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2 years ago

The primary colors of light are?

Physics

2 answers:

Degger [83]2 years ago

8 0

red, green and blue are the colors

Sergeu [11.5K]2 years ago

5 0

the correct answer is blue , green and red i just took the test and the only options are a, green , blue, and black b, cyan ,magenta , and yellow c, red, yellow, and blue or d, blue , green ,red

the answer is d hope this helped

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A cylinder that is 20 cm tall is filled with water. If a hole is made in the side of the cylinder 5 cm below the top level, how

lara31 [8.8K]

Answer:

See description

Explanation:

This is an example where we need Tornicelli's law, which states that the horizontal speed of a fluid that starts falling from an orifice is the same speed that an object acquires from free-falling.

$v = \sqrt{2gh}$

we are given:

$h_{cilinder} = 0.2 [m]\\h = 0.05 [m]\\d=0.15[m]$

the horizontal velocity of the water at the start is:

$v = \sqrt{2(9.8)(0.05)}=0.989949 [m/s]=1[m/s]$

now we need to find the time for the water drops to fall d:

as the gravity is the only force interacting with the water we have:

$y(t) = \frac{1}{2} g*t^2$

replace for y = d

$0.15 = \frac{1}{2} g*t^2=>t=\sqrt{\frac{2*0.15}{9.8}}=0.1749[s]$

now that we have t we notice that there are no horizontal forces interacting with the water, so the horizontal position is given by:

$x(t)=v*t$

Finally, we replace v and t:

$x(2.45) = 1*0.1749 = 0.1749 [m]=17.49[cm]$

4 0

3 years ago

A deviated nasal _________ occurs when the partition between the two nostrils is pushed to one side, leading to a partially obst

tatyana61 [14]

A deviated nasal septum occurs when the partition between the two nostrils is pushed to one side, leading to a partially obstructed airway in one nostril.

5 0

2 years ago

Two small objects, with masses m and m, are originally a distance r apart, and the gravitational force on each one has magnitude

elena-s [515]

32f. That's because the force is directly proportional to the product of the masses and inversely proportional to the square of the distance. So you get 2•(1/1/4)^2=2•16=32

6 0

3 years ago

Read 2 more answers

What will be the time period of simple pendulum at the center of earth

Furkat [3]

Answer:

As g=0 at the centre of earth the time period becomes infinite as T=2pi/underoot g. At center of earth, r = 0 & hence g = 0. Time period of a simple pendulum is T = 2π sqrt (1/g).

Explanation:

7 0

2 years ago

The energy difference in these two conformations has been measured to be about 23 kj per mole. how much of this energy differenc

Phantasy [73]

Answer:

The answer is 7.8 kJ / mol.

Explanation:

Energy = (number of methyl group) (Gauche interactions)(3.8kJ/mol per interaction)

= (2)(2)(3.8 kJ / mol)

= 15.2 kJ / mol.

The energy = (number of methyl group) - ( energy of gauche interactions)

= (23 kJ/mol) - 15.2 kJ/mol

= 7.8 kJ / mol.

8 0

2 years ago