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The velocity of a bullet is reduced from $200 \text{ m/s}$ to $100 \text{ m/s}$ while travelling through a wooden block of thickness $10 \text{ cm}$. The retardation, assuming it to be uniform, will be:
Mental retardation in man occurs due to:
A ball is thrown vertically upwards. Which of the following plots represents the speed-time graph of the ball during its height if the air resistance is not ignored?
In vitro fertilization is a technique that involves transfer of which one of the following into the fallopian tube?
$\alpha$-D-glucose and $\beta$-D-glucose are:
MTP is:
A block A of mass $m_1$ rests on a horizontal table. A light string connected to it passes over a frictionless pulley at the edge of the table and from its other end, another block B of mass $m_2$ is suspended. The coefficient of kinetic friction between block A and the table is $\mu_k$. When block A is sliding on the table, the tension in the string is:
In hydrogen atom, what is the de Broglie wavelength of an electron in the second Bohr orbit? [Given that Bohr radius, $a_0 = 52.9$ pm]
Free-central placentation is found in?
A certain plant homozygous for yellow seeds and red flowers was crossed with a plant homozygous for green seeds and white flowers. The F1 plants had yellow seeds and pink flowers. The F1 plants were selfed to get F2 progeny. Assuming independent assortment of the two characters, how many phenotypic categories are expected for these characters in the F2 generation?
What is the full form of IUDs?
A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass = 5.98 × 10²⁴ kg) have to be compressed to be a black hole?
A body starts from rest. What is the ratio of the distance travelled by the body during the 4th and 3rd second?
MTP was legalised in India in:
The displacement of a particle, moving in a straight line, is given by $s = 2t^2 + 2t + 4$ where $s$ is in metres and $t$ in seconds. The acceleration of the particle is:
Natural methods for contraception work on the principle of:
Which of the following is true for nucleolus?
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): A father will never pass the gene for haemophilia to his sons. Reason (R): Haemophilia is sex-linked (X-linked recessive trait). In the light of the above statements, choose the correct answer from the options given below:
The site of perception of light in plants during photoperiodism is
Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?