Explanation:
It is given that the number of electrons passing through the cross-sectional area in 1 s is 
. Also, we know that charge on an electron is 
, then negative charge crossing to the left per second is as follows.
I- = 
I- = 0.544 A
As it is given that the number of protons crossing per second is 
, as the charge on the proton is 
, then positive charge crossing to the right per second is calculated as follows.
I+ = 
I+ = 0.224 A
I = l I+ l + l I- l
So, I = 0.544 + 0.224
= 0.768 A
Thus, we can conclude that the current in given hydrogen discharge tube is 0.768 A.
Answer:
45.11 kmph and 12.530 m/s
Explanation:
Average speed = Total distance travelled / Total time taken
406/9 gives the answer in kilometers
And we convert it to m/s by multiplying it with 1000/3600
Using idea of conservation of impulse-momentum theorem, the instantaneous velocity times mass is equal to force times the change in time.
mv = Ft
To reduce the force, decrease the velocity and mass. You can also extend the time of the collision. This is why cars collapse on impact. They were design that way to reduce the force on the car and the passenger.
Hopes this helps!
Answer:
Explanation:
Given:
- mass attached to the rope,
- given time,
function of height of the mass connected via a rope:
differentiate the above eq. with respect to time t gives us the velocity in vertical direction:
put the value of given time:
- As we know form the Newton'a second law of motion that the rate of change in momentum is proportional to the applied force.
Since volume and number of moles are constant, we
use the Gay-Lussacs Law to find the variable P2.
Gay-Lussacs law is expressed as:
P1 / T1 = P2 / T2
800 / 295 = P2 / 328
<span>P2 = 889.50 mm Hg (ANSWER)</span>
