Homework Statement
13.71 The path of the 3.6-kg particle P is an ellipse given by ##R = \frac {R_0} {(1+ecosθ)}##.
where R_0 = 0.5m and e=2/3. Assuming that the angular speed of line OP is constant
at 20 rad/s, calculate the polar components of the force that acts on the particle when it is at...
Homework Statement
13.69 A packege of mass m is placed inside a drum that rotates in the vertical plane
at the constant angular speed ##\dot {θ} = 1.36 rad/s##. If the package reaches the position
θ = 45deg before slipping, determine the static coefficient of friction between the
package and...
Homework Statement
13.54 The pentulum is released from rest with θ = 30deg. (a) Derive the equation of motion
using θ as the independent variable. (b) Determine the speed of the bob as a function of θ.
The solutions given in the textbok are a) ##\ddot θ = -4.905sinθ rad/s^2##
b) ##6.26\sqrt...
Homework Statement
13.53 The tension in the sting of the simple pendulum is 7.5N when θ=30deg.
Calculate the angular velocity and angular acceleration of the string at this instant.
Homework Equations
The Attempt at a Solution
Is this correct?
Homework Statement
13.49 The flatbed railway car travels at the constant speed of 80 km/h around a curve
of radius 55m and the bank angle 15deg. Determine the smallest static coefficient of friction between the crate and the car that would prevent the crate of mass M from sliding.
Homework...
This is problem 12.81 from Pytels Dynamics 2nd edition
1. Homework Statement
A train traveling at 20m/s is brought to an emergency stop. During braking,
the acceleration is a=-(7/4)+(t/16) m/s^2, where t is the time in seconds measured
from when the brakes were applied. (a) Integrate the...
Homework Statement
A projectile launched at A with an initial velocity of 24 m/s at the angle θ=60deg, impacts the vertical wall at B. Neglecting air resistance, calculate the height h
Homework Equations
The Attempt at a Solution
Here is my solution
As you can see to find height h I...
Homework Statement
A 2000-kg is launched vertically from the surface of the earth. The engine shuts off after providing a constant propulsive force of 60 kN for the first 20 seconds. Neglect the reduction in the mass of the rocket due to the burning of the fuel and the variation of the...
Homework Statement
The cart carrying the small 9-N package A is moving up the incline with constant acceleration α. If the package stays at rest relative to the cart in the position θ=45deg, determine the value of α. Neglect friction.
Homework Equations
The Attempt at a Solution
[/B]
Are...
Hey!
I have a question regarding this question that I have to answer. It is about the kinetics of a substance X whose product is 2Y. It is in Swedish and here is the translation:
The absorbance of a 0,030M-solution of X was calculated with the help of a Spectrometer. The Spectrometer was...
Hi,
We are currently working on a small-scale Fischer-Tropsch process.
The modeling software we are using is HYSYS (Aspen).
We want to produce X barils of oil / day using syngas (H2:CO ratio 2:1) using cobalt catalysts.
The problem we are currently facing is that we do not have the kinetics...
Technically, this isn't a question concerning supercritical fluids. It's more about converting thermal energy into velocity by playing "keep-away" with molecules that want to go supercritical.
The idea is simple. In an fully contained system, we can more or less say volume is static...
Homework Statement
Hi, I've been trying to solve this exercise for the last four hours and I'm totally stuck. The problems goes like this:
Given the mechanism in the image, located in the vertical plane, the OB cord is cut when t=0. Find the reactions Rx, Ry and N in {Kgf} for the instants...
Homework Statement
Hydrolysis of ethyl lactate
Determine the value of the rate constant for the hydrolysis of ethyl lactate from the following data.
Mass of ethyl lactate (grams): 0.5956
Concentration of stock HCl solution (M): 0.01023
Standardization titration volumes (of NaOH):
Run...
This post is not about a homework problem but about a derivation
When i was flipping through a physical chemistry book I found a formula which looked like
How ever I am clueless to what it is
Can anyone explain what it is for
And possibly Derive it
Thank you
Homework Statement
A positively charged particle initially at rest on the ground accelerates upward to 180 m/s in 2.70 s .The particle has a charge-to-mass ratio of 0.100 C/kg and the electric field in this region is constant and uniform.
What are the magnitude and direction of the electric...
Homework Statement
Calculate activation energy and pre exponential factor, i need help with the pre exponential factor
Homework Equations
Temperature °C
-20 = 253 k
-10= 263
0=273
10=283
20=293
Rate const. s-1
1.15
3.85
11.3
28.7
74.0
The Attempt at a Solution
i already plotted the graph on...
Homework Statement
An elevator departs the ground at t=0 With uniform velocity. At T1 a boy drops a marbel through the floor of the lift that falls under constant acceleration g=9.8 ms^-2. If it takes marbel T2 time to fall down, what was the height at the T1.
Homework Equations
h=vT1
h= vT2...
Homework Statement
The task is the following:
If the concentration of A decreases 0.03 M in one hour, then the concentration of B should to, which means, [ B] should be 0.05 M?
And if I try to calculate k, i get 14.87 l/(mol*h)
For second order reactions, t1/2 sould be 1/(k*[A]0)
So I get...
Hi everyone.
So I have been learning about equilibrium recently in class... and suppose I have the following reaction:
A(s) + B(aq) <-----> C(aq) + D(g)
[Note: in parentheses, I indicate the state of my substances]
So I was told recently that pulverizing my solid "A" would not change the...
Well,I know that the activation energy of a parallel reaction can be determined by the arrhenius
equation as (e1k1+e2k2)/(k1+k2) where e1,k1 and e2,k2 are the activation energies and rate constants for the two reacations.now consider the reaction A》B,and A》C since at every instant the reacted...
Homework Statement
A car travelling 10 m/s is moving along a track banked at 5 degrees. The tire-road friction coefficient is .3 What is the minimum radius it can travel without slipping?
v0= 10 m/s
Bank Angle Θ = 5°
μ=0.3
Note I am working through prep material for the exam. The solution...
Hi all,
I'm trying to come up with velocity equations for a multi-enzymatic system and came across this velocity equation. Does anyone recognize this equation?
There was no citation or derivation and the variables were not explained. This is my guess:
P, Q, A, B are concentrations of some...
Homework Statement
Overall reaction: A + F = I + J (just take = as the equilibrium sign)
It is first order in both A and B.
The following mechanism has been proposed:
1. A + B = C + D
2. C + D = E + B (B is the catalyst)
3. E + F = G + H
4. G + H = I + J
These are all...
Homework Statement
I need help for this kinetics question:
Chlorination of butene at 0 degrees c, liquid phase, dichloromethane as solvent.
initial concentration of butene is 0.1M
conversion of 47.71% achieved after 3.1 hours.
an additional 0.5M of hot butene was added at this point, which...
I have been looking at this enzyme kinetics stuff forever and was trying to come up with a summary for things... #=_=
Is this even right...? :/
|---------------|This segment I'm calling "Part 2"
k1 k2
E + S ES E + P
k-1
|---------------|This...
Consider the following generic equilibrium:
aM + bN ⇌ cO + dP
An equilibrium constant, K, can be defined as:
$$K = \frac{[O]^c [P]^d}{[M]^a [N]^b}$$
But couldn't we also define another equilibrium constant similarly with coefficients that are in the same ratio as our original equation? For...