Final Definition and 1000 Threads

Homework Statement Problem statement and diagram in the photo Homework Equations K = 1/2 mv^2 U = mgh The Attempt at a Solution E_0 = E1 K_0 + U_0 = K_1 + U_1 using relevant equations and solving for v1 I get: v_1 = sqrt((v_0)^2 + 2gh_1) Then E_1 = E_2 solving for the final velocity and...

Homework Statement A compound microscope has an objective of focal length 12 mm and an eyepiece of focal length 50 mm. The lenses have a separation of 90 mm and an object of height 0.3 mm is placed 15 mm from the objective. Calculate: (a) the distance of the intermediate image from the...

Homework Statement An ice cube melts in a 10oC glass of water (mass of water is 225g). If the ice is allowed to melt completely, what will the final temperature of the water be? (we're told that the mass of ice can be ignored) Ti = 10oC Latent heat of fusion = Lf = 334000 J/kg specific heat...

The question is: a bullet that is shot from a target is traveling at an initial speed of 80 m/s and it is 6 m away from its target. The target is wearing a bullet proof vest that is 0.26 m thick. As the bullet makes contact with the vest is slows down at a rate of 9000 m/s2. What is the final...

People keep asking about setting a car battery on a concrete floor somehow ruining the battery. Here is the final answer on the subject. I have the 1930s Popular Science with the original tip in it (but don't ask me which issue). The auto tip was: "Leaving a car battery on a concrete floor...

Homework Statement Consider an inelastic collision between two blocks on a horizontal plane. Block M1 is moving with velocity Vo and collides with block M2 which is at rest. During the collision a fraction Q of the original kinetic energy is lost. It is observed that M1 is deflected by an angle...

Homework Statement I am attempting to understand this example shown below: Homework Equations During stead state DC, the capacitor is an open circuit and the inductor is short circuited. The Attempt at a Solution [/B] The questions I have are really related to the concepts as I don't...

Homework Statement A golfer hits a shot to a green that is elevated 3.0 m above the point where the ball is struck. The ball leaves the club at a speed of 14.0 m/s at an angle of 40.0° above the horizontal . It rises to its maximum height and then falls down to the green. Ignoring air...

Homework Statement [/B] Conservation of momentum of x components 10(20Cos(-30)) + 5(5Cos60) = 10v_{f}Cos(α) + 5v_{f}Cos(β) 185.7 = 10v_{f}Cos(α) + 5v_{f}Cos(β) Conservation of momentum of y components 10(20Sin(-30)) + 5(5Sin60) = 10v_{f}Sin(α) + 5v_{f}Sin(β) -78.3 = 10v_{f}Sin(α) +...

I had a question. If a glass rod, with a charge of 5.4x108 C touched another insulator so that all of the excess electrons are shared equally. What would the final charge on the rod be? I don't understand how to reach the answer of 2.7 x108 C. Thanks in advance. :)

Homework Statement So here is the problem, There is a .03kg block that is in an inverted cone, the cone has a slant length of 15 cm and a radius of 4 cm, and the coefficient of friction is .35. The block rotates around the inside of the cone, seamlessly, until it hits the bottom of the cone...

What will be the final temperature of 3.00 kg of crushed ice with temperature -3.0 C mixed with 4 liters of water with temperature 10.0 C? We can ignore all the energy exchange with the environment What I do know and I do: the weight of the ice = 3 kg Ice temprature = -3 C melting energy = 3...

Suppose a body moving in a curved path at a constant speed would its average velocity for a specific time period equal its final instantaneous velocity at the end of this period ?

Homework Statement A tank has a saturated liquid at 0.2 MPa. An amount of heat is transferred until the pressure in the tank became 0.1 MPa. If the volume of the tank 1 m3. Determine: 1- The final state of the water 2- The mass of the vapor in the tank 3- The work 4- The process on P-v...

Homework Statement Two glass vessels M and N are connected by a closed valve. M contains helium at 20 °C at a pressure of 1 × 10^5 Pa. N has been evacuated, and has three times the volume of M. In an experiment, the valve is opened and the temperature of the whole apparatus is raised to 100...

Homework Statement A paintball gun launches a paintball off a cliff at an angle of elevation of 45°. The cliff is 165 m high. The paintball is initially moving at 180 m/s. Calculate the speed of the paintball as it hits the ground. I'm having trouble understanding how to solve this, I have...

Should I opt to do research which would be very time consuming or focus primarily on my remaining upper level this year and get As? Thinking to do research after I graduate next Summer. I've only had 1 "REU" so far.

I am looking for any ideas for my final year project for my electronics engineering technology course... Please let me know some of your ideas

Homework Statement Determine if two circular objects (both moving or one stationary), collide and if so, determine their final velocity. The two objects are being rendered using Graphics's Java library class, updating their position 60 times per second. Their position (x,y) is determined based...

Homework Statement 2 moles of water at 20°C undergoes electrolysis at 5A/40V inside of a closed 40mL container for 1 min at standard external/internal pressure. What is the final volume of the system? Homework Equations (Q*M)/(F*z)=m Q=c x m x ΔT Vi/Ti = Vf/TfThe Attempt at a Solution Gas...

My friend is doing this for his final year design project and has hit a brickwall in terms of understand the actual process. Any help would be appreciated!

Homework Statement A 0.057 kg tennis ball moving west at 24 m s is hit in the opposite direction east with a tennis racket. The force acting on the ball during the hit is shown in the graph below. What is the magnitude of the final momentum of the tennis ball? A. 0.63 kgm s B. 1.37 kgm s C...

I am reading Paolo Aluffi's book, Algebra: Chapter 0. I am currently focused on Chapter I, Section 5: Universal Properties. I need some help Example 5.3 and Exercise 5.2 in this section. QUESTION 1Example 5.3 reads as follows: Can someone clearly explain why $$\emptyset$$ is initial ... We...

Good evening all, I am looking for a little guidance with relation to trying to find the initial and impact velocity of a section of a steel casting if it shears. Given the results of stress analysis, the mass of the sheared section would be 200kg maximum. The input force at that would be...

I'm a high school physics teacher and this was a question posed to my Honors Physics class. [Simplified] A light wave travels from water to air. Which of the following variables does NOT change between the mediums?" A. speed B. wavelength C. amplitude D. frequency I intended the answer to be...

What will the final velocity of 5.0 g bullet starting from rest if a net force of 45 N is applied over a distance of 0.80 m ?2.3. i tried to solve it but i don't know of my anwer is correct F=ma, F/m=a 45/.005 kg a=9000m/s^-2 From this formula ( d=1/2at^2) we can say that Time= 2d/a and...

Homework Statement A child (mc = 36 kg) is playing on a merry-go-round (mm = 225 kg, R = 2.9m) that is initially at rest. The child then jumps off in a direction tangent to the edge of the merry-go-round. The child has a speed of 5.0 m/s just before she lands on the ground. What is the...

1. Problem: Determine the final translational speed of a spinning disc that is dropped on an infinite horizontal plane. Think of spinning up an automobile wheel suspended over a road (wheel spinning normal to the road), then dropping the wheel on the road. When the wheel rim touches the road...

Hello everyone! I have my physics for engineering 1 final coming up at the Univ. of Minnesota and before I indulge into the problems, I wanted to run through when to use certain approaches such as kinematics, Newton's second law, Momentum, Energy, Rotation, and Torque. What I mean is when your...

Homework Statement *Questions 3, 5 and 6 have already been answered. 1) On page 1091, am I right to assume that example 4 could be solved using Green's Theorem? 2) How about for example 6, on page 1093, or would we need a higher dimensional analog? 3) What is the meaning of ""ds" in...

Homework Statement [/B] A 2.4 kg piece of wood slides on the surface shown in the figure . The curved sides are perfectly smooth, but the rough horizontal bottom is 31m long and has a kinetic friction coefficient of 0.27 with the wood. The piece of wood starts from rest 4.0m above the rough...

What do you call the final product or products that exit from a reactor

Homework Statement Homework Equations KEi = KEf The Attempt at a Solution since it is perfectly elastic, kinetic energy before = kinetic energy after (1/2) (m) (20m/s^2) = (1/2) (2m) (VBeamf^2) + (1/2) (m) (VBlockf^2) is this the right approach? [/B]

Homework Statement :[/B]There is a wall of height 30 meters.From the top edge of the wall a ball is thrown up with a velocity of 5m/s.Find the time taken by the ball to come to the base of the wall. Take g=10 m/s^2 Homework Equations :I used V=u+at[/B]The Attempt at a Solution v=0 as ball will...

Hi, friends! A block having mass ##m## frictionlessly slips from height ##h## on a ramp of mass ##M##, which has an angle ##\theta## with the floor, where it slips with no friction. I would like to prove that, as my book says, the ramp's speed when the block leaves it is...

Homework Statement 100 g of steam at 100C is mixed with 1 kg of water at 10C. What is the final temperature of the mixture? (in C) heat capacity of water: cw = 4.186 kJ kg-1 K−1 latent heat of vapourisation for water: Lv = 2256 kJ kg−1 latent heat of fusion for water: Lf = 334 kJ kg−1 Homework...

Homework Statement Consider a cannon on a 50m high cliff. The cannon shoots a cannonball with an initial speed of 200m/s at an angle of 30°, causing the cannonball to land 41m away from the cannon. What is the magnitude of the velocity of the cannonball the instance just before it hits the...

Homework Statement The pulley in the figure has radius R=0.160m and a moment of Inertia I_p = 0.560 kg*m^2. The rope does not slip on the pulley rim. As m_4 (4kg block) drops due to gravity, m_2 (2kg block) is dragged up a ramp inclined at theta = 65 degrees. The coefficient of kinetic friction...

Homework Statement A 25 and a 40 capacitor are charged by being connected across separate V batteries. The capacitors are then disconnected from their batteries and connected to each other, with each negative plate connected to the other positive plate. What is the final charge on each...

In the case of a word problem that asks you to round the final answer to a whole number, and most of the secondary steps involve decimals, do you keep the decimals until the end of the problem or do you round each answer to a whole number? For instance you're given two sides of a triangle which...

Homework Statement Jack and Jill are maneuvering a 3570kg boat near a dock. Initially the boat's position is https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char68.png2,0,9https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char69.pngm and its speed is...

Homework Statement An object with mass 161kg moved in outer space. When it was at a location https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char68.png7,-17,-9https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char69.pngm its speed was...

Homework Statement A box slides down an inclined plane (angle = 37*). The mass of the block is 35 kg, the coefficient of kinetic friction between the box and the ramp is 0.3, and the length of the ramp is 8 m. If it starts from rest at the top of the ramp, with what speed does it reach the...

Homework Statement An alpha particle (helium nucleus, charge +2e) starts from rest and travels a distance of 2.5 cm under the influence of a uniform electric field of magnitude 12.5 kV/m. What is the final kinetic energy of the alpha particle? Homework Equations U = 1/2 QV = 1/2 C(V^2) =...

Homework Statement 0.60kg of ice at O degrees C, 2.0 kg of water at 0 degrees 0 degrees, 3kg of iron at 325 degrees C are place in a sealed and insulated container. The specific heat for iron is c=400J/kg degree C, for water is c=4200J/kgdegree, for water is c=4200J/kgdegree celcius, for ice is...

Homework Statement Ball A with velocity +3.00 m/s collides with ball B with equal mass traveling at -2.00 m/s. What is the velocity of each ball after the collision. Homework Equations Not sure. The Attempt at a Solution I know that momentum is conserved because, but solving the conservation...

Homework Statement A massless rope is wrapped several times around a solid cylinder of radius R = 20 cm and mass M = 20 kg, which is at rest on a horizontal surface. Someone pulls 1 m of the rope with a constant force of 100 N, setting the cylinder in motion. Assuming that the rope neither...

Homework Statement Two cylinders, made from the same material and having the same length,have radii r1 and r2with r1> r2. Both are free to rotate about their respective axes. The larger cylinder is initially rotating with angular velocity ωo. The smaller cylinder is moved until it comes into...

My idea is about auto braking mechanism on vehicle. help me

I am doing Electrical and Electronics engineering. I am current in my 6th sem (8 in total). From the 7th sem i would have to choose a topic/project for my final year, which will go on till the end of the course. I want to pursue physics as my graduate studies. I have been trying to think of...