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2 years ago

15 points..please write a short answer lIke 2 lines .

Physics

1 answer:

marusya05 [52]2 years ago

6 0

When the Sun is slightly below the horizon, its light moves from less dense air to more dense air and gets refracted towards the normal. Because of this atmospheric refraction, the Sun appears to be above the horizon when it is actually slightly below the horizon.

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The first periodic table of elements Mendeleev created contained how many elements

Mila [183]

Mendeleev created a periodic table with 63 initial elements.
He left gaps for unknown elements.
To this date, there are 118 elements in the periodic table.

6 0

3 years ago

Two separate disks are connected by a belt traveling at 5m/s. Disk 1 has a mass of 10kg and radius of 35cm. Disk 2 has a mass of

pantera1 [17]

Explanation:

Given that,

Linear speed of both disks is 5 m/s

Mass of disk 1 is 10 kg

Radius of disk 1 is 35 cm or 0.35 m

Mass of disk 2 is 3 kg

Radius of disk 2 is 7 cm or 0.07 m

(a) The angular velocity of disk 1 is :

$v=r_1\omega_1\\\\\omega_1=\dfrac{v}{r_1}\\\\\omega_1=\dfrac{5}{0.35}\\\\\omega_1=14.28\ rad/s$

(b) The angular velocity of disk 2 is :

$v=r_2\omega_2\\\\\omega_2=\dfrac{v}{r_2}\\\\\omega_2=\dfrac{5}{0.07}\\\\\omega_2=71.42\ rad/s$

(c) The moment of inertia for the two disk system is given by :

$I=I_1+I_2\\\\I=\dfrac{1}{2}m_1r_1^2+\dfrac{1}{2}m_2r_2^2\\\\I=\dfrac{1}{2}(m_1r_1^2+m_2r_2^2)\\\\I=\dfrac{1}{2}\times (10\times (0.35)^2+3\times (0.07)^2)\\\\I=0.619\ kg-m^2$

Hence, this is the required solution.

6 0

3 years ago

Automotive technology

viktelen [127]

lol what is this question

5 0

2 years ago

According to newton's second law of motion,the acceleration of an object equals the net force acting on the object divided by th

Shtirlitz [24]

<span>According to newton's second law of motion,the acceleration of an object equals the net force acting on the object divided by the objects "Mass"

Hope this helps!</span>

5 0

3 years ago

If the partial pressures of the three gases in the tank are 38.39 atm of O2, 3.38 atm of He, and 25.33 atm of N2, what is the to

Tasya [4]

Answer:

67.1 atm

Explanation:

From Dalton's law of Partial Pressures, the total partial pressure equals the sum of the individual partial pressures.

P = P₁ + P₂ + P₃

P₁ = 38.39 atm of O₂

P₂ = 3.38 atm of He

P₃ = 25.33 atm of N₂

So, P = P₁ + P₂ + P₃ = 38.39 atm + 3.38 atm + 25.33 atm = 67.1 atm

4 0

3 years ago

15 points..please write a short answer lIke 2 lines .​

15 points..please write a short answer lIke 2 lines .