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defon
2 years ago
12

HELP ASAP!!

Physics
1 answer:
AveGali [126]2 years ago
5 0
It would be a) 2 electrons
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15 POINTS PLEASE HELP! NO GUESSING
torisob [31]
He answer is A. <span>encourage agricultural usage in the watershed

if you want to read it for yourself go to
www.nature.org/ourinitiatives/regions/northamerica/unitedstates/indiana/journeywithnature/watersheds...

hope this helps you!!</span>
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3 years ago
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An object at rest will ______ unless acted upon by an unbalanced force.
zvonat [6]

Answer:

It's C because if you were trying to put it at rest that means you would put it on a Balanced surfest

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2 years ago
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A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 80.0 m/s at ground level.
BARSIC [14]

Answer:

There is an interval of 24.28s in which the rocket is above the ground.

Explanation:

y_{i}=0m

v_i=80\frac{m}{s}

a=4\frac{m}{s^2}

y_{e}=1000m

g=9.8\frac{m}{s^2}

From Kinematics, the position y as a function of time when the engine still works will be:

y(t)=v_it+\frac{1}{2}at^2

At what time the altitud will be y_{e}=1000m?

v_it+\frac{1}{2}at^2=y_{e} ⇒ \frac{1}{2}at^2+v_it-y_{e}=0

Using the quadratic formula: t_1=10s.

How much time does it take for the rocket to touch the ground? No the function of position is:

y(t)=y_{e}+v_et-\frac{1}{2}gt^2

Where our new initial position is y_{max}, the velocity when the engine breaks is v_e=v_i+at=120\frac{m}{s} and the only acceleration comes from gravity (which points down).

Now, when the rocket tounches the ground:

y_{e}+v_et-\frac{1}{2}gt^2=0

Again, using the quadratic ecuation:

t_2=24.49s

Now, the total time from the moment it takes off and the moment it tounches the ground will be:

t_T=t_1+t_2=34.49s.

6 0
3 years ago
A pendulum that has a period of 2.67000 s and that is located where the acceleration due to gravity is 9.77 m/s2 is moved to a l
zalisa [80]

Answer:

Explanation:

Expression for time period of pendulum is given as follows

T=2\pi\sqrt{\frac{l}{g} }

where l is length of pendulum and g is acceleration due to gravity .

Putting the given values for first place

2.67=2\pi\sqrt{\frac{l}{9.77} }

Putting the values for second place

T=2\pi\sqrt{\frac{l}{9.81} }

Dividing these two equation

\frac{T}{2.67} =\sqrt{\frac{9.77}{9.81} }

T = 2.66455 s.

5 0
3 years ago
In nineteenth century, physical science was divided into discipline. . ​
dem82 [27]

Answer:

Here! Try this Website!: www.britannica.com › science › physical-science physical science | Definition, History, & Topics | Britannica. So you will learn a lot more about science, history, and topics about it!

8 0
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