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3 years ago

Plzzzzzzz help me quick

Physics

1 answer:

andrezito [222]3 years ago

3 0

Explanation:

in the first thing we are allowing bacteria to grow

in the second one we are killing it

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You have designed and constructed a solenoid to produce a magnetic field equal in magnitude to that of the Earth (5.0 10-5 T). I

saul85 [17]

Answer:

$I = 0.03637 A$

Explanation:

The given data in the question is

Magnetic field : $B = 5.0 \times 10^{-5} T$

Turns : $N = 350$

Length : $L = 32 cm = 0.32 m$

So, number of turns per unit length :

$n=\frac{N}{L}$

$n=\frac{350\: turns}{0.32 m}$

$n=1093.75 \: turns \: per \: meter$

If current is I , then magnetic field is given by

$B = \mu_{0} \times n \times I$

Also,

$I = \frac{B}{\mu_{0} \times n}$

Insert the values

$I = \frac{5.0 \times 10^{-5}}{4 \pi \times 10^{-7} \times 1093.75} A$

$I = 0.03637 A$

The current will be $I = 0.03637 A$

5 0

3 years ago

A solenoid of length 2.40 m and radius 1.70 cm carries a current of 0.190 A. Determine the magnitude of the magnetic field insid

Jlenok [28]

Complete question:

A solenoid of length 2.40 m and radius 1.70 cm carries a current of 0.190 A. Determine the magnitude of the magnetic field inside if the solenoid consists of 2100 turns of wire.

Answer:

The magnitude of the magnetic field inside the solenoid is 2.089 x 10⁻⁴ T.

Explanation:

Given;

length of solenoid, L = 2.4 m

radius of solenoid, R = 1.7 cm = 0.017 m

current in the solenoid, I = 0.19 A

number of turns of the solenoid, N = 2100 turns

The magnitude of the magnetic field inside the solenoid is given by;

B = μnI

Where;

μ is permeability of free space = 4π x 10⁻⁷ m/A

n is number of turns per length = N/L

I is current in the solenoid

B = μnI = μ(N/L)I

B = 4π x 10⁻⁷(2100 / 2.4)0.19

B = 4π x 10⁻⁷ (875) 0.19

B = 2.089 x 10⁻⁴ T

Therefore, the magnitude of the magnetic field inside the solenoid is 2.089 x 10⁻⁴ T.

3 0

3 years ago

What is the answer for this question?

svlad2 [7]

Electromagnetic waves can travel through a vacuum. Because they do not give up energy in traveling, Electromagnetic waves can cross the great distances that separate stars and galaxies. Rays from the Sun travel nearly 150 million kilometers to reach Earth's surface.

4 0

3 years ago

What is the weight of a person who has a mass of 76kg

nalin [4]

Answer:944.8N

Explanation:

mass=76kg

Acceleration due to gravity=9.8m/s^2

Weight=mass x acceleration due to gravity

Weight=76 x 9.8

Weight=944.8N

5 0

4 years ago

Water has a mass per mole of 18.0 g/mol, and each water mo- lecule (H2O) has 10 electrons. (a) How many electrons are there in o

kap26 [50]

Answer:

Part 1) Number of electrons in 1 liter of water equals $N=3.346\times 10^{26}$

Part 2) Net charge of all the electrons equals $Charge=53.61\times 10^{6}$

Explanation:

Since we know that the density of water is 1 kilogram per liter thus we infer that mass of 1 liter of water is 1 kilogram hence we need to find electron's in 1 kg of water.

Now since it is given that molar mass of water is 18.0 grams this means that 1 mole of water contains 18 grams of water.

Hence by ratio and proportion number of moles in 1 kg water equals

$n=\frac{1000}{18}$

Now by definition of mole we know that 1 mole of any substance is Avagadro Number of particles.

Hence the no of molecules in 'n' moles of water equals

$n'=\frac{1000}{18}\cdot N_a\\\\n'=\frac{1000}{18}\cdot 6.023\times 10^{23}\\[\tex][tex]\\n'=3.346\times 10^{25}$

Now since it is given that each molecule has 10 electron's thus the total number of electrons in n' molecules equals

$N=10\times 3.346\times 10^{25}\\\\N=3.346\times 10^{26}$

Part 2)

We know that charge of 1 electron equals $1.602\times 10^{-19}C$ the the charge of electrons in 'N' quantity equals

$Charge=1.6022\times 10^{-19}\times 3.346\times 10^{26}\\\\Charge=52.61\times 10^{6}Columbs$

4 0

3 years ago