Homechevron_rightEngineeringchevron_rightGeneral Sciencechevron_rightGeneral Sciencechevron_rightThe working principle of a rocket engine is based on the

The working principle of a rocket engine is based on the-

  • Q. The working principle of a rocket engine is based on the-
  • filter_dramaExplanation
    Answer is : C

    Newton’s third law of motion
    • Newton’s third law states that if we are applying a force on any object then that object also applies equal and opposite force on us. It is also called the action and reaction force.
    • Applied force = Reaction force.
    • Rocket exhausting a gas with a very high velocity which provides the reaction force on the rocket, due to which it moves upward.

    Newton’s first law of motion-
    • Newton’s first law states that an object will remain at rest or in uniform motion unless an external force acts upon it.
    • It is also called the law of inertia.

    Newton’s second law of motion
    • The acceleration of any object is directly proportional to the net applied force.
    • The direction of the acceleration of the object will always be in the direction of the net applied force.
    • F = ma, where m is the mass of the object and a is the acceleration of the object.

    Conservation of energy
    • The conservation of energy states that energy neither can produce nor can destroy, it can convert from one form to another form.

Discussion

    No one started the discussion yet. Break the ice and start the conversation.
    Please Login to be part of the discussion.

Similar Questions

  • 1. An AI technique that allows computers to understand associations and relationships between objects and events is called:
  • filter_dramaExplanation
    Answer is : D
    No Explanation
  • 2. Graphite is a/an?
  • filter_dramaExplanation
    Answer is : D

    The correct answer is Non-metal.

    Concept

    • Alloy - Alloys are formed by the combination of two or more metals. Example - Bronze is an alloy of Sn and Cu.
    • Metalloid - Elements that have characteristics of both metals and non-metals.
    • Allotrope - Different crystalline forms of an element. Diamond and graphite are allotropes of carbon.

    Explanation

    • Carbon is a non-metal therefore its allotrope graphite is also a non-metal.

    Additional Information

    • Non- metal is generally a poor conductor of electricity but some exceptions are there.
    • Graphite can conduct electricity even though it is a non-metal because of the presence of delocalized electrons in its structure.
  • 3. The process of converting ammonia into nitrates is called:
  • filter_dramaExplanation
    Answer is : D

    The correct answer is Nitrification.

    Key Points

    • The process of conversion of ammonia into nitrate nitrogen is called nitrification.
    • It is done in two steps- Nitrite formation, Nitrate formation.
    • Nitrite formation- Ammonia are oxidized to nitrites by Nitrococcus, Nitrosomonas.

    Additional Information

    • The nitrogen cycle has four steps-
      • Nitrogen Fixation- Conversion of molecular nitrogen into the inorganic nitrogenous compound.
      • Ammonification- Conversion of the dead organic nitrogenous compound into ammonia.
      • Nitrification- Oxidation of ammonia into nitrates.
      • Denitrification- Nitrites or nitrates converts back into molecular nitrogen.

    Simplified nitrogen cycle (after [64]).... | Download Scientific Diagram

  • 4. Ampere-hour is an unit of
  • filter_dramaExplanation
    Answer is : A

    Concept:

    • Electric current is the rate of flow electric charge or free Electrons in a definite direction through any section of wire. Its SI unit is ampere(A).
    • The direction of the conventional current corresponds to the direction of positive charge which is from higher potential(positive) to lower potential(negative).

    I = Q / t

    I is current, Q is charge, t is time

    Explanation:

    Q = I t

    So Charge is the product of current and time.

    Unit of current is Ampere, and unit of time is an hour. 

    So, Amount of charge or Quantity of electricity is Ampere-hour 

  • 5.

    Which of the following is an attack in which the user receives the unwanted amount of e-mails?

  • filter_dramaExplanation
    Answer is : A

    Important Points

    Email bomb

    It is an attack on your inbox that involves sending massive amounts of emails to your address. Sometimes these messages are complete gibberish, but more often they’ll be confirmation emails for newsletters and subscriptions.

    Additional Information

    Spoofing 

    It is the act of disguising a communication from an unknown source as being from a known, trusted source. Spoofing can apply to emails, phone calls, and websites, or can be more technical, such as a computer spoofing an IP address, Address Resolution Protocol (ARP), or Domain Name System (DNS) server.

    Smurf Attack

    It is a form of a DDoS attack that causes packet flood on the victim by exploiting/abusing ICMP protocol. When deployed, large packets are created using a technique called “spoofing”. The phony source address that is now attached to these packets becomes the victim, as their IP is flooded with traffic. The small ICMP packet generated by the tool causes big trouble for a victim, hence the name Smurf.

    Ping storm

    It is a condition in which the Internet ping program is used to send a flood of packets to a server to  test its ability to handle a high amount of traffic or, maliciously, to make the server inoperable

    Hence Option 1 is correct

General ScienceTopics

leaderboardLeaderboard
  • Rahul Kumar

    191 Points

  • VIKRAM JEET

    54 Points

  • GEETHIKA CHOWDARY

    53 Points

  • sunita saini

    52 Points

  • Zain

    49 Points