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malfutka [58]
4 years ago
15

Our sun has a low absolute magnitude compared to many other stars but appears very bright to us because of its

Physics
1 answer:
nadya68 [22]4 years ago
6 0

relative closeness to earth

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What parts of an atom determines which element it is?
uysha [10]

Explanation:

The protons determines the atomic number which helps in identifying an atom of an element

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A particle of mass m= 2.5 kg has velocity of v = 2 i m/s, when it is at the origin (0,0). Determine the z- component of the angu
melomori [17]

Answer:

please read the answer below

Explanation:

The angular momentum is given by

|\vec{L}|=|\vec{r}\ X \ \vec{p}|=m(rvsin\theta)

By taking into account the angles between the vectors r and v in each case we obtain:

a)

v=(2,0)

r=(0,1)

angle = 90°

L=(2.5kg)(1)(2\frac{m}{s})sin90\°=5.0kg\frac{m}{s}

b)

r=(0,-1)

angle = 90°

L=(2.5kg)(1)(2\frac{m}{s})sin90\°=5.0kg\frac{m}{s}

c)

r=(1,0)

angle = 0°

r and v are parallel

L = 0kgm/s

d)

r=(-1,0)

angle = 180°

r and v are parallel

L = 0kgm/s

e)

r=(1,1)

angle = 45°

L = (2.5kg)(2\frac{m}{s})(\sqrt{2})sin45\°=5kg\frac{m}{s}

f)

r=(-1,1)

angle = 45°

the same as e):

L = 5kgm/s

g)

r=(-1,-1)

angle = 135°

L=(2.5kg)(2\frac{m}{s})(\sqrt{2})sin135\°=5kg\frac{m}{s}

h)

r=(1,-1)

angle = 135°

the same as g):

L = 5kgm/s

hope this helps!!

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You are interested in space travel and want to learn more facts about space travel. Which would be the best source of informatio
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A book or a professor
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A 2kg ball is thrown upward with a velocity of 15 m/s what is the kinetic energy of the ball being thrown?
vivado [14]
Kinetic Energy, or K.E is equal to 1/2 times the mass of an object times the velocity squared.

Therefore K.E
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which is 225

Energy is expressed in joules (J)
so the K.E of the ball is 225J

Hope this helped
7 0
4 years ago
In the compound MgCl2, how many atoms of Mg are there?
Aleksandr [31]
There is 1 Mg and 2 Cl i think
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