Physics, 14.02.2020 02:02 nessuhbae6731

Ross Ice Shelf in Antarctica. It was an approximately rectangular prism 160 km long, 40.0 km wide, and 250 m thick.
(a) What is the mass of this iceberg, given that the density of ice is 917 kg/m3 ?
(b) How much heat transfer (in joules) is needed to melt it?
(c) How many years would it take sunlight alone to melt ice this thi

Answers: 1

Show answers

Answers

Answer from: natalie2sheffield

Ross Ice Shelf in Antarctica. It was an approximately rectangular prism 160 km long, 40.0 km wide, and 250 m thick.

(a) What is the mass of this iceberg, given that the density of ice is 917 kg/m3 ?

(b) How much heat transfer (in joules) is needed to melt it?

(c) How many years would it take sunlight alone to melt ice this thick, if the ice absorbs an average of 100W/m², 12.00 h per day

The answers to the questions are as follows

(a) The mass of this iceberg is 1467200000000000 kg

(b) The heat required to melt the ice shelf is 4.93 × 10²⁰ J

(c) It would take sunlight approximately 49 years to melt the ice if the ice absorbs an average of 100 W/m² for 12.00 hours per day

Explanation:

(a) Given the dimensions as

160 km long,

40.0 km wide

250 m thick

We have the volume as volume = length × breadth × width

Therefore, volume = 160000 m × 40000 m × 250 m = 1600000000000 m³

Therefore the mass = Density × Volume = 1600000000000 m³ × 917 kg/m³ = 1467200000000000 kg

(b). The heat, H required to melt the ice is given by

(The latent heat of fusion of ice) × (mass of ice)

H = 3.36×⁵10 J Kg-1 × 1467200000000000 kg = 4.93 × 10²⁰ J

The heat required to melt the ice shelf is 4.93 × 10²⁰ J

The area surface area of the ice facing the sun = ice length × ice width = (160 km × 40 km) →

= 160 km × 1000 m/km × 40 km × 1000 m/km = 6.4 × 10⁹ m²

Therefore the heat absorbed = 100 W/m² × 6.4 × 10⁹ m² for 12 hour per day

= 6.4 × 10¹¹ W for 12 hour per day

= 6.4 × 10¹¹ J/s × 12 hr × 60 min/hr × 60 s/min = 2.7648×10¹⁶ J per day = 2.7648×10¹⁶ J/day

Therefore the number of days to melt the ice completely would be

(4.93 × 10²⁰ J)/(2.7648×10¹⁶ J/day) = 1.78 × 10⁴ days or

17831.31 days ×1/365 year/day = ‪48.8 years ≈ 49 years

Answer from: Quest

there are no contact forces mentioned on the list of choices that you've provided.

Answer from: Quest

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;

Another question on Physics

Physics, 22.06.2019 00:30

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question:

Answers: 2

Answer

Physics, 22.06.2019 08:30

What object a collides with object b and bounces back its final momentum is?

Answers: 1

Answer

Physics, 22.06.2019 08:30

Abike rider starts from rest and accelerates 28.0 meters down a slope in 5.00 seconds. what is her acceleration? select one: a. 3.21 m/sec2 b. 1.75 m/sec2 c. 9.80 m/sec2 d. 2.24 m/sec2

Answers: 3

Answer

Physics, 22.06.2019 08:40

An isolated conducting spherical shell carries a positive charge. part a which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? electric potential inside the shell is constant and outside the shell is changing as 1/r2 both the electric potential and the electric field does change with r inside and outside the spherical shell electric potential inside and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is equal to zero electric field inside and outside the shell is constant (does not change with the position r), but is not equal to zero electric field inside and outside the shell is changing as 1/r (where r is the distance from the center of the sphere) electric field inside is equal to zero and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is changing as 1/r electric field inside and outside the shell is changing as 1/r2 electric field inside is equal to zero and outside the shell is changing as 1/r2 electric field inside and outside the shell is zero electric field inside is constant and outside the shell is changing as 1/r

Answers: 3

Answer

You know the right answer?

Ross Ice Shelf in Antarctica. It was an approximately rectangular prism 160 km long, 40.0 km wide, a...

Questions