Explanation

Copper has the highest thermal conductivity (386 K m-1 K-1)

Copper has high thermal conductivity.

AGM 25-12-2022

Explanation

Heat conduction is a process in which heat is transferred from the hotter part to the colder part in a body without involving any actual movement of the molecules of the body.

AGM 25-12-2022

Explanation

Conventionally, clockwise torque is taken as negative

because clocks run in a negative direction according to the right-hand rule.

**

Counterclockwise is the positive rotation direction

Explanation

Sonar stands for "Sound Navigation and Ranging."

It uses high-frequency sound waves (ultrasonic waves) to detect and locate objects underwater

Explanation

In a photographic camera fitted with a convex lens, a real and inverted image is formed on the film. 

Convex lenses (also called converging lenses) always form real and inverted images when the object is placed beyond the focal point.

In a camera, the object (the scene being photographed) is positioned beyond the lens's focal point,

Ensuring that the light rays converge to form a real, inverted image on the film. 

Explanation

AMPS is based on the initial electromagnetic radiation spectrum allocation by the Federal Communications Commission (FCC) in 1970.

it was officially introduced in the Americas on October 13, 1983

AMPS was deployed in many other countries:

1. including Israel in 1986,
2. Australia in 1987,
3. Singapore in 1988,
4. and Pakistan in 1990

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ND04-12-2022

Explanation

• Weber is the SI unit of magnetic flux.
• 
  
• ***
• DETAIL:
• Unit system--->     SI
  
• Unit of------->             magnetic flux
• Symbol------->             Wb
• Named after-------->    Wilhelm Eduard Weber
• 1 Wb in ... ...         is equal to ...
  
• SI base units----->    1 kg⋅m2⋅s−2⋅A−1
• Gaussian units----->  1×108 Mx

Explanation

• A lake starts freezing because of the cold atmosphere. It will first freeze At the top surface
• ***
• concept:
• when the water freezes to ice, the ice becomes significantly less dense than the water and continues to float on the lake's surface.
• Below 4° Celsius, water becomes less dense as it gets colder, causing water to freeze to float to the top.
  
  

Explanation

The phenomenon of refraction of light is the shift in the path of light as it travels from one medium to another

Explanation

The guitar is a musical instrument of the chordophone family.

The standard guitar has following six strings:

1. E

2. A

3. D

4. G

5. B

6. E