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Dennis_Churaev [7]
3 years ago
7

What role do plants serve in the oxygen cycle

Physics
1 answer:
kodGreya [7K]3 years ago
4 0
Plants,such as trees poduce oxygen to help animals like insects or humans can bresth snd surviave.
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When objects are charged by _______, they do not need to touch each other.
Deffense [45]
C because conduction you don’t need to touch anything
6 0
3 years ago
Newton's third law says that for every action force there is a reaction force which is
olga nikolaevna [1]
A. Equal and opposite For every action, there is an equal and opposite reaction
4 0
3 years ago
A cannonball is fired vertically upwards at 100.0 m/s a) How long will it take to return to the cannon? b) what is it's maximum
V125BC [204]
Answer:
a) 20s
b) 500m

Explanation:
Given the initial velocity = 100 m/s, acceleration = -10m/s^2 (since it is moving up, acceleration is negative), and at the maximum height, the ball is not moving so final velocity = 0 m/s.

To find time, we apply the UARM formula:

v final = (a x t) + v initial

Replacing the values gives us:

0 = (-10 x t) + 100

-100 = -10t

t = 10s

It takes 10s for the the ball to reach its max height, but it must also go down so it takes 2 trips, once going up and then another one going down, both of which take the same time to occur

So 10s going up and another 10s going down:

10x2 = 20s

b) Now that we have v final = 0, v initial = 100, a = -10, t = 10s (10s because maximum displacement means the displacement from the ground to the max height) we can easily find the displacement by applying the second formula of UARM:

Δy = (1/2)(a)(t^2) + (v initial)(t)

Replacing the values gives us:

Δy = (1/2)(-10)(10^2) + (100)(10)

= (-5)(100) + 1000

= -500 + 1000

= 500 m

Hope this helps, brainliest would be appreciated :)
7 0
2 years ago
You travel an an average speed of 20 km/h in a straight line to get to your grandmothers house. It takes you 3 hours to get to h
Ber [7]
20km every 1 hr is what 20km/hr means.

so 3hrs is 20km*3=60km.
6 0
3 years ago
Please I need the answer right now will mark you brainliest ​
Dmitrij [34]

Answer:

Explanation:

what do u need help with

3 0
2 years ago
Read 2 more answers
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