Answer:
0.39AU = 58344000 [km] or 58.500.000 [km]
Explanation:
This is a problem that consists simply in converting units:
AU = astronomic unit
![1 [AU] = 1.496*10^{8} [km]\\0.39 [AU] = x\\\\Therefore\\x = \frac{0.39*1.496*10^{8} }{1} \\x = 58344000[km]](https://tex.z-dn.net/?f=1%20%5BAU%5D%20%3D%201.496%2A10%5E%7B8%7D%20%5Bkm%5D%5C%5C0.39%20%5BAU%5D%20%3D%20x%5C%5C%5C%5CTherefore%5C%5Cx%20%3D%20%5Cfrac%7B0.39%2A1.496%2A10%5E%7B8%7D%20%7D%7B1%7D%20%5C%5Cx%20%3D%2058344000%5Bkm%5D)
Answer:
(d) 9 × 10^{3] J
Explanation:
from the question we are given the following:
weight of the man = 6.0 × 10 ^ {2} N
average speed (v) = 3 m/s
time (t) = 3 s
potential energy (U) = ?
We can calculate the increase in potential energy of the man by applying the formula below
increase in potential energy = P₂ - P₁
where
- P₁ is the initial potential energy
- P₂ is the final potential energy
- Potential energy = mass x acceleration due to gravity x height
From physic we know that weight = mass x acceleration due to gravity
- We should take note that the distance in this case is also our height, and we can get it from the formula distance = velocity x time
- Distance = 3 x 5 = 15 meters
- Initial potential energy P₁ is zero because the person was initially in motion and potential energy is the energy at rest.
therefore
potential energy = 6.0 × 10 ^ {2} × 15 = 9 × 10^{3] J
B. The sound of the engine will get louder and the pitch higher.
<span>I think it would kinetic energy which is the same as potentail energy</span>
