A stationary object at 4° C and weighing 3.5 kg falls from a height of 2000m on a snow mountain at 0oC . If the temperature of the object just before hitting the snow is 0oC and the object comes to rest immediately, then the object will melt (Use, g=10 ms- 2 and latent heat of ice =3.5× 105Jkg- 1 )

Question

A stationary object at 4° C and weighing 3.5 kg falls from a height of 2000m on a snow mountain at 0oC . If the temperature of the object just before hitting the snow is 0oC and the object comes to rest immediately, then the object will melt (Use, g=10 ms- 2 and latent heat of ice =3.5× 105Jkg- 1 ) (A) 2 kg of ice (B) 200 g of ice (C) 20 g ice (D) 2 g of ice

Tardigrade Admin · Accepted Answer

Suppose m kg of ice melts then by using underset(. J o u l e s .)W= underset(. J o u l e s .)H Mgh=mL 3.5× 10× 2000=m× 3.5× 105 m=0.2 kg=200 g

$2 k g$ of ice

$200 g$ of ice

$20 g$ ice

$2 g$ of ice

Suppose $m k g$ of ice melts then by using
$(J o u l es) W = (J o u l es) H$
$M g h = m L$
$3.5 \times 10 \times 2000 = m \times 3.5 \times 1 0^{5}$
$m = 0.2 k g = 200 g$

2kg of ice

200g of ice

20g ice

2g of ice

Suppose mkg of ice melts then by using (Joules)W​=(Joules)H​ Mgh=mL 3.5×10×2000=m×3.5×105 m=0.2kg=200g

$2 k g$ of ice

$200 g$ of ice

$20 g$ ice

$2 g$ of ice

Suppose $m k g$ of ice melts then by using
$(J o u l es) W = (J o u l es) H$
$M g h = m L$
$3.5 \times 10 \times 2000 = m \times 3.5 \times 1 0^{5}$
$m = 0.2 k g = 200 g$