just water usage? - I also wondered this but obtained the investigation
elsewhere so don’ t know. I thought perhaps the plant does not put onthat much mass compared to the mass of the water so it becomes insignificant
Dicotyledonous stem
Leaves develop from the nodes.
The sections of stem between the nodes are called internodes.
An axillary bud is often found at the node. These forms lateral branches.
A terminal bud is found at the tip of the stem and allows the stem to increase
in length.
Internal structure of the dicotyledonous stem
This diagram of a cross section shows the internal structure of a young dicot
stem
A waterproof cuticle is found on the outside of the epidermis to prevent water
loss.
The epidermis consists of a single layer of cells to protect the underlying
tissue.
The cortex is made up of parenchyma cells that stores water and food.
The vascular bundles are arranged in a ring in the medulla and are surrounded by
non-living sclerenchyma cells for strengthening and support.
Each vascular bundle contains the following:
Cambium (contains meristematic cells that divide to widen the stem)
Phloem (transports food from leaves to the roots)
Xylem (transports water from the roots to the stem)
This is a link to an online tutorial about phloem, xylem and pressure flow.
Movement of water up the stem
Water moves up the xylem from the roots to the leaves.
Adaptations of xylem for transporting water:
Long, elongated tubes joined end-to-end without any cross-walls, forming good
conducting tubes.
The cell walls are thickened with lignin for support (annual or spiral
thickening) so that they do not collapse due to the upward pull of water
Pitted vessels and tracheids allow for lateral movement of water into
neighbouring xylem vessels.
Cells are dead, so there is no obstruction to water transport
Diagram of xylem
Three forces are responsible for the movement of water up the xylem –
capillarity, root pressure and transpiration suction force.
Capillarity involves forces of cohesion (forces of attraction between water
molecules) and adhesion (forces of attraction between water molecules and thesides of the xylem vessels). Because the xylem’s lumen (opening) is so
tiny, water will move up by capillary. However, this force is weak and its rolein moving water up the stem is small.
Root pressure is a force that pushes water up the xylem. As water enters the
root by osmosis, it pushes the water that is already in the xylem of the stemupwards.
Transpiration suction force is a very important force that pulls water up the
xylem of the stem. As water evaporates from the stomata of the leaves duringtranspiration, it creates a sucking force that will pull the water up the
xylem.
Investigation: plant tissue anatomy (root and stem)
Aim: To examine the structure of the root and stem
Apparatus
Scalpel or knife
Celery stalk (stem)
Carrot (root)
Glass slide
Iodine solution (Stain) or water
Cover slip
Dissecting needle or tweezers
Paper and pencil
Questions & Answers
Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
Scratch that
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you.
Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Specific heat capacity is a measure of the amount of energy required to raise the temperature of a substance by one degree Celsius (or Kelvin). It is measured in Joules per kilogram per degree Celsius (J/kg°C).
AI-Robot
specific heat capacity is the amount of energy needed to raise the temperature of a substance by one degree Celsius or kelvin
ROKEEB
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