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gizmo_the_mogwai [7]

3 years ago

6

Animals need oxygen to complete the many chemical reactions taking place in the body. An animal inhales oxygen and exhales _____

______ as a waste product?
Question 2 options:

Ozone

Carbon Monoxide

Carbon Dioxide

Nitrogen

2 answers:

andreev551 [17]3 years ago

7 0

Carbon dioxide and Nitrogen are the waste products.

mezya [45]3 years ago

5 0

Carbon dioxide and nitrogen

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PLEASE HELP ASAP! Any absurd answers will be reported. NO LINKS, IDC IF ITS THE ONLY WAY TO GET AN ANSWER.

svetoff [14.1K]

Answer:

There is a thing called a continental drift. It started about 200 million years ago. At first the continents were all attached, this super continent was called pangaea. Continental drift occurs because of the shift of the tectonic plates within the earth's outer shell. The heat from within the earth triggers movement to occur. This a very slow process though. It took 200 million years for the continents to get where the are now and would probably take another 200 to collide.

6 0

3 years ago

Read 2 more answers

The candle burning

vodka [1.7K]

Answer:

A

Explanation:

its oxygen I hope i am correct have a great day.

3 0

3 years ago

A typical electric refrigerator has a power rating of 500 Watts, which is the rate (J/s) at which electrical energy is supplied

Goshia [24]

Answer:

The rate of heat removed from inside the refrigerator is 300 watts.

Explanation:

By the First Law of Thermodynamics and the definition of a Refrigeration Cycle, we have the following formula to determine the rate of heat removed from inside the refrigerator ( $\dot Q_{L}$ ), in watts:

$\dot Q_{L} = \dot Q_{H}-\dot W$ (1)

Where:

$\dot Q_{H}$ - Rate of heat released to the room, in watts.

$\dot W$ - Rate of electric energy needed by the refrigerator, in watts.

If we know that $\dot Q_{H} = 800\,W$ and $\dot W = 500\,W$ , then the rate of heat removed from inside the refrigerator is:

$\dot Q_{L} = \dot Q_{H}-\dot W$

$\dot Q_{L} = 300\,W$

The rate of heat removed from inside the refrigerator is 300 watts.

3 0

3 years ago

. A car with a mass of 700-kg changes its speed from 10.0 m/s to 30.0 m/s in a displacement of 50.0 meters. Calculate the net fo

Nezavi [6.7K]

Answer:

5600N

Explanation:

Given parameters:

Mass of car = 700kg

Initial velocity = 10m/s

Final velocity = 30m/s

Displacement = 50m

Unknown:

Net force acting on the car = ?

Solution:

To find the force acting on a body, it is pertinent we know the mass and acceleration.

Force = mass x acceleration

Now;

Let us find the acceleration from the kinematics equations:

v² = u² + 2aS

v is the final velocity

u is the initial velocity

a is the acceleration

S is the distance

30² = 10² + (2 x a x 50)

900 = 100 + 100a

100a = 800

a = 8m/s²

Therefore;

Force = 700 x 8 = 5600N

6 0

3 years ago

A 4g bullet, travelling at 589m/s embeds itself in a 2.3kg block of wood that is initially at rest, and together they travel at

VARVARA [1.3K]

Answer:

The percentage of the kinetic energy that is left in the system after collision to that before is 0.174 %

Explanation:

Given;

mass of bullet, m₁ = 4g = 0.004kg

initial velocity of bullet, u₁ = 589 m/s

mass of block of wood, m₂ = 2.3 kg

initial velocity of the block of wood, u₂ = 0

let the final velocity of the system after collision = v

Apply the principle of conservation of linear momentum

m₁u₁ + m₂u₂ = v(m₁+m₂)

0.004(589) + 2.3(0) = v(0.004 + 2.3)

2.356 = 2.304v

v = 2.356 / 2.304

v = 1.0226 m/s

Initial kinetic energy of the system

K.E₁ = ¹/₂m₁u₁² + ¹/₂m₂u₂²

K.E₁ = ¹/₂(0.004)(589)² = 693.842 J

Final kinetic energy of the system

K.E₂ = ¹/₂v²(m₁ + m₂)

K.E₂ = ¹/₂ x 1.0226² x (0.004 + 2.3)

K.E₂ = 1.209 J

The kinetic energy left in the system = final kinetic energy of the system

The percentage of the kinetic energy that is left in the system after collision to that before = (K.E₂ / K.E₁) x 100%

= (1.209 / 693.842) x 100%

= 0.174 %

Therefore, the percentage of the kinetic energy that is left in the system after collision to that before is 0.174 %

6 0

3 years ago