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Nastasia [14]
3 years ago
8

I beg you plz help me asap!!!

Physics
2 answers:
Strike441 [17]3 years ago
8 0

Answer:

a.

Explanation:

there would be a new planet is our solar system which could cause different gravitation pull on all the planets also there could be possible be new life form or other valuable metals that haven't been discovered on this planet. hope this helps somewhat

Dimas [21]3 years ago
6 0
Well, considering there's countless planets out there that haven't been discovered on top of the ones that have been, it definitely changes our understanding of the universe by showing that there's more out there to explore and the fact that conditions in space support a lot more planets than previously thought I'm sure.
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Used for measurement of physical quantity is called the unit of that<br> quantity
nalin [4]

Answer:

Unit

Explanation:

The reference standard used for the measurement of physical quantity is called the unit of that quantity.

Most units follow an agreed system of expressing quantities across all instances of such quantity.

  • It is necessary to standardized units because it makes comparison easier.
  • It also makes scientific communication easily discernible.
3 0
3 years ago
To make salt water a heterogeneous mixture, you would have to A) add sand. B) add a small amount of sugar. C) boil the water. D)
satela [25.4K]
To make salt water a heterogeneous mixture, you would have to add sand and that's is how to make a salt water with heterogeneous mixture.
A is correct answer.
Hope it helped you.

-Charlie

Thanks!

-:)
5 0
4 years ago
Read 2 more answers
A cannon fires a 0.2 kg shell with initial velocity vi = 9.2 m/s in the direction θ = 46 ◦ above the horizontal. The shell’s tra
Sedbober [7]

Answer:

∆h = 0.071 m

Explanation:

I rename angle (θ) = angle(α)

First we are going to write two important equations to solve this problem :

Vy(t) and y(t)

We start by decomposing the speed in the direction ''y''

sin(\alpha) = \frac{Vyi}{Vi}

Vyi = Vi.sin(\alpha ) = 9.2 \frac{m}{s} .sin(46) = 6.62 \frac{m}{s}

Vy in this problem will follow this equation =

Vy(t) = Vyi -g.t

where g is the gravity acceleration

Vy(t) = Vyi - g.t= 6.62 \frac{m}{s} - (9.8\frac{m}{s^{2} }) .t

This is equation (1)

For Y(t) :

Y(t)=Yi+Vyi.t-\frac{g.t^{2} }{2}

We suppose yi = 0

Y(t) = Yi +Vyi.t-\frac{g.t^{2} }{2} = 6.62 \frac{m}{s} .t- 4.9\frac{m}{s^{2} } .t^{2}

This is equation (2)

We need the time in which Vy = 0 m/s so we use (1)

Vy (t) = 0\\0=6.62 \frac{m}{s} - 9.8 \frac{m}{s^{2} } .t\\t= 0.675 s

So in t = 0.675 s  → Vy = 0. Now we calculate the y in which this happen using (2)

Y(0.675s) = 6.62\frac{m}{s}.(0.675s)-4.9 \frac{m}{s^{2} }  .(0.675s)^{2} \\Y(0.675s) =2.236 m

2.236 m is the maximum height from the shell (in which Vy=0 m/s)

Let's calculate now the height for t = 0.555 s

Y(0.555s)= 6.62 \frac{m}{s} .(0.555s)-4.9\frac{m}{s^{2} } .(0.555s)^{2} \\Y(0.555s) = 2.165m

The height asked is

∆h = 2.236 m - 2.165 m = 0.071 m

6 0
4 years ago
Good afternoon.....from bangladesh....
Step2247 [10]

Answer:

good afternoon

Explanation:

4 0
3 years ago
Read 2 more answers
A pot of water is heated on an electric stove top and begins to boil. Which
Leto [7]

Answer:

A and C. UvU

Explanation:

i know science :D

8 0
3 years ago
Read 2 more answers
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