Final Definition and 1000 Threads

Homework Statement A car with a mass of 1000 kg traveling with a velocity of 15m/s east collides with a 1200 kg minivan traveling at a velocity of 20m/s north. After the collision the car and the minivan are stuck together. Draw to the scale the final velocity vector of the car and minivan...

Homework Statement Lets imagine that in the movie 2010. The Discovery is rotating then they find it. Every time the ship reaches a speed in the circular motion of 24000 km/h the engine gives a burst of energy. Which amounts to 20 kN. The mass of the Discovery is 30.000 kg. The time from the...

Hi everyone, I'm a final year student majoring in physics in china, but I feel very confusing about my future. since I have not applied for any master or PhD program this year, I plan to work for a year before I make any decision regarding my study next year. Personally I am interested in the...

If the initial velocities of 2 particles are given, and the masses are equal, then is there some limit on what the final velocities can be? m1v1i+m2v2i=m1v1F+m2v2F (initial velocity of particle 2 is zero; v2i=0) v1i=v1F+v2F To clarify my question if particle 1 has an initial velocity...

Homework Statement 2.78 kg block is pulled (from rest) by a force (horizontal surface) of 15.8 N. The coefficient of kinetic friction is .106. What is the velocity after 2.88 m? Homework Equations fk=N(uk) Vf=sqrt((2*W)/m The Attempt at a Solution I attempted to find the final...

I need to be able to calculate the final velocity of an object accelerating towards a mass from a distnce with an initial velocity. From my little knowledge of calculus, I am only a junior in high school, i have figured out that this is probably a derivitive problem. But i have no knowledge of...

Homework Statement A 1.00 micro-F capacitor charged to 50.0 V and a 2.00 micro-F capacitor charged to 20.0 V are connected, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 1.00 micro-F capacitor? Homework Equations Q = CV...

Homework Statement I'm going to be doing a lab, in which I am going to push a block down a ramp. So right now, the problem I'm going to ask is conceptual, and not actually with numbers. So basically, I need to find the theoretical acceleration, and the theoretical velocity. Then, I need...

final velocity...need help! Homework Statement An object is to be thrown through a window 3.25 m high a distance 8 m away. It is launched at an angle 75 degree above the horizontal. The initial launch speed at the specified angle which will allow the projectile to pass through the window is...

Homework Statement A 1.22 kg piece of iron at 126.5 degrees Celsius is dropped into 981 g of water at 22.1 degrees Celsius. The temperature rises to 34.4 degrees Celsius. What will be the final temperature if this same piece of iron at 99.8 degrees celsius is dropped into 350 mL of glycerol...

just a quick question! will the final velocity of a free falling object always be negative even if the answer is positive?

Homework Statement A train on a straight, level track has an initial speed of 35.0 km/h. A uniform acceleration of 1.50 m/s sq is applied while the train travels 200 m. (a) What is the speed of the train at the end of the distance? (b) How long did it take for the train to travel the 200m...

Homework Statement The derivitive of the Xfinal=.5at2+Vinitialt+Xinitial Homework Equations Xfinal=.5at2+Vinitialt+Xinitial Xfinal= Final distance Xinitial= Initial distance a= Acceleration t= Time Vinitial= Initial velocity The Attempt at a Solution I have attempted the...

Homework Statement I am trying to calculate the estimated final velocity of a R/C hovercraft i am trying to built. The craft's weight is 6lbs and it is powered by a electric ducted fan that produces 21.3 ounces of thrust. Assuming this craft is actually hovering (no friction with the ground)...

Homework Statement An airplane flying 914 m above the ocean at 116 km/hr is supposed to drop a box of emergency supplies to the survivors of a shipwreck on an island. At what final speed will the supplies land on the island? Homework Equations The Attempt at a Solution So Vx =...

Homework Statement A 0.10-kg object moving initially with a velocity of 0.20 m/s eastward makes an elastic head-on collision with a 0.15-kg object initially at rest. What is the final velocity of the .10 kg object after the collision ? Homework Equations im not sure which equation to...

These are British Columbia (Canada) Practice Provincial Exams.. These are geared toward the BC Curriculum, however it does not defer greatly from other areas.. Select Grade 12, and check physics on the next page.. Great review material. http://www.bced.gov.bc.ca/exams/search/

Finally got my Diff. EQ. final grade in I took the final last Tuesday (a week from yesterday). I was eagerly (really anxiously) awaiting the final grade. Strictly looking at the numbers going into the final, my grade was probably a C+/B-. The entire semester I wondered if there was some kind of...

Well, I got a D grade on my intro physics final, which means i got the credits for the course, but my gpa has dropped down a few points. My teacher is not to blame but he sure didn't help either...he has a passion for the subject, but not for teaching. Anyway, I guess i should take it...

i have an A in chemistry, and i have been stressing that i will bomb this final exam, and all the hard work that went into getting an a will not be noted, because my final will turn into a C for the whole semesters .

**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 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 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...

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...