3 years ago

Help! xoxo thank you

Physics

1 answer:

mrs_skeptik [129]3 years ago

7 0

Like charges repel and opposite charges attract.

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How much of the electromagnetic spectrum is visible to us? A. All of it B. None of it C. Most of it D. A small part of it

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For plato users, I just took the test and D is your correct answer!

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3 years ago

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A flea jumps by exerting a force of 1.09 ✕ 10−5 N straight down on the ground. A breeze blowing on the flea parallel to the grou

patriot [66]

Answer:

a= 17.877 m/s² : Magnitude of the acceleration of the flea

β = 88.21° : Direction of the acceleration of the flea

Explanation:

Conceptual analysis

We apply Newton's second law:

∑F = m*a (Formula 1)

∑F : algebraic sum of the forces in Newton (N)

m : mass in kilograms (kg)

a : acceleration in meters over second square (m/s²)

Problem development

Look at the flea free body diagram in the attached graphic

The acceleration is presented in the direction of the resultant force (R) applied over the flea .

$R= \sqrt{(F_{x})^{2} + (F_{y})^{2} }$

$R= \sqrt{(10.9)^{2}+(0.340)^{2} } *10^{-6} N$

R= 10.905*10⁻⁶ N

We apply the formula (1) to calculate the magnitude of the acceleration of the flea

∑F = m*a m = 6.1 * 10⁻⁷ kg

R = m*a

a= R/m

a= (10.905*10⁻⁶) / (6.1 * 10⁻⁷ )

a= 17.877 m/s²

β: Direction and magnitude of the acceleration of the flea

$\beta = tan^{-1} (\frac{F_{y} }{F_{x} } )$

$\beta = tan^{-1} (\frac{10.9*10^{-6} }{0.340*10^{-6} } )$

β = 88.21°

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4 years ago

Convert: 8 mm: ____________ cm

vfiekz [6]

-1^10

centi=10 mm and mm=1/10=10^-1 cm

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When one person was talking in a small room, the sound intensity level was 60 dB everywhere within the room. Then, there were 14

dolphi86 [110]

Answer:

E= 71dB

Explanation:

See attached file for step by step calculation

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3 years ago

Which is a chemical property of iron? A. It forms iron oxide (rust) when exposed to moisture and air. B. It is a gray–black meta

krek1111 [17]

Answer:

Explanation:

it corrodes after repeated exposure to excess moisture and dry air the rust itself can be turned back into iron after melting it and removing the waste

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