Answer Posted / pravin tripathi

Soldering:-It is the process of joining two metal surfaces by solder which is an alloy for joining metals

What is speed of sound through water?

1020

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How does a sound wave travel in air?

1065

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How many more times louder is 70 decibels than 10 decibels?

963

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What is the principle of superposition?

1005

---

Which element has the lowest melting point?

1018

---

What two properties of electromagnetic waves are used to attach info to radio signals?

937

---

How we are getting light from electrical bulb?

1017

---

According to coulombs law, if two charged particles are repelled with a given force at a distance d, by what multiple will the force decrease by if d is increased by 4times?

967

---

What is the direction of null vector?

1268

---

Why ”quantum physics” is named as it is? : quantum physics

923

---

What is sound?

1013

---

What is frequency of sound in air?

1108

---

Explain what is a newton meter?

993

---

Why have the electron and the proton the same charge whereas the proton is 1836 times heavier?

1160

---

Mention the applications of electron microscope. : quantum physics

887

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