1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kherson [118]
3 years ago
11

A 2.7 kg block of ice at a temperature of 0.0◦C and an initial speed of 6.5 m/s slides across a level floor. If 3.3 × 105 J are

required to melt 1.0 kg of ice, how much ice melts, assuming that the initial kinetic energy of the ice block is entirely converted to the ice’s internal energy? Answer in units of kg.
Physics
1 answer:
bixtya [17]3 years ago
4 0

Answer:

The mass of ice melted is: 1.728*10^{-4}(Kg)

Explanation:

We need to remember that the latent heat of fusion is related as:L_{f} =\frac{Q}{m}, where Lf is the latent heat of fusion, Q is the amount of heat and m is the mass, and when there is a change of phase, e.g ice into liquid water, the temperature remains constant during this process. Now we calculate the kinetic energy of the block as: E_{k}=\frac{m*v^{2} }{2}=\frac{2.7*6.5^{2} }{2} =57.02(Joules), so this energy is used to change ice into liquid water, and knowing L_{f}=3.3*10^{5}(Joules/Kg), then we can replace in the equation the latent heat of fusion and get the mass of ice melted as:m=\frac{L_{f} }{Q} =\frac{57.04}{3.3*10^{5} } =1.728*10^{-4}(Kg)

You might be interested in
Plzzzz helpppppppo Near the end of the life cycle of a star why does the star lose its size
gavmur [86]

Answer:

Because the energy is waning

Explanation: hope this helps

8 0
3 years ago
The production of electricity from fission nuclear reactions in power plants is regulated by controlling
Anna007 [38]
D. or "the amount of neutrons available. 
3 0
3 years ago
Read 2 more answers
PLEASE HELP!! At what temperature will silver have a resistivity that is four times the resistivity of tungsten at room temperat
Svetach [21]
Consider 20 deg.C. as room temperature.

From tables,
Silver has a resistivity of  1.6*10^-8 ohm-m at 20 deg.C, and it increases by 0.0038 ohm-m per deg.K increase.
Therefore if the temperature rise above 20 deg.C is T, then silver will have resistivity of
1.6*10^-8(1 + 0.0038T) ohm-m

At room temperature, the resistivity of tungsten (from tables) is 5.6*10^-8.

The resistivity of silver will be 4 times that of tungsten (at room temperature) when
1.6*10^-8(1 + 0.0038T) = 4*5.6*10^-8
1 + 0.0038T = 14
T = 13/.0038 = 3421 deg.K approx

Answer: 20 + 3421 = 3441 °C
4 0
3 years ago
A car travels on a straight, level road. (a) Starting from rest, the car is going 38 ft/s (26 mi/h) at the end of 4.0 s. What is
lbvjy [14]

Answer:

a)9.5\frac{ft}{s^2}\\ b) 12.66\frac{ft}{s^2}

Explanation:

A body has acceleration when there is a change in the velocity vector, either in magnitude or direction. In this case we only have a change in magnitude. The average acceleration represents the speed variation that takes place in a given time interval.

a)

a_{avg}=\frac{\Delta v}{\Delta t}\\a_{avg}=\frac{v_{f}-v_{i}}{t_{f}- t_{i}}\\a_{avg}=\frac{38\frac{ft}{s}-0}{4 s- 0}=9.5\frac{ft}{s^2}\\

b)

a_{avg}=\frac{\Delta v}{\Delta t}\\a_{avg}=\frac{v_{f}-v_{i}}{t_{f}- t_{i}}\\a_{avg}=\frac{76\frac{ft}{s}-38\frac{ft}{s}}{7 s- 4s}\\a_{avg}=\frac{38\frac{ft}{s}}{3s}=12.66\frac{ft}{s^2}

8 0
3 years ago
How much is the velocity of a body when it travels 600m in 5 minutes?( with the full process)​
Tcecarenko [31]
Its average speed, pretending that it traveled at a constant speed, is

v = s / t

= 600 m

5 x 60 s

= 2 m/s

but to be a velocity it needs a direction as well as a speed.

( Sorry. Can’t find a division line to put between the 600 m and the 5 x 60 s )
6 0
3 years ago
Other questions:
  • Why are the Inner Planets composed mostly of rock and the Outer Planets<br> composed mostly of gas
    11·1 answer
  • A 7.9 g bullet leaves the muzzle of a rifle with ayvaci (na25565) – Chapter 4 Basics – balantic – (APPhysPd4Balant) 2 a speed of
    7·1 answer
  • wo ladybugs of the same mass are on a record that is on a record player. The record player is turned on and it reaches a constan
    5·1 answer
  • Convert 250 mm into km
    10·1 answer
  • Erosion and Weathering can cause changes in earths surface but how does erosion alone changes the earth surface.
    5·1 answer
  • A flywheel with radius of 0.300 m starts from rest and accelerates with a constant angular acceleration of 0.400 rad/s2.For a po
    14·1 answer
  • Please Help Me!!!
    7·1 answer
  • Why are the alkali metals likely to react with group 17 elements?
    7·1 answer
  • In un lento processo di riscaldamento di 200 g di H2O da 60 gradi a 100 gradi evaporano 10 g di H2O. Assumendo per il calore lat
    8·1 answer
  • HELP PLEASE!!!!
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!