3 years ago

Why is it good that adolescents prune their brains

1 answer:

5 0

Answer:

Synaptic pruning is an essential part of brain development. By getting rid of the synapses that are no longer used, the brain becomes more efficient as you age.

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Deb is planning to paint a wall of her house that has two regular hexagonal windows. Painting the wall costs $1.75 per square fo

azamat

Answer:

It will cost Deb $4,025

Explanation:

The average square feet of a room in United States is 2,300square feet.

I square foot cost $1.75

Therefore 2,300square feet will cost:

2,300 square feet × $1.75 = $4,025

6 0

3 years ago

If an object has a mass of 1 kg, what is its weight on earth

seropon [69]

9.81 newtons ......................... sorry it says twenty words

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3 years ago

If a roller coaster has 50,000 J of potential energy at the top of the first hill, how much kinetic energy does it have at the l

Fed [463]

Answer:

50,000 J because of the transformation of energy

Explanation:

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3 years ago

Predict Two objects have unlike charges. How

Kruka [31]

Answer:b

Explanation:

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3 years ago

The equation for free fall at the surface of a celestial body in outer space (s in meters, t in seconds) is sequals10.04tsqua

Sindrei [870]

Answer:

1.42 s

Explanation:

The equation for free fall of an object starting from rest is generally written as

$s=\frac{1}{2}at^2$

where

s is the vertical distance covered

a is the acceleration due to gravity

t is the time

On this celestial body, the equation is

$s=10.04 t^2$

this means that

$\frac{1}{2}g = 10.04$

so the acceleration of gravity on the body is

$g=2\cdot 10.04 = 20.08 m/s^2$

The velocity of an object in free fall starting from rest is given by

$v=gt$

In this case,

g = 20.08 m/s^2

So the time taken to reach a velocity of

v = 28.6 m/s

$t=\frac{v}{g}=\frac{28.6 m/s}{20.08 m/s^2}=1.42 s$

3 0

3 years ago