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3 years ago

¿Cuál de las siguientes magnitudes es derivada?

Physics

1 answer:

Sedaia [141]3 years ago

8 0

Answer:

A. El volumen

B. La densidad.

Explanation:

A derived quantity is defined as one that has to be calculated by using two or more other measurements.

Volume is a derived quantity because it requires one to use different measurements to determine it. For instance, in the case of a cube, the length, width and height of the cube are all needed to calculate volume.

Density is also a derived quantity because it needs both volume and mass for it to be calculated.

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A piece of aluminum (bulk modulus 7.1 x 1010 N/m2) is placed in a vacuum chamber where the air pressure is 0.781 x 105 Pa. The v

Jet001 [13]

Answer:

${\dfrac{\Delta V}{V}}=11\times 10^{-7}$

Explanation:

Given that

Bulk modulus ,K = 7.1 x 10¹⁰ Pa

The pressure P₁ = 0.781 x 10⁵ Pa

The final pressure P ₂ = 0 Pa

We know that bulk modulus given as

$K=\dfrac{\Delta P}{\dfrac{\Delta V}{V}}$

Now by putting the values

$K=\dfrac{\Delta P}{\dfrac{\Delta V}{V}}$

$7.1\times 10^{10}=\dfrac{0.781\times 10^5}{\dfrac{\Delta V}{V}}$

${\dfrac{\Delta V}{V}}=\dfrac{0.781\times 10^5}{7.1\times 10^{10}}$

${\dfrac{\Delta V}{V}}=11\times 10^{-7}$

Therefore fractional change will be 11 x 10⁻⁷.

3 0

4 years ago

Four 50-g point masses are at the corners of a square with 20-cm sides. What is the moment of inertia of this system about an ax

deff fn [24]

Answer:

moment of inertia I ≈ 4.0 x 10⁻³ kg.m²

Explanation:

given

point masses = 50g = 0.050kg

note: m₁=m₂=m₃=m₄=50g = 0.050kg

distance, r, from masses to eachother = 20cm = 0.20m

the distance, d, of each mass point from the centre of the mass, using pythagoras theorem is given by

= (20√2)/ 2 = 10√2 cm =14.12 x 10⁻² m

moment of inertia is a proportion of the opposition of a body to angular acceleration about a given pivot that is equivalent to the entirety of the products of every component of mass in the body and the square of the component's distance from the center

mathematically,

I = ∑m×d²

remember, a square will have 4 equal points

I = ∑m×d² = 4(m×d²)

I = 4 × 0.050 × (14.12 x 10⁻² m)²

I = 0.20 × 1.96 × 10⁻²

I = 3.92 x 10⁻³ kg.m²

I ≈ 4.0 x 10⁻³ kg.m²

attached is the diagram of the equation

7 0

3 years ago

Magnetic field lines curve out from one pole and return to the same pole. Please select the best answer from the choices provide

Crank

Magnetic field lines always forms closed loop in such a way that it originates from North pole and then terminates back into the South pole

Inside the magnet we will draw the field lines from south pole to north pole

So it is not possible that magnetic field lines originates from north pole and again terminates at the same pole

So this is

FALSE

6 0

4 years ago

Which of Newton's laws best explains why

zheka24 [161]

I am thinking about the law of gravitation

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3 years ago

The force of ________ is the force at which the earth attracts another object towards itself.

Vlada [557]

The answer to this question is Gravity

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4 years ago

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