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3 years ago

The small particles that produce a streak of light upon entering earth’s atmosphere are called

Physics

2 answers:

iris [78.8K]3 years ago

8 0

They are called meteors... i just took the test

Afina-wow [57]3 years ago

3 0

Explanation:

When a meteoroid enters the earth's atmosphere at high speed, a streak of light called meteor is observed. This light effect is produced by the ionization of air molecules in the upper atmosphere (at altitudes from 76 to 100 km). Most of these are the size of a grain of sand.

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A chair of weight 125 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 3

iris [78.8K]

Answer:

N = 148.10N

Explanation:

GIVEN

Weight =125 N

force = 35

angle =42°

since there is no vertical acceleration $a_{y} = 0$ from

free body diagram

$\Sigma fa_{y} = ma_{y} = 0$

$N-W-Fsin42\degree = 0\\\\N= W+Fsin42\\N = 125+35\times 0.66\\N = 148.10 N$

5 0

4 years ago

One method of determining the location of the center of gravity of a person is to weigh the person as he/she lies on a board of

andrey2020 [161]

Answer:

x = 1.018 m

Explanation:

given,

height of man = 190 cm

= 1.9 m

scale reading on left = 450 N

scale reading on the right = 390 N

Let center of gravity of man be x distance from feet, feet is on right side.

For system to be in equilibrium moment about center should be equal to zero.

∑M = 0

now,

450(1.9 - x ) - 390 × x = 0

450(1.9 - x ) = 390 × x

855 - 450 x = 390 x

840 x = 855

$x = \dfrac{855}{840}$

x = 1.018 m

hence, point of center of gravity from feet is equal to x = 1.018 m

7 0

4 years ago

the natural process where the sun's energy is trapped by the atmosphere to make the earth warm enough for life is known as globa

alexira [117]

The natural process is called greenhouse effect. This is when the Sun's light enters the Earth, and converts to heat. Light passes through the Earth's atmosphere much easier compared to heat. Because of this, heat is trapped on Earth because it cannot exit the atmosphere as easily as light does.

6 0

4 years ago

As wavelength increase, the frequency of the wave increases / decreases.

Sveta_85 [38]

Answer:

Hey heres your ans

Explanation:

Wavelength will increase

6 0

3 years ago

What is convection ?

bagirrra123 [75]

Convection is the rise of hot air and the drop of cold air due to a large amount of molecules being moved usually in gas form.\

Hope this helps!

5 0

4 years ago

Read 2 more answers