150, 290, 560, 1120, 2140, 4230, 8400

38 people donated to an organisation working for differently abled persons. The amount in rupees were as follows:101 500 401 201 301 160 210 125 175 190 450 151 101 351 251 451 151 260 360 410 150 125 161 195 351 170 225 260 290 310 360 425 420 100 105 170 250 100 (i) By taking classes 100-149, 150-199, 200-249...prepare grouped frequency distribution table.

Pass Journal entries to rectify the errors in the following cases: (i) A purchases of goods from David amounting to Rs. 150 has been wrongly passed through the Sales Book. (ii) A credit sale of goods of Rs. 120 to Peter has been wrongly passed through the Purchases Book. Rs. 200, salary paid to Cashier, Bimal, stands wrongly debited to his Personal Account. (iv) A credit sale of Rs. 4,230 to Krishan entered as purchase from Kishan Rs. 4,320. (v) Ramesh's Account was credited with Rs. 840 twice instead of once. [Hint: (iv) Dr. Krishan: Rs. 4,230, Kishan: Rs. 4,320 Cr. Sales A/c: Rs. 4,230, Purchase A/c: Rs. 4,320.]

A solid copper sphere of dimater 10mm is cooled to temperature of 150K and is then placed in an enclousure at 290K Assuming that all interchange of heat is by radiation, calculate the initial rate of rise of temperature of the sphere The sphere may be treated as a black body rho_(copper) =8.93xx 10^(3)kg//m^(3) s = 3.7xx10^(2) Jkg^(-2) K^(-1) , sigma = 5.7 xx 10^(8) Wm^(-2) K^(-4) .

A solid copper sphere of dimater 10mm is cooled to temperature of 150K and is then placed in an enclousure at 290K Assuming that all interchange of heat is by radiation, calculate the initial rate of rise of temperature of the sphere The sphere may be treated as a black body rho_(copper) =8.93xx 10^(3)kg//m^(3) s = 3.7xx10^(2) Jkg^(-2) K^(-1) , sigma = 5.7 xx 10^(8) Wm^(-2) K^(-4) .

An elevator cab that weighs 29.0 kN moves upward. What is the tension in the cable if the cab's speed is (a)increasing at a rate of 1.50" m"//"s"^(2) and (b) decreasing at a rate of 1.50" m"//"s"^(2) ?