Explanation

• The term "stellar" is used for stars and things related to stars.
• It comes from the Latin word "stella", meaning star.
• In astronomy, stellar objects include stars and star-related phenomena.
• Scientists use the term when studying the formation, evolution, and properties of stars.

Last verified on 11-06-2026

Explanation

• The SI unit of electrical resistance is Ohm (Ω).
• It measures how much a material opposes the flow of electric current.
• Higher resistance means less current flows.
• It is defined by V = IR (Ohm’s Law).
• 1 Ohm = 1 Volt per Ampere.

Last verified on 10-06-2026

Explanation

• The gravitational force keeps planets in orbit around the Sun.
• It is the force of attraction between masses.
• The Sun’s large mass pulls planets toward it.
• Planets keep moving forward, creating stable orbits.
• This balance results in circular or elliptical motion.

Last verified on 10-06-2026

Explanation

• At the highest point, the velocity becomes zero, but acceleration is still present.
• The object momentarily stops before coming back down.
• Acceleration due to gravity (g = 9.8 m/s² downward) remains constant.
• Only velocity changes direction, not acceleration.

Last verified on 10-06-2026

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

• 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

• 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

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

• The Gravitational constant (G) was first measured by Henry Cavendish in 1798.
• He used a torsion balance experiment to calculate Earth's density and gravitational force.
• His experiment is called the Cavendish experiment.
• Newton proposed the law of gravitation, but did not measure the value of G.
• Value of G is approximately 6.674 × 10⁻¹¹ N m²/kg².

Last verified on 09-06-2026

Explanation

• The thickness of Earth is about 13,700 kilometers (8,500 miles).
• The mantle, which is the biggest part of Earth by volume.
• It is approximately 2,900 kilometers (1,800 miles) thick. 

Last verified on 09-06-2026