Difference between combustible and non - combustible

Answer:We can use the formula for the volume of a rectangular solid, V = lwh, where l, w, and h represent the length, width, and height of the solid, respectively. In this case, we are looking for the thickness of the aluminum sheet, so we can use h to represent the thickness.

Given:

l = 52.5 cm

w = 23.2 cm

V = 2.95 cm^3

We need to solve for h:

V = lwh

2.95 cm^3 = (52.5 cm)(23.2 cm)(h)

Divide both sides by (52.5 cm)(23.2 cm):

h = 2.95 cm^3 / (52.5 cm)(23.2 cm)

h = 0.00252 cm or 0.0252 mm (rounded to four decimal places)

Therefore, the thickness of the aluminum sheet is approximately 0.0025 cm or 0.0252 mm.

Explanation:I'm just built different

Answer:

4.907 × 10^-19 J

Explanation:

The energy of the lasers in a Blu-ray player can be calculated by using;

E = hf

Where;

E = Energy of laser (J)

h = Planck's constant (6.626 × 10^-34 J/s)

f = frequency (Hz)

However, the frequency must be known first in order to calculate the energy. The frequency can be calculated using the formula:

f = v/λ

Where:

λ = wavelength (4.05x10−7 m.)

v = speed of light (3 × 10^8m/s)

f = frequency (Hz)

f = 3 × 10^8 ÷ 4.05 x 10^−7

f = 0.7407 × 10^(8 + 7)

f = 0.7407 × 10^15

f = 7.407 × 10^14 Hz

Using E = hf

E = 6.626 × 10^-34 × 7.407 × 10^14

E = 49.07 × 10^(-34 + 14)

E = 49.07 × 10^-20

E = 4.907 × 10^-19 J

Answer: The number of moles that initially occupied a 250ml container remains the same when it occupied 750ml container but they are freer because the 750ml container is bigger and has more space. So the gases now occupied more space and their movement is less curtailed unlike when they were in 250ml container