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3 years ago

1. The largest time unit in the geologic time scale is the

1 answer:

8 0

Hi

Eon:
the longest division of geological time.

Era:
a major division of geological time

Period:
the interval taken to complete one cycle of a regularly repeating phenomenon.
Epoch:
a unit of geological time that is a subdivision of a period

That means Eon is the largest time unit in the geological timescale

thanks for asking

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A ball rolls off a level table with a speed of 2.2 m/s. The table is 1.2 meters high. How far away from the base of the table do

r-ruslan [8.4K]

The base of table is "1.08856 m" far away from the ball land.

Given:

Distance travelled by ball,

S = 1.2 m

Initial velocity,

u = 0 m/s

Acceleration,

a = 9.8 m/s²

Constant speed,

2.2 m/s

As we know the formula,

→ $S = ut+\frac{1}{2}at^2$

By substituting the values, we get

→ $1.2=\frac{1}{2}\times 9.8t^2$

→ $1.2 = 4.9 t^2$

→ $t = \sqrt{\frac{1.2}{4.9} }$

→ $= 0.4948 \ seconds$

Let,

Horizontal distance will be "x".
Time = t

→ $x = 2.2\times t$

$= 2.2\times 0.4948$

$= 1.08856 \ m$

Thus the solution above is right.

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3 years ago

Why is aluminum suitable material to use in makinv cans based on its physical and chemical properties

Llana [10]

low density, malleable, easy to form into shapes, not very chem reactive

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3 years ago

What is the velocity of position A and B? answer please

BaLLatris [955]

Answer:

A = 15 m/s , B = 18.75 m/s

Explanation:

from the velocity is equal to zero ( at rest ) , you see that velocity is increasing by 3.75 m/s for each second.

I hope that it's a correct answer.

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3 years ago

The energy of the electron in Hydrogen atom can be shown to be given by En = -13.6/n^2 eV, where n represents the principal quan

Tpy6a [65]

Answer:

This represents radiation in ultra-violet region .

Explanation:

Energy of the orbit where n = 3 is given as follows

$E_3 =- \frac{13.6 }{3^2}$

$E_3 =- \frac{13.6 }{9}$ = -1.511 eV

Energy of the orbit where n = 1 is given as follows

$E_1 =- \frac{13.6 }{1^2}$

$E_1 =- \frac{13.6 }{1}$ = 13.6 eV

Difference of [tex]E_3 and [tex]E_1 = - 1.511+ 13.6

= 12.089 eV.

The wavelength of light having this energy in nm is given by the expression as follows

Wavelength in nm = 1244 / energy in eV

= 1244 / 12.089

= 102.90 nm

This represents radiation in ultra-violet region .

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3 years ago

The acceleration due to gravity on the moon is 1.6 m/s2. What is the gravitational potential energy of a 1200-kg lander resting

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Hope this answers the question. Have a nice day.

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3 years ago

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