In a food pyramid, the organism that has the least amount of total energy available is the one that is in the bottom or last. In this case, given the list of organisms above, the organism that would have the least amount of total energy available would be the RED FOX. The answer is option A. Hope this answer helps.

6 0

4 years ago

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Use the work-energy theorem to determine the force required to stop a 1000 kg car moving at a speed of 20.0 m/s if there is a di

Vlad1618 [11]

Answer:

4.44 kN in the opposite direction of acceleration.

Explanation:

Given that, the initial speed of the car is, $u=20m/s$

And the mass of the car is, $m=1000 kg$

The total distance covered by the car before stop, $s=45m$

And the final speed of the car is, $u=0m/s$

Now initial kinetic energy is,

$KE_{i}=\frac{1}{2}mu^{2}$

Substitute the value of u and m in the above equation, we get

$KE_{i}=\frac{1}{2}(1000kg)\times (20)^{2}\\KE_{i}=20000J$

Now final kinetic energy is,

$KE_{f}=\frac{1}{2}mv^{2}$

Substitute the value of v and m in the above equation, we get

$KE_{f}=\frac{1}{2}(1000kg)\times (0)^{2}\\KE_{i}=0J$

Now applying work energy theorem.

Work done= change in kinetic energy

Therefore,

$F.S=KE_{f}-KE_{i}\\F\times 45=(0-200000)J\\F=\frac{-200000J}{45}\\ F=-4444.44N\\F=-4.44kN$

Here, the force is negative because the force and acceleration in the opposite direction.

6 0

3 years ago

All celestial objects we tracted to each other by gravity.Asteroids A and B are 5 meters (m) part. Asteroids C and D are also 5

Nadusha1986 [10]

A. Between asteroids C and D because gravitational attraction is greatest with increased mass.

6 0

3 years ago

If the relative density of a metal is 19,what will be the mass of 20cm of the metal when immersed in water?

Lady_Fox [76]

Answer:

The mass of 20 cm of the metal is 360 grams.

Explanation:

Relative density or specific gravity is the ratio of the density of a substance to the density of a standard; usually water for a liquid or solid, and air for a gas. It has no units.

Given, relative density of a metal is 19 and volume of the metal is 20 cm.

We know that, Mass= Volume X Density. So, mass is 19 X 20= 380 grams.

So, weight in water = true weight- upthrust

Desired answer is 380- 20 X 1= 360 grams.

3 0

3 years ago

What are the three main types of rocks?​

What are the three main types of rocks?