determine

  1. S

    How to determine the number of turns of the winding?

    The problem: In the core made of electrical steel (Fig. 1), it is required to create a magnetic flux Φ = 4.2*10^(-3) Wb. Determine the number of turns of the winding, if the current is I = 5 A, and the dimensions of the core are specified in millimeters. Equations that are supposed to be used...
  2. F

    How to determine air pressure?

    In a restricted round tube what are the formulas for determining the pressure at the 3 designated areas? I would guess the far left section would be volume flow / restricting flow area. But I have no idea how to calculate after the main restriction. thanks for your help
  3. S

    What is the true way to determine time parameters from semilog graph?

    Hi all, I have experimental nuclear magnetic resonance data that describe T2-relaxation of the nuclei in the sample of interest. The experimental points obey bi-exponential dependence: I = I1*exp(-t/T2_1) + I2*exp(-t/T2_2), where I is current intensity, I1 and I2 are intensities which represent...
  4. S

    Nuclear Reaction - How to determine variables as much as possible

    Hey Guys, exercise: "It is desired to study the first excited state of 16O which is at energy of 6.049 MeV. Using the (alpha, n) reaction on target of 13C, what is the minimum energy of incident alphas which will populate the excited state? So, i suggest to define first the reaction equation...
  5. L

    How do you determine the speed of light.

    How do you determine the speed of light?
  6. C

    Determine the increase in entropy

    A 60 kg mass is dragged horizontally over a distance of 10 m across the floor. The friction coefficient between the mass and the floor is 0.2. Determine the entropy increase of the surrounding atmosphere which is at 25 °C.
  7. O

    Determine the density of oil and water using a u tube

    Hi, I have a question within physics practical, so I hope your help for solve this priblem. When I do this practical my text books says we should add high density liquid first and then lower density liquid. Also when we messure the heights of the liquids (due to pressure) if I want to...
  8. H

    How to determine the response function of an imaging system?

    I'm trying to solve the following problem: If I had an imaging system in a black box, how could I derive its response function? My first idea was to use a plane wave, and measure the output. I know that the convolution of the input wave with the response function gives us the output. As we...
  9. J

    Statics problem - determine the minimum weight

    I have two balls in a tube one a top of another zig zag postioned determine the minimum weight at which the tube wont tip over https://kek.gg/i/kpfvV.jpg r1=r2=120mm or 0.12m D=400mm=0.40m G=200N What I managed to get : r3=r1+r2=0.24m length between AB=D-r3=0.16m...
  10. B

    Determine velocity when given force function

    I integrated the function between x=5 and x=9 and got 60 joules. Then I set that equal to (1/2)mv^2 and solved for velocity. I got 9.60 m/s. Is this correct? My professor said the answer would be about 9 m/s.
  11. C

    Determine the natural frequency 2

    The question is: Determine the natural frequency of the rotor shown below given the following data: Moment of inertia of rotor Jr=0.6 kgm^2 Diameter of shaft d=38.0mm Length of shaft L=189.0 mm Material of shaft Steel Modulus of Rigidity 82 GPa My solution is...
  12. C

    Determine the natural frequency

    Determine the natural frequency in Hz of the system sketched below given the following values: Mass m=10kg Spring stiffness k=18kN/m Length a=114mm Length b=120mm I know that ω=(k/m)^0.5 So probably I need to calculate m. Should I write m=10*9.81*(0.114+0.12)?
  13. B

    How do I determine the amount of water in a sealed container to create a given pressu

    I have a sealed container with a volume of 1 liter. I want to go from an initial pressure of p1=1 atm and an initial temperature of T1=298 to a final pressure of p2=10 atm and a final temperature of T2=453 K. I want to to use water to create the pressure. But I do not know how to determine the...
  14. L

    determine forces in beam with hinges

    Is it possible to find the VA , VB and VC without ' breaking ' the beam into 2 parts ? 2. Relevant equations 3. The attempt at a solution Here's my working , i gt Moment about A = 10(1) -VB(2) -VC(4) +5(3)(4 + (3/2) ) = 0 Hence , 92.5-2VB -4VC= 0 moment about B = VA(2)...
  15. K

    How to determine shear rate in rotating plate?

    Hello, I was wondering how to determine shear rate in rotating plate as below. I believe the plate length (L) and height (H) should have influence on the magnitude of shear rate. What would be relationship between shear rate and plate length/height? Is there any publication about that...
  16. K

    How to determine shear rate in rotating plate?

    Hello, I was wondering how to determine shear rate in rotating plate as below. I believe the plate length (L) and height (H) should have influence on the magnitude of shear rate. What would be relationship between shear rate and plate length/height? Is there any publication about that? Thank...
  17. L

    determine the h for pressure

    for the horizontal force , why the s is given by 4.2m , it's not stated in the question , am i right ?
  18. L

    determine the velocity after collision

    three small spheres, A , B and C with mass of 3kg , 4kg , 7kg respectively are arranged as shown in the figure. Initially , sphere B is placed in static condition,while the sphere A is moving with a velocity of 4u towards B and collides . Then , sphere C move to right with velocity u , the...
  19. D

    determine pressure applied by truck driving into wall at different speeds

    i'm trying to figure out a formula to calculate the pressure of a truck pressing its bumper against a wall with the engine running at different speeds. this video shows exactly what i'm talking about: https://youtu.be/wWNE7kb3Mys the mass of the truck is ~2,500 kg, the area of the bumper...
  20. L

    determine the moment of inertia of the x axis of the cross sectional area.

    the ans that i gt is 173.9 , but the ans given is 173.9, which part of my working is wrong?