If suddnly the gravitational force of attraction between earth and a satellite revolving around it becomes zero, then satellaite will:
If a body looses half of its velocity on penetrating 3 cm in a wooden block, then how much will it penetrate more before coming to rest?
From a building two balls A and B are thrown such that A is thrown upwards and B is thrown downwards (both vertically). if Va and Vb are their respective velocity on reaching the ground
A ball whoose Kinetic Energy is E, is projected at an angle of 45 degree to the horizontal. The kinetic energy of the ball at the highest point of its flight will be:
The minimum velocity (in ms-I) with which a car driver must traverse a flat curve of radius 150 m and coefficient of friction 0.6 to avoid skidding is :
Initial angular velocity of a circular disc of mass M is . Then two small spheres of mass m are attached gently to two diametrically opposite points on the edge of the disc. What is the final angular velocity of the disc?
The part of a transistor which is most heavily doped to produce large number of majority carriers is
If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should :
Cooking gas containers are kept in a lorry moving with uniform speed. The temperature of the gas molecules inside will :
The kinetic energy needed to project a body of mass m from the earth's surface (radius R) to infinity is :
The power factor of an AC circuit having resistance R and inductance L (connected in series) and an angular velocity (r) is:
Length of a string tied to two rigid supports is 40 cm. Maximum length (wavelength in cm) of a stationary wave produced on it, is:
If there are n capacitors in parallel connected to V volt source, then the energy stored is equal to
If No is the original mass of the substance of half-life period t1/2 = 5 years, then the amount of substance left after 15 years is:
If theta I is the inversion temperature, theta n is the neutral temperature, theta c is the temperature of the cold junction then :
Correct the following statements: (a) Surgical methods of contraception prevent gamete formation. (b) All sexually transmitted diseases are completely curable. (c) Oral pills are very popular contraceptives among the rural women. (d) In E. T. techniques, embryos are always transferred into the uterus.
Correct the following statements:
(a) Surgical methods of contraception prevent gamete formation.
(b) All sexually transmitted diseases are completely curable.
(c) Oral pills are very popular contraceptives among the rural women.
(d) In E. T. techniques, embryos are always transferred into the uterus.
(a) Abortions could happen spontaneously too. (True/False)
(b) Infertility is defined as the inability to produce a viable offspring and is always due to abnormalities/defects in the female partner. (True/False)
(c) Complete lactation could help as a natural method of contraception. (True/False)
(d) Creating awareness about sex related aspects is an effective method to improve reproductive health of the people. (True/False)
Do you think that reproductive health in our country has improved in the past 50 years? If yes, mention some such areas of improvement.
Suggest the aspects of reproductive health which need to be given special attention in the present scenario
Calculate the drift velocity of electrons in a copper wire of cross-sectional area 1 mm2 when a current of 2.5 A flows through it.
How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?
How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
Identify True/False statements. Correct each false statement to make it true.
(a) Androgens are produced by Sertoli cells. (True/False)
(b) Spermatozoa get nutrition from Sertoli cells. (True/False)
(c) Leydig cells are found in ovary. (True/False)
(d) Leydig cells synthesise androgens. (True/False)
(e) Oogenesis takes place in corpus luteum. (True/False)
(f) Menstrual cycle ceases during pregnancy. (True/False)
(g) Presence or absence of hymen is not a reliable indicator of virginity or sexual experience. (True/False)