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4 years ago

What are the 2 factors that affect population size? Explain your answer.

2 answers:

5 0

The two factors that increase the size of a population are natality, which is the number of individuals that are added to the population over a period of time due to reproduction, and immigration, which is the migration of an individual into a place.

Tatiana [17]4 years ago

3 0

The two factors that affect population size are natality, which is the number of individuals that are ended to the population over a period of time due to reproduction, and immigration and which is a migration of an individual to a place.

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Compare the energy consumption of two commonly used items in the household. calculate the energy used by a 1.20 kw toaster oven,

slamgirl [31]

<span>we know energy = power*time(in hour) so energy used by 1.20kw(1200 watt) toast oven used for 6.2 min(6.2/60 hour) = 1200*(6.2/60)=1200*0.103 = 124 watt hour. Energy used by 11 w cfl used for 8.50 hour = (11*8) + (11* (50/60)) = 88+9.166=97.166 watt hour.</span>

5 0

3 years ago

Read 2 more answers

An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is

dmitriy555 [2]

Answer:

v = 1.15*10^{7} m/s

Explanation:

given data:

charge/ unit area $= \sigma = 1.99*10^{-7} C/m^2$

plate seperation = 1.69*10^{-2} m

we know that

electric field btwn the plates is $E = \frac{\sigma}{\epsilon}$

force acting on charge is F = q E

Work done by charge q id $\Delta X =\frac{ q\sigma \Delta x}{\epsilon}$

this work done is converted into kinectic enerrgy

$\frac{1}{2}mv^2 =\frac{ q\sigma \Delta x}{\epsilon}$

solving for v

$v = \sqrt{\frac{2q\Delta x}{\epsilon m}$

$\epsilon = 8.85*10^{-12} Nm2/C2$

$v = \sqrt{\frac{2 1.6*10^{-19}1.99*10^{-7}*1.69*10^{-2}}{8.85*10^{-12} *9.1*10^{-31}}$

v = 1.15*10^{7} m/s

8 0

3 years ago

A charge of 1.0 × 10-6 μC is located inside a sphere, 1.25 cm from its center. What is the electric flux through the sphere due

Korvikt [17]

Answer:

$\Phi_E=0.11\frac{N\cdot m^2}{C}$

Explanation:

According to Gauss's Law, the electric flux of a charged sphere is the electric field multiplied by the area of the spherical surface:

$\Phi_E=EA\\\Phi_E=E(4\pi R^2)\\\Phi_E=\frac{q}{4\pi \epsilon_0 R^2}(4\pi R^2)\\\Phi_E=\frac{q}{\epsilon_0}$

This is identical to the electric flux of a point charge located in the center of the sphere.

$\Phi_E=\frac{1*10^{-12}C}{8.85*10^{-12} \frac{C^2}{N\cdot m^2}}\\\Phi_E=0.11\frac{N\cdot m^2}{C}$

8 0

4 years ago

Two nuclear reactors provide 3200 MW of power.If the transmission system loses 5.1% of the energy produced,how much power from t

Annette [7]

The power that the customers receive is 163.2 MW

Explanation:

The efficiency of a system is given by

$\eta = \frac{P_{out}}{P_{in}}$

where

$P_{out}$ is the power in output

$P_{in}$ is the power in input

For the nuclear reactors in this problem, we have:

$P_{in} = 3200 MW$ (power generated by the reactors)

$\eta=0.051$ (efficiency is 5.1%)

Therefore, the power that reaches the customers is:

$P_{out} = \eta P_{in} = (0.051)(3200)=163.2 MW$

Learn more about power:

brainly.com/question/7956557

#LearnwithBrainly

6 0

3 years ago

When a hypothesis is wrong, scientists often begin by revising the (blank)

Vsevolod [243]

I might be wrong, but. The words seem to fit.

When a hypothesis is wrong, scientists often begin by revising the question after that, its common for scientists to redesign the experiment.

7 0

3 years ago

Read 2 more answers