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Drupady [299]
3 years ago
9

By which method does the following move into the cell: movement of oxygen, carbon dioxide, and other small uncharged molecules a

cross the membrane
Physics
1 answer:
Gwar [14]3 years ago
3 0
Oxygen, Carbon dioxide and other small uncharged molecules can move through the cell membrane through a method called osmosis 
osmosis is when there is a semipermeable membrane and molecules pass through it, where there is less concentration of molecules.
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sound is a longitudinal wave, and its speed depends on the medium through which it propagates. in air, sound travels at 343 m/s
melomori [17]

The speed of the sound wave in the medium, given the data is 3900 m

<h3>Velocity of a wave </h3>

The velocity of a wave is related to its frequency and wavelength according to the following equation:

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

With the above formula, we can obtain the speed of the sound wave. Details below:

<h3>How to determine speed of the sound wave</h3>

The speed of the wave can be obtained as illustrated below:

  • Frequency (f) = 600 Hz
  • Wavelength (λ) = 6.5 m
  • Velocity (v) =?

v = λf

v = 6.5 × 600

v = 3900 m

Thus, the speed of the sound wave in the medium is 3900 m

Learn more about wave:

brainly.com/question/14630790

#SPJ4

8 0
1 year ago
In addition to their remarkable top speeds of almost 60 mph, cheetahs have impressive cornering abilities. In one study, the max
Sav [38]

Answer:

the minimum value of the coefficient of static friction between the ground and the cheetah's feet is 1.94

Explanation:

Given that ;

the top speed of Cheetahs is almost 60 mph

In cornering abilities ; the maximum centripetal acceleration of a cheetah was measured to be = 19 m/s^2

The objective of this question is to determine the what minimum value of the coefficient of static friction between the ground and the cheetah's feet is necessary to provide this acceleration?

From the knowledge of Newton's Law;

we knew that ;

Force F = mass m × acceleration a

Also;

The net force  F_{net}  = frictional force \mu_k mg

so we can say that;

m×a = \mu_k mg

where;

the coefficient of static friction \mu_k is:

\mu_k = \dfrac{m*a}{m*g}

\mu_k = \dfrac{a}{g}

\mu_k = \dfrac{19 \ m/s^2}{9.81 \ m/s^2}

\mathbf{\mu_k} = 1.94

Hence; the minimum value of the coefficient of static friction between the ground and the cheetah's feet is 1.94

5 0
3 years ago
A race car starts at rest and accelerates north at 12.27 m/s2 for 3.19 seconds. What
IRISSAK [1]
Final velocity is equal to initial velocity plus at (where a is acceleration and t is time), so Vf = Vi + at

Using that formula;

Vf = 0 + 12.27(3.19)

Vf = 39.14 m/s

Note: you started from rest, so your initial velocity is 0.
8 0
2 years ago
Blank is the up and down movement of blank or blank caused by heat transfer.
kolbaska11 [484]

Answer:

Blank #1 Convection Current,  Blank #2 Liquids,  Blank #3 Gasses

Explanation:

7 0
3 years ago
Read 2 more answers
A snowboard has a mass of 1.53 kg. What is the static frictional force on the snowboard if the
Zigmanuir [339]

Answer:

Static friction, F=2.9988 N

Explanation:

Static Friction: It is the friction between two or more solid body that are not moving relative to each other.

              When an external force is applied to a body that is in contact with another body, static friction opposes the applied force upto a certain limit, keeping the body at rest. When the applied force exceeds the certain limit the  body begins to move. At that moment applied force is equal to limiting value of  static friction F.

                It varies linearly with normal force(N)

                       F∝N

                         F=μN   (where μ is constant of proportionality and known as coefficient of static friction)

Now,

Mass, m=1.53 kg

Coefficient of static friction, μ=0.2

Normal force, N=m×g

                        =1.53\times9.8     (g=9.8 m/s²)

                         =14.994 N  

Static friction, F= μN  

                         =0.2\times14.994

                          = 2.9988 N                                      

   

5 0
3 years ago
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