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
vlabodo [156]
3 years ago
14

7. En la sala de una casa hay una gran ventana de vidrio, por la que se presenta una pérdida significativa de calor; las medidas

de la ventana son 2,5 m x 1,5 m y 2,8 mm de espesor. Hallar la variación de calor en la unidad de tiempo si la temperatura exterior del vidrio es 16°C y la temperatura interior del vidrio es 20°C 8. De un cubo de 1 m de arista de un material X se saca de un horno a 40°C, se quiere saber qué cantidad de calor está radiando al exterior, si el coeficiente de emisividad (e) es 0,8 9. En un laboratorio hay una cantidad de 30 moles de un gas perfecto que sufre expansión isotérmica (temperatura constante). La presión inicial de esta masa de gas es de 20 atmosferas y el volumen es de 12 litros. Al final de la expansión, el volumen es de 50 litros. Por lo tanto, determine: a. La presión final de la masa de gas b. La temperatura que se produce en la transformación 10. Un sistema pasa de un estado a otro, intercambiando energía con el exterior. Calcular la variación de energía interna del sistema en los siguientes casos: a. El sistema libera 300 cal y realiza un trabajo de 700 J b. El sistema libera 300 cal y sobre él se realiza un trabajo de 500 J c. El sistema recibe 400 cal de calor y realiza un trabajo de 250 J
Physics
1 answer:
jonny [76]3 years ago
7 0

Answer:

I DON'T SPEAK TACO BELL!

Explanation:

You might be interested in
A 1000-kg whale swims horizontally to the right at a speed of 6.0 m/s. it suddenly collides directly with a stationary seal of m
Sphinxa [80]

M = mass of the whale = 1000 kg

m = mass of the seal = 200 kg

V = initial velocity of whale before collision with the seal = 6.0 m/s

v = initial velocity of the seal before collision with the whale = 0 m/s

V' = final velocity of two sea creatures after collision = ?

Using conservation of momentum

M V + m v = (M + m) V'

inserting the above values in the equation

(1000 kg) (6.0 m/s) + (200 kg) (0 m/s ) = (1000 kg + 200 kg) V'

6000 kgm/s + 0 kgm/s = (1200 kg) V'

V' = (6000 kgm/s ) /(1200 kg)

V' = 5 m/s

3 0
3 years ago
Read 2 more answers
An ocean wave has a wavelength of 15 meters and is moving at 2.5 m/s. what is the frequency
Tasya [4]

Answer:

frequency is .167/s for this wave

8 0
3 years ago
Read 2 more answers
Are the small sized gears only force, speed and distance, only speed
sesenic [268]
If the gears are of different sizes, they can be used to increase the power of a turning force. The smaller wheel turns more quickly but with less force, while the bigger one turns more slowly with more force. Cars and bicycles use gears to achieve amazing speeds our bodies could never match without help.

3 0
3 years ago
What would be the kinetic energy of an arrow having a potential energy of 50 J after it is shot from a bow?
klasskru [66]

Answer:

The kinetic energy of the arrow is equaled to the potential energy of the stretching of the bow, which in this case is 50 J.

Explanation:

Potential energy converts to kinetic as soon as it begins to move.

3 0
2 years ago
What is the kinetic energy of a ball at rest with a mass of 10 Kg?
xxTIMURxx [149]

Answer:

B 0j

Explanation:

It is at rest, not moving

8 0
3 years ago
Other questions:
  • Water flows at speed v in a pipe of radius R. At what speed does the water flow through a constriction in which the radius of th
    10·1 answer
  • The pattern of weather in an area overtime is called
    10·1 answer
  • Is there a definite end to our atmosphere?
    15·1 answer
  • Select all the substances that can transmit sound waves.
    7·2 answers
  • What is the Mirror equation? What does it look like?
    15·1 answer
  • Boat A and Boat B have the same mass. Boat A's velocity is three times greater than that of Boat B. Compared to
    14·2 answers
  • Any child is pushing a shopping cart at a speed of 1.5 m/s.how long will it take this child to push the cart down the aisle with
    13·1 answer
  • PLEASE I NEED THUS THX SOOOOOO MUCH IT MEANS A LOT! THIS WILL KILL MY GRADE IF ITS BAD Properties of Light Lab Report Instructio
    12·1 answer
  • The majority of which type of dancing was created in African American communities?
    6·2 answers
  • Pleaseeeee HELPPPP THIS IS TIMED ALSO,
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!