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
andrey2020 [161]
3 years ago
8

a piece of metal with a mass of 15.3 grams has a temperature of 50.0°C. When the metal is placed in 80.2 grams of water at 21.0°

C, the temperature rises by 4.3°C. What is the specific heat capacity of the metal?
Physics
2 answers:
AleksAgata [21]3 years ago
6 0

Answer:

1.21

Explanation:

Heat rise in the body happens due to heat supplied by water to the body.

Heat rise in body = m₁ c₁ ΔT₁

Where m₁ is mass of body and c₁ is its specific heat of body

Heat lost from water to the body = m₂ c₂ ΔT₂

Where m₂ is mass of water and c₂ is its specific heat of water ( c₂ =1 (since water))

Equating both:

        15.3 x c₁ x 4.3 = 80.2 x 1 x 4.3

⇒   c₁ = 80.2 / (15.3 x 4.3) = 1.21

Mila [183]3 years ago
6 0

Answer:

c₁ =  3.68 J/g°C

Explanation:

The quantity of heat Q gained by a body of mass m, specific heat capacity, c and temperature change ΔT is  Q = mcΔT. Let m₁, c₁ and m₂, c₂ represent the masses and specific heat capacities of the metal and water respectively. ΔT₂ for the water = 4.3°C. This means that its final temperature of the water after the metal has been placed in it is 21.0°C + 4.3°C = 24.3°C, which is the final temperature of the metal. So ΔT₁ for metal = 24.3°C - 50.0°C = -25.7°C.

Since heat loss equals heat gain

-m₁c₁ΔT₁ = m₂c₂ΔT₂

c₁ = -m₂c₂ΔT₂/m₁ΔT₁

c₁ = -80.2 × 4.2 × 4.3/15.3 × -25.7 = -1448.412/(-393.21) = 3.683 J/g°C

c₁ ≈  3.68 J/g°C

You might be interested in
Question 5 help please
IrinaVladis [17]

Answer:

It is another machine that helps the main machine. Hope that helps!

5 0
3 years ago
A 4.80 −kg ball is dropped from a height of 15.0 m above one end of a uniform bar that pivots at its center. The bar has mass 7.
Margarita [4]

Answer:

h = 13.3 m

Explanation:

Given:-

- The mass of ball, mb = 4.80 kg

- The mass of bar, ml = 7.0 kg

- The height from which ball dropped, H = 15.0 m

- The length of bar, L = 6.0 m

- The mass at other end of bar, mo = 5.10 kg

Find:-

The dropped ball sticks to the bar after the collision.How high will the other ball go after the collision?

Solution:-

- Consider the three masses ( 2 balls and bar ) as a system. There are no extra unbalanced forces acting on this system. We can isolate the system and apply the principle of conservation of angular momentum. The axis at the center of the bar:

- The angular momentum for ball dropped before collision ( M1 ):

                                 M1 = mb*vb*(L/2)

Where, vb is the speed of the ball on impact:

- The speed of the ball at the point of collision can be determined by using the principle of conservation of energy:

                                  ΔP.E = ΔK.E

                                  mb*g*H = 0.5*mb*vb^2

                                  vb = √2*g*H

                                  vb = ( 2*9.81*15 ) ^0.5

                                  vb = 17.15517 m/s

- The angular momentum of system before collision is:

                                  M1 = ( 4.80 ) * ( 17.15517 ) * ( 6/2)

                                  M1 = 247.034448 kgm^2 /s

- After collision, the momentum is transferred to the other ball. The momentum after collision is:

                                  M2 = mo*vo*(L/2)

- From principle of conservation of angular momentum the initial and final angular momentum remains the same.

                                 M1 = M2

                                 vo = 247.03448 / (5.10*3)

                                 vo = 16.14604 m/s

- The speed of the other ball after collision is (vo), the maximum height can be determined by using the principle of conservation of energy:

                                  ΔP.E = ΔK.E

                                  mo*g*h = 0.5*mo*vo^2

                                  h = vo^2 / 2*g

                                  h = 16.14604^2 / 2*(9.81)

                                  h = 13.3 m

3 0
3 years ago
A 3 mm inside diameter tube is placed in a fluid with a surface tension of 600 mN/m and density of 3.7 g/cm3. The contact angle
Aleks04 [339]

Answer: The height of the fluid rise is 0.01m

Explanation:

Using the equation

h = (2TcosѲ )/rpg

h= height of the fluid rise

diameter of the tube =3mm

radius of the tube= 3/2 =1.5mm=0.0015

T= surface tension = 600mN/m=0.6N/m

Ѳ = contact angle = 60^oC

p= density =3.7g/cm3= 3700kg/m3

g= acceleration due to gravity =9.8m/s2

h = ( 2*0.6*0.5)/(0.0015*3700*9.8)

h = 0.6/54.39

h= 0.01m

Therefore,the height of the fluid rise is 0.01m

8 0
3 years ago
What symbol is used to represent being dissolved in water?
miss Akunina [59]
(aq)
This means it’s aqueous (dissolved in water)
8 0
3 years ago
Read 2 more answers
A weather balloon slowly expands as energy is transferred as heat from the outside If the average net pressure is air. 1.5 x 103
Anni [7]
There is only one pressure this situation would be a "constant pressure" process. The work done by expanding gas is.
=p(delta V) = (1.5e3)(5.e3)(5.4e-5) N/m^2xm^3) N/m2xm^3= 8.1e-2 N-m ANS
7 0
3 years ago
Read 2 more answers
Other questions:
  • Two forces act on an object. The first force has a magnitude of 17.0 N and is oriented 48.0° counterclockwise from the x ‑axis,
    9·1 answer
  • If the frequency of a given wave increases,what happens to the wavelength?
    15·2 answers
  • Which of these BEST describes the term ecliptic? A. the circle where "Earth meets the sky" B. the change in azimuth and altitude
    15·2 answers
  • What energy does a galloping horse and a speeding bullet represent
    12·2 answers
  • If two carts collide, what type of collision will conserve both momentum and kinetic energy?
    12·2 answers
  • How can two strengths be added together
    12·1 answer
  • Astronomersestimatethata2.0-km-diameterasteroidcollides with the Earth once every million years. The collision could pose a thre
    7·2 answers
  • Which piece of equipment would give the MOST accurate measurement of 45 mL of a liquid? A) A 100 mL graduated cylinder B) A 50 m
    14·2 answers
  • A skydiver, with a mass of 60 kg is falling at a velocity of 30 m/s. Calculate his kinetic energy.
    12·1 answer
  • In terms of energy transfer, how is a rise in
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!