Explanation

In simple harmonic motion (S.H.M), the restoring force is minimum at Mean position. 

The restoring force is directly proportional to the displacement from the mean position.

At the mean position, the displacement is zero, meaning the restoring force is also zero at that point. 

Explanation

• The largest animal in the world is the blue whale (Balaenoptera musculus
• Reach lengths of up to 100 feet (30.5m) long
• Weight  200 tons
• Blue whale belongs to a group of mammals
• The blue whale also has a heart that has four chamber
• The heart of a blue whale weighs around 900kg.

 Last updated 12 april 2026

Explanation

The photoelectric effect does not occur if the frequency of the incident light is below the threshold frequency.

The threshold frequency is the minimum frequency required for the incident photons to have enough energy to eject electrons from the surface of the material.

If the frequency is below this value, no electrons are emitted, regardless of the light intensity.

Explanation

The heavily doped region of a transistor is called the emitter.

The emitter's heavy doping ensures it injects a large number of charge carriers (electrons in NPN transistors, holes in PNP transistors) into the base region, which is crucial for the transistor's operation. 

Explanation

 Angle in radians (θ) = Arc Length / Radius  

θ = 4 m / 2 m = 2 radians

So, the angle made at the center is 2 rad

Explanation

 In fructose, the functional group ketone is present on carbon number 2.

This is why fructose is classified as a ketohexose, a six-carbon sugar containing a ketone group. 

Explanation

The x-axis of the graph likely shows Substrate concentration. 

Many enzyme-related graphs depict the relationship between substrate concentration and reaction rate.

The substrate concentration is typically plotted on the x-axis, as it's the independent variable being manipulated to observe its effect on the enzyme activity.

Increasing substrate concentration generally leads to an increased reaction rate until the enzyme becomes saturated. 

Explanation

The assembly of the 40S and 60S subunits of the ribosome creates an 80S unit. 

80S unit:

This is the complete functional ribosome in eukaryotic cells, composed of the smaller 40S subunit and the larger 60S subunit. 

Explanation

At the highest point of a projectile's motion:

- Its velocity is purely horizontal (vertical component = 0).

- Its acceleration is still vertically downward due to gravity.

So, the velocity vector is horizontal, and the acceleration vector is vertical ⇒ they are perpendicular.

∴ Angle between velocity and acceleration = 90°  

Explanation

Research articles and patents mention Sam1 in the context of Streptococcus pyogenes.

Specifically, some studies discuss a strain of S. pyogenes (JRS4) and an isogenic protein  F-derivative of JRS4, both associated with Sam1.