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PIT_PIT [208]
3 years ago
10

What is the smallest unit of a substance that keeps all of the physical and chemical properties of that substance?

Physics
1 answer:
Sergio [31]3 years ago
5 0
Salutations!

What is the smallest unit of a substance that keeps all of the physical and chemical properties of that substance?

Molecules is the smallest unit of a substance that keeps all of the physical and chemical properties of that substance. It is a group of atoms bounded together, and it can participate in a chemical reaction/

Hope I helped (:

Have a great day!
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When two license plates are issued they need to be attached to the _________ of the vehicle they were issued for.
Sergio039 [100]

Answer:

Front and the rear bumpers.

Explanation:

When two license plates are issued they need to be attached to the Front and the rear bumpers of the vehicle they were issued for.

7 0
3 years ago
How much work is required to stop an electron (m = 9.11 \times 10^ - 31 kg) which is moving with a speed of 2.10
Karo-lina-s [1.5K]

Answer:

-2.00876\times 10^{-18}\ J

Explanation:

v = Speed of electron = 2.1\times 10^6\ m/s (generally the order of magnitude is 6)

m = Mass of electron = 9.11\times 10^{-31}\ kg

Work done would be done by

W=K_i-K_f\\\Rightarrow W=0-\dfrac{1}{2}mv^2\\\Rightarrow W=0-\dfrac{1}{2}\times 9.11\times 10^{-31}\times (2.1\times 10^6)^2\\\Rightarrow W=-2.00876\times 10^{-18}\ J

The work required to stop the electron is -2.00876\times 10^{-18}\ J

6 0
3 years ago
Suppose that a uniform electric field exists in a certain region of space. Now consider a mathematical plane surface of area A.
____ [38]

Answer: The normal of the plane must be parallel to the electric field vector.

Explanation:

the normal to the surface is defined as a versor that is perpendicular to the plane.

Now, if the angle between this normal and the line of the field is θ, we have that the flux can be written as:

Φ = E*A*cos(θ)

Where E is the field, A is the area and θ is the angle already defined.

Now, this maximizes when θ = 0.

This means that the normal of the surface must be parallel to the electric field

7 0
2 years ago
What is the relationshop between a pure substance and a mixture
ryzh [129]

The difference between a pure substance and a mixture is that mixtures are combinations of two or more pure substances, while pure substances cannot be separated into any other kinds of matter.

7 0
3 years ago
How long does it take light to reach us from the Sun, 1.53x108 km away? Give your answer in minutes.
muminat

Answer:

Sun light takes 8.5 minutes to reach Earth.

Explanation:

Light travels in vacuum at constant speed c= 3 \times 10 ^8 \cfrac ms, so we can find the time it takes to travel the given distance from Earth to Sun using a kinematic equation.

Finding the time it takes for Sun light to reach us.

Using the kinematic equation d = vt, we can solve for time t, which will give us

t = \cfrac dv

We can replace the equation with the given values, but before doing that, we need the values to be on SI units, thus the distance becomes

d= 1.53 \times 10^8 km \times \cfrac{1000 m}{1 km }\\d = 1.53 \times 10^{11} m

Replacing the values on the time equation give us

t = \cfrac{1.53 \times 10^{11} m}{3 \times 10^{8} \cfrac ms}\\t = 510 s

We get as result 510 seconds, then we must convert them in minutes.

t = 510 s \times \cfrac{1 min}{60s}\\\boxed{t = 8.5 min }

So we can conclude that Sun light takes 8.5 minutes to reach Earth.

7 0
2 years ago
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