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4 years ago

1. Go onto the Newsround website or article

Physics

2 answers:

poizon [28]4 years ago

5 0

Answer:

I read the article - the story was really sad.

Explanation:

- sincerelynini

Alecsey [184]4 years ago

4 0

I cant find a article with that name? Are you sure its right?

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Why are power cords coated with a material that has different physical properties than the wire inside?

Sergeeva-Olga [200]

Power cords are conductors and are covered by insulators. If they were not, then it would be easy to create a short-circuit. It would also be not safe, as a person touching the bare wires would be electricuted.

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3 years ago

Bill is farsighted and has a near point located 119 cm from his eyes. Anne is also farsighted, but her near point is 70.0 cm fro

Gennadij [26K]

Answer:

Explanation:

For Bill's glasses)

d_o=25 cm-2 cm=23.2 cm

d_i=129 cm-2 cm=127 cm

We know that

$1 / f = 1 / d_o + 1 / d_i
$

$f=(1 / d_o + 1 / d_i)^-1
$

so plug the numbers in

$f = (1 / (23) + 1 / (127))^-1
$

= 28.08 cm

For Anna's glasses)

d_o=25 cm-2 cm=23 cm

d_i=70.0 cm-2 cm=68 cm

Same thing

$(1 / f = 1 / d_o + 1 / d_i
)$

$f=(1 / do + 1 / di)^-1
$

so plug the numbers in

$f = (1 / (23) + 1 / (68))^-1
$

= 17.21 cm

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3 years ago

What are some challenges of scuba diving

bearhunter [10]

Time limit, due to Oxygen
Dangerous aquatic creatures

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3 years ago

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Relate the structure of water to its ability to act as a solvent

pishuonlain [190]

Explanation:

Water (H2O) as a polar covalent molecule has its arrangement of oxygen and hydrogen atoms where one end (hydrogen) has a partially positive charge while the other side (oxygen) had a partially negative charge.

It is also capable of forming hydrogen bonds with polar molecules. Each water molecule can form two hydrogen bonds involving their hydrogen atoms and two further hydrogen bonds using the hydrogen atoms attached to neighboring water molecules.

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3 years ago

A runner taking part in the 200-m dash must run around the end of a track that has a circular arc with a radius of curvature of

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Answer: $2.27\ m/s^2$