Explanation

ND5-5-2023

Explanation

In the Fahrenheit scale:

• The freezing point of water is 32°F
• The boiling point of water is 212°F

Explanation

ایک ایسی بیماری ہے جس سے کمزوری ہوجاتی ہے اور جسم میں خون کی کمی ہوجاتی ہےScurvy

Scurvy is a disease caused by a serious vitamin C deficiency.

Not eating enough fruits and vegetables is the main cause of the disease. 

scurvy can lead to bleeding gums, loosened teeth and bleeding under your skin.

Vitamin C, also known as ascorbic acid, is necessary for the growth, development and repair of all body tissues.

Explanation

Kinetic energy is the energy an object possesses due to its motion.

The faster the object moves, the more kinetic energy it has.

Explanation

John Dalton proposed the Atomic Theory in the early 1800s, stating that all elements are made of indivisible atoms.

He described atoms as indestructible and identical for each element, laying the foundation of modern chemistry.

Explanation

A seismograph is an instrument used to detect and record earthquakes.

It consists of a mass attached to a fixed base

During an earthquake, the base moves and the mass does not.

Explanation

• Atoms of the same element with different numbers of neutrons are called isotopes.
• Atoms of the same element have the same number of protons and electrons but different numbers of neutrons.

Explanation

Explanation

Mercury is the only elemental metal that remains in a liquid state at room temperature (around 25°C).

It is used in thermometers, barometers, and other scientific instruments due to this unique property.

Four other elements are liquids slightly warmer than room temperature.

They are:

1. Francium
2. Cesium
3. Gallium
4. Rubidium

Explanation

Pieris Rapae is scientific name given to butterfly.

Pieris Rapae is derived from a Greek word. 

Pieris Rapae means Radish.

Explanation

The speed of sound in steel at 20°C is approximately 5100–5200 m/s, with 5130 m/s being a widely accepted value.

Sound travels faster in solids like steel due to their high density and elasticity compared to gases and liquids.

Explanation

Muscle is a type of tissue that contracts to produce movement.

The three main types of muscle tissues are skeletal, smooth, and cardiac.

Explanation

Cations are positively charged ions. 

Cations are formed when a metal loses its electrons.

Explanation

Cholera means ہیضہ

Typhoid means ایک قسم کا بخار

Typhoid and cholera spread through contaminated water, especially in areas with poor sanitation.

They are classic examples of water-borne diseases caused by bacteria like Salmonella typhi and Vibrio cholerae.

Explanation

Flatworms (phylum Platyhelminthes) have unsegmented, flat bodies.

Earthworms and tapeworms have segmented bodies.

Explanation

Explanation

Explanation

Newton's second law of motion states that F = ma, or net force is equal to mass times acceleration.

The other name for Newton's second law is the law of force and acceleration.

Explanation

Ascorbic acid, also known as vitamin C, is a water-soluble vitamin that is essential for various bodily functions, such as:

• Collagen production
• Wound healing
• Iron absorption
• Antioxidant functions

Vitamin C is one of the most well-known vitamins and is found in many fruits, vegetables, and other foods.

Explanation

Explanation

Pressure formula is expressed as P = F/A,

• where P is pressure,
• F is force,
• and A is the area by which the force is applied perpendicularly.

Its SI unit of pressure is Pascal (represented as Pa) 

Definition of Pressure:

 Pressure can be defined as the force acting per unit area.

Explanation

The Hindbrain is divided into three main parts:

• Medulla Oblongata (controls breathing, heart rate, and blood pressure)
• Pons (involved in controlling sleep and arousal)
• Cerebellum (coordinates movement, balance, and learning)

Explanation

Explanation

 A convex lens is thicker at the centre than at the edges. 

A camera uses a convex lens to focus light rays and form an image on a piece of film or a digital sensor at the back, capturing the scene in front of it.

Explanation

Explanation

Explanation

Fathom is used to measure the depth of water or the length of a nautical rope or cable.

A fathom is six feet, or 1.8288 meters.

Explanation

• Carbon dating is used to estimate the age of fossils.
• Those that are less than 60,000 years old.
• It is composed of organic materials like wood or leather.

Explanation

AB positive (AB+)

and O negative (O-) are considered universal blood types

because they can receive blood from all blood kinds

without experiencing any hemolytic reactions.

Explanation

Edward Jenner (1749-1823) was an English physician and scientist who discovered the smallpox vaccine in 1796.

He observed that milkmaids who had contracted cowpox, a similar virus, were immune to smallpox.

Explanation

The speed of light is much faster than the speed of sound in air.

Light travels 186 thousand miles in 1 second.

While sound takes almost 5 seconds to travel 1 mile.

Explanation

CNG and Sui Gas have the same composition, primarily methane (CH₄).

Both are used as fuel for heating and vehicles.

Explanation

Physiotherapy, is a healthcare profession that focuses on the assessment, diagnosis, and treatment of disorders and injuries that affect the physical function of the body.

Physiotherapists work to restore, maintain, and maximize a patient's strength, function, movement, and overall well-being.

Physiotherapy typically deals with:

• Immobility of joints and muscles
• Injuries or conditions affecting the musculoskeletal system (e.g., back pain, arthritis, sports injuries)
• Neurological conditions (e.g., stroke, spinal cord injury, Parkinson's disease)
• Cardiovascular and respiratory conditions (e.g., heart disease, chronic obstructive pulmonary disease)

Explanation

• Humidity in the air was measured by a Hygrometer.
• ****
  
• A hygrometer is an instrument used to measure relative humidity.
• Humidity is the measure of the amount of moisture in the air.
• A psychrometer is an example of a hygrometer.
• hygrometer.
  
• 
  
• ***
• The humidity in the air tells us about the ratio of Water vapors in the air

Explanation

Natural graphite is used in many ways, from making pencils lead, to forming batteries.

The layered structure formed due to rings of carbon atoms present in Graphite makes it slippery and for that reason, it is used in Pencil leads.

Graphite was named by Abraham Gottlob Werner in 1789.

It is an allotrope of carbon.

Graphite is a good conductor of electricity.

Explanation

Weight of the adult men brain $=49$ ounces
So, $49$ ounces
$=\frac{49}{16}$  pounds
$=3.0625$ pounds
Therefore, the weight in pounds is $3.0625$.

Explanation

The Earth is the fifth largest planet in the solar system. 

The order of the planets by size is:

1. Jupiter (largest)
2. Saturn
3. Uranus
4. Neptune
5. Earth
6. Venus
7. Mars
8. Mercury (smallest)

Explanation

The vitreous humor, sclera, and iris are all parts of the eye.

The vitreous humor is a clear gel that fills the space between the lens and the retina.

The sclera is the white outer layer of the eye.

The iris is the colored part that controls the size of the pupil.

Explanation

Arachnology is the scientific study of spiders and other arachnids, such as scorpions, ticks, and mites.

Arachnologists are biologists who specialize in the study of arachnids, including their behavior, ecology, evolution, and systematics.

Explanation

Explanation

An apiary is a place where bees are kept.

It typically for beekeeping and honey production.

It consists of multiple beehives maintained by beekeepers.

Explanation

Metacarpal bones are the five long bones found in the hand, connecting the wrist (carpal bones) to the fingers (phalanges).

They form the structure of the palm and provide support for finger movements.

Explanation

The element required for solar energy conversion is silicon.

Silicon is the most common semiconductor material: Silicon is used in about 95% of solar cells sold today. 

Silicon is a naturally occurring element: Silicon is the second most abundant element on Earth, after oxygen.

Explanation

Hydroelectric power is considered the cheapest and most environmentally friendly source of electricity.

As it utilizes the energy from flowing water without emitting greenhouse gases.

Explanation

The acceleration due to gravity is 9.8 m/s² downward.

This force acts on the ball throughout its motion.

This pulling it back to the ground after it is thrown upwards.

Explanation

• Anemia can be caused by a deficiency of iron or vitamin B9 (folate).
• Iron deficiency impairs hemoglobin production.
• While vitamin B9 deficiency affects red blood cell formation.

Explanation

Michael Faraday proposed the laws of electromagnetic induction in the year 1831.

Faraday's law or the law of electromagnetic induction is the observation or results of the experiments conducted by Faraday.

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RY 15-01-2023

Explanation

Tiger, (Panthera tigris), the largest member of the cat family (Felidae)

while

The rusty-spotted cat (Prionailurus rubiginosus) is one of the cat family's smallest members

ND5-07-2023

Explanation

Gamma rays have the highest penetrating power among these particles.

Due to their lack of mass and charge.

It allowing them to pass through most materials.

Explanation

Dengue viruses are spread to people through the bites of infected Aedes species mosquitoes

The mosquito becomes infected when it takes the blood of a person infected with the virus.

After about one week, the mosquito can then transmit the virus while biting a healthy person.24