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quester [9]
3 years ago
15

What discovery led J.J. Thomson to decide that atoms were not indivisible, but are actually composed of smaller parts? Thomson u

sed a scanning tunneling micrograph to capture images of atoms. Thomson used a beam of negatively charged particles. Thomson used only the experimental results of other scientists
Physics
2 answers:
Arada [10]3 years ago
8 0

Answer:

Thomson used a beam of negatively charged particles. Explanation: It was on a test i got it right.

gogolik [260]3 years ago
3 0

Answer:

Thomson used a beam of negatively charged particles. Explanation: It was on a test i got it right.

Explanation:

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question how does the gravitational field gx at the surface of planet x compare with the gravitational field gy at the surface o
siniylev [52]

The  gravitational field gx at the surface of planet x  (M/m)(r/R)² times the gravitational field gy at the surface of planet y.

<h3>What is gravitational field?</h3>

A gravitational field, as defined by physics, is the influence a massive body has on the area surrounding it, exerting a force on another huge body. In other words, a gravitational field, which is measured in newtons per kilograms (N/kg), aids in the explanation of gravitational field.

Now, Let planet x has mass M and radius R:  then gravitational field at the surface of planet: gₓ = GM/R².

Let planet y has mass m and radius r:  then gravitational field at the surface of planet: g_y = Gm/r².

Hence, gₓ/g_y = (M/m)(r/R)².

So, the  gravitational field gx at the surface of planet x  (M/m)(r/R)² times the gravitational field gy at the surface of planet y.

Learn more about gravitational field here:

brainly.com/question/12324569

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8 0
2 years ago
A 259-kV power transmission line carrying 429 A is hung from grounded metal towers by ceramic insulators, each having a 0.71×109
ella [17]

Answer:

The resistance is 7.47\times10^{6}\ \Omega.

Explanation:

Given that,

Power = 259 kV

Current = 429 A

Resistance R=0.71\times10^{9}\ Omega

We need to calculate the current in each insulator

Using formula of current

I=\dfrac{P}{R}

Put the value into the formula

I=\dfrac{259\times10^{3}}{0.71\times10^{9}}

I=3.64\times10^{-4}\ A

So all 95 insulators are in parallel

We need to calculate the resistance

Using formula of resistance

\dfrac{1}{R}=\sum_{i=1}^{95}\dfrac{1}{R_{i}}

Put the value into the formula

\dfrac{1}{R}=\dfrac{95}{0.71\times10^{9}}

\dfrac{1}{R}=1.338\times10^{-7}

R=\dfrac{1}{1.338\times10^{-7}}

R=7473841.5=7.47\times10^{6}\ \Omega

Hence, The resistance is 7.47\times10^{6}\ \Omega.

8 0
3 years ago
If a car drives 10 mph South, this is an example of a:
nekit [7.7K]

Answer:

杰杰伊杜杜杜伊格富尔杰迪耶赫分离福音

Explanation:

莱德利 · 赫耶尔伊 3uritievrirjrirhruebwkwieheoo2hfjcbvi3hd

4 0
3 years ago
Read 2 more answers
Is this a chemical or physical change
Mumz [18]
Good question.  if it's a physical change what you would see is a change in the physical object/appearance like let's say I Tear a piece of paper, that would be a Physical change.  I believe your answer would be a chemical change.  
4 0
3 years ago
Need answer ASAP!!!
Alina [70]

Hello!

Use <u>ohm law:</u>

I = V / R

Replacing:

I = 100 V / 20 O

I = 5 A

The current is <u>5 amperes.</u>

5 0
3 years ago
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