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4 years ago

(a) Calculate the total force of the atmosphere acting on the top of a table that measures 1.5 m 2.2 m.

1 answer:

8 0

A)
Atmospheric pressure is 101325 Pa.
Pressure = Force / Area
Area of table = 1.5 x 2.2
= 3.3 m²
Force = 101325 x 3.3
= 334 kN

B)
According to Newton's third law, every action has an equal and opposite reaction. Thus, the upward force is equal to the force acting downward on the table and is being balanced. The force is 334 kN in the upward direction.

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What is the difference between organic and inorganic material?

babymother [125]

Organic materials comes from living things while inorganic materials comes from non living things

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3 years ago

You know that you sound better when you sing in the shower. This has to do with the amplification of frequencies that correspond

Elena L [17]

Answer:

Explanation:

For first overtone

Standing waves will be formed lengthwise and breadth-wise in the enclosures having dimension of .75m x 1.5 m

A ) For the formation of lowest two frequencies formed by standing waves along the breadth , fundamental note and first overtone may be considered.

For fundamental note ,

the condition is

wave length λ = 2L = 2 x 0.75 m

λ = 1.5 m

frequency n = v / λ

= 343 / 1.5

= 229 Hz approx

For first overtone

λ = L = 0.75m

frequency n = v / λ

n = 343 / 0.75

= 457 Hz approx

For the formation of lowest two frequencies formed by standing waves along the length , fundamental note and first overtone may be considered.

For fundamental note ,

the condition is

wave length λ = 2L = 2 x 1.5 m

λ = 3 m

frequency n = v / λ

= 343 / 3

= 114 Hz approx

frequency n = v / λ

n = 343 / 1.5

= 229 Hz approx

3 0

3 years ago

Two 800 cm^3 containers hold identical amounts of a monatomic gas at 20Â°C. Container A is rigid. Container B has a 100 cm^2 pis

Vikki [24]

Answer:

1) Final Temperature of the gas in A will be GREATER than the temperature in B

2) Diagram of both processes on a single PV has been uploaded below

3) The Initial pressures in containers A and B is 3039.87 J/liters

4) the final volume of container B is 923.36 cm³

Explanation:

Given that;

Temperature = 20°C = 293 K

mass of piston = 10 kg

Area = 100cm³

Volume V = 800 cm³ = 0.8 L

ideal gas constant R = 8.3 J/K·mol

Final Temperature of the gas in A will b GREATER than the temperature in B

Diagram of both processes on a single PV has been uploaded below,

Initial pressures in containers A and B

PV = nRT

P = RT/V

we substitute

P = (8.3 × 293) / 0.8

P = 2431.9 / 0.8

P = 3039.87 J/liters

Therefore, The Initial pressures in containers A and B is 3039.87 J/liters

Given that;

power = 25 W

time t = 15s

the final volume of container B = ?

we know that;

work done = power × time

work done = 25 × 15 = 375

Also work done = P( V₂ - V₁ )

so we substitute

375 = 3039.87 ( V₂ - 0.8 )

( V₂ - 0.8 ) = 375 / 3039.87

V₂ - 0.8 = 0.12336

V₂ = 0.12336 + 0.8

V₂ = 0.92336 Litres

V₂ = 923.36 cm³

Therefore, the final volume of container B is 923.36 cm³

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3 years ago

A 500. gram sample of nickle-63 has a half-life of 100. years and has decayed for 500. years. How much of the original 500. gram

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Halve it five times:
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