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3 years ago

Select all the correct answers.

Physics

2 answers:

crimeas [40]3 years ago

6 0

It keeps the solar wind from reaching earth

Maslowich3 years ago

3 0

Answer:

It keeps the solar wind from reaching Earth.

Explanation:

Solar Wind corresponds to the emission of particles from the solar corona. The mechanism by which the Solar Wind is formed is still not exactly known. So far, it is known that it consists of a plasma composed of electrons, protons and sub-particles like neutrinos. This plasma is composed of particles loaded with ionized atoms with greater weight and which undergo an acceleration caused by the thermonuclear reactions of the Sun, being then fired in all directions with high speeds, reaching approximately 400 km / s. When close to Earth, the particles can reach up to 800 km / s and have densities around 10 particles per cubic centimeter.

The evolution of the studies has already allowed the identification of some effects caused by the Solar Wind. The tails of comets have their orientation defined exactly due to the Solar Wind. Another registered effect is the change in planetary magnetic fields, because the magnetic field protects the planet against the effects of the solar wind, but ends up being damaged.

In addition, the Solar Wind also interferes with the propagation of radio waves, has an effect on the flight track of space vehicles and can directly influence the Earth's climate when solar flares are very violent.

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A meter stick is place in a very high-speed spaceship. What length would the astronauts say the meter stick was? What would the

Marysya12 [62]

Answer:

a) The astronauts would see the real length of the meter stick, i.e. L₀

b) The length of the meter stick as measured by the stationary observer will be $L = L_{0} }{\sqrt{(1-(\frac{v}{c} )^{2} } }$

Explanation:

a) Let the proper length of the meter stick be L₀

The meter stick and the astronauts on the on the space ship are on the same moving frame, therefore, they will see the exact length of the meter stick, that is, L₀

b) A stationary observer watching the space ship and meter stick travel past them will see a contracted length of the meter stick

The original length = L₀

Let the speed of the space ship = v

The contracted length, L, is related to the original length in the frame of rest by

L = L₀/γ......................(1)

Where γ = $\frac{1}{\sqrt{(1-(\frac{v}{c} )^{2} } }$ ....................(2)

Substituting equation (2) into (1)

$L = L_{0} }{\sqrt{(1-(\frac{v}{c} )^{2} } }$

4 0

3 years ago

Um objeto de 200 kg é acelerado a 4 m/s2 sob ação de uma força F. Determine a distância deslocada pelo objeto sob ação dessa for

AnnZ [28]

Answer:c

Explanation:

3 0

3 years ago

An open pipe is 1.42 m long

lora16 [44]

Answer:

the fundamental frequency produced by the open pipe is 120.78 Hz

Explanation:

Given;

length of the open pipe, L = 1.42 m

speed of sound in air, v = 343 m/s

The length of the open pipe for the fundamental frequency is equivalent to half of wavelength;

$L = \frac{\lambda}{2} \\\\\lambda = 2L$

The fundamental frequency produced by the open pipe is calculated as;

$f_o = \frac{v}{\lambda} \\\\f_o = \frac{v}{2L} \\\\f_o = \frac{343}{2 \times 1.42} \\\\f_o = 120.78 \ Hz$

Therefore, the fundamental frequency produced by the open pipe is 120.78 Hz

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3 years ago

What was the name of the first man made satellite launched by the Soviet Union in 1957.

OverLord2011 [107]

Answer:

In 1957 the Soviet union launched Sputnik , the first satellite in space...

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3 years ago

How deep is the outer core beneath the surface

sukhopar [10]

Precisely around 1,800 miles below.

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3 years ago