Answer:
a) V ≈ 125 m/s; b) Δt = 13.24 s; c) ΔS ≈ 1450 m
Explanation:
a) We have just to calculate the vector resultant.
V² = 106² + 66.2²
V² = 15618.44
V ≈ 125 m/s
b) The time of flight is equal to the time to reach the maximum height summed to the time to reach the land.
In vertical:
V = V₀ + a * t
V = 66.2 - g * t
0 = 66.2 - 9.8 * t
t ≈ 6.76 s
So: Δt = 13.24 s
c) In horizontal:
V = ΔS / Δt
106 = ΔS / 13.52 ⇒ ΔS = 106 * 13.52
ΔS = 106 * 13.52
ΔS = 1433,12
ΔS ≈ 1450 m
Well, if the position is <u> x(t) = 2t² + 3t - 5</u>
then the speed is x ' (t) = 4t + 3 (first derivative of 'x' wrt 't')
and the acceleration is x ' ' (t) = 4 (second derivative of 'x' wrt 't')
Apparently, then, the acceleration is constant, and is not a function of time.
After 2.7 seconds or 2.7 years, the acceleration is 4 .
Force = (mass) x (acceleration)
Force = (1.8) x (4)
<em>Force = 7.2 newtons </em>
Answer:
All halogens have the same NUMBER OF VALENCE ELECTRON
The group pf periodic table is based on their valence electron
Hope this is correct and helpful
HAVE A GOOD DAY!
Answer:
Explanation:
A ) The spheres are non conducting , charge will not move on the surface so neutralization of charge by + ve and - ve charge is not possible. Charges will remain intact on them . The electric field inside them will be zero . Electric field outside shell will not be spherically symmetrical . Lines of force will emanate from the surface of positively charged shell outwardly oriented and end at negatively charged shell .
B )
distance between the centres of spherical shell
= 2 a
potential energy of charges
= k q₁ x q₂ / R
= k x - Q x Q / ( 2a )
= - k Q²/ 2a
So work needed to separate them to infinity will be equal to
= k Q²/ 2a
Answer: unless it's acted upon by an external force
Explanation: Newton first law of motion State that an object will continue in it state of rest or in motion, unless it is been acted upon by an external force
