Homework Statement
Using Hess's Law and any necessary information from your Data Booklet, calculate the molar enthalpy of reaction for the combustion of ethene in kJ/mol.
im so lost!
i was going to find each sections molar en thalpy and then balance it but what's oxygens and do i multiply...
Homework Statement
Calculate the molar heat of reaction for the NaOH(aq)
calculate the percent difference for the value u obtained to the value of neautralization of sodium hdroxide, -57 kJ/mol
"assume the specific heat capacity of both these substances equal to that of water and that each...
Homework Statement
A baar magnet inserted into a coil of 500 turns induces a potential difference of 1.5 V across the coil. Determine the induced potential difference when;
a> 250 turn coilis used.
b> the bar magnet is moved twice as fast through the coil.
c> three identical magnets...
Homework Statement
A magnesium ion (Mg 2+) traveling at 60000 m/s enters a mass spectrometer with a magnetic field intensity of 800T. Calculate the radius of deflection forthe magnesium ion.
800T = |B|
24.31g/mol = m
60000 m/s = v
1.66* 10^-27= Atomic mass unit
r=?
Homework Equations
r=...
Problem:
An electron enters an external magnetic field in the same direction as the field. Explain what happens to motion of the electron while in the field.
I predicted the electron to stay still, since the angle between the direction of speed and external magnetic field is 0.
can anyone...
Homework Statement
Measurments indicate that there is a weak electric field of 150 N/C surrounding the Earth that points towards the center of the earth. Determine the absolute value of the electric charge of earth.
Homework Equations
F|e| = ma
|E| = |Fe| / |qt|
|E| = k|qs| / r^2...
:cry:Homework Statement
A 2000 kg car strikes a staitionary 1200 kg car and rebounds at 65.0 km/h@ 20 (deg) Sof E. After collision, the 1200 kg car moves at 40.00 km/h @ 35(deg) N of E. Determine the velocity of the 2000 kg car before the collision.
m1= 2000 kg
V1(before) = ?
V1(after)...
i get:
Fd (Vw- Vs) = VwFs
Fd( Vw-Vs) - Vw= Fs
and i don't go ant further since the first Vw is a possitive and the second is a negative... meaning they'll cancel each other out..
dont know what I am doing wrong!
The problem:
I have to answer a question about the Doppler effect using the formula attached.
I know i have to solve for Vw, but I get
Vw/Vw=(Fd/Fs)(-Fs)
and I am possitive that's not right, can someone please help me out??
Thankyou
Problem:
A 78.5kg man is about tocompletea bungee jump. If the bungee cord has a spring constant of 150 N/m, determine the period of oscillation that we will experience.
m= 78.5 Kg
k= 150 N/m
T=?
Relevant equations:
T= 2(pi)√(m/k)
The attempt at a solution
T= 2(pi)√(78.5kg/150...