A solid sphere of radius (R) has total charge (2)(Q) and volume charge density (p)=(k)(r) where (r) is distance from centre. Now charges (Q) and -(Q) are placed diametrically opposite at distance (2)(a) where a is distance form centre of sphere such that net force on charge (Q) is zero then relation between a and (R) is (A) (a)=(R)/(2) (B) (a)=(R) (C) (a)=(2)(R) (D) (a)=(3)(R)/(4)

tell me brief about human reproduction​

Natural selection results with individuals that survive to reproduce to pass more of their genes in the population, exhibiting greater ______ than those who have fewer or no offspring A. Traits B. Strength C. Speed D. Attractiveness E. Fitness F. All of the above

.05 times as much as ______

what is the order of electron gain enthalpy in second period of periodic table litium, beryllium ,Boron ,carbon ,nitrogen, Oxygen fluorine ,neon​

how many base pair present in each helix of DNA​

एक साथ तीन सिक्कों को उछालने पर, 3 पूंछ पाने की संभावना का पता लगाएं

Alternating current through pure inductor and pure capacitor is wattless. Why ?

In the following list, the only pair which have different dimensions, is (A) Linear momentum and moment of a force (B) Planck's constant and angular momentum (C) Pressure and modulus of elasticity (D) Torque and potential energy

All of the following are true statements about Africa during the Middle Ages EXCEPT which one A. Islam had been introduced to Ghana by the 10th century B. The Portuguese first sailed to west Africa in the 14th century C. There were no great empires in Africa prior to European contact D. The slave trade emerged as the dominant form of commerce around the Gulf of Guinea in the 15th and the 16th centuries

Both mother and father contribute the same number of chromosomes to the child t produce. Neither normally contributes more than the other. a. True b. False