All categories

3 years ago

There are ________ main groups in the modern periodic table of elements.

Physics

1 answer:

patriot [66]3 years ago

3 0

The Correct answer: 18

They are also known as families because they are in the same column.

You might be interested in

A drawback of burning biomass to produce electricity is that it is ___.

attashe74 [19]

Answer: Unsustainable wood harvesting can lead to deforestation, soil erosion, and desertification.

Explanation: you welcome

4 0

3 years ago

In which of the following graphs below are both runners moving at the same speed?

oksian1 [2.3K]

Graph D; They have the same slope, but start at a different distance.

5 0

3 years ago

Read 2 more answers

The daily average insolation on the earth surface is approximately 6 kWh/m2 (ignoring cloudy weather). If a commercially availab

miv72 [106K]

Answer:

The area is 15.502 km².

The fraction is $\dfrac{31}{218500}$

Explanation:

Given that,

Daily average insolation = 6 kWh/m²

Efficiency = 20%

Population = 324 million

Per capita power = 1378 watts

Area of tennessee = 109250 km²

We need to calculate the daily power required

Using given data

$daily\ power=population\times Per\ capita\ power$

Put the value into the formula

$daily\ power = 324\times10^{6}\times1378$

$daily\ power=4.4647\times10^{11}\ watts$

$daily\ power=4.4647\times10^{8}\ kW$

We need to calculate the total energy per day

Using given data

$E=6\tiimes24$

$E=144\ kW/m^2$

We need to calculate the out of total energy

Using energy and efficiency

$E'=E\times\eta$

$E'=144\times\dfrac{20}{100}$

$E'= 28.8\ kW/m^2$

We need to calculate the area

Using formula of area

$A=\dfrac{daily\ power}{out\ of\ energy}$

Put the value into the formula

$A=\dfrac{4.4647\times10^{8}}{28.8}$

$A=15.502\ km^2$

We need to calculate the fraction of Tennessee that is required to power

Using given data

$fraction =\dfrac{Area}{tennessee}$

Put the value into the formula

$fraction =\dfrac{15.502}{109250}$

$fraction=\dfrac{31}{218500}$

Hence, The area is 15.502 km².

The fraction is $\dfrac{31}{218500}$

6 0

4 years ago

An object start from rest with a constant acceleration of 8.00 m/s^2 along straight line.

san4es73 [151]

I’ll say c Bc it make more since to find the travel distance

7 0

3 years ago

The results from Rutherford's alpha particle scattering experiment led to

Brut [27]

Answer:

Explanation:

Can you help me in mathematics

7 0

3 years ago