ANS:B - would help

No answer description is available. 

ANS:A -

int main(int argc, char *argv[])

ANS:E - all the above.

Length of Gunter's chain is 6 feet not 66 feet.

ANS:A - remove hydrogen.

Phosphorus is indeed added to copper melt to remove hydrogen. When copper is melted or processed, it can absorb hydrogen from various sources such as moisture in the air or from the fuel used for heating. The presence of hydrogen in copper can lead to several issues including embrittlement, reduced ductility, and formation of internal defects like porosity. These hydrogen-related problems can significantly compromise the mechanical properties and quality of the copper. Phosphorus has a high affinity for hydrogen. When phosphorus is added to the molten copper, it reacts with the dissolved hydrogen to form phosphides, which then rise to the surface and can be removed as slag or dross. This process effectively removes hydrogen from the copper, helping to mitigate the associated problems such as embrittlement and porosity. Therefore, one of the important reasons for adding phosphorus to copper melt is indeed to remove hydrogen, thus improving the overall quality and properties of the copper.

ANS:B - Cable

No answer description is available.

ANS:B - the component being parallel to theflow direction.

The definition of drag in fluid dynamics is: Drag is the force component exerted on an immersed object parallel to the flow direction. Here’s an explanation:

• Parallel to the flow direction: Drag force is the resistance force exerted by a fluid on an object moving through it in the direction opposite to its motion. This force acts parallel to the relative motion between the fluid and the object.

• Passing the centroid of the body at 60° to the direction of motion: This describes a specific case of a force component acting at an angle to the direction of motion, not the definition of drag itself.
• The component being parallel to the flow direction: This is the correct definition of drag force, as explained above.
• The component being normal to the flow direction: This describes a perpendicular force component to the flow direction, which is not characteristic of drag force.
• None of these: While some of the options describe aspects related to forces acting on objects in fluids, the correct definition of drag is specifically the force component parallel to the flow direction.

ANS:D - Arunachal Pradesh

Arunachal Pradesh government inked a tripartite MoU with NITI Aayog and an organisation for a large-scale transformation in school education.

ANS:A - Kerala

Kerala Assembly holds 61 sittings in 2021, the highest in the country.

ANS:A - 1891

The Khongjom Battle, a significant event during the Anglo-Manipuri War, occurred in 1891. This battle is commemorated on Khongjom Day, observed on April 23 in Manipur, to honour the bravery and sacrifice of those who fought against British colonial forces during this period of history.

ANS:A - Kerala

A new species of Damselfly has been discovered in the Western Ghats of Peechi Wildlife Sanctuary in Thrissur, Kerala.