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2 years ago

Is water a pollutant? Please help

1 answer:

6 0

No, water is the thing that gets pollutant, then again due to all the pollution in water it can cause to hurt others with the pollution

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A vector quantity has direction, a scalar quantity does not <br> true <br> or<br> false

Lina20 [59]

True a vector quantity has direction and a scalar quantity does not.

7 0

3 years ago

Read 2 more answers

A long wire carries a current density proportional to the distance from its center, J=(Jo/ro)•r, where Jo and ro are constants a

IgorC [24]

Answer:

$B = \mu_0(\frac{1}{3} \frac{J_0}{r_0} r^2)$

Explanation:

As the current density is given as

$J = \frac{J_0}{r_0}r$

now we have current inside wire given as

$i = \int J(2\pi r)dr$

$i = \int \frac{J_0}{r_0} r(2\pi r)dr$

$i = 2\pi \frac{J_0}{r_0} \int r^2 dr$

$i = \frac{2}{3} \pi \frac{J_0}{r_0} r^3$

Now by Ampere's law we will have

$\int B. dl = \mu_0 i$

$B. (2\pi r) = \mu_0(\frac{2}{3} \pi \frac{J_0}{r_0} r^3)$

$B = \mu_0(\frac{1}{3} \frac{J_0}{r_0} r^2)$

4 0

3 years ago

A string is stretched and fixed at both ends, 200 cm apart. If the density of the string is 0.015 g/cm, and its tension is 600 N

Gre4nikov [31]

Answer:

<h2>f₀ = 158.12 Hertz</h2>

Explanation:

The fundamental frequency of the string f₀ is expressed as f₀ = V/4L where V is the speed experienced by the string.

$V = \sqrt{\frac{T}{\mu} }$ where T is the tension in the string and $\mu$ is the density of the string

Given T = 600N and $\mu$ = 0.015 g/cm = 0.0015kg/m

$V = \sqrt{\frac{600}{0.0015} }\\ \\V = \sqrt{400,000}\\ \\V = 632.46m/s$

The next is to get the length L of the string. Since the string is stretched and fixed at both ends, 200 cm apart, then the length of the string in metres is 2m.

L = 2m

Substituting the derived values into the formula f₀ = V/2L

f₀ = 632.46/2(2)

f₀ = 632.46/4

f₀ = 158.12 Hertz

Hence the fundamental frequency of the string is 158.12 Hertz

5 0

3 years ago

according to Newton's __ law, an object with no net force acting on it remains at rest or in motion with a constant veloctiy

Pani-rosa [81]

Answer:

i think its his law of inertia

Explanation:

this law is about motion

5 0

2 years ago

a man is walking inside a bus which is travelling at 56.2 km/h.if the speed of the man relative to the ground is 55.8 km/h,is he

nlexa [21]

Answer:

rawr

Explanation:

6 0

2 years ago