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Tju [1.3M]
2 years ago
13

At constant temperature and pressure, gas volume is directly proportional to the

Physics
1 answer:
MAVERICK [17]2 years ago
4 0

Answer:

number of moles of gas.

Explanation:

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An electric field is described by the vector e=yj -xi. what is the electric flux through a rectangular box in the x-z plane that
Varvara68 [4.7K]

The flux of \vec E = -x\,\vec\imath + y\,\vec\jmath is given by the surface integral

\displaystyle \iint_S \vec E \cdot d\vec\sigma

where S is the given square region, which we can parameterize by

\vec s(x, z) = x\,\vec\imath + z\,\vec k

with 0\le x\le 1 and 0\le z\le 1. The area element is

d\vec\sigma = \vec n \, dx\,dz

where \vec n is the normal vector to S. Depending on the orientation of S, this vector could be

\vec n = \dfrac{\partial\vec s}{\partial x} \times \dfrac{\partial\vec s}{\partial z} = -\vec\jmath

or -\vec n = \vec \jmath; either way, the integral reduces to

\displaystyle \iint_S \vec E \cdot d\,\vec\sigma = \int_0^1 \int_0^1 (-x\,\vec\imath + z\,\vec k) \cdot (\pm\vec\jmath) \, dx\,dz = \boxed{0}

3 0
2 years ago
An ideal heat engine absorbs heat at 100°C and exhausts heat at 0°C. What is its percent efficiency?
vampirchik [111]

Answer:

26.8 %

Explanation:

TH = 100°C = 100 + 273 = 373 K

Tc = 0°C = 273 K

The efficiency of the heat engine is given by

\eta = 1-\frac{T_{c}}{T_{H}}

\eta = 1-\frac{273}{373}

η = 0.268

η = 26.8 %

Thus, the efficiency of the heat engine is 26.8 %.

6 0
3 years ago
A circuit connected to a battery of 1.9 voltage. has a current of 0.07 amps. What is the resistance
alexandr402 [8]

Answer:

27.14 ohms

Explanation:

V = IR

V/I  = R

1.9 v / .07 a = 27.14 ohms

5 0
3 years ago
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umka21 [38]
<span> </span>Most of the stars in the Milky Way will end their lives as white dwarfs
4 0
3 years ago
Read 2 more answers
A student has a small piece of steel.
Simora [160]

Answer:

There are different ways to investigate density. In this required practical activity, it is important to:

record the mass accurately

measure and observe the mass and the volume of the different objects

use appropriate apparatus and methods to measure volume and mass and use that to investigate density

Explanation:

5 0
3 years ago
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