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
Nata [24]
3 years ago
10

¿Juan quiere calentar una barra de aluminio de 100 g, para realizar un trabajo. La temperatura ambiente es de 27°C pero necesita

elevar la temperatura de la barra hasta los 60°C. Si el aluminio tiene un calor especifico de 0,215 cal/g°C que cantidad de calor necesita aplicar ?
Physics
1 answer:
Luda [366]3 years ago
8 0

Answer:

<em>709.5 cal</em>

<em></em>

Explanation:

masa m de la barra de aluminio = 100 g

temperatura ambiente = 27 ° C

<em>Asumiremos que la barra de aluminio está en equilibrio térmico con el ambiente. </em>

Esto significa que la temperatura inicial de la barra es de 27 ° C

temperatura final a la que la barra debe calentarse = 60 ° C

el aumento de temperatura ΔT será

ΔT = 60 ° C - 27 ° C = 33 ° C

capacidad calorífica específica c del aluminio = 0.215 cal/g°C

Calor C requerido = mcΔT

<em>C = 100 x 0.215 x 33 = 709.5 cal</em>

You might be interested in
Define compound and list two examples.
Liono4ka [1.6K]
A compound is a substance that consists of two or more elements, which is chemically combined, meaning that it could only be split by chemical means. 

Examples:-

- NaCl is salt, chemically combined of Sodium and Chloride. 

- H2O is water, chemically combined of Hydrogen and oxygen. 
8 0
3 years ago
Read 2 more answers
In a pig caller can produce a sound intensity level of 107 dB. How many pig callers would be needed to generate an intensity lev
myrzilka [38]

Answer:

20 pig callers

Explanation:

Given that:

A pig caller produced intensity level of  a sound = 107 dB

To find how many pig callers required to generate an intensity level of 120 dB;

we have:

120 dB - 107 dB = 13 dB

Taking the logarithm function;

10 \ log \bigg(\dfrac{I}{I_o} \bigg) = 13 \ dB

where;

I_o = initial intensity

log \bigg(\dfrac{I}{I_o} \bigg) = 1.3

\dfrac{I}{I_o}=  10^{1.3 }

I = 19.95I_o

I ≅ 20 pig callers

6 0
3 years ago
A car starts moving from the position of rest with uniform acceleration of 8m/s^calculate the distance travelled by it during 10
ad-work [718]

We calculate the coordinates at t₁ = 9 min and t₂ = 10 min, since the 10th minute is between t₁ and t₂.

As it leaves from rest, it means that the initial speed is zero


t₁=9 min=540 s

t₂=10 min=600 s

x₁=at₁²/2=8*540²/2=4*291600=1166400 m

x₂=at₂²/2=8*600²/2=4*360000=1440000 m

Δx=x₂-x₁=1440000-1166400=273600 m represents the distance traveled by the car in the 10th minute of travel




8 0
3 years ago
4-08 t 1 - / S P = 1 / P = S 1 S= P Def. of Speed​
nordsb [41]

Answer:

what do I answer? not enough information

8 0
3 years ago
Two forces that act on very small distances (smaller than you can see ) are
BlackZzzverrR [31]
There are three fundamental forces that act at a distance. They are gravitational, electromagnetic and nuclear forces.
7 0
3 years ago
Other questions:
  • Every Saros cycle (19 eclipse years): A. All total solar eclipses occur as total solar eclipses. B. All annular solar eclipses o
    7·1 answer
  • The density of mercury is 13.6 g/ml. what is its density in lbs/L
    11·1 answer
  • Why do different substances have diffrent properties
    11·2 answers
  • The diagram shows a person using a piece of gym equipment to lift weights.
    6·2 answers
  • Before using wind energy to produce electricity, humans used wind energy to produce PLEASE ANSWER QUICKLY
    11·1 answer
  • with the height being 10 m tall how much kinetic energy will a device have to cancel assuming the device weighs 2 kg?
    8·1 answer
  • How do I draw a four-cell battery with the cells connected in series with each other?
    6·1 answer
  • Abby is writing a biography of Isaac Newton. He was a brilliant English scientist who developed the law of universal gravitation
    5·1 answer
  • given a circuit powered at 12V with R1, R2, R3 respectively of 10,20,30 Ohm, determine R4 in such a way that the Wheatstone brid
    6·1 answer
  • I NEED HELP ASAP! Compare the spectrum of the unknown gas collected at the bulb company
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!