आनुवंशिकता एवं जैव विकास - L5 | लिंग निर्धारण | Chapter 9 | कक्षा 10 NCERT विज्ञान | Pooja Mam

A person buys 5 tables and 9 chairs for ₹15,400. He sells the tables at 10% profit and chairs at 20% profit. If his total profit on selling all the tables and chairs is ₹2,080, what is the cost price of 3 chairs? / एक व्यक्ति 5 मेज और 9 कुर्सियों को 15,400 रुपये में ख़रीदा | उसने मेजों को 10% लाभ पर तथा कुर्सियों को 20% लाभ पर बेच दिया | यदि सभी मेज एवं कुर्सियों को बेचकर उसका कुल लाभ 2,080 रुपये का था, तो 3 कुर्सियों का क्रय मूल्य कितना है ?

Under the action of a constant voltage U , a capacitor of capacitance C =10^(-11) F included in the circuit shown in Fig. 113 is charged to q_(1) = 10^(-9) C . The inductance of the coil, is L = 10^(-5) H , and the resistance of the resistor is R = 100 Omega . Determine the amplitude q_(0) of steadystate oscillations of the charge on the capacitor at resonance if the amplitude of the external sinusoidal voltage is U_(0) = U .

If L = 39.5 , Delta_(1) = 6 , Delta_(2) = 9 and c = 10 , then find the mode of the data .

Driver of a truck gets his steel petrol tank filled with 75 L of petrol at 10^(@)C . If a alpha_("steel") is 12 xx 10^(-6)//.^(@)C and gamma_("pet") is 9.5 xx 10^(-4)//.^(@)C the overflow of petrol at 30^(2)C is -

In a sereis L-C-R circuit, C = 10^(-11) Farad, L = 10^(-5) Henry and R = 100 Ohm, when a constant D.C voltage E is applied to the circuit, the capacitor acquires a charge 10^(-9)C . The D.C source is replaced by a sinusoidal voltage source in which the peak voltage E_(0) is equal to the constant D.C volatge E. At resonance the peak value of the charge acquired by the capacitor will be :

Consider the marks, out of 100, obtained by 51 students of a class in a test, given in Table 14.9. M a r k s"N u m b e r o f S t u d e n t s"0-10 5 10-20 10 20-30 4 30-40 6 40-50 7 50-60 3 60-70 2 70-80 2 80-90 3 90-100 9Tot a l 51 Draw a freque

9 xx 10^(22) atoms of Ar and n moles of O_(2) are kept in a vessel of capacity 5L at 1 atm and 27^(@)C . (Consider N_(A)=6 xx 10^(23), R=0.0821 L atm "mol"^(-1)K^(-1) ) : Find the mass of O_(2) in vessel:

9 xx 10^(22) atoms of Ar and n moles of O_(2) are kept in a vessel of capacity 5L at 1 atm and 27^(@)C . (Consider N_(A)=6 xx 10^(23), R=0.0821 L atm "mol"^(-1)K^(-1)) : If all the O_(2) in vessel , then: