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3 years ago

Humans and animals alike have critical periods of development.true false

Physics

2 answers:

Ilya [14]3 years ago

5 0

True, both humans and animals alike do have critical periods of development

geniusboy [140]3 years ago

5 0

Answer: True

Explanation:

Human beings and animals both have their critical time period of development and if they fail to learn things at that time then they fail to learn it for the rest of their life.

The development period of the animals and human beings starts after the birth when a person starts learning and development.

Example: If a bird does not learns to sing at the critical periods then it will not learn it the whole life.

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A marble slides without friction in a vertical loop around the inside of a smooth, 28.6 cm diameter horizontal pipe. The marble'

Leviafan [203]

Answer:3.49 m/s

Explanation:

Given

Speed of marble at Bottom $v=4.22 m/s$

Diameter of loop $d=28.6 cm$

As Energy is conserved therefore Energy at top is equal to energy at bottom

$E_T=E_B$

$\frac{mv^2}{2}+mgh=\frac{mv_0^2}{2}$ ,where $v_0$ is the velocity at bottom

$\frac{v^2}{2}+gh=\frac{v_0^2}{2}$

$v_0^2=v^2+2gh$

$v^2=v_0^2-2gh$

$v=\sqrt{v_0^2-2gh}$

$v=\sqrt{4.22^2-2\times 9.8\times 0.286}$

$v=\sqrt{17.8084-5.6056}$

$v=3.49 m/s$

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2 years ago

What is a small portable device that counts every step taken throughout the day?

Valentin [98]

Answer: B

Explanation: i learned it last year

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1 year ago

If 34.7 g of O2 reacts with iron to form 79.34 g of iron oxide, how much iron was used in the reaction?

zhuklara [117]

Answer: B. 44.64 g

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

Mass of reactants = mass of iron + mass of oxygen = mass of iron + 34.7 g

Mass of product = mass of iron oxide = 79.34 g

As Mass of reactants = Mass of product

mass of iron + 34.7 g = 79.34 g

mass of iron = 44.64 g

Thus 44.64 g of iron was used in the reaction

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2 years ago

What is electrostatic repulsion?

Anton [14]

Electrostatic repulsion is the force between two charges having the same sign, that tends to separate them further. The force is proportional to the product of the charges, and inversely proportional to the square of the distance between them.

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2 years ago

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What lasts longer... a perm, or a chemical relaxer for your hair ?

Dmitrij [34]

Answer:

Perm lasts longer

Explanation:

Cuz a chemical relaxer only lasts a few weeks and a perm lasts a few months hope this helps

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2 years ago