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3 years ago

What do u know about how the earths land is formed hint it’s made of rocks

Physics

2 answers:

Cerrena [4.2K]3 years ago

8 0

Answer:

it's made of land, rocks, water and many more

Explanation:

if you think about it, mountains are just giant rocks. and the ocean is water and land is... well land

Hatshy [7]3 years ago

7 0

Answer:

Well all Ik is that when the earth was formed it was a big hot rock then the water came in and settled it and the animals kinda became land creatures the yea

Explanation:

You might be interested in

Which energy resource produces greenhouse gases when it is used?

Hunter-Best [27]

Burning carbon compounds produces carbon monoxide and carbon dioxide.

The most popular sources of carbon compounds used for burning are
coal, oil, and natural gas, collectively referred to as "fossil fuels".

6 0

3 years ago

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Which of the following best describes an isotope? Which of the following best describes an isotope? an atom with an unequal numb

deff fn [24]

Answer:

a structural variation in which different atoms of the same element have different numbers of neutrons

Explanation:

An isotope is an atom of an element having the same number of protons but different number of neutrons. Different isotopes are used for different purposes. Example: some are used in medicines , food irradiation, etc.

Carbon has three isotopes C 12, C 13, C 14. All three of them have 6 protons but have different numbers of neutrons.

C 12 is a common element and is abundant in nature

C 13 is less abundant than C 12

C 14 is used for dating fossils . It is radioactive

6 0

3 years ago

A student uses a stopwatch to measure the period of the pendulum of the Beverly clock in the corridor. His measurements are: (a)

Westkost [7]

Answer:

Reading is close to (b) 13.44 which is the best estimate of the period

Associated error, $\Delta E =0.178 s$

Given:

$t_{a} = 13.54 s$

$t_{b} = 13.44 s$

$t_{c} = 13.89 s$

$t_{d} = 13.41 s$

$t_{e} = 13.17 s$

$t_{f} = 13.22 s$

Solution:

1.The best estimate of the period can be calculated by the mean of the measurements and the one closest to the mean is the best estimate of the measurement:

$Mean, \bar {x} = \fra{sum of all observations}{No. of observation}$

$Mean, \bar {x} = \frac{t_{a} + t_{b} + t_{c} +t_{d} + t_{e} + t_{f}}{6}$

$Mean, \bar {x} = \frac{13.54 + 13.44 + 13.89 + 13.41 + 13.17 + 13.22}{6}$

$Mean, \bar {x} = 13.445 s$

It is close to 13.44 s

2. Associated error is given by:

$\Delta E_{n} = |measured value - actual value|$

$\Delta E_{n} = |t_{n} - \bar {x}|$

where

n = a, b,......, e

Now,

$\Delta E_{a} = |t_{a} - \bar {x}| = |13.54 - 13.44| = 0.01$

$\Delta E_{b} = |t_{b} - \bar {x}| = |13.44 - 13.44| = 0.00$

$\Delta E_{c} = |t_{c} - \bar {x}| = |13.89 - 13.44| = 0.45$

$\Delta E_{d} = |t_{d} - \bar {x}| = |13.41 - 13.44| = 0.03$

$\Delta E_{e} = |t_{e} - \bar {x}| = |13.17 - 13.44| = 0.027$

$\Delta E_{f} = |t_{f} - \bar {x}| = |13.54 - 13.44| = 0.10$

Mean Absolute Error, $\Delta E = \frac{\Sigma E_{n}}{6}$

$\Delta E = \frac{0.01 + 0.00 + 0.45 + 0.03 +0.027 + 1.10}{6}$

$\Delta E =0.178 s$

3. The assumption behind the estimation is population is considered to distributed normally.

6 0

3 years ago

A bullet is fired vertically upward a velocity of 80m/s to what height will the bullet rise above the point of projection,note:

stellarik [79]

Answer:

Height:

${ \bf{height = \frac{ {velocity}^{2} }{gravity} }}$

Formular:

${ \tt{height = \frac{ {u}^{2} }{g} }}$

Substitute:

${ \tt{height = \frac{ {80}^{2} }{9.81} }} \\ \\ { \tt{height = 652.4 \: m}}$

3 0

3 years ago

Young people do have the ability to initiate a positive change in their community. Depending where they live they could always g

ddd [48]

Yes, young people have that ability. However, many of them do not use their ability wisely, and instead of contributing to their community, they only take.

hope this helps

4 0

4 years ago

Read 2 more answers