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3 years ago

Which is most likey to contain brackish water?

Physics

2 answers:

AnnyKZ [126]3 years ago

7 0

the answer is Marshes

Luden [163]3 years ago

3 0

"Estuaries" <span> is most likely to contain brackish water

Hope this helps!</span>

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A 5.0-nC point charge is embedded at the center of a nonconducting sphere (radius = 2.0 cm) which has a charge of -8.0 nC distri

Blababa [14]

Answer:

3.6 × 10⁵ N/C = 360 kN/C

Explanation:

Let R = 2.0 cm be the radius of the sphere and q = -8.0 nC be the charge in it. Let q₁ be the charge at radius r = 1.0 cm. Since the charge is uniformly distributed, the volume charge density is constant. So, q/4πR³ = q₁/4πr³

q₁ = q(r/R)³. The electric field due to q₁ at r is E₁ = kq₁/r² = kq(r/R)³/r² = kqr/R³

The electric field due to the point charge q₂ = 5.0 nC is E₂ = kq₂/r².

So, the magnitude of the total electric field at r = 1.0 cm is

E = E₁ + E₂ = kqr/R³ + kq₂/r² = k(qr/R³ + q₂/r²)

E = 9 × 10⁹(-8 × 10⁻⁹ C × 1 × 10⁻² m/(2 × 10⁻² m)³ + 5 × 10⁻⁹ C/(1 × 10⁻² m)²)

E = 9 × 10⁹(-1 × 10⁻⁵ + 5 × 10⁻⁵)

E = 9 × 10⁹(4 × 10⁻⁵)

E = 36 × 10⁴ N/C = 3.6 × 10⁵ N/C = 360 kN/C

7 0

4 years ago

In the swing carousel amusement park ride, riders sit in chairs that are attached by a chain to a large rotating drum as shown i

irinina [24]

Answer: $\theta =44.068^{\circ}$

Explanation:

Given

time taken to complete the circle=7.9 s

radius of circle(r)=15 m

velocity of rider is given by $=\frac{2\pi r}{t}$

$v=\frac{2\pi 15}{7.9}=11.93 m/s$

Let us suppose T is the tension in the chain and $\theta$ is the angle which chain makes with vertical

Therefore $T\sin \theta =\frac{mv^2}{r}-1$

$T\cos \theta=mg$ --2

Divide 1 & 2 we get

$tan\theta =\frac{v^2}{rg}$

$tan\theta =0.968$

$\theta =44.068^{\circ}$

8 0

3 years ago

6. A skier starts from rest at the top of a frictionless incline of height 20.0 m. At

n200080 [17]

Explanation:

a. KE at bottom = PE at top

½ mv² = mgh

v = √(2gh)

v = √(2 × 9.8 m/s² × 20.0 m)

v = 19.8 m/s

b. Work by friction = PE at top

mgμ d = mgh

d = h / μ

d = 20.0 m / 0.210

d = 95.2 m

6 0

4 years ago

the sun is one hundred and fifty million kilometers away from earth write this in scientific notation

Viefleur [7K]

Answer: its 15 i think i hope this helps

Explanation:

As an example, the distance from Earth to the Sun is about 150,000,000,000 meters – a very large distance indeed. In scientific notation, the distance is written as 1.5 × 1011 m.

6 0

2 years ago

How can we search for evidence that other planets were once habitable?

Slav-nsk [51]

Answer:

Hey

Good question

How can we know if I planet was once inhabited by life? There diferent tequnecs for this. The first would be searching in the soil for fossilized microbes. in June of 19, 1976 Viking 1 was launched on its way to mars to began the search of life els wear. What this little lab did was drill a hole in the marsion terrain and take a sample of its soil to search for microbes or microbe fosles. Sadly it did not find anything. Other technics are to search for ruins on the planet or exoplanet. I do not have much to say about this method because it has never been used.

Hope it helped (i wrote all that).

Spiky Bob your answerer

Below is a picture of Carl Sagan next to the Viking Voyager 1. Obveosly this is just a modal. you could not breathe on mars.

4 0

3 years ago