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rjkz [21]
3 years ago
7

How does natural selection produce change in a population of mice?

Physics
1 answer:
sergey [27]3 years ago
5 0

Answer:

The population of the mice will decrease to the faster, stronger, and smarter mice because the weaker will die because of natural selection.

Explanation:

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A block of mass 500g is pulled from rest on ahorizontal frictionless bench by a steady force F and travels 8m in 2s find the acc
Korvikt [17]

<u>We are Given:</u>

Mass of the block (m) = 500 grams or 0.5 Kg

Initial velocity of the block (u) = 0 m/s

Distance travelled by the block (s) = 8 m

Time taken to cover 8 m (t)= 2 seconds

Acceleration of the block (a) = a m/s²

<u>Solving for the acceleration:</u>

From the seconds equation of motion:

s = ut + 1/2* (at²)

<em>replacing the variables</em>

8 = (0)(2) + 1/2(a)(2)²

8 = 2a

a = 4 m/s²

Therefore, the acceleration of the block is 4 m/s²

3 0
3 years ago
A light spring of constant 163 N/m rests vertically on the bottom of a large beaker of water.
LUCKY_DIMON [66]

Answer:

24.71cm

Explanation:

We approach this problem base don Hooke's law which states the elongation produced in an elastic material is proportional to the applied load or force provided that its elastic limit is not exceeded. This is expressed mathematically as follows;

F=ke................(1)

where F is the applied force, k is the force constant and e is the elongation or extension of the material.

In this problem, the applied force F is the weight of the wood which is calculated as follows,

F=mg.............(2)

m = 4.11kg

g=9.8m/s^2

Hence,

F=4.11*9.8\\F=40.278N

Given that k = 163N/m, we make appropriate substitutions into equation (1) to obtain the following;

40.278=163*e\\e=\frac{40.78}{163}\\e=0.2471m

Since it is required in cm, we perform the conversion as follows, knowing that 100cm = 1m

0.2471m=0.2471*100cm=24.71cm

NB: We do not necessarily need the the density of the wood to perform our calculations since other parameters were given from which we were able to obtain its weight.

7 0
4 years ago
The density of the object on the left is 1.5 g/cm3 and the density of the fluid is 1.0 g/cm3. Which has greater density? The obj
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the first one is object and the second one is sink

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According to Newton's Third Law, what is the equal and opposite force to the downward force of gravity pulling on a man standing
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The equal and opposite reaction to the gravitational force of the Earth pulling down on a man standing on the beach is the gravitational force of the man pulling up on the Earth. <em>(A)</em>

To put it in other words ... which should begin to blow your mind if you just take a moment to think about them ...

Your weight on Earth is exactly equal to the Earth's weight on YOU.

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