Question
In: Physics
There are two ice cubes each of mass 80 grams and temperature –15 Celsius. A person...
There are two ice cubes each of mass 80 grams and temperature –15 Celsius. A person rubs them together applying a force of 20 Newtons on each ice cube. Assume the coefficient of kinetic friction between them is .03 and their width is 4.5 cm. [Assume all the heat given off by friction goes into melting the ice cubes]
a) How many times should the person rub them so that they completely melt?
b) How many times should the person rub them so they reach 0 Celsius but don’t melt?
the answer should be the following: a) 1,079,555.6 times b) 92,888.9 times
Solutions
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genius_generous answered 2 years agoRelated Solutions
30 grams of ice at -5 Celsius melt while being left at room temperature of 28...
30 grams of ice at -5 Celsius melt while being left at room
temperature of 28 Celsius. After melting its temperature rises to
28 Celsius. Determine the total change of entropy of the
environment.
[Cice = .5 cal/g.C, Lf = 79.6 cal/gram] 1 calorie = 4.184 J
30 grams of ice at -5 Celsius melt while being left at room temperature of 28...
30 grams of ice at -5 Celsius melt while being left at room
temperature of 28 Celsius. After melting its temperature
rises to 28 Celsius. Determine the total change of
entropy of the ice.
[Cice = .5 cal/g.C, Lf = 79.6 cal/gram] 1
calorie = 4.184 J
Group of answer choices
a) 53.11 J/K
b) 34.68 J/K
c) 38.27 J/K
d) 44.22 J/K
e) 49.97 J/K
50.0 grams of gold at a temperature of 85 degrees Celsius is added to a Styrofoam...
50.0 grams of gold at a temperature of 85 degrees Celsius is
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The cup of water is initially at a temperature of 25 degrees
Celsius and the final equilibrium temperature of the water and gold
mixture is 29 degrees Celsius. Calculate the specific heat of the
gold. The specific heat of water is 4.18 J/g degrees Celsius.
Please show the work too! I would greatly appreciate it!
Calculate the final temperature of a mixture of 350g of ice initially at -18 degrees Celsius...
Calculate the final temperature of a mixture of 350g of ice
initially at -18 degrees Celsius and 237g of water initially at 100
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Four ice cubes at exactly 0 ∘C with a total mass of 51.5 g are combined...
Four ice cubes at exactly 0 ∘C with a total mass of 51.5 g are
combined with 130 g of water at 85 ∘Cin an insulated container.
(ΔH∘fus=6.02 kJ/mol, cwater=4.18J/g⋅∘C)
If no heat is lost to the surroundings, what is the final
temperature of the mixture?
Four ice cubes at exactly 0 ∘C with a total mass of 53.5 g are combined...
Four ice cubes at exactly 0 ∘C with a total mass of 53.5 g are
combined with 120 g of water at 75 ∘C in an insulated container.
(ΔH∘fus=6.02 kJ/mol, cwater=4.18J/g⋅∘C) Part A If no heat is lost
to the surroundings, what is the final temperature of the mixture?
Express your answer using two significant figures.
382 grams of ice with an initial temperature of −25.0 °? is placed in a styrofoam...
382 grams of ice with an initial temperature of −25.0
°? is placed in a styrofoam
cup (ignore the mass of the cup for this problem) containing 275 mL
of lemonade at
an initial temperature of 22.0 °?. Assume the density and specific
heat of lemonade
are the same as liquid water. What is the final temperature of the
system? If the final
temperature is zero, how much ice melts?
(a) You took two 50-g ice cubes from your −15 C kitchen freezer and placed them...
(a) You took two 50-g ice cubes from your −15 C kitchen freezer
and placed them in 200 g of water in a thermally insulated
container. If the water is initially at 25 C, what is the final
temperature at thermal equilibrium? (b) What is the final
temperature if only one ice cube is used? Hint: Watch out for the
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A person with mass m1 = 80 kg person climbs a uniform ladder with mass m2...
A person with mass m1 = 80 kg person climbs a uniform ladder
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When the person climbs 7.0 m from the base of the ladder, the
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B)Find the force of the wall Fw...
A 5-gram ice cube at -2 degrees Celsius is dropped into 60 grams of liquid water...
A 5-gram ice cube at -2 degrees Celsius is dropped into 60 grams
of liquid water at 12 degrees Celsius. If the ice and water are
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