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
love history [14]
3 years ago
6

6 A single sheet of aluminium foil is folded twice to produce a stack of four sheets. The total

Physics
1 answer:
Alekssandra [29.7K]3 years ago
3 0
The correct answer is option C. i.e.  4%

<span>The total thickness of the stack of sheets is measured to be (0.80 ± 0.02) mm. 

The maximum true thickness will be </span>(0.80 + 0.02) mm. = 1.00 mm
Ans, the maximum uncertainity will be <span> (0.20 + 0.02) mm = +/-0.04 mm

Thus, the four sheets true thickness will be </span>1.00 mm +/-0.04 mm
Thus, single sheet thickness will be 0.250 mm +/-0.01 mm
Thus, percentage error = (0.01/0.25) * 100 = 4%
You might be interested in
Which statement best describes the adiabatic process? A.the temperature remains constant B.the temperature increases at a consta
devlian [24]
For an adiabatic process Heat is not allowed to cross the boundary of the system.

So:

E.no heat flows into or out of the system

 

7 0
3 years ago
Calculate the energy per photon and the energy per mole of photons for radiation of wavelength (a) 200 nm (ultraviolet), (b) 150
VMariaS [17]

Answer: a. E =9.9*EXP(-19)J

1 mole E= 596178J

b. E= 1.32*EXP(-15)J, 1 mole E=795MegaJ

c. E= 1.98*EXP(-23)J

1 mole E = 11.9J

Explanation: The Energy of a photon E, the wavelength are related by

E= h*c/wavelength

h is the Planck's constant 6.6*EXP(-34)J.s

c is speed of light 3*EXP(8)m/s

h*c=1.98*EXP(-25)

Now let's solve

a. E = h*c/wavelength

= h*c/(200*EXP(-9)m

=9.9*EXP(-19)J

1 mole of a photon contian 6.022*EXP(23)photons by advogadro

Now to get the energy of 1 mole of the photon we have

9.9*EXP(-19)*6.023*EXP(23)

=596178J

b. E=h*c/150*EXP(-12)m

=1.32*EXP(-15)J

1 mole will have

1.32*EXP(-15)*6.022*EXP(23)J

=795*EXP(6)J

c. E= h*c/1*EXP(-2)m

=1.98*EXP(-23)J

1 mole of the photon will have

1.98*EXP(-23)J *6.022*EXP(23)

= 11.9J.

You will notice that the longer the wavelength of the photon the lesser the Energy it as.

NOTE: EXP represent 10^

8 0
4 years ago
Sobre un gas contenido en un cilindro provisto de un pistón se realiza un trabajo de 7000 Joules, mediante un proceso isotérmico
natita [175]

Answer:

En un proceso isotérmico, es decir, la temperatura no cambia, el trabajo puede escribirse como:

W = n*R*T*Ln(P1/P2)

Donde P1 es la presión inicial y P2 la presión final.

Donde las cantidades:

n =  número de moles

R = constante de los gases ideales

T = temperatura no cambian.

Y sabemos que la ecuación de la energía interna es:

U = C*n*R*T

Donde C es otra constante que depende del gas.

De aca, podemos concluir que ninguna de estas variables cambia en nuestro proceso, por lo que la variación de la energía interna es cero.

U2 - U1 = 0

b) Para el calor cedido o absorbido, la formula básica es:

ΔQ = C*(T2 - T1)

Donde ΔQ es el calor absorbido o cedido por el gas, C es una constante que depende del gas, T2 es la temperatura final del gas y T1 es la temperatura inicial del gas.

Como la temperatura no cambia en el proceso, entonces:

T2 = T1

ΔQ = C*(T2 - T1) = C*0 = 0

No hay calor absorbido ni cedido.

c) Podemos concluir que en un proceso isotérmico la energía interna no cambia, y no hay un intercambio de calor.

8 0
3 years ago
๒гคเภɭץ ๓๏๔ร ςคภ รยςк ค ๔เςк ๒єςคยรє คɭɭ Շђєץ ๔๏ เร รՇєคɭ ק๏เภՇร Ŧг๏๓ ץ๏ย คภ๔ ץ๏ย ςคภՇ ๔๏ ภ๏Շђเภﻮ ค๒๏ยՇ เՇ
ElenaW [278]

Answer:

Ik it's sad it's ok tho

Explanation:

:'>

3 0
3 years ago
Discuss why Wolpert says we have a brain.
ycow [4]

Answer:

“We have a brain for one reason and one reason only, and that's to produce adaptable and complex movements,” stated Wolpert, Director of the Computational and Biological Learning Lab at the University of Cambridge. ... The evidence for this is in how well we've learned to mimic our movements using computers and robots.

8 0
3 years ago
Read 2 more answers
Other questions:
  • составьте диалоги по ситуациям 1)вы не видели своего друга всё лето.и вот 1 сентября вы встретились в школе. по русская речь
    15·1 answer
  • Which equation shows the relationship between the Kelvin and Celsius temperature scales?
    7·2 answers
  • A force acts on an object and moves it a certain distance. The product of the force and the distance is the done on the object.
    8·1 answer
  • What kind of weather would an anticyclone likely bring? a. stormy c. dry and clear b. cool and wet d. changeable
    12·2 answers
  • The Hawaiian Islands were formed by seamounts that rose above the ocean surface. What was the original source of the seamounts?
    9·2 answers
  • What does the elastic region of a force vs. depth plot represents? describe
    13·1 answer
  • A bar magnet cut in half will form a total of<br>poles.<br>a)four<br>b)eight<br>c)two​
    11·1 answer
  • Num chuveiro ligado nas posições verão e inverno, com as seguintes características: 220V – 2200W/4400W. Calcule a corrente elétr
    10·1 answer
  • A prism is made from transparent plastic. In this plastic, light travels at 0.8
    12·1 answer
  • A student weighing 5.4 × 102 newtons takes 15 seconds to run up a hill. The top of the hill is 10 meters vertically above her st
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!