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
Bond [772]
3 years ago
10

A hot (70°C) lump of metal has a mass of 250 g and a specific heat of 0.25 cal/g⋅°C. John drops the metal into a 500-g calorimet

er containing 75 g of water at 20°C.
The calorimeter is constructed of a material that has a specific heat of 0.10 cal/ g⋅°C.

When equilibrium is reached, what will be the final temperature? cwater = 1.00 cal/g⋅°C.

a. 114°Cb. 72°Cc. 64°Cd. 37°C
Physics
1 answer:
Gnom [1K]3 years ago
6 0

Answer:

d. 37 °C

Explanation:

m_{m} = mass of lump of metal = 250 g

c_{m} = specific heat of lump of metal  = 0.25 cal/g°C

T_{mi} = Initial temperature of lump of metal = 70 °C

m_{w} = mass of water = 75 g

c_{w} = specific heat of water = 1 cal/g°C

T_{wi} = Initial temperature of water = 20 °C

m_{c} = mass of calorimeter  = 500 g

c_{c} = specific heat of calorimeter = 0.10 cal/g°C

T_{ci} = Initial temperature of calorimeter = 20 °C

T_{f} = Final equilibrium temperature

Using conservation of heat

Heat lost by lump of metal = heat gained by water + heat gained by calorimeter

m_{m} c_{m} (T_{mi} - T_{f}) = m_{w} c_{w} (T_{f} - T_{wi}) +  m_{c} c_{c} (T_{f} - T_{ci}) \\(250) (0.25) (70 - T_{f} ) = (75) (1) (T_{f} - 20) + (500) (0.10) (T_{f} - 20)\\T_{f} = 37 C

You might be interested in
In the formula used to solve problems related to the first law of thermodynamics what does Q represent?
KonstantinChe [14]
The heat <span>Q(in)</span> supplied to the system in one stage of the cycle, minus the heat <span>Q(out)</span> removed from it in another stage of the cycle; plus the work added to the system <span>W(in)</span> equals the work that leaves the system <span>W(<span>out)</span></span>
4 0
3 years ago
When the amount of water in a river increases so much that the river overflows its channel, a flood occurs.True or false
suter [353]

That's true, and there are also other mechanisms that can also create floods.

4 0
3 years ago
If a car traveled 60 m in 30 s, what is the velocity?*
klemol [59]

Answer:

6.56168

Explanation:

8 0
3 years ago
What relationship exists between two variables when their ratio is a constant?
Brrunno [24]

If two variables (let us say x and y) have ratios that is constant, therefore we can say that the two variables are directly proportional to each other or in other terms they have a direct variation type of relationship. This takes the form:

x / y = k

<span>where k is a constant of proportionality</span>

6 0
3 years ago
3. What is the kinetic energy of a 1300 kg car moving at 26.3 m/s?
Alexxx [7]

Answer:K.E=449598.5j

Explanation:

Kinetic energy of a moving car=1/2mv^2

Where m is the mass of the car

And V is the velocity of the car

K.E=1/2 ×1300×26.3^2

K.E=449598.5j

3 0
3 years ago
Other questions:
  • The bigclaw snapping shrimp shown in (Figure 1) is aptly named--it has one big claw that snaps shut with remarkable speed. The p
    13·1 answer
  • What molecular geometry would be expected for f2 and hf?
    8·1 answer
  • What does it mean for water to have a high heat capacity
    11·1 answer
  • WHAT IS THE KE OF 2KG BALL AT SPEED 5M/S AT 40M TALL?
    14·1 answer
  • What is the passenger's apparent weight at t=1.0s?
    15·2 answers
  • What is the relationship in which the ratio of the manipulated variable and the responding variable is constant? A. inverse prop
    10·1 answer
  • Suppose the sphere is electrically neutral. Is it attracted to
    9·1 answer
  • 8 POINTS EASY MULTIPLE CHOICE, BRAINLIST FOR CORRECT ANSWER:
    13·1 answer
  • A 30-mm-diameter copper rod is 1 m long with a yield strength of 70 MPa. Determine the axial force necessary to cause the diamet
    14·1 answer
  • Which of the following has the greatest magnitude?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!