Lakes and ice are the hydrosphere. Mountains and trees are the lithosphere. Clouds are the atmosphere. Snow is debatable, but I would say it fits in the atmosphere, since it generally flows through air, and isn't ever a permanent fixture on the planet's surface (lithosphere). While it is composed from water, it doesn't exist in or around the ocean for more than extremely brief periods, so it doesn't qualify for the hydrosphere. Ice is also debatable I suppose, but I took it to mean naturally occurring ice in glaciers, which constantly freeze and unfreeze in the ocean. Ice generally doesn't describe what we would consider "land", even if it forms the top layer of ground in many arctic and antarctic environments.
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Answer:
22.5 m
Explanation:
Using v² = u² - 2gy where u = initial velocity of BB = 21 m/s, v = final velocity of BB = 1 m/s (since this is the required speed of BB in which it will not harm the birds), g = acceleration due to gravity = 9.8 m/s² and y = minimum height of BB above the gun at which the birds may safely fly.
Substituting the values of the variables into the equation, we have
v² = u² - 2gy
(1 m/s)² = (21 m/s)² - 2(9.8 m/s²)y
collecting like terms, we have
(1 m/s)² - (21 m/s)² = - 2(9.8 m/s²)y
1 m²/s² - 441 m²/s² = -(19.6 m/s²)y
simplifying, we have
- 440 m²/s² = -(19.6 m/s²)y
dividing through by -19.6 m/s², we have
y = - 440 m²/s² ÷ -19.6 m/s²
y = 22.45 m
y ≅ 22.5 m
Answer:
54.4747649021
38.2003395586 rad/s
Explanation:
Acceleration
Distance covered
Number of revolutions
Number of revolutions is 54.4747649021
Angular speed is given by
The final angular speed is 38.2003395586 rad/s
Answer:
<h3>The answer is 2800 kg</h3>
Explanation:
The mass of the truck can be found by using the formula
f is the force
a is the acceleration
From the question we have
We have the final answer as
<h3>2800 kg</h3>
Hope this helps you
