What amount of ice can be melted by 4000 cal of heat ?
A) 20 g
B) 30 g
C)40g
D)50g
1 Answers
A hollow sphere which has internal and external diameter as 16 cm and 14 cm respectively is melted into a cone with a height of 16 cm. Find the diamet
Correct Answer - 13 cm
2 Answers 1 views
Calculate the amount of heat energy to be supplied to convert 2 kg of ice at 0 °C completely into water at 0 °C if latent heat of fusion
Mass (m) = 2 kg = 2 × 103 g. latent heat of fusion for ice (L) = 80 cal/g. To find: Heat energy (Q) Formula: Q = mL From formula, Q = 2 × 103 ×...
2 Answers 1 views
The latent heat of fusion of a solid ‘ substance of mass “m” is L. The required amount of heat to change solid phase to liquid phase is ……………… cal.
Correct option is A) Q = mL
2 Answers 1 views
The amount of heat needed to change from ice to water at 0° C is 80 cal. Find the mass of the substance taken.
Correct option is B) 1 g
2 Answers 3 views
Calculate the amount of heat required to convert 5 gm of ice at 0° C to water at 100° C.
Correct option is A) 900 cal
2 Answers 1 views
Calculate the amount of heat required to convert 100 g of ice at – 5° C to 0° C.
Correct option is B) 250 cal
2 Answers 1 views
The amount of heat energy absorbed by ice at E
Correct option is D) 730 cal
2 Answers 1 views
A piece of ice falls from a height h so that it melts completely. Only one — quarter of the heat produced is absorbed by the ice and all energy
(A) 136 km When the piece of ice falls from the height h, it possesses potential energy, mgh. This P.E. is converted to heat energy. ∴ Q = mgh But only \(\frac{1^{th}}{4}\) of it is absorbed...
2 Answers 1 views
A potential difference of 20 V is applied across the ends of a coil. The amount of heat generated in it is 800 cal/s. The value of resistance
Correct option is: (C) 0.12 Ω
2 Answers 1 views
A conical cup when filled with ice-cream forms a hemispherical shape on its open end. Findthe volume of the ice-cream, if the radius of the base of th
Correct Answer - C Requierd volume = Volume of cone + Volume of sphere.
2 Answers 2 views