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2 years ago

Plains and mountains are examples of formed by processes that shape Earth's surface.

Physics

1 answer:

Kryger [21]2 years ago

7 0

Answer:

Im not sure what you're asking, but im assuming this is a TRUE or FALSE question.

This statment would be *TRUE*.

Explanation:

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Capillary action in trees can transport water from the roots to the tree's branches. The capillaries (Xyelem) in a certain tree

lesantik [10]

Answer:

$h=14.2857\,m$

Explanation:

Given:

radius of capillary, $r=10^{-6}\,m$

angle of contact, $\theta=0^{\circ}$

density of water, $\rho=1000\,kg.m^{-3}$

surface tension of water, $T=0.07 \,N.m^{-1}$

height, h = ?

We have the equation for the height of meniscus as:

$h=\frac{2T.cos\, \theta}{\rho.g.r}$

$h=\frac{2\times 0.07\times cos\,0^{\circ}}{1000\times 9.8\times 10^{-6}}$

$h=14.2857\,m$

No, the capillary action alone cannot be the mechanism of water transportation to the top of the trees. Transpiration also creates a suction pressure in the xylem complementary to the ascent of sap and cohesion of water being the other causes of movement of water up in the plants.

6 0

3 years ago

Part B - Permeability of the lipid bilayer Some solutes are able to pass directly through the lipid bilayer of a plasma membrane

Helen [10]

This Question is not complete

Complete Question:

Part B - Permeability of the lipid bilayer Some solutes are able to pass directly through the lipid bilayer of a plasma membrane, whereas other solutes require a transport protein or other mechanism to cross between the inside and the outside of a cell. The fact that the plasma membrane is permeable to some solutes but not others is what is referred to as selective permeability. Which of the following molecules can cross the lipid bilayer of a membrane directly, without a transport protein or other mechanism?

a) proteins

b) water

c) ions

d) sucrose

e) lipids

f) carbon dioxide

g) oxygen

Answer:

b) water

e) lipids

f) carbon dioxide

g) oxygen

Explanation:

Diffusion is the means by which molecules like water, lipids, carbon dioxide and oxygen easily move across the lipid bilayer of a membrane directly without the use of a transport protein or any another mechanism.

Diffusion is the way or means through which molecules( such as gases or liquids) move across a membrane from and region of higher concentration to a region of lower concentration.

Before a molecule can pass through the semi permeable membrane without the use of any mechanism or transport protein, it has to be:

a) a small molecule

b) an uncharged molecule

c) an hydrophobic molecule

7 0

3 years ago

A 900 kg car pushes a 2400 kg truck that has a dead battery. when the driver steps on the accelerator, the drive wheels of the c

Wewaii [24]

A)0
b)magnitude of the force on the car is 500n

5 0

3 years ago

Simple machines are in a mousetrap

sergeinik [125]

Answer:

A mousetrap makes use of a simple machine called a lever.

Explanation:

In a second-class lever the effort force is at the other end, with the load in the middle. In a third-class lever, the load is at the end and the effort force is between the fulcrum and the load. When you set the mousetrap, you are using a second-class lever. Sorry if I get this wrong. I am in 5th grade! ♥

7 0

3 years ago

Emeka carried out a reaction in which a gas was given off. He followed the progress of the reaction by measuring the mass of the

pickupchik [31]

Answer:

17.5

1.1 g/min

I know it's one of these, try getting a second opinion

6 0

3 years ago