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Pani-rosa [81]
2 years ago
9

8. A round tube weighs 30 kg. If the tube is stood on end, it pushes down on the floor with a pressure of 20 N/m². How many squa

re inches is the end of the tube​
Physics
1 answer:
Rudik [331]2 years ago
4 0

Answer:

22785 square inches

Explanation:

  • As the mass of the tube is 30kg, therefore it is exerting a force of 30g N(30g = 30 × 9.8 = 294)
  • So the force is 294 N.
  • Pressure is 20 N/m², as given.
  • As we know Pressure is equal to the force exerted per unit area (P=F/A).
  • Therefore, A=F/P

        A = 294 ÷ 20 = 14.7 m²

  • As 1 m² = 1550 square inches. Therefore, 14.7 m² = 14.7 × 1550 square inches = 22785 square inches

If you want to know something more about pressure, force, and area, you can refer to this link:

https://brainly.in/question/1440079

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En el presente ensayo se hace una reseña de las críticas que ha recibido la teoría de la ley natural, originalmente propuesta por Germain Grisez y posteriormente desarrollada por otros filósofos del derecho, como John Finnis, Joseph Boyle, William May y Patrick Lee. Los objetivos del autor son demostrar, en primer lugar, que contrariamente a lo que sus críticos afirman, la teoría de la ley natural propuesta por Grisez no excluye el supuesto de que el bien humano básico o las normas morales están basadas en la naturaleza humana o tienen conexión con ella; y en segundo lugar, que Grisez y sus seguidores están en lo correcto al mantener que nuestro conocimiento del bien humano básico y de las normas morales no necesita ni puede ser lógicamente deducido o inferido o derivado de los hechos de la naturaleza humana.

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3 years ago
What does the word deficiency mean<br> a.need<br> b.excess<br> c.problem<br> d.lack
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Answer is D! Ex. Andy has a Vitamin A deficiency.

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3 years ago
Calculate the energy in electron volts of X-rays that have a frequency of 3.00 x 100 Hz.
inn [45]

Answer:

E = 124 eV

Explanation:

Given,

The frequency of the X-rays, ν = 3.0 x 10¹⁰ Hz

The formula for calculating the energy of the electromagnetic waves of a single photon of having frequency 'ν' is given by the relation

                                    E = hν      joules

Where,

                       h - Planck's constant (6.626 x 10⁻³⁴  Js)

Substituting the values in the above equation

                                    E = 6.626 x 10⁻³⁴  Js   x  3.0 x 10¹⁰ Hz

                                       = 1.9878 x 10⁻²³  J

Converting it into eV

                                    E = 1.9878 x 10⁻²³  x 6.242 x 10¹⁸    eV

                                       = 124 eV

Therefore, the energy in electron volts of X-rays is, E = 124 eV

8 0
3 years ago
A tennis player tosses a tennis ball straight up and then catches it after 1.64 s at the same height as the point of release.
ipn [44]

A. The acceleration of the ball while it is in flight?

magnitude is 0 m/s² (magnitude is zero)

B. The velocity of the ball when it reaches its maximum height is 0 m/s (magnitude is zero)

C. The initial velocity of the ball 8.036 m/s upward

D. The maximum height reached by the ball is 3.29 m

<h3>A. How to determine the acceleration in the flight</h3>

Considering that the ball came to rest after 1.64s, it means the entire acceleration of the flight is zero as the ball was not moving in any form again.

<h3>B. How to determine the velocity at maximum height</h3>

At maximum height, the velocity of the ball is zero as it no longer has magnitude to keep going upwards. Hence the ball begins to ball down.

<h3>C. How to determine the initial velocity</h3>
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  • Final velocity (v) = 0 m/s
  • Time of flight (T) = 1.64 s
  • Time to reach maximum height (t) = T / 2 = 1.64 / 2 = 0.82 s
  • Initial velocity (u) =?

v = u - gt (since the ball is going against gravity)

0 = u - (9.8 × 0.82)

0 = u - 8.036

Collect like terms

u = 0 + 8.036

u = 8.036 m/s upward

<h3>D. How to determine the maximum height reached by the ball</h3>
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  • Acceleration due to gravity (g) = 9.8 m/s²
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h = ½gt²

h = ½ × 9.8 × 0.82²

h = 3.29 m

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