Home/technology
  1. Asked: 1 month agoIn: ,

    Which of the given statements regarding the missiles is/are correct?

    Pankaj Gupta
    Pankaj Gupta Scholar

    Let's evaluate the two statements: Statement 1: Ballistic missiles are typically rocket-propelled and follow a parabolic trajectory that reaches the upper atmosphere before re-entering and hitting the target at high speeds, often supersonic or hypersonic. Cruise missiles, on the other hand, are typiRead more

    Let’s evaluate the two statements:

    Statement 1:

    • Ballistic missiles are typically rocket-propelled and follow a parabolic trajectory that reaches the upper atmosphere before re-entering and hitting the target at high speeds, often supersonic or hypersonic.
    • Cruise missiles, on the other hand, are typically powered by jet engines throughout their flight, allowing them to travel at subsonic or supersonic speeds, depending on the type of missile. They do not rely on rockets for propulsion after launch.

    The statement that ballistic missiles are jet-propelled at subsonic speeds throughout their flight and cruise missiles are rocket-powered only in the initial phase is incorrect. In fact, it should be the other way around: Ballistic missiles are rocket-propelled throughout their flight, while cruise missiles are jet-powered for most of their flight.

    Statement 2:

    • Agni-V is a long-range ballistic missile, not a cruise missile. It is capable of carrying nuclear warheads and has a range of around 5,000 km, making it an intercontinental ballistic missile (ICBM).
    • BrahMos is a supersonic cruise missile, not an intercontinental ballistic missile (ICBM). It is a joint venture between India and Russia and is one of the fastest cruise missiles in the world.

    Therefore, Statement 2 is also incorrect.

    Conclusion:

    Both statements are incorrect.

    The correct answer is: Neither 1 nor 2.

    See less
  2. Asked: 1 month agoIn: ,

    Which one of the following countries has its own Satellite Navigation System?

    Pankaj Gupta
    Pankaj Gupta Scholar

    The country that has its own satellite navigation system is Japan. Japan's satellite navigation system is called QZSS (Quasi-Zenith Satellite System), which provides satellite-based positioning and timing information, mainly in the Asia-Pacific region. Australia, Canada, and Israel do not have theirRead more

    The country that has its own satellite navigation system is Japan. Japan’s satellite navigation system is called QZSS (Quasi-Zenith Satellite System), which provides satellite-based positioning and timing information, mainly in the Asia-Pacific region.

    • Australia, Canada, and Israel do not have their own independent satellite navigation systems like Japan.

    So, the correct answer is: Japan.

    See less
  3. Asked: 2 months agoIn:

    Everyone knows who is the Missile Man of India but can anyone tell who is the Satellite Man of India?

    Keshav Sahu
    Keshav Sahu Explorer

    Udupi Ramachandra Rao is known as the Satellite Man of India

    Udupi Ramachandra Rao is known as the Satellite Man of India

    See less
  4. Asked: 3 months agoIn: , ,

    What is LiDAR?

    Pankaj Gupta
    Pankaj Gupta Scholar

    LiDAR, which stands for Light Detection and Ranging, is a remote sensing technology that uses laser light to measure distances and create highly detailed, three-dimensional maps of surfaces. Here’s a breakdown of how it works and its applications: How LiDAR Works Emission of Laser Pulses: A LiDAR syRead more

    LiDAR, which stands for Light Detection and Ranging, is a remote sensing technology that uses laser light to measure distances and create highly detailed, three-dimensional maps of surfaces. Here’s a breakdown of how it works and its applications:

    How LiDAR Works

    1. Emission of Laser Pulses: A LiDAR system emits thousands of laser pulses per second toward a target area.
    2. Measuring Distance: When these pulses hit an object (e.g., the ground, buildings, trees), they reflect back to the LiDAR sensor.
    3. Time of Flight: By measuring the time taken for each pulse to return, the system calculates the distance between the sensor and the object. This is known as the “time of flight” method.
    4. Data Processing: Each distance measurement (together with GPS location and orientation) is used to create a “point cloud,” which represents the 3D structure of the surveyed area.

    Types of LiDAR

    1. Airborne LiDAR: Mounted on airplanes or drones, it maps large terrains, including forests, coastlines, and urban areas.
    2. Terrestrial LiDAR: Used on the ground, this type can be mounted on vehicles or tripods for detailed surveys of buildings, roads, and other infrastructure.

    Applications of LiDAR

    • Mapping and Topography: Widely used in creating detailed topographical maps for environmental studies, city planning, and civil engineering.
    • Forestry: Assesses forest canopy structure, tree height, and biomass, useful in forest management.
    • Autonomous Vehicles: Provides real-time, high-precision 3D mapping of surroundings for self-driving cars to detect obstacles and navigate safely.
    • Archaeology: Detects hidden ruins or ancient settlements beneath dense vegetation.
    • Coastal and Floodplain Mapping: Helps in analyzing coastal erosion, flood risks, and modeling water flow in flood-prone areas.

    LiDAR is valued for its precision, versatility, and ability to work effectively in various lighting conditions, even at night.

    See less
  5. Asked: 4 months agoIn: , ,

    Component of a Neural Network

    Pankaj Gupta
    Pankaj Gupta Scholar

    The key components of a neural network encompass various elements that contribute to its functionality. Here’s a breakdown of the options provided: Neurons and Synapses: Neurons are indeed the fundamental units of a neural network, analogous to biological neurons, and synapses represent the connectiRead more

    The key components of a neural network encompass various elements that contribute to its functionality. Here’s a breakdown of the options provided:

    Neurons and Synapses: Neurons are indeed the fundamental units of a neural network, analogous to biological neurons, and synapses represent the connections between them, usually weighted to signify their importance.

    Layers and Nodes: Neural networks are structured in layers, including input, hidden, and output layers. Each layer consists of nodes (or neurons), which process inputs and pass outputs to subsequent layers.

    Recurrent Units and Dropout: Recurrent units are specific to recurrent neural networks (RNNs), which are designed for sequential data. Dropout is a regularization technique used to prevent overfitting by randomly dropping units during training.

    Given that all these elements play significant roles in different types of neural networks, the correct answer is: All of the above.

    See less