Answer:
453.25 MJ
Explanation:
The formula to find kinetic energy is :
![E_{k} = \frac{1}{2} X m X v^{2}](https://tex.z-dn.net/?f=E_%7Bk%7D%20%3D%20%5Cfrac%7B1%7D%7B2%7D%20X%20m%20X%20v%5E%7B2%7D)
E.k = ?
m = 0.56kg
v = 25mi./s which needs to be converted into metres per second
1mi./s= 1609.34m/s
25 mi./s = 40233.6 m/s.
E.k. = 0.5 × 0.56 × 40233.6²
e.k = 453247919.3J
E.k.= 453.25 MJ
Answer:
A. 54.88m/s.
B. 153.66m
Explanation:
Data obtained from the question include:
Time (t) = 5.6 secs
A. Determination of the skydiver's downward velocity.
Time (t) = 5.6 secs
Acceleration due to gravity (g) = 9.8m/s²
Velocity (v) =..?
v = gt
v = 9.8 x 5.6
v = 54.88m/s
Therefore, the skydiver's downward velocity is 54.88m/s
B. Determination of the height below the helicopter.
Time (t) = 5.6 secs
Acceleration due to gravity (g) = 9.8m/s²
Height (H) =..?
H = ½gt²
H = ½ x 9.8 x 5.6²
H = 153.66m
Therefore, the height below the helicopter when the parachute opens is 153.66m.
<span>A very rare type of lightning that appears as a reddish-colored sphere is called </span>A + Ball Lightening
Electric field is defined as force per unit charge.
So it is given by
![F = q E](https://tex.z-dn.net/?f=F%20%3D%20q%20E)
now we can find electric field by
![E = \frac{F}{q}](https://tex.z-dn.net/?f=E%20%3D%20%5Cfrac%7BF%7D%7Bq%7D)
![E = \frac{4.5*10^{-4}}{6 * 10^{-4}}](https://tex.z-dn.net/?f=E%20%3D%20%5Cfrac%7B4.5%2A10%5E%7B-4%7D%7D%7B6%20%2A%2010%5E%7B-4%7D%7D)
![E = 0.75 N/C](https://tex.z-dn.net/?f=E%20%3D%200.75%20N%2FC)
So field strength is 0.75 N/C.
The only way of telling about dark energy is our observation of how the universe has been expanding. It basically works the opposite as gravity, pushing things away from it. Thus, the closest answer would be D. The shape of galaxies in cluster galaxies.