ground up is 35 degrees. What is the speed of the block at the bottom...

Dan starts from rest and started running for a distance of 6.0 x 10(power of 1) m in 8 s. [4 Marks] a) What was Dan’s final velocity at this time? 6*10 = 60 -> 60/8 = 7.5 7.5m/s <-- is this right? b) What was the acceleration of Dan? 7.5-0 divided by 8 = 0.9375 so 0.9375m/s...

This is the final round of voting for this contest. Please vote for the best picture depicting a statue or more. 1. alex_caps http://bikeflat.com/albums/july34/linc2.sized.jpg 2. Integral http://home.comcast.net/~integral50/Photo_contest/f3HPIM1819a.JPG 3. fi...

Homework Statement A billiard ball going 4 m/s collides with a stationary ball of equal size cause the second ball to move at an angle of 35 degrees at speed of 2.5 m/s --mass=.3 kg What impulse (magnitude and direction) did second ball receive? What about the first ball? What is the final...

Both have mass of .5 kg and speed of 2.8 m/s; collide completely inelastically Do I use the conservation of momentum formula? v2= m1/m1 + m2 * v1? Ugh.

This promises to be a very difficult final vote, with so many incredible pictures. Please vote for the picture that best represents our theme, which is a picture of something beginning with the letter "Z". Good luck! 1. robphy - Zero http://img154.imageshack.us/img154/4276/dscn0976sh2.jpg...

Homework Statement After doing some exercises on the floor, you are lying on your back with one leg pointing straight up. If you allow your leg to fall freely until it hits the floor, what is the tangential speed of your foot just before it lands? Assume the leg can be treated as a uniform...

Homework Statement After doing some exercises on the floor, you are lying on your back with one leg pointing straight up. If you allow your leg to fall freely until it hits the floor, what is the tangential speed of your foot just before it lands? Assume the leg can be treated as a uniform rod...

Homework Statement A 7.0-kg rock is subject to a variable force given by the equation F(x) = 6.0N - (2.0N/m)x + (6.0N/m^2)x^2 If the rock initially is at rest at the origin, find its speed when it has moved 9.0m. The Attempt at a Solution \sum F_{x} = 6 - 2x + 6x^2 ma=6 - 2x + 6x^2 a =...

A need some help understanding the concept: A person on a trampoline bounces straight upward with an initial speed of 4.0 m/s. What is the person's speed when she returns to her initial height? The answer is 4.0 m/s. Can you guys explain why though? Thanks so much!

can i just multiply the acceleration by time to get the final velocity? and then, if i wanted to get distance with the same three variables-time, acceleration, and velocity, would i just multiply velocity by total time i am given? thanks in advance. I'm trying to clear some things up...

Water flows steadily from an open tank as in the figure below. The elevation of point 1 is 10.0m, and the elevation of points 2 and 3 is 2.00m. The cross-sectional area at point 2 is 0.0480m^2; at point 3 it is 0.0160m^2. The area of the tank is very large compared with the cross-sectional area...

[SIZE="3"]the left ventricle of the heart accleartes blood from rest toi a velocity of +26 cm/s. A)if the displacement of the blood during the acceleration is +20 cm, determine its accleatrion in (cm/s) b) How much time does the blood take to reach its final velcoity? Kindly please...

The radius of Mercury (from the center to just above the atmosphere) is 2440 km (2440103 m), and its mass is 0.31024 kg. An object is launched straight up from just above the atmosphere of Mercury. (a) What initial speed is needed so that when the object is far from Mercury its final speed is...

Homework Statement A rocket on its launch pad has a mass of 20,000kg. The engine fires at t=0s and produces a constant force of 500,000 N straight up. The engines fire for 1 minute during which the entire 10,000kg of fuel on poard is consumed and expelled from the rocket at a constant rate...

Homework Statement A sprinter can accelerate with constant acceleration for 3.40 s before reaching top speed. He can run the 100-meter dash in 10 s. What is his speed as he crosses the finish line? (in m/s) Homework Equations kinematic equations The Attempt at a Solution a...

Homework Statement A proton (q=+e, m= 1.67*10^-27 kg) traveling at 300 m/s enters a uniform electric region opposite to the field direction. a.) find the change in the energy of the proton as it moves 2 m across a potential difference of 100kV in this field. Express answer in eV. b)...

Okay, first post... don't be too hard on me! Just got around to joining the forum even though i have been browsing for quite some time. Homework Statement A sprinter can accelerate with constant acceleration for 3.30 before reaching top speed. He can run the 100-meter dash in 10 s...

Homework Statement On a pleasant fall day(temperature of 21.0 C) a lump of clay (with mass of .885kg) is thrown against the wall with speed of 38.0 m/s. the clay deforms as it sticks to the wall, noiselessly. assuming no heat escapes into the air, what will the final temp of the clay be.(clay...

A proton is released from rest at the positive plate of a parallel-plate capacitor. It crosses the capacitor and reaches the negative plate with a speed of 50,000 m/s. What will be the proton's final speed if the experiment is repeated with double the amount of charge on each capacitor? I...