Explanation

I dropped ⇒ initial velocity =0

⇒ time will be given by h=12gt^2

t=√2hg=√2×20 m10 m/s^2=2 sec

II both reaches simultaneously be so ti,e taken by IInd stone will be 

2 sec−1 sec=1 sec

or t′=1 sec

putting it in h=ut'+12gt^2

& h=20 m,g=10m/s^2

we get 

20=u×1+5×1

⇒u=15 m/s

Explanation

Starch and cellulose are two very similar polymers. In fact,

they are both made from the same monomer, glucose, and have the same glucose-based repeat units.

Explanation

The electron transport chain (ETC) is critical to cellular respiration.

It culminates in: The generation of the majority of ATP molecules, which are synthesized during oxidative phosphorylation

Explanation

the elements that are positioned above the hydrogen have negative reduction potential, whereas elements that are arranged below the hydrogen have positive electrode potential.

In the electrochemical series, metals above hydrogen are good reducing agents, and those below hydrogen are good oxidizing agents. 

Explanation

The ligand diethylene triamine is tridentate

 It has 3 donor N atoms.

Explanation

Ethane dehydrogenation (EDH) is endothermic, and the thermodynamic equilibrium limits its conversion.

reason:

Because the EDH reaction is endothermic,

the reaction is favored at high temperatures for obtaining high ethane conversion, high activity, and high ethylene selectivity

Explanation

How is the Rainbow formed? 5 marks

Rainbow:

"A rainbow is a meteorological and optical phenomenon that is caused by the reflection, refraction, and dispersion of light in water droplets"

Color of Rianbow:

The colors of the rainbow are:

1. Red
2. orange
3. yellow
4. green
5. blue
6. indigo
7. and violet.

Rainbow formed:

• When sunlight hits a rain droplet, some of the light is reflected.
  
• The electromagnetic spectrum is made of light with many different wavelengths, and each is reflected at a different angle.
• Thus, the spectrum is separated, producing a rainbow.

ND23-2-2023

Explanation

Smooth muscles are not striated

Because their cells are arranged in sheets instead of bundles.

They do not have organized sarcomeres.

Additional information:

Both skeletal and cardiac muscles appear striated, or striped,

Because their cells are arranged in bundles

However skeletal muscle fibers are multinucleated.

Whereas, the cardiac muscle fiber is uninucleated.

Explanation

The epidermis covers the stem, root, leaf, flower, fruit, and seed parts of a plant.

It is the outermost, protoderm-derived layer of cells 

Additional informational:

Its waxy cuticle provides a protective barrier against mechanical injury, water loss, and infection.

It regulates the gas exchange in plant cells.

They regulate the secretion of metabolic substances.

Explanation

After being involved in an accident, the first responsibility as a driver is to stop at the scene.

Stopping after being involved in an accident is not only a legal requirement in most places

but also a responsible and necessary action to ensure the safety of all parties involved,

assist if needed,

and comply with legal procedures following a traffic incident.