how do the conditions in tube c prevent air reaching the iron nail​

Answer:

so you have a question

Explanation:

either way have a nice day

Answer:A plant root is an example of an organ

Explanation:The main function of the root is to collect nutrients and water from the soil.

Answer:

hi sorry i just want points YOSHIII :3

Explanation:

Answer:

v = 0.99 c = 2.99 x 10⁸ m/s

Explanation:

From the special theory of relativity:

[tex]t = \frac{t_o}{\sqrt{1-\frac{v^2}{c^2} } }\\[/tex]

where,

v = speed  of travel = ?

c = speed of light = 3 x 10⁸ m/s

t = time measured on earth = 90 years

t₀ = time measured in moving frame = 6 months = 0.5 year

Therefore,

[tex]90\ yr = \frac{0.5\ yr}{\sqrt{1-\frac{v^2}{c^2} } } \\\\\\\sqrt{1-\frac{v^2}{c^2}} = \frac{0.5\ yr}{90\ yr}\\ 1-\frac{v^2}{c^2} = 0.00003086\\\frac{v^2}{c^2} = 1-0.00003086\\[/tex]

v = 0.99 c = 2.99 x 10⁸ m/s

Answer:

a)  K = 0.63 J, b)  h = 0.153 m

Explanation:

a) In this exercise we have a physical pendulum since the rod is a material object, the angular velocity is

         w² = [tex]\frac{m g d}{I}[/tex]

where d is the distance from the pivot point to the center of mass and I is the moment of inertia.

The rod is a homogeneous body so its center of mass is at the geometric center of the rod.

              d = L / 2

the moment of inertia of the rod is the moment of a rod supported at one end

              I = ⅓ m L²

we substitute

            w = [tex]\sqrt{\frac{mgL}{2} \ \frac{1}{\frac{1}{3} mL^2} }[/tex]

            w = [tex]\sqrt{\frac{3}{2} \ \frac{g}{L} }[/tex]

            w = [tex]\sqrt{ \frac{3}{2} \ \frac{9.8}{0.75} }[/tex]

            w = 4.427 rad / s

an oscillatory system is described by the expression

              θ = θ₀ cos (wt + Φ)

the angular velocity is

             w = dθ /dt

             w = - θ₀ w sin (wt + Ф)

In this exercise, the kinetic energy is requested in the lowest position, in this position the energy is maximum. For this expression to be maximum, the sine function must be equal to ±1

In the exercise it is indicated that at the lowest point the angular velocity is

           w = 4.0 rad / s

the kinetic energy is

           K = ½ I w²

           K = ½ (⅓ m L²) w²

           K = 1/6 m L² w²

           K = 1/6 0.42 0.75² 4.0²

           K = 0.63 J

b) for this part let's use conservation of energy

starting point. Lowest point

             Em₀ = K = ½ I w²

final point. Highest point

             Em_f = U = m g h

energy is conserved

             Em₀ = Em_f

             ½ I w² = m g h

             ½ (⅓ m L²) w² = m g h

             h = 1/6 L² w² / g

             h = 1/6 0.75² 4.0² / 9.8

             h = 0.153 m

Answer:

water found underground is called undergroundwater

answer:

From the fan side: Salary caps mean better competition and more parity between all teams in a given league (in theory, anyway). Salary caps in the NFL, NBA and NHL can foster this, but in MLB, luxury tax requirements may not be enough to prevent large-market teams from dominating.

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Answer:

llogical or bizarre ideas or fantasies.

Explanation:

Answer:

breaking the circuit

Explanation:

Answer:

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Explanation:

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Answer:

- 1 m/s ( here (-) means the opposite direction of A)

Explanation:

Let m1=2kg, m2=2kg,u1= 3m/s,u2= -2 m/s, v1= 1m/s

m1u1+m2u2= m1v1+m2v2

2×3+2×(-2) = 2×1 + 2x

2= 2(1+x)

x = -1

Hope it helps

We have that for the Question "Calculate the distance the 500-N chid should sit from the fulcrum (pivot) to balance the sew-saw"

It can be said that

From the question we are told

weights are = 300 N and 500 N

length l = 6 m

take x distance from the 300 N

total torque is zero

[tex]300*3 = 500x\\\\x = 1.8 m[/tex]

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Answer:

Putting on makeup lol

Driving

Magnification and Science

Photography

Explanation:

I did an extra one if the makeup one wasn't allowed hahah

Answer:

5.08 metres

Explanation:

The both protons should be 5.08 meters apart so that force between them is equal to the weight of electron

The two protons will exert a repulsive force of 0.5 N when they are at a distance of [tex]2.146625 \times10^{-14} \,m[/tex] away from each other.

As protons have very little mass the gravitational force will be negligible. So here we will consider the electrostatic force between them.

[tex]0.5\, N = 9\times 10^{9} Nm^2 /C^2 \times\frac{(1.6\times 10^{-19}\,C)\times(1.6\times 10^{-19}\,C)}{r^2}[/tex]

ie; [tex]r= \sqrt{9\times 10^{9} Nm^2 /C^2 \times\frac{(1.6\times 10^{-19}\,C)\times(1.6\times 10^{-19}\,C)}{0.5\, N} } = 2.146625 \times 10^{-14}\,m[/tex]

Learn more about Coulomb's Law here:

https://brainly.com/question/1698562

Answer:

Voltage is required for there to be a current but resistance can effect the amount of current.

Answer:

the answer is voltage

Explanation:

we just finished this unit in class

Answer:

9) c

10) c

11) d

12) d

Explanation:

I think it's helps you

Answer:

I don’t know what that is I’m sorry

Explanation:

Answer:

tbh i wish i can help

Explanation:

Answer:

i.e 65 mph, and a direction, say "east'.

Explanation:

Answer:

Answer: The speed of the moon's rotation keeps the same side always facing Earth.

Explanation: Please mark me brainiest

Answer:

The speed of the Moon's rotation keeps the same side always facing Earth.

Explanation:

got it right on study island :)

Answer: 5-15MPH

Explanation: Trust me

Answer:

[tex]F \approx 19.5 N[/tex]

Explanation:

From the question we are told that:

Pressure of  [tex]P_{CO_2}=1.50 * 105 Pa.[/tex]

Bottle cap area [tex]A_b= 4.40 * 10-4 m^2[/tex]

Generally the equation for Resultant pressure [tex]P_r[/tex] is give as is mathematically given by

[tex]P_r=P_{CO_2}-P_a[/tex]

Where

[tex]P_a=atmospheric\ pressure = 1.013*10^5 pa[/tex]

[tex]P_r=1.50 * 105 Pa-1.013*10^5 pa[/tex]

[tex]P_r=0.487*10^5 pa[/tex]

Generally the equation for Force exerted by screw F is give as is mathematically given by

[tex]F = P*A\\F = 0.487*10^5*4.00*10^-4\\ F = 19.48 N[/tex]

[tex]F \approx 19.5 N[/tex]

Answer

Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. Once a rock has been broken down, a process called erosion transports the bits of rock and mineral away.

Erosion is the geological process in which earthen materials are worn away and transported by natural forces such as wind or water. A similar process, weathering, breaks down or dissolves rock, but does not involve movement.

Physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. The process is sometimes assisted by water. ... Freeze-thaw occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart.

Swiftly moving water. Rapidly moving water can lift, for short periods of time, rocks from the stream bottom. ...

Ice wedging. Ice wedging causes many rocks to break. ...

Plant roots. Plant roots can grow in cracks.

the erosion or disintegration of rocks, building materials, etc., caused by chemical reactions (chiefly with water and substances dissolved in it) rather than by mechanical processes.

Carbonation. When you think of carbonation, think carbon! ...

Oxidation. Oxygen causes oxidation. ... or

Hydration. This isn't the hydration used in your body, but it's similar. ...

Biological weathering is weathering caused by plants and animals. Plants and animals release acid forming chemicals that cause weathering and also contribute to the breaking down of rocks and landforms. Chemical weathering is weathering caused by breaking down of rocks and landforms.

Burrowing animals like shrews, moles, earthworms, and even ants contribute to biological weathering. ...

When animals like birds forage for seeds and earthworms, they create holes and erode the upper surface of the soil, thus, contributes to weathering.

rabbits and other burrowing animals can burrow into a crack in a rock, making it bigger and splitting the rock. You may have seen weeds growing through cracks in the pavement.

Explanation:

Hope this helps you!!

Answer:

The final position of the ship after the given time period is  42 km West of B.

Explanation:

Given;

average velocity of the ship, v = 35 km/h

time taken for the ship to reach point D, t = 1.2 hours

The position of the ship after the given time period is calculated as follows;

x = v x t

x = (35 km/h) x 1.2 h = 42 km

x  = 42 km West of B.

Therefore, the final position of the ship after the given time period is  42 km West of B.

Answer:

The answer is "[tex]4,500 - 225 \ V[/tex]".

Explanation:

Using formula for calculating the Voltage:

[tex]M_1=12.5\\\\M_2=250\\\\V_1=4,500 \\\\\bold{\text{Formula: }}\\\\\to \bold{\frac{m_1}{m_2}=\frac{V_2}{V_1}}\\\\\to \frac{12.5}{250}=\frac{V_2}{4,500}\\\\\to 0.05=\frac{v_2}{4,500}\\\\\to 0.05\times 4,500= V_2\\\\\to V_2=225\\\\[/tex]

Hence the range of accelerating in voltage is [tex]4,500 - 225 \ V[/tex]

Answer:

sediment accumulation in a lake near a farm.

Explanation:

In Agriculture, there are various techniques adopted by farmers for the growth and development of their crops. An effective and efficient agricultural technique would have a significant impact on the level of productivity attained by the farmers and as such meeting the unending requirements or needs of the consumers.

There are various agricultural techniques used in farming and these includes;

I. Mixed farming.

II. Arable farming.

III. Pastoral farming.

IV. Bush fallowing.

V. Shifting cultivation.

VI. Nomadic herding.

VII. Subsistence farming.

Generally, these agricultural techniques adopted by farmers has an effect or impact on the environment where it is practiced.

For example, one of such effect on the environment is the accumulation of sediments in a lake near the farm. Thus, this could lead to the formation of new materials such as silt, sand, clay, organic debris, etc., inside the lake.

Answer:

sediment accumulation in a lake near a farm.

Explanation:

Assuming the ball is swung around in a circle parallel to the ground, it has a centripetal acceleration a of

a = v ² / R

where v is the tangential speed of the ball and R is the length of the string.

The tension in the string is 0.5 N, so by Newton's second law, the ball has acceleration

F = m a   →   a = F / m = (0.5 N) / (0.1 kg) = 5 m/s²

where m is the ball's mass.

Solve for R :

a = v ² / R   →   R = v ² / a = (2 m/s)² / (5 m/s²) = 0.8 m = 80 cm