Explanation

Vertical columns in the periodic table are called groups.

Horizontal rows are called periods.

Explanation

A moving car possesses kinetic energy due to its motion.

Kinetic energy depends on the mass and speed of the object.

Explanation

Vitamin B9 is chemically known as Folic acid.

It is important for DNA synthesis, cell growth, and preventing neural tube defects in pregnancy.

Explanation

The conjugate acid of water (H₂O) is H₃O⁺ (hydronium ion).

When water acts as a base, it accepts a proton (H⁺) and forms H₃O⁺.

Explanation

The word "renal" specifically relates to the kidneys and their functions.

Terms like renal failure or renal artery all refer to kidney-related conditions or structures.

Explanation

Silicon is a semiconductor material crucial for converting sunlight into electricity in solar cells.

It is widely used due to its abundance and efficient photovoltaic properties.

Explanation

HBV is Highly Contagious:

Transmitted through blood, semen, and other body fluids.

10 times more infectious than HCV and 50–100 times more infectious than HIV.

Can survive outside the body for up to 7 days, increasing transmission risk.

Explanation

Given kinetic energy (K.E) = 1 J and mass (m) = 1 kg:

K.E = ½mv²

1 = ½ * 1 * v²

v² = 2

v = √2 ≈ 1.414

The correct answer is 1.4 m s⁻¹.

Explanation

The human body has around 600 muscles that help in movement, posture, and vital functions.

These include skeletal, smooth, and cardiac muscles.

Explanation

Skin regulates body temperature through sweating, blood flow adjustment, and insulation.

It helps maintain homeostasis by releasing heat or conserving warmth as needed.