Physics

    Everyday Science
    What is the most important piece of hardware in a computer?
    The most important piece of hardware in a computer is the Central Processing Unit (CPU). The CPU is the brain of the computer and is responsible for carrying out all of the instructions that are given to it. Without a CPU, the computer would not be able to function. The mouse, keyboard, and monitor are all important pieces of hardware, but they are not as essential as the CPU. The mouse is used to point and click on objects on the screen, the keyboard is used to enter text, and the monitor is used to display the output of the computer. However, all of these devices can be replaced or substituted with other devices. For example, a computer can be controlled by a joystick or a touchscreen instead of a mouse, and a computer can be displayed on a TV or a projector instead of a monitor.
    Author: rikazzz Comment
    Everyday Science
    Which instrument is used for measuring solar radiation and sunshine?
    Instrument for measuring Solar Radiation is Pyranometer.
    Author: rikazzz Comment
    Electrostatics
    According to Coulomb’s law, how does the repulsion between two positively charged objects change as the distance between them increases?
    As per coulomb’s law, when the distance of separation increases, the attraction of 2 positively charged objects _____ As per Coulomb’s law, when the distance of separation increases, the attraction of 2 positively charged objects decreases. Coulomb’s law states that the force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Mathematically, the law can be expressed as: F = k * q1 * q2 / r^2 Where F is the force between the charges, q1 and q2 are the magnitudes of the charges, r is the distance between them, and k is the Coulomb constant. As we can see from the formula, the force of attraction between two positively charged objects decreases as the distance of separation between them increases. This is because the force of attraction between the charges is inversely proportional to the square of the distance between them. Therefore, as the distance between them increases, the force of attraction decreases, and the charges are less likely to be drawn towards each other.
    Author: rikazzz Comment
    Atomic and Nuclear Physics
    Protons, electrons and neutrons are collectively referred to as:
    Author: rikazzz Comment
    Physics
    What is the main difference between refraction and diffraction?
    Author: rikazzz Comment
    Physics
    Which of the following is not a valid conservation law of classical physics?
    Law of conservation of current is not a valid conservation law of classical physics.
    Author: rikazzz Comment
    Physics
    Time of exposure required for taking photograph of an object depends upon the
    The total exposure is proportional to this exposure time, or duration of light reaching the film or image sensor. The correct exposure for a particular object depends on the brightness of the object to be photographed.
    Author: rikazzz Comment
    Physics
    Which of the following has the highest entropy?
    Hydrogen being gaseous has highest entropy.
    Author: rikazzz Comment
    Physics
    A disk and a sphere of same radius but different masses roll on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first ?
    The sphere will reach the bottom faster than the disk. It is because the disk has a higher rotational inertia than the solid:_x000D_ I= mr²_x000D_ I is the rotational inertia where m is the mass and r is the square of distance from the axis of rotation. in the case of disk I is greater due to r and more the I, more is the rotational K.E. Then for conservation of energy Translational K.E will be less._x000D_ mgh= K.E (T) + K.E (R)_x000D_ so in case of sphere translational K.E will be more, meaning more final velocity and it will reach the bottom faster.
    Author: rikazzz Comment
    Physics
    In a vacuum, all electromagnetic waves have the same
    When traveling in a vacuum, electronic waves from the electromagnetic spectrum all travel at the same speed. Velocity is speed with direction, so they would all travel at the same velocity, relatively speaking. But frequency and wavelength are quite different.
    Author: rikazzz Comment