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2 years ago

HELP DUE 3 MINUTESsssss

Physics

2 answers:

Natalka [10]2 years ago

8 0

Answer:

pretty sure its d

Explanation:

bixtya [17]2 years ago

7 0

I think oxygen

I hope this helps

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What is the rarefaction of a longitudinal

Softa [21]

The answer Is B! Good luck

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2 years ago

It is proposed that a spaceship might be propelled in the solar system by radiation pressure, using a large sail made of foil. W

Anvisha [2.4K]

Answer:

962291.57928 m²

Explanation:

$P_r$ = Pressure = $2\dfrac{I}{c}$ (full reflection)

I = Intensity = $\dfrac{P}{A}=\dfrac{P}{4\pi r^2}$

P = Power = $3.9\times 10^{26}\ W$

c = Speed of light = $3\times 10^8\ m/s$

M = Mass of Sun = $1.99\times 10^{30}\ kg$

m = Mass of ship = 1500 kg

G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²

Force of radiation is given by

$F_r=P_rA\\\Rightarrow F_r=2\dfrac{I}{c}\times A\\\Rightarrow F_r=2\dfrac{P}{4\pi r^2c} A$

This force will balance the gravitational force as stated in the question

$\dfrac{GMm}{r^2}=2\dfrac{P}{4\pi r^2c} A\\\Rightarrow A=\dfrac{4\pi cGMm}{2P}\\\Rightarrow A=\dfrac{4\times \pi\times 3\times 10^8\times 6.67\times 10^{-11}\times 1.99\times 10^{30}\times 1500}{2\times 3.9\times 10^{26}}\\\Rightarrow A=962291.57928\ m^2$

The area of the must be 962291.57928 m²

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3 years ago

Which of the following statements about iron filings placed upon glass resting on top of a bar magnet is false?

leva [86]

The answer would be D. Because the iron fillings are attracted to the magnet underneath the glass.

5 0

2 years ago

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What does this indicate about the claim?

Anton [14]

claim

[klām]

VERB

state or assert that something is the case, typically without providing evidence or proof.

"he claimed that he came from a wealthy, educated family" · [more]

synonyms:

assert · declare · profess · maintain · state · hold · affirm · avow · aver · [more]

NOUN

an assertion of the truth of something, typically one that is disputed or in doubt.

"he was dogged by the claim that he had CIA links" · [more]

synonyms:

assertion · declaration · profession · affirmation · avowal · averment · protestation · representation · contention · submission · case · allegation · pretense · asseveration

a demand or request for something considered one's due.

"the court had denied their claims to asylum"

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3 years ago

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Second and third class levers are differentiated by __________. a. the location of the fulcrum b. the location of the load c. th

strojnjashka [21]

Answer:

the answer is b

Explanation:

Second and third class levers are differentiated by the location of the load.

Hope this help you out and have a nice day =)

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2 years ago