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2 years ago

How does the nitrogen enter the food web?

1 answer:

6 0

When bacteria in the soil takes nitrogen from the air it becomes nitrates it can finally move through the food chain in this form.

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An Na ion has a charge of +1 and an O ion has a charge of –2. How many Na ions does one O ion need to balance charges

Aleonysh [2.5K]

Because Na⁺ ion lacks an electron and O²⁻ has two extra electrons extra, to balance the charge, we need 2 Na⁺ ions.

All ions, atoms and molecules want to get to the minimum energy state, and that state is when the ion, atom, or molecule is neutral, that's why all of them want to balance their charges.

7 0

2 years ago

Read 2 more answers

What is the magnetic flux density (B-field) at a distance of 0.36 m from a long, straight wire carrying a current of 3.8 A in ai

olga nikolaevna [1]

Answer:

The magnetic flux density is $2.11\times10^{-6}\ T$

Explanation:

Given that,

Distance = 0.36 m

Current = 3.8 A

We need to calculate the magnetic flux density

Using formula of magnetic field

$B =\dfrac{\mu_{0}I}{2r}$

Where,

r = radius

I = current

Put the value into the formula

$B =\dfrac{4\pi\times10^{-7}\times3.8}{2\times\pi\times0.36}$

$B=2.11\times10^{-6}\ T$

Hence, The magnetic flux density is $2.11\times10^{-6}\ T$

3 0

2 years ago

What factors cause a rock to become a sedimentary rock

erica [24]

Answer:

Water and sand

Explanation:

3 0

2 years ago

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An electron travels through a particular point in an experimental apparatus with a velocity of 0.949 \times 10^6×10 6 m/s an

Rzqust [24]

Answer:

The magnitude of the acceleration of the electron at this point is $3.94\times10^{14}\ m/s^2$ .

Explanation:

Given that,

Velocity $v= 0.949\times10^{6}\ m/s$

Angle = 61.5°

Magnetic field = 0.01 T

We need to calculate the magnetic force

Using formula of magnetic force

$F=Bev\cos\theta$

Where, B = magnetic field

v = velocity

e = charge of electron

Put the value into the formula

$F=0.01\times1.6\times10^{-19}\times0.949\times10^{6}\cos61.5$

$F=3.59\times10^{-16}\ N$

We need to calculate the acceleration

Using newton's second law

$F= ma$

$a = \dfrac{F}{m}$

Put the value into the formula

$a=\dfrac{3.59\times10^{-16}}{9.1\times10^{-31}}$

$a=3.94\times10^{14}\ m/s^2$

Hence, The magnitude of the acceleration of the electron at this point is $3.94\times10^{14}\ m/s^2$ .

5 0

2 years ago

A negative velocity, approaching zero, represents a negative acceleration. True or False

ruslelena [56]

Answer:

False.

Explanation:

Lets assume our positive direction to the right (this reasoning works for any direction). A negative velocity would then be then directed to the left. If it varies as such that it aproaches to zero, it means that the variation is directed to the right, and that is where the direction of the acceleration must be pointing. In other words, its losing its velocity, so the acceleration must point opposite to the velocity. Then it means the acceleration is positive.

8 0

2 years ago