Which of the following is true of the structures labeled A in the cell membrane?
Choose 1 answer:

(Choice A) A They are membrane proteins.

(Choice B) B They are entirely hydrophobic.

(Choice C) C They are phospholipids.

(Choice D) D They are carbohydrates. Report a problem

Answer:

When the gravitational force on the Moon from the Earth = 4.00 Fm, the distance of the Moon from the Earth is 0.5·D

Explanation:

The given information includes;

The distance of the moon from the Earth = 0.25·D

The gravitational force, F, on the Moon from the Earth = 16.00 Fm

When the gravitational force on the Moon from the Earth = 4.00 Fm, the distance of the Moon from the Earth is found as follows;

From Newton's law of gravitation;

[tex]F_{1} = F_{2} =G\dfrac{m_{1}m_{2}}{r^{2}}[/tex]

At r = 0.25·D, F = 16.00 Fm

Therefore;

G×m₁×m₂ = (0.25·D)²×16.00 Fm = D²×Fm = Constant

When, the gravitational force of the Moon from the Earth = 4.00 Fm, we have;

[tex]F = 4.00 \ Fm =\dfrac{D^2 \times Fm}{r_2^{2}}[/tex]

Therefore;

[tex]r_2^{2} =\dfrac{D^2 \times Fm}{4.00 \ Fm} = \dfrac{D^2}{4}[/tex]

[tex]r_2 =\sqrt{\dfrac{D^2}{4}} = \dfrac{D}{2} = 0.5 \cdot D[/tex]

r₂ = 0.5·D

Where;

r₂ = The new distance of the Moon from the Earth

Therefore the distance of the Moon from the Earth when the gravitational force on the Moon from the Earth = 4.00 Fm is r₂ = 0.5·D.

Answer:

Flammability.

Explanation:

I took the test.

Answer:

4.3446× 10^6

3.2156305×10^3

7.68841×10^-6

1.2153698×10^1

9.5677734

Explanation:

The statement that describes an energy measurement is one gram of wood stores 16,000 J, therefore the correct answer is option D

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

Thermal energy can be produced with help of various means such as by burning fossil fuels, with the help of solar energy.

The Joule is the recognized unit of measurement for energy (J). Kilowatt/hour (kWh), which is used specifically for electric energy, should be listed among the most used units for measuring energy (in fact it is used to calculate electricity bills). The Terawatt/hour (TWh), or one billion kW/h, is used to calculate the output of big power facilities or the country's consumption.

Thus, The statement that describes an energy measurement is one gram of wood stores 16,000 J, therefore the correct answer is option D

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Answer:

a. 77.1 g

b.0.000234 m

c. 6310000 mm

d. 10.2°C

Explanation:

Explanation:

there are 8 atoms of oxygen

Answer:

diffusion is the answer.

Answer:diffusion

Explanation: it right

Answer:

Å

1,55

5 400 Å

n

=

193548,4 km/s

1,55

3 10 m/s

n

c

Vidrio v: =

3 724,14 Å

1,45

5 400 Å

n

=

206 896,5 km/s

1,45

3 10 m/s

n

c

Aceite = v:

07,1

45,1

55,1

n

n

I

Answer:B. NET force: 2 resultant motion: left

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C. Net force: 3 Resultant motion: Left

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D. Net Force: 7 Resultant motion: right

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E. Net Force:0 resultant motion: NO MOTION

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F. NET Force: 3 resultant motion: Down

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G. NET FORCE: 10 resultant motion: up

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H. Net force: 3 Resultant motion: left

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I. Net force: 50 Resultant motion: right

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J. NET FORCE: 75 Resultant motion: down

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K. Net force :200 Resultant motion: Right

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L. Net force: 0 resultant motion:No motion

Explanation:

Answer:

1.5 kg is mass, .4 m is volume, and 3.9 kg/m is volume

Explanation:

When looking at these types of problems, consider each part. First, whenever problems have measurements that have similar units of measurement, check if they are density related. In this case, we use the formula of D=M/V, where D stands for density, M stands for mass, and V stands for volume. Any measurements that relate to grams or pounds are mass. In solids, volume is written in cm or m, while in liquid, volume is considered in liters and gallons. Density is always mass divided by volume, so we know that 3.9 kg/m is the density due to the units provided.

Answer:

whats the question??????

Explanation:

120 m/s × (1 km / 1000 m) × (3600 s / hr) = 432 km/hr

t = (500 km) / (432 km/hr) = 1.16 hr

Yes,increase in length affects period T.

Answer:

asking a question

Explanation:

Answer:Displacement method

Explanation:Placing irregular object in a Tube and then measuring the amount of water that either gets displaced from the container or goes up with the creatube and then measuring the amount of water that either gets displaced from the container or goes showing how much volume irregular object is.

In displacement method can be used to accurately measure the volume of oddly shaped objects.

The water displacement method can be described as a system of measurements used to find the volume of an object that has an irregular shape. A graduated cylinder will be used to measure the amount of liquid volume an object filled, but it can be done with less scientific techniques.

In order to determine the volume of an irregularly shaped solid, a person can use the water displacement formula. A container of water would require to be measured accurately, and precisely, with a starting volume of water.

Next, the solid will need to be completely submerged underwater, without any part of the object above the water. The water level has risen, and the final volume of the water requires to be recorded. The starting volume of the container requires to be subtracted from the final volume to get the volume of only the object.

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Answer:

Explanation:

acceleration is the change i velocity with respect to time.

Acceleration = change in velocity/time take

Acceleration = final velocity - initial velocity/time taken

Given initial velocity = 15m/s

final velocity = 25m/s

time = 6sec

Substituting the given value into the formula above to get acceleration

acceleration = 25-15/6

acceleration = 10/6

acceleration = 1.67m/s²

Hence Mia acceleration is 1.67m/s²

Answer:

Nylon fibres

Explanation:

Nylon fibres are synthetic polymers made of repeating units linked by amide links. It is a thermoplastic silky material which can be remoulded in any shape.

Nylon fibres have the property of strong elastic and light in weight that is why used for making ropes,  combat uniforms, and parachutes. Nylon Fibres are also lustrous and easy to wash so widely used in textile industry for making swimwear, track pants, shorts, and draperies.

Hence, the correct answer is "Nylon fibres".

Answer:

D all of the above

Explanation:

This is because newtons laws of motion explains movement of a body due to a force applied while that of gravity explains motion of a body under gravity and this captures a, b, and c

All the given options are following the Newton's laws of motion and Newton's law of gravity separately. All of the above options are correct. Hence, option (d) is correct.  

The given problem is based upon the Newton's law of motion as well as Newton's law of gravity. So let us analyze each of the given cases as:

(a)

The Earth moves around the Sun : This statement follows the Newton's first law of motion, which says that an object will continue its state of motion, until any external force is being applied on the object. Since, Earth is offered with no net force. Therefore, Newton's law is applicable.

(b)

Moon movers around Earth: This statement also follows the above explanation for the Newton's first law. Which makes moon to revolve around the Earth on an account of no net force. Hence, it will continue its circular motion and hence Newton's law of motion is followed.

(c)

An apple falls from a tree: This statement is based on Newton's law of gravity, which says that every particle in the universe attracts other particles such that the force of attraction is directly proportional to the product of their masses and inversely proportional to square of distance between them. Since, Earth has more mass than apply, therefore Earth will attract the apple downwards.

Thus, we can conclude that all the given options are following the Newton's laws of motion and Newton's law of gravity separately. All of the above options are correct. Hence, option (d) is correct.  

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Answer:

50 metres.

Explanation:

Given that a kayaker moves 32 meters northward then 6 meters southward finally 24 meters northward

To calculate the displacement, let assume that

Northward = positive

Southward = negative

Displacement = 32 - 6 + 24

Displacement = 56 - 6

Displacement = 50 metres

The direction of the displacement will be northward.

While the distance will be:

Distance = 32 + 6 + 24 = 62 metres

Answer:

a). Average speed = 26 km per hour

b). Average velocity = 10 km per hour

Explanation:

a). Distance between A to B = 5 km

    Distance between B to C = 4 km

    Total distance traveled between A to B to C and then back to B

    = 5 + 4 + 4

    = 13 km

Time taken to cover this distance of 13 km = [tex]\frac{1}{2}[/tex] an hour

Therefore, average speed during this trip = [tex]\frac{13}{\frac{1}{2}}[/tex]

                                                                      = 26 km per hour

b). Average velocity = [tex]\frac{\text{Displacement}}{\text{Duration}}[/tex]

   Displacement = (Distance between A to B) + (Distance traveled between B to C) - (Distance traveled from C to B)

                           = 5 + 4 - 4

                           = 5 km towards A

Average velocity = [tex]\frac{5}{\frac{1}{2}}[/tex]

                             = 10 km per hour

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Answer:

The car moving with constant speed on the path with a deep curve experiences an acceleration towards the center of the curve.

Explanation:

Acceleration is the rate of change of velocity with time. A velocity has both magnitude and direction, and a change in either or both of the magnitude and the direction can produce an acceleration on the car. The car on the curved path experiences a change in the direction of travel along the path. This changes in direction at every point on the curve puts an acceleration on the car towards the center of the curve.

Answer:

2.6 g/cubic centimeter

Explanation:

Given :

Weight of the quartz = 13 gram

Original level of water = 30mL

Level of water after quartz was is placed inside the cylinder = 35 mL

Therefore rise in water  = 35 - 30 = 5 mL

We known that 1 mL = 1 cubic centimeter

And density = mass / volume

Therefore, density of the quartz is = 13/5

                                                        = 2.6 g/ cubic centimeter

Answer:

9 is the number of protons in the fluorine atom (atomic number)

Explanation:

Answer:

Atomic number

Explanation:

Answer:

This statement is false.

Explanation:

If  the farmers field is close to the stream, and has experienced a lot of runoff, the runoff will carry chemicals from the farm into the stream, which includes fertilizers among other chemicals. This runoff into the stream will not lead to a decrease in the level of fertilizers in the stream. Therefore, one of the effect of this cannot be a decrease in the level of fertilizers from the field.

Answer:When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.

Explanation:

Answer:

860km

Explanation:

2× 430 = 860km

the rate is 430km per hr. 2 hours means you multiply by 2

Answer:

Newton's Third Law of Motion

Explanation:

it explains that forces always come in action-reaction pairs. The Third Law states that for every action force, there is an equal and opposite reaction force

Answer:

newtons third law of motion

Explanation:

newtons third law of motion explains that forces always come in action-reaction pairs

Answer:

Explanation:

a). Find the graph attached for the motion.

b). If a shopper walk 5.4 m westwards then 7.8 m eastwards,

   Distance traveled by the shopper = Distance traveled in eastwards + Distance traveled westwards

                                                            = 5.4 + 7.8

                                                            = 13.2 m

c). Displacement of the shopper = Distance walked westwards - Distance traveled eastwards

                                                      = 5.4 - 7.8

                                                      = -2.4 m

Therefore, magnitude of the displacement of the shopper is = 2.4 m

And the direction of the displacement is eastwards.

Answer:

Mass=DV

=19.3g/cm^3 ×1.61cm^3

=31.266g

Explanation:

Mass is the product of an objects density and the space it occupies (volume)

Answer:

When a bullet is fired from a gun, the gun exerts a force on the bullet in the forward direction. This is force is called as the action force. The bullet also exerts an equal and opposite force on the gun in the backward direction. Therefore a gun recoils when a bullet is fired from it.