When applied to ecology,what do the new science of chaos imply

Calculate the kinetic energy of a 4kg cat running 5m/s

natulia [17]

Kinetic energy = (1/2) (mass) (speed)²

   = (1/2) x (4 kg) x (5 m/s)²

   = (2 kg) x (25 m²/s²)

   = 50 kg-m²/s² = <em>50 joules

</em>

5 0

3 years ago

Which of the following objects is NOT normally used in current space exploration?

NikAS [45]

The last NASA Space Shuttle flight took place in 2013. The
remaining shuttles are decommissioned and now on display in
museums. So no shuttles are involved in today's space missions.

3 0

3 years ago

Architects have to consider how sound travels when designing large buildings such as theaters, auditoriums, or museums. Sound in

serious [3.7K]

Answer:

I₂ = 0.04 W / m²

Explanation:

Sound intensity is the power emitted between the unit area

I = W / A

W = I A

sound is a wave that travels in space whereby its energy is distributed on the surface of a sphere

A = 4π r²

we substitute

W = I (4π r²)

the emission power is constant, so the intensity at two different points is

W = I₁ 4π r₁² = I₂ 4π r₂²

so the equation is

I₁ r₁² = I₂ r₂²

In this case the units are not shown in the exercise, suppose that all units are in the SI system

I₂ = $I_1 \ \frac{r_1^2}{r_2^2}$

let's calculate

I₂ = 4 $4 \ \frac{2^2}{20^2}$

I₂ = 0.04 W / m²

5 0

2 years ago

A heavy rock is shot upward from the edge of a vertical cliff. It leaves the edge of the cliff with an initial velocity of 12 m/

jenyasd209 [6]

Answer:

The height of the building is 88.63 m.

Explanation:

Given;

initial component of vertical velocity, $v_i$ = 12 m/s sin 26° = 5.26 m/s

initial horizontal component of the velocity, $u_i$ = 12 m/s cos 26° =10.786 m/s

horizontal distance traveled by the rock, x = 40.4 m

time of flight is calculated as;

x = $u_i$ t

t = x / $u_i$

t = 40.4 / 10.786

t = 3.75 s

Determine the final vertical velocity of the ball;

$v_f = v_i + gt\\\\v_f = 5.26 + (9.8 *3.75)\\\\v_f = 42.01 \ m/s$

Determine the height of the rock;

$v_f^2 = v_i^2 + 2gh\\\\h = \frac{v_f^2 - v_i^2}{2g}\\\\ h = \frac{(42.01)^2 - (5.26)^2}{2*9.8}\\\\h = 88.63 \ m$

Therefore, the height of the building is 88.63 m.

5 0

2 years ago

Which part of the steam engine does the work?

erik [133]

Imagine living off nothing but coal and water and still having enough energy to run at over 100 mph! That's exactly what a steam locomotive can do. Although these giant mechanical dinosaurs are now extinct from most of the world's railroads, steam technology lives on in people's hearts and locomotives like this still run as tourist attractions on many heritage railways.

Steam locomotives were powered by steam engines, and deserve to be remembered because they swept the world through the Industrial Revolution of the 18th and 19th centuries. Steam engines rank with cars, airplanes, telephones, radio, and television among the greatest inventions of all time. They are marvels of machinery and excellent examples of engineering, but under all that smoke and steam, how exactly do they work?

6 0

3 years ago

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