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Yuri [45]
3 years ago
7

Can you explain how population changes in size

Physics
1 answer:
geniusboy [140]3 years ago
7 0

Answer:

The population growth rate is the rate at which the population changes in size.

Explanation:

The rate of change is determined by subtracting the number of people that leave the population, through death or emigration, from the number of individuals that enter the population, through birth or immigration.

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With what force will a car hit a tree if the car has a mass of 3,000 kg and it is accelerating at a rate of 2m/s2
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You ride on an elevator that is moving with constant upward acceleration while standing on a bathroom scale. the reading on the
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The reading on the scale is greater than your actual weight.

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Define a dipole. Hence, write the expression for calculating the electric moment of a dipole​
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1 year ago
The head of a grass string trimmer has 100 g of cord wound in a light, cylindrical spool with inside diameter 3.00 cm and outsid
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Answer:

a).11.546J

b).2.957kW

Explanation:

Using Inertia and tangential velocity

a).

w=2250*2\pi *\frac{1}{60}\\ w=235.61

I=\frac{1}{2}*m*((\frac{d_{i} }{2})^{2} +(\frac{d_{e} }{2})^{2})\\m=100g *\frac{ikg}{1000g}=0.1kg\\ d_{i}=3cm*\frac{1m}{100cm}=0.03m \\ d_{e}=18cm*\frac{1m}{100cm}=0.18m\\I=\frac{1}{2}*0.1kg*((\frac{0.03m}{2})^{2} +(\frac{0.18m}{2})^{2})\\I=0.41625x10^{-3}kg*m^{2}

Now using Inertia an w

E=\frac{1}{2}*I*(w)^{2} \\ E=\frac{1}{2}*0.416x10^{-3}*(235.61)^{2} \\E=11.54J

average power=\frac{11.4J}{0.230s}=50.2 W

b).

power=t*w

P=11.5465*0.25*235.61

P=2.957 kW

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