Science All General Science Aptitude

The force of attraction between two objects is called the C. gravitational force. Gravitational force is the force of attraction between two masses and is responsible for phenomena such as the weight of an object and the motion of celestial bodies. The other options refer to different types of forces: centripetal force is directed toward the center of circular motion, electromagnetic force involves the interaction of charged particles, and centrifugal force is a pseudo-force that appears in a rotating reference frame.

An ultrasonic sound wave has a frequency higher than the upper limit of human hearing, which is generally considered to be around B. 20000 Hz (20 kHz). Ultrasonic waves have frequencies greater than 20,000 Hz and are beyond the audible range for humans.

In hypermetropia (farsightedness), the image is formed behind the retina. Hypermetropia occurs when the eyeball is too short or the cornea has too little curvature, causing light to focus behind the retina instead of directly on it. To correct hypermetropia, converging lenses (convex lenses) are used to bring the image forward onto the retina.

The elements arranged in the order of their increasing atomic number can be found in A. The Modern Periodic Table. In the Modern Periodic Table, the elements are arranged based on their atomic number, which is the number of protons in an atom. This arrangement provides a more accurate reflection of the periodicity of the elements compared to earlier classification systems. Mendeleev's Periodic Table, Newland's Law of Octaves, and Dobereiner's Triads are older classification systems that did not account for the concept of atomic number.

The statement that is NOT linked to the cerebrum is:

D. It is the largest part constituting 60% of the brain.

The cerebrum is indeed the largest part of the brain, but it constitutes about 80% of the brain, not 60%.

The conversion of a solid directly into its vapor is called D. Sublimation. Sublimation is a phase transition where a substance goes from a solid state to a gaseous state without passing through the liquid state.

Testosterone in men is primarily produced by the C. Testes. The testes are male reproductive organs that produce testosterone, the primary male sex hormone.

The sex of the children is determined by the combination of genetic material inherited from both the B. father and C. mother. Specifically, the sex chromosomes inherited from each parent (XX from the mother and either X or Y from the father) determine the biological sex of the offspring.

The reading on the spring balance will show the least weight under the condition described in option:

B. When the stone is completely submerged in the water in a beaker.

When the stone is completely submerged in water, it experiences a buoyant force equal to the weight of the water it displaces. This buoyant force reduces the effective weight of the stone, resulting in a lower reading on the spring balance.

The equation that represents the position-time relation is:

B. s = ut + 1/2at²

Here:

s is the displacement or position,

u is the initial velocity,

t is the time elapsed,

a is the acceleration.