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
Svet_ta [14]
3 years ago
8

Find the specific heat of a substance that requires 8000 J of energy to heat up 400g by 20 C?

Physics
1 answer:
monitta3 years ago
7 0

Answer:

c=1\ J/g^\circ C

Explanation:

Given that,

Heat required, Q = 8000 J

Mass, m = 400 g

The change in temperature, \Delta T = 20^{\circ}

The heat required due to change in temperature is given by :

Q=mc\Delta T\\\\c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{8000 }{400\times 20}\\\\c=1\ J/g^\circ C

So, the specific heat of the substance is 1\ J/g^\circ C

You might be interested in
According to Newtons third law of motion when one object exerts a force on a second object what is true about the forces?
fomenos

Answer:

D.They are equal in magnitude and opposite in direction

Explanation:

  • Newton's third law states that the action force is always associated with a reaction force.
  • When a body 'A' exerts a force on body 'B', it is called the force of action.
  • When the body 'B' in turn resist the force of 'A' is called the reaction force. It is the reactive force acted upon by the body 'B' on 'A'.
  • This reaction force is equal in magnitude of the action force.
  • If the two bodies remain in the same horizontal line, the 'A' exerts a force in the direction towards 'B' and the body 'B' exerts a reaction force in the direction towards 'A'.
  • Hence, the two forces that are exerted by the bodies are equal in magnitude and opposite in direction.
7 0
3 years ago
A roller coaster is travelling 1 m/s at the top of the track. At the bottom of the track, 5 seconds later, it is travelling 36 m
lidiya [134]

Answer:

7m/s²

Explanation:

Given parameters:

Velocity at the top = 1m/s

Velocity at the bottom  = 36m/s

Time  = 5s

Unknown:

Average acceleration = ?

Solution;

Acceleration is the rate of change of velocity with time. It is expressed as;

  A = \frac{v -u}{t}

v is the velocity at the top

u is the velocity at the bottom

t is the time taken

 Now, insert the parameters and solve;

  A = \frac{36 - 1}{5}   = 7m/s²

7 0
3 years ago
An engine has an imput of 100 j and gives out 27 j of useful kenetic energy what is the efficiency of the engine
Lunna [17]

Answer:

Based on what we have learned so far, in what ways have the experiences of Asian-Canadians stayed the same over time? Why do you think these similarities exist? Please give specific examples to support your ideas.

Explanation:

4 0
3 years ago
If an element has 2 valence electrons, how many dots will be in the elements dot diagram?
antiseptic1488 [7]
Well since we're doing the Lewis dot diagram do you know which element on the table that it is? 
6 0
3 years ago
Read 2 more answers
a particle that has a mass of 2.5 kg is moving in the positive X-direction with a constant velocity of 1.6m/s. Suddenly a consta
malfutka [58]
The particle has a constant horizontal velocity, and a vertical force won't affect the horizontal speed, so it should be fairly easy to find the last part, "the time taken for a 10m horizontal displacement," using a kinematic equation.
X = x + vt + (1/2)at²
10 = 0 + (1.6)t + (1/2)(0)t²
10/1.6 = t
t = 6.25s

So now we have to find the vertical displacement over 6.25 seconds on a particle of a 2.5kg mass with a force of 8N.
Start with Newton's second law.
F = ma
8 = (2.5)a
a = 3.2m/s²

Now, use kinematics again.
Y = y + vt + (1/2)at²
Y = 0 + (0)(6.25) + (1/2)(3.2)(6.25)²
Y = <u>62.5m</u>
7 0
3 years ago
Other questions:
  • Identify the ways in which carbon is added to the atmosphere?
    12·1 answer
  • Which of the following masses is the smallest?
    12·2 answers
  • Why might the plant in the dark have grown taller?
    5·1 answer
  • A solar heating system has a 25.0% conversion efficiency; the solar radiation incident on the panels is 1 000 W/m2.
    10·1 answer
  • In most cases, what happens to a liquid when it cools?
    7·2 answers
  • Can you freeze sound waves
    11·1 answer
  • Two harmonic sound waves reach an overseveer simulatenouslt. the obsever hears the sound intensity rise and fall with a time of
    10·1 answer
  • How would an object’s kinetic energy change if it’s mass decreased by a factor of 3 and it moved 6 times faster?
    6·2 answers
  • suppose that we attach velcro® to the non-magnetic ends of the two carts in the video and remove the mass bars, so that both car
    13·1 answer
  • You exit the Vet's Office.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!