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2 years ago

The first step in a star formation is ______?

Physics

2 answers:

Mariana [72]2 years ago

8 0

First look at the star

AleksandrR [38]2 years ago

8 0

Initial collapse of an interstellar cloud

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An electromagnetic wave is a kind of a wave which,

Harman [31]

Explanation:

Electromagnetic waves are waves that propagate through space while an electric field and a magnetic field interact with each other.

please mark as brainliest plzz

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1 year ago

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Where can radiation be found in nature and how is it affected

Murljashka [212]

The sun is a clear example of objects releasing radiation in nature

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1 year ago

Jenny was applying her makeup when she drove into the student parking lot last Friday morning . Unaware that Cheryl was stopped

Akimi4 [234]

Answer: F = 102141N

Explanation: Newton's 2nd Law states that a force can change the motion of a body. The relation is given by

F = m.a

whose units are:

[F] = N

[m] = kg

[a] = m/s²

Jenny's car, at the moment of the break, had acceleration:

$a=\frac{\Delta v}{\Delta t}$

$a=\frac{11}{0.14}$

a = 78.57 m/s²

Then, Force is

F = 1300*78.57

F = 102141 N

Jenny's car experienced a force of magnitude 102141N.

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2 years ago

If the frequency of a given wave increases,what happens to the wavelength?

Greeley [361]

It shortens so that the tips reach faster

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2 years ago

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A proton traveling with speed 2 × 105 m/s in the -y direction passes through a region in which there is a uniform magnetic field

stepladder [879]

Answer:

$\vec{E} = 1.2\times 10^5(-i)$

Explanation:

Given that

Speed ,v= 2 x 10⁵ m/s ( - y direction)

B= 0.6 T (- z direction)

The resultant force on the proton given as

$\vec{F}=q.\vec{E}+ q.(\vec{v}\times \vec{B})$

F= m a

For uniform motion acceleration should be zero.

F = 0

$0=q.\vec{E}+ q.(\vec{v}\times \vec{B})$

$0=\vec{E}+ (\vec{v}\times \vec{B})$

$0=\vec{E}+2\times 10^5(-j) \times 0.6(-k)$

$\vec{E} =- 2\times 10^5(-j) \times 0.6(-k)$

$\vec{E} =-1.2\times 10^5(i)$

$\vec{E} = 1.2\times 10^5(-i)$

Electric filed should be apply in the negative x direction.

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2 years ago