Doubtly
@Doubtly · Joined Feb 2021
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- A block of mass m, lying on a smooth horizontal surface, is attached to a spring (of negligible mass) of spring constant k. the correct answer is option C) Fover√(mk) Detailed solution:: Maximum speed is at mean position (equilibrium). F = kx x=Fover k W_F + W_sp... 1
- The line x + y = 2 is tangent to the curve x2 = 3 - 2y at its point x²= 3 – 2y 2x = 0 – 2 (dy / dx) ⇒ dy / dx = – x The slope of the tangent of the curve is -x. From the given information of the line, the slo... 1
- If sec 4θ − sec 2θ = 2, then find the general value of θ Answer is θ=nπ+π/2 or nπ/5+π/2 Explanation:: Video Solution:: https://youtu.be/pWg7L988Dt8 1
- The greatest coefficient in the expansion of (1+x) 2n+2 is correct option is B) (2n+2)!over [(n+1)!]² 1
- 1 gram of a carbonate (M2CO3) on treatment with excess HCl produces 0.01186 mole of CO2, The molar mass of M2CO3 in g mol-1 is Ans:- 84.3 g/mole 4) is correct option The equation for the above reaction is as follows:- M2CO3 + 2HCl-> 2MCl+CO2+2H2O This shows that , 1... 1
- Select the correct stability order of the conformation /Rotamers/ Rotational isomers of Ethane Molecule The correct answer is (c) solution:: The isomers which can be produced by the free rotation about single bond are known as conformation /Rot... 1
- If z1, z2 are complex numbers such that, 2z13z12z13z1is purely imaginary number, then finds |z1−z2z1+z2z1−z2z1+z2 | since , 2z₁/3z₁ is purely imaginary 2z₁/3z₁ == λ for some λ ∈ R z₁over z₂= 3 λ over2i Now , 2
- If z is a complex number, then the minimum value of |z| + |z − 1| is ______. First, note that |-z|=|z| and |z1 + z2| ≤ |z1| + |z2| Now |z| + |z-1| = |z| + |1 - z| ≤ |z + (1 - z)| = |1| = 1 Hence, minimum value of |z|... 2
- If (1 + i) (1 + 2i) (1 + 3i) ….. (1 + ni) = x + iy, then what is 2 * 5 * 10….(1 + n2) is equal to? option C) is the correct detailed solution :: We have (1 + i) (1 + 2i) (1 + 3i) ….. (1 + ni) = x + iy …..(i) (1 − i) (1 − 2i) (1 − 3i) ….. (... 1
- The difference between angular speed of minute hand and second hand of a clock is B) is the correct answer 59π/1800 rad/s Explanation:: Angular speed of minute hand ω_m=2πover 60×60 Angular speed of second hand ω _s =2πove... 1
- Cos190.cos10+sin190.sin10= a)2 b)0 c)-1 d)1 The correct answer is c)-1 Detailed solution 1
- The value of cos π/2^2.cosπ/2^3..... .cosπ/2^10.sinπ/2^10 The correct answer is option B)1/512 Detailed solution 1
- The sum of all values of θ ∈ (0, π/2) satisfying sin2 2θ + cos4 2θ = 3/4 is Your answer is here 2
- If 5(tan 2 x−cos 2 x)=2cos2x+9, then the value of cos4x is See the below image , 2
- Question and answer with APJ Abdul kalam | Q1 जब हम जानते हैं कि अंतरिक्ष अनंत है तो अंतरिक्ष की खोज का क्या उपयोग है? Ans } हम आपके ज्ञान का विस्तार करने के लिए जांच की भावना में अंत... 1
- Question and answer by Apj Abdul kalaam By Ajink Gupta Brainiak.in 1
- p and q are the points on the sides AB and AC respectively of a triangle ABC, Here is Your answer hit a like on answer thank you 2
- How do I get 200 plus marks in the JEE Main 2021? 200 is not too difficult in JEE Main. U just need to clarify your concepts. .200 means approximately 66 in each subject. Hardwork and clear... 1