PhysioEx Exercise 2 Activity 7
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PhysioEx Exercise 2 Activity 7
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PhysioEx Lab Report
Exercise 2: Skeletal Muscle Physiology
Activity 7: Isotonic Contractions and the Load-Velocity Relationship
Name: Gabriel Sanchez
Date: 16 March 2023
Session ID: session-12a9499c-8a35-ffff-3c0e-f9f45040832a
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
Experiment Results
Predict Question
Stop & Think Question
During an isotonic concentric contraction, the
You correctly answered: force generated by the muscle is greater than the weight of the
attached load.
1
During an isotonic concentric contraction
You correctly answered: the latent period increases with heavier loads.
2
During the latent period for an isotonic concentric contraction
You correctly answered: cross bridges cycle and, when muscle tension exceeds the load,
muscle shortening occurs.
3
Muscle shortening velocity
You correctly answered: decreases with heavier loads.
4
An isotonic contraction of a muscle is one in which
You correctly answered: the length of the muscle changes.
5
Predict Question: As the load on the muscle increases
, what will happen to the latent period,
the shortening velocity, the distance that the weight moves, and the contraction duration?
Your answer: The latent period will increase, the shortening velocity will decrease, the
distance will decrease, and the contraction duration will decrease.
1
3/16/23, 6:51 PM
PhysioEx Exercise 2 Activity 7
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex2/act7/
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Experiment Data
Voltage
(v)
Length
(mm)
Weight
(g)
Velocity*
(mm/ms)
Distance
Lifted
(mm)
Time
(contracting)
Time
(relaxing)
Twitch
Duration
(total)
8.5
75
0.5
0.100
4.0
40.00
38.00
78.00
8.5
75
1.0
0.057
2.0
35.00
14.00
49.00
8.5
75
1.5
0.022
0.5
23.00
7.00
30.00
8.5
75
2.0
0.000
0.0
0.00
0.00
0.00
*Distance divided by time (contracting).
weight = 0.5 g
duration of twitch = 78.00 msec
velocity = 0.100 mm/msec
distance lifted = 4.0 mm
weight = 1.0 g
duration of twitch = 49.00 msec
velocity = 0.057 mm/msec
distance lifted = 2.0 mm
What kind of contraction did you observe when you attached the 2.0 gram weight to the
skeletal muscle and stimulated a contraction?
You correctly answered: isometric.
1
3/16/23, 6:51 PM
PhysioEx Exercise 2 Activity 7
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex2/act7/
3/5
weight = 1.5 g
duration of twitch = 30.00 msec
velocity = 0.022 mm/msec
distance lifted = 0.5 mm
weight = 2.0 g
duration of twitch = 0.00 msec
velocity = 0.000 mm/msec
distance lifted = 0.0 mm
Post-lab Quiz Results
You scored 100% by answering 6 out of 6 questions correctly.
Which of the weights allowed the fastest muscle shortening velocity?
You correctly answered: 0.5-g weight.
1
Which of the weights induced the longest latent period of the muscle contraction?
2
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ME 3022 - HW 19
1. (More practice from Monday) A 90° elbow in a horizontal pipe is used to
direct a flow of oil (SG = 0.87) upward at a rate of 40 kg/s. The cross-
sectional diameter of the elbow is a constant 20 cm. The elbow discharges at
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40 kg/s
at both the inlet and the outlet.
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Example 10.5 A helical tension spring is used in
the spring balance to measure the weights. One end
of the spring is attached to the rigid support while
the other end, which is free, carries the weights to
be measured. The maximum weight attached to the
spring balance is 1500 N and the length of the scale
should be approximately 100 mm. The spring index
can be taken as 6. The spring is made of oil-hardened
and tempered steel wire with ultimate tensile
strength of 1360 N/mm? and modulus of rigidity of 81
370 N/mm. The permissible shear stress in the spring
wire should be taken as 50% of the ultimate tensile
The pea
given by,
T= 0.5 3
4C-
K =
4C-4
From Eq
8PC
T=K
nd2
:-
strength. Design the spring and calculate
(i) wire diameter;
(ii) mean coil diameter;
(iii) number of active coils;
(iv) required spring rate; and
(v) actual spring rate.
Step II Mear
De
Step III Numa
From Eq.…
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Simulink Assignment- Filling a Tank
In fluid mechanics, the equation that models the fluid level in a tank is:
dh
1
-(min
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dt
h is the water level of the tank
A is the surface area of the bottom of the tank
pis the density of the fluid
Mim and mout are the mass flow rates of water in and out of the
tank, the flow out is a function of the water level h:
1
mout
Vpgh
Ris the resistance at the exit. Assume that the exit is at the bottom of the tank.
g is the gravitational acceleration
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Your model should stop running as soon as the tank is full.
2. Assuming the height of the tank is 2 meters, after how many seconds does the
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Use the following constants to test your model:
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• p: the density of fluid = 1000 kg/ m?
• R: the resistance at the exit = 3 (kg.m)-1/2
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Ep (J)
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MEC 451 - THERMODYNAMICS
Faculty of Mechanical Engineering, UITM
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The pressure in an automobile tire depends on the temperature of the air
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60°
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© 2013 Pearson Education, Inc.
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Anasayfam Ders Kataloğu ME2005 54954 ME 2005 Dynamics- Midterm Exam 05.12.2020 @18:00 KTÜ Department of Mechanical Engineering Fall 2020 ME 2005 Dynamics Midterm Exam
01
Genel
Önceki Etkinlik
7.
Lecture 1 (08.10 2020)
2.
Lecture 2 (15,10.2020)
Lecture 3 (22.10.2020)
Soru 10
If the motion of one particle is dependent on that of another particle, each coordinate axis system for the particles
3.
Lecture 4 (05.11.2020)
Cevap kaydedildi
Lütfen birini seçin:
4.
3,00 üzerinden
a. should have the same origin.
Make-up Lecture- Lectu
işaretlenmiş
b. None
6 Lecture 6 (12.11.2020)
P Soruyu işaretle
c. can be directed anywhere,
7.
Lecture 7 (19.11.2020)
d. should be directed along the path of motion.
Lecture 8 (25.11 2020)
O e. should be directed perpendicular to the path of motion.
9.
Lecture 9 (26.11.2020)
10 Lecture 10 (27.11.2020)
Önceki sayfa
11 ME 2005 Dynamics-M
Sonraki sayfa
O KTU Department of
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- Simulink Assignment- Filling a Tank In fluid mechanics, the equation that models the fluid level in a tank is: dh 1 -(min Ap - mout) dt h is the water level of the tank A is the surface area of the bottom of the tank pis the density of the fluid Mim and mout are the mass flow rates of water in and out of the tank, the flow out is a function of the water level h: 1 mout Vpgh Ris the resistance at the exit. Assume that the exit is at the bottom of the tank. g is the gravitational acceleration What to Do: 1. Build a model in Simulink to calculate the water level, h, as a function of time. Your model should stop running as soon as the tank is full. 2. Assuming the height of the tank is 2 meters, after how many seconds does the tank fill up? Use the following constants to test your model: • A: area of the bottom of the tank = 1 m? • p: the density of fluid = 1000 kg/ m? • R: the resistance at the exit = 3 (kg.m)-1/2 • ho: Initial height of the fluid in the tank = 0 m • g: the gravitational…arrow_forwardMECT361 Mechatronics Components and Instrumentation Please solve the problem in keupordarrow_forwardQuestion 12 kana.Full explain this question and text typing work only We should answer our question within 2 hours takes more time then we will reduce Rating Dont ignore this linearrow_forward
- Dessert - sealed Date: Time: Made: 28/11/21 18:22 Ready: 28/11/21 20:22 Discard:03/12/21 18:22 Fri OLOGY BLANCHARDSTOWN - Google Chrome pluginfile.php/394133/mod_resource/content/1/PME1%20Sample%20Class%20Test%20Dec%202021.pdf FTECHNOLOGY BLANCHARDSTOWN 2/9 | 250% + | E O a) Calculate the principal stresses, given that the state of plane stress for an element is: Oy = 65MPA, Oy =-55MPA, Txy =-30MPa TXY Yarrow_forwardClasswork for PHYS220-A-Ali Sabbah-SP2021 Beirut Sec-A Beirut (MW 09:30-10:45) google.com/u/0/w/Mjc5NTQzMDc5NTgz/t/all PHYS220 Spring/20-21 Practice Sheet-1 Keys 1) A0.1 kg object oscillates as a s At a position X,, the object has a kinetic energy of 0.7 J and a potential energy 0.3 J. The amplitude of oscíllation, A, is: (a) 0.12 m (b) 0.22 m aple harmonic motion along the x -axis with a frequency f 3.185 Hz. (c) 0.31 m (d)0.42 m EJE thearrow_forwardA Do Now- Work and Energy Tran: x + ure.com/courses/44384/assignments/1494085 Al. O Google Drive LTI TumingPoint-Parti.. 4 Roots, Multi, and Fu.. A Roots, Multi, and Fu. A Roots, Multi, and Fu. O https://student.pas. y = 0 h Write down an equation for the total energy in the system at point 1 and point 2, before and after the change in height and speed. Part 2- Complete the Table using the image above: Use the tables below to calculate the kinetic energy of the cart at point 2 for the following values: m=2,000 kg, h; = 30 m, hf= 16 m Point 1 (initial) Point 2 (final) Ep (J) Ex (J) Ep (J) Ek (J) ETotal J) ETotal (1)arrow_forward
- dated metncpdf Thermodynamics An Engineering X E Module2-chap2propertiesofpure x O File C:/Users/DANIEL/Desktop/300L%202ND%20SEMESTER%20MATERIALS/Module2-chap2propertiesofpuresubstances-130703012604 phpap. ID Page view A Read aloud V Draw H Highlight O Erase 40 MEC 451 - THERMODYNAMICS Faculty of Mechanical Engineering, UITM Supplementary Problems The pressure in an automobile tire depends on the temperature of the air in the tire. When the air temperature is 25°C, the pressure gage reads 210 kRa. If the volume of the tire is 0.025 m3, Cetermine the pressure rise in the tire when the air temperature in the tire rises to 50°C. Also, determine the amount of air that must be bled off to restore pressure to its original value at this temperature. Assume the atmospheric pressure is 100 kPa. [ 26 kPa, 0.007 kg] 1. A 6 4 2:57 PM Lucky CORER 144 Tum lock 314 % 8 1/2 24 6 1/4 23 T K F pause Barrow_forwardBerserk - Chapter 2- Read Berserk compressor. reggienet.illinoisstate.edu https://reggienet.illinoisstate.edu/access/content/attachment/f6b18576-acf9-... Hint. Both power-sizing and indexing will be used. Ć + Question 3. The purchase price of a natural gas-fired commercial boiler (capacity X) was $181,000 eight years ago. Another boiler of the same basic design, except with the capacity 1.42X, is currently being considered for purchase. If it is purchased, some optional features presently costing $28,000 would be added for your application. If the cost index was 162 for this type of equipment when the capacity X boiler was purchased and is 221 now, and the applicable cost capacity factor is 0.8, what is your estimate of the purchase price for the new boiler? Hint: Use both indexing and power-sizing methods. 88 Illinois State University: TEC 330 001 FA2022 - Applied Economic Analysis For...arrow_forwardplease in detaildarrow_forward
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