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Charra [1.4K]
3 years ago
7

Why do organisms need to breathe?​

Physics
1 answer:
Korvikt [17]3 years ago
4 0

Answer:

Most living things need oxygen helps organisms grow,reproduce,and turn food into energy.Oxygen gives our cells the ability to break down food in order to get the energy we need to survive.

You might be interested in
Which of the following statements about electromagnetic waves in free space are true? (There could be more than one correct choi
Vanyuwa [196]

Answer:

The electric field carries the same mount of energy as the magnetic field

The frequency of the magnetic field is the same as the frequency of the electric field.

Explanation:

Let's analyze each option in detail:

The electric and magnetic fields have equal amplitudes. --> FALSE. In fact, the amplitudes of the electric and magnetic field are related by the equation:

E=cB

where

E is the amplitude of the electric field

B is the amplitude of the magnetic field

c is the speed of light

Therefore, from the equation we see that the amplitude of the electric field is much larger than that of the magnetic field.

The electric field carries the same mount of energy as the magnetic field. --> TRUE.

The energy carried by the electric field is:

u_E = \frac{1}{2}\epsilon_0 E^2

where \epsilon_0 is the vacuum permittivity.

The energy carried by the magnetic field is:

u_B = \frac{1}{2\mu_0}B^2

where \mu_0 is the vacuum permeability.

Given the following relationship:

c=\frac{1}{\sqrt{\epsilon_0 \mu_0}}

We can write

E=cB=\frac{1}{\sqrt{\epsilon_0 \mu_0}}B

So

u_E = \frac{1}{2}\epsilon_0 (\frac{1}{\sqrt{\epsilon_0 \mu_0}}B)^2=\frac{1}{2\mu_0}B^2

which means u_E=u_B.

The electric field carries more energy than the magnetic field. --> FALSE, because in disagreement with the calculations above.

The frequency of the magnetic field is the same as the frequency of the electric field. --> TRUE. In an electromagnetic waves, electric field and magnetic field oscillate at the same frequency.

The frequency of the electric field is higher than the frequency of the magnetic field. --> FALSE, because in disagreement with the previous statement.

8 0
3 years ago
A copper Wire has a length of 160 m,and a diameter of 1.0 mm,if ,the wire is connected to a 1.5-Volt battery ,How much Current f
makkiz [27]
Some guidance notes which may help.To calculate the current flow, Ohm's law can be used. This can be written as current=voltage/resistance, or I=V/R. V is 1.5V.R for the copper wire quoted would be calculated as R = resistivity x length/cross sectional area. The area would be calculated from the formula area = pi x diameter squared/4So, R=resistivity x length divided by (pi x diameter squared/4)Until is the resistivity of copper is known, that's about as far as can be gone.Any further questions, please ask.
3 0
4 years ago
A helicopter flying horizontally at a height H with a speed v0needs to drop a supply capsule to a point P . Assume the capsule h
irinina [24]
L = V0 x t
L = V0 x (2H/g)^1/2
7 0
3 years ago
An 8.00 kg mass is at rest on an incline, the angle of the incline is 32.0°. The incline has a rough surface (μs = 0.375 and μk
neonofarm [45]

Answer:

F= 102,378 N

Explanation:

Attached files (photos).

5 0
4 years ago
A cart is pushed at a supermarket for a distance of 30 m South, then 15 m West and finally 5 m West. This entire motion lasts fo
PSYCHO15rus [73]

the speed would have to be somewhere between 1.667 or 1.666 miles per minute.

add 30, 15, 5 together and you will get 50

50 is the total miles traveled

then you multiply 30 by 1.666 and you will get 49.98 but it's still not quite 50 miles

if you multiply 30 by 1.667 and you will get 50.01 but its a little over to miles

i got the 30 from the minutes traveled

anyway that's the best i got for speed

3 0
3 years ago
Read 2 more answers
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