Answer:
Explanation:
Given
acceleration of rocket(a)
At h=1000 m rocket burn out



(b) time to reach v=100 m/s
v=u+at


(c)Rocket maximum altitude

here u=100 m/s
v=0



[tex]s=510.204
Therefore maximum altitude=510.204+1000=1510.204 m
Answer:
b. during the final stages of cooling, a lava flow contracts, forming tall polygonal fractures
Explanation:
The columnar joints are very interesting and attractive for the eye geological features. They are not very common feature which makes them even more interesting. Some of them have been covered by sediments so they are hidden below the surface, but some have remained above the surface, sticking out as the erosion acts much slower on them than the surrounding area. They form when the lava cools off very quickly at its final stages, thus starting to contract, and instead of being smooth, they become polygonal fractures that are very tall.
Answer:
Explanation:
V₀ = 0 m/s
V = 41 m/s
S = 480 m
___________
a - ?
Distance traveled:
S = (V² - V₀²) / (2*a)
Acceleration :
a = (V² - V₀²) / (2*S)
a = (41² - 0²) / (2*480) = 1.75 m/s²
Answer:
The Hubble telescope,which is taking detailed pictures of the universe.
Explanation:
The frequency of the wave has not changed.
In fact, the frequency of a wave is given by:

where v is the wave's speed and
is the wavelength.
Applying the formula:
- In air, the frequency of the wave is:

- underwater, the frequency of the wave is:

So, the frequency has not changed.