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Angelina_Jolie [31]

3 years ago

14

Which accurately completes the statement? Conduction involves the transfer of electric charge or due to the movement of particle

s. O thermal energy Olight waves O protons o neutrons

2 answers:

wolverine [178]3 years ago

7 0

Answer:

A: thermal energy

ale4655 [162]3 years ago

5 0

Answer:

A-thermal energy

Explanation:

got it right in the test

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If you know how much radioactive material the organism had to begin with, explain how you could use half-life to determine its a

TiliK225 [7]

Answer: We can calculate it with the radioactive half life equation

Explanation:

If we already know the initial amount of radioactive material and its half life, we can leave that material for a specific known time and then measure how much of the material is left (since it follows the radioactive deacay) and use the results in the following formula:

$A=A_{o}.2^{\frac{-t}{h}}$

Where:

$A$ is the final amount of the material

$A_{o}$ is the initial amount of the material

$t$ is the time elapsed

$h$ is the half life of the radioactive compound

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3 years ago

(1 point) Answer the following questions about the sphere whose equation is given by x2+y2+z2−4x+4y=73. x2+y2+z2−4x+4y=73. 1. Fi

pychu [463]

Answer:

R=9.

C=(2,-2,0).

Explanation:

Lets try to find how $x^2+y^2+z^2-4x+4y=73$ can be written in the form of $(x-a)^2+(x-b)^2+(x-c)^2=R^2$ , since then its radius R and center of coordinates C=(a,b,c) would be easily recognizable.

Since we have the terms -4x and +4y, they seem to have come from the terms $(x-2)^2$ and $(y+2)^2$ , and we would need to take care of the extra +4 by substracting then. More explicitly:

$(x-2)^2-4=x^2-4x+4-4=x^2-4x$ , as we had originally with the x terms

$(y+2)^2-4=y^2+4y+4-4=y^2+4y$ , as we had originally with the y terms

Which means:

$x^2-4x+y^2+4y+z^2=(x-2)^2-4+(y+2)^2-4+z^2$

Or, putting all together:

$(x-2)^2-4+(y+2)^2-4+z^2=73$

$(x-2)^2+(y+2)^2+z^2=9^2$

So our radius is 9 and the center is (2,-2,0).

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3 years ago

A load of 25 kg is applied to the lower end and of a steal wire of length 25 m and thickness 3.0mm .The other end of wire is sus

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Answer:

the weight of the wire + 25kg

Explanation:

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Which planet spins the slowest in our solar system?

Kipish [7]

Answer: Venus

Explanation: Venus is the slowest revolving planet in our solar system, rotating once every 243 days, making.

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The acceleration of a vertically thrown ball at the top of its path is?

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