The energy of the stars comes from nuclear fusion<span> processes. For stars like the sun which have internal temperatures less than fifteen million Kelvin, the dominant fusion process is </span>proton-proton fusion<span>. For more massive stars which can achieve higher temperatures, the </span>carbon cycle<span> fusion becomes the dominant mechanism. For older stars which are collapsing at the center, the temperature can exceed one hundred million Kelvin and initiate the helium fusion process called the </span>triple-alpha process<span>.</span>
Answer:
292 m
Explanation:
Step one:
given data
initial velocity velocity v= 32 m/s
final velocity u= 0 m/s
acceleration a= 3.5m/s^2
<u>Required</u>
The distance covered upon the application of the brake
Step two:
we know that acceleration
a= v-u/t
t= v-u/a
t= (0-32)/3.5
t=32/3.5
t=9.14seconds
also, to find distance, we use s=d/t,
rearrange as d=s*t
d=32*9.14 s
d=292 m
Answer:
a) Clockwise
b) τ = 4.67 N-m
Explanation:
Given
m = 7 Kg
R = 17 cm = 0.17 m
μ = 0.4
We use the formula
τ = R*F*Sin ∅ = R*(μ*m*g)*Sin ∅
⇒ τ = (0.17 m)*(0.4*7 Kg*9.81 m/s²)*Sin 270° = - 4.67 N-m
(Clockwise)
Answer:
1.47*10^{-8}s
Explanation:
You first calculate the distance traveled by the electron:
Next, you calculate the relative speed as measure by an observer in the positron, of the electron:
with this relative velocity you calculate the time:
Answer:
E_aprox = 1.003 E_real
Explanation:
In this exercise we are given the expression for the electric field of a dipole in the axis direction of the dipole
E_real = k 2q d / √(z² + d²)³
I think your equation has some errors.
In this case they indicate that d is the separation of the charges of the dipole
in the case of z »d this equations approximates
E_aprox = k 2q d/ z³
calculate the value for the two cases
E_real = k2q d / √[ ((23d)² + d²)³]
E_real = k2q d / d³ 12201
E_real = k2q 1/12201 d²
E_aprox = k2q d / (23.00d)³
E_aprox = k2q 1/12167 d²
the error between these quantities is
E_aprox / E_real = 12201 d² / 12167 d²
E_aprox / E_real = 1.003
E_aprox = 1.003 E_real