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3 years ago

Help plz, answer all

Physics

2 answers:

Ksenya-84 [330]3 years ago

5 0

Answer:

Explanation:

1: Portugal still greatly impacts Latin America, specifically Brazil. One of Brazil's official languages is Portuguese

2: Slavery has also greatly impacted the Caribbean and Latin America, with many people being of African descent in this countries, and countries like Haiti were created because of slavery.

3: Spain pretty much created Latin America, because most countries were colonized by Spain, and much of Spanish culture and the Spanish language remains.

shusha [124]3 years ago

3 0

Answer:

i could be 3 but i think its 2

Explanation:

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xxTIMURxx [149]

Answer:

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3 years ago

What is the maximum speed when the conditions are mass =450 kg, initial height= 30 m, and the roller coaster is initially at res

Zarrin [17]

Answer:

B. 24.2 m/s

Explanation:

Given;

mass of the roller coaster, m = 450 kg

height of the roller coaster, h = 30 m

The maximum potential energy of the roller coaster due to its height is given by;

$P.E_{max} = mgh\\\\PE_{max} = 450 *9.8*30\\\\PE_{max} = 132,300 \ J$

$P.E_{max} = K.E_{max} \ (law \ of \ conservation\ of \ energy)$

$K.E_{max} = \frac{1}{2}mv_{max}^2\\\\ v_{max}^2 = \frac{2K.E_{max}}{m}\\\\ v_{max}^2 = \frac{2*132300}{450}\\\\ v_{max}^2 =588\\\\v_{max} = \sqrt{588}\\\\ v_{max} = 24.2 \ m/s$

Therefore, the maximum speed of the roller coaster is 24.2 m/s.

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3 years ago

An imaginary line perpendicular to a reflecting surface is called _________.

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