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3 years ago

14

A 2N and 6N force pull on an object to the right and a 4N force pulls to the left a 0.5kg object. What is the net force on the o

bject?

1 answer:

Angelina_Jolie [31]3 years ago

3 0

Explanation:

F net = 2+6-4 ( 2 and 6 N are in same direction so they get added, 4N in opposite direction so it will be subtracted)

F net=4 N

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If a car travels down the highway at a constant speed, are the forces acting on the car balanced or unbalanced?

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3 years ago

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 $\dfrac{31}{218500}$

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4 years ago