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sweet [91]
3 years ago
10

6. The transfer of thermal energy by radiation does not require matter. O True O False

Physics
1 answer:
lyudmila [28]3 years ago
6 0

Answer:false

Explanation:

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Average velocity is different than average speed because calculating average velocity involves
ANTONII [103]

Average velocity is different than average speed because calculating average velocity involves  considering the direction the bodies are moving.

When calculating average speeds you don't have to consider directions of the bodies.

This is because velocity is a vector quantity which must be defined by direction. Speed is a scalar quantity thus it does not have to be defined by direction.

6 0
3 years ago
Read 2 more answers
Longitude lines are not ____________________________ like latitude lines.
vekshin1
They are not parallel like latitude lines.  They meet at the poles, but latitude lines never meet
6 0
3 years ago
2) Escribir en notación común
LenKa [72]

Answer:

c nLKDCnasndasjasndasjdnaslkjdnsakjdnasjdnaklsjdkjlasndjlkasndnjasdasd

Explanation:

7 0
3 years ago
Why don’t we feel the gravitational force of a large object such as a skyscraper semi-truck?
Kobotan [32]

Answer:

Se the explanation below

Explanation:

We do not feel these forces of these bodies, because they are very small compared to the force of Earth's attraction. Although its mass is greater than that of a human being, its mass is not compared to the Earth's mass. In order to understand this problem we will use numerical data and the universal gravitation formula, to give validity to the explanation.

<u>Force exerted by the Earth on a human being</u>

<u />

F=G*\frac{m_{1}*m_{2}}{r^2}

Where:

G = universal gravitation constant = 6.673*10^-11 [N*m^2/kg^2]

m1 = mass of the person = 80 [kg]

m2 = mass of the earth 5.97*10^24[kg]

r = distance from the center of the earth to the surface or earth radius = 6371 *10^3 [m]

<u />

Now replacing we have

F = 6.673*10^{-11} *\frac{80*5.97*10^{24}}{(6371*10^{3})^{2}  } \\F = 785[N]

<u>Force exerted by a building on a human being</u>

<u />

Where:

G = universal gravitation constant = 6.673*10^-11 [N*m^2/kg^2]

m1 = mass of the person = 80 [kg]

m2 = mass of the earth 300000 [ton] = 300 *10^6[kg]

r = distance from the building to the person = 2[m]

F = 6.673*10^{-11}*\frac{80*300*10^6}{2^{2} }  \\F= 0.4 [N]

As we can see the force exerted by the Earth is 2000 times greater than that exerted by a building with the proposed data.

8 0
3 years ago
An object accelerates from rest to 85m/s over a distance of 36m. What acceleration did it experience?
Marizza181 [45]
Suvat
we have s, u, v and we want a
the suvat equation with these values in is: v^2 = u^2 - 2as
so a = (-v^2 + u^2)/-2s 
plug numbers in
a = (-85^2 + 0^2)/-2*36 = 7225/72 = 100.3... ms^-2
6 0
3 years ago
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