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3 years ago

URGENT!!!

Physics

1 answer:

Rama09 [41]3 years ago

6 0

The amount of NOx emission produced by a household is required.

The total amount of NOx the household is responsible for is 91.06 kg.

1 car produces 11 kg of NOx per year.

Natural gas burning produces 4.3 g of NOx per therm.

Electric power plant produces 7.1 g of NOx per kwh.

2 cars will produce $2\times 11=22\ \text{kg}$ of NOx.

1200 therms of natural gas will produce $1200\times 4.3=5160\ \text{g}$

9000 kWh will produce $7.1\times 9000=63900\ \text{g}$

Converting all to kg and finding the total amount

$22+5.16+63.9=91.06\ \text{kg}$

The total amount of NOx the household is responsible for is 91.06 kg.

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Answer

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3 years ago

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. A huge pile of leaves was wrapped in a tarp in the middle of a lawn. The wrapped leaves weigh 580 newtons. The coefficient of

Rina8888 [55]

The force required is 319 N

Explanation:

The force of static friction is a force that acts an object on a surface, when this object is pushed by another force to put it in motion. The direction of the force of friction is opposite to the direction of the force of push, and its value increases as the force of push increases, up to a maximum value given by:

$F_f = \mu W$

where

$\mu$ is the coefficient of friction

W is the weight of the object

Therefore, in order to put the object in motion, the force applied must be greater than this value.

For the pile of leaves in this problem, we have:

$\mu = 0.55$ (coefficient of friction)

$W=580 N$ (weight of the leaves)

Substituting, we find:

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4 years ago

An electron and a proton are each placed at rest in an electric field of 500 N/C. Calculate the speed (and indicate the directio

Bumek [7]

Answer:

For proton: 2592 m/s In the same direction of electric field.

For electron: 4752000 m/s In the opposite direction of electric field.

Explanation:

E = 500 N/C, t = 54 ns = 54 x 10^-9 s,

Acceleration = Force /mass

Acceleration of proton, ap = q E / mp

ap = (1.6 x 10^-19 x 500) / (1.67 x 10^-27) = 4.8 x 10^10 m/s^2

Acceleration of electron, ae = q E / me

ae = (1.6 x 10^-19 x 500) / (9.1 x 10^-31) = 8.8 x 10^13 m/s^2

For proton:

u = 0, ap = 4.8 x 10^10 m/s^2, t = 54 x 10^-9 s

use first equation of motion

v = u + at

vp = 0 + 4.8 x 10^10 x 54 x 10^-9 = 2592 m/s In the same direction of electric field.

For electron:

u = 0, ae = 8.8 x 10^13 m/s^2, t = 54 x 10^-9 s

use first equation of motion

v = u + at

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4 years ago

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Oksanka [162]

Answer:

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