Properties of Solids & Liquids (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 27  30 of 190
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 550.00 or
Question number: 27
» Properties of Solids & Liquids » Thermal Expansion
Question
2 kg of ice at  20°C is mixed with 5 kg of water at 20°C in an insulating vessel having a negligible heat capacity. Calculate the final mass of water remaining in the container. It is given that the specific heats of water and ice are 1 kcal/kg /°C and 0.5 kcal/kg /°C while the latent heat of fusion of ice is 80 kcal/kg
Choices
Choice (4)  Response  

a.  4 kg 

b.  7 kg 

c.  2kg 

d.  6 kg 

Question number: 28
» Properties of Solids & Liquids » Heat Transfer » Radiation
Question
An ice box used for keeping eatable cold has a total wall, area of 1 meter ^{2} and a wall thickness of 5.0 cm. The thermal conductivity of the ice box is K = 0.01 joule/meter °C is filled with ice at 0° C along with eatables on a day when the temperature is 30°C. The latent heat of fusion of ice is 334 × 10 ^{3} joules/kg. The amount of ice melted in one day is (1 day = 86,400 seconds)
Choices
Choice (4)  Response  

a.  1552 gm 

b.  776 gm 

c.  11520 gm 

d.  7760 gm 

Question number: 29
» Properties of Solids & Liquids » Heat Transfer » Radiation
Question
f between wavelength λ and λ + dλ, e _{λ} and a _{λ} be the emissive and absorptive powers of a body and E _{λ} be the emissive power of a perfectly black body, then according to Kirchhoff’s law, which is true
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 30
» Properties of Solids & Liquids » Elastic Behavior
Question
The ratio of radii of two wires of same material is 2: 1. If these wires are stretched by equal forces, then the ratio of stresses produced in them will be
Choices
Choice (4)  Response  

a.  4: 1 

b.  1: 2 

c.  2: 1 

d.  1: 4 
