Explanation

• If resistance is doubled, the current becomes half when voltage is constant.
• This is explained by Ohm’s Law: I = V / R.
• Current is inversely proportional to resistance.
• Increasing resistance reduces the flow of current.
• So doubling resistance halves the current.

Last verified on 10-05-2026

Explanation

• Ornithology is the branch of zoology that deals with the study of birds.
• It includes bird behavior, classification, and migration patterns.
• Scientists who study birds are called ornithologists.

Last verified on 10-06-2026

Explanation

• The relationship between voltage, current, and resistance is described by Ohm’s Law.
• It states that current is directly proportional to voltage and inversely proportional to resistance.
• The mathematical form is V = IR.

Last verified on 09-06-2026

Explanation

• Nuts and seeds are rich sources of Vitamin E.
• Vitamin E acts as a strong antioxidant in the body.
• It helps protect cells from damage and aging effects.
• Common sources include almonds, sunflower seeds, and walnuts.
• It supports skin health and immune system.

Last verified on 09-06-2026

Explanation

• Ibn Zakariya Al-Razi is considered the father of Pediatrics (Child healthcare).
• He was a famous Muslim physician, philosopher, and scientist.
• Field: Medicine, Chemistry, Philosophy
• Known as: Rhazes
• Famous books: Al-Hawi, Kitab al-Mansuri

Last verified on 09-06-2026

Explanation

• The velocity of a car moving in a circle is variable.
• Although speed may remain constant, direction is continuously changing.
• Since velocity depends on both speed and direction, it keeps changing.
• This type of motion is called circular motion.
• Therefore, velocity is not constant in circular motion.

Last verified on 09-06-2026

Explanation

• The human body contains about 65% oxygen by mass.
• Oxygen is the most abundant element in the human body.
• It is mainly present in water (H₂O) and organic compounds.
• It is essential for respiration and energy production.

Additional information:

• Carbon: ~18%
• Hydrogen: ~10%
• Nitrogen: ~3%
• Other elements: ~4% (calcium, phosphorus, etc.)

Last verified 09-06-2026

Explanation

• The causative organism of malaria (Plasmodium) was discovered by Charles Louis Alphonse Laveran in 1880.
• He identified the parasite in the blood of infected patients.
• This discovery proved that malaria is caused by a protozoan parasite.

Additional information:

• Ronald Ross discovered that malaria spreads through female Anopheles mosquito (1897).

Last verified on 09-06-2026

Explanation

Formula: °F = (9/5)°C + 32  

° F = (9/5)(50) + 32 = 90 + 32 = 122°F

So 50°C feels pretty hot - about 122°F.

Last verified on 09-06-2026

Explanation

Hydrogen gas is H₂, molar mass ≈ 2.016 g/mol  

Moles = mass / molar mass  

= 8.064 g / 2.016 g/mol = 4.0 mol

So there are 4 moles of H₂ molecules.

Last verified on 09-06-2026