Explanation

The Radius is a bone found in the arm. 

Femur: The femur, or thigh bone, is the longest and strongest bone in the body and is located in the leg.

Semum: This is not a bone in the human body. The word may be a typo for another term.

Patella: The patella, also known as the kneecap, is the bone located in front of the knee joint. 

Explanation

The best description of an exothermic reaction is that it releases heat into the surroundings.

This causes the temperature of the surroundings to increase.

Key characteristics of exothermic reactions:

Releases heat:

The word "exo" means "out" and "thermic" means "heat," so the energy exits the system

Energy change:

The products of the reaction have less chemical potential energy than the reactants.

The energy difference is released into the surroundings, often as heat.

Negative enthalpy change:

In thermochemistry, this is represented by a negative change in enthalpy (Delta H<0).

Examples: Common examples include burning a substance, rusting iron, and the reaction that occurs inside hand warmers. 

Explanation

Formula:

KE=1​/2mv2

Where:

• $m=$ (mass)

• $v=$ (velocity)

Step 1: Square the velocity

v^2=^52=25

Step 2: Multiply by mass

m⋅v^2=2×25=50

Step 3: Multiply by 1/2

KE=1​/2×50=25J

Explanation

Sunbathing is primarily a good source of vitamin D

When UVB rays from the sun hit the skin, they convert a substance called 7-dehydrocholesterol into vitamin D3. 

This vitamin D3 then travels to the liver and kidneys to become the active form of vitamin D, which the body uses to absorb calcium and phosphorus. 

Benefits of Sunlight

Bone Health:

Vitamin D helps your body absorb calcium and phosphorus, which are crucial for strong bones. 

Immune System:

Adequate vitamin D levels are linked to a stronger immune system and may help regulate immune responses. 

Explanation

Explanation

The two primary shoulder bones listed are the clavicle (collarbone) and the scapula (shoulder blade). 

Explanation

The medical condition characterized by the complete absence of sperm in the semen is called azoospermia. 

Explanation

The woman is Raj's mother

The grandfather's only son is the woman's father.

The woman's father's only son would be her brother or possibly herself if she is also the son in question, but the riddle states that the only son is also Raj's son in this riddle.

The woman's father is the grandfather's only son.

The woman's father's son is the woman's brother, and she is the sister of the woman.

Explanation

Scurvy

Cause: Vitamin C (ascorbic acid) deficiency. 

Symptoms: Fatigue, weak and sore limbs, bleeding gums, easy bruising, delayed wound healing, and anemia. 

Other Vitamin Deficiencies 

Rickets: Caused by a deficiency in Vitamin D.

Beriberi: Caused by a deficiency in Vitamin B1 (Thiamine).

Night Blindness: Caused by a deficiency in Vitamin A.

Explanation