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ICE Princess25 [194]
3 years ago
14

A force is applied to the rim of a disk that can rotate like a merry-go-round, so as to change its angular velocity. Its initial

and final angular velocities, respectively, for four situations are the following.
(a) -2 rad/s, 5 rad/s;
(b) 2 rad/s, 5 rad/s;
(c) -2 rad/s, -5 rad/s; and
(d) 2 rad/s, -5 rad/s.

Rank the situations according to the work done by the torque due to the force, greatest first.
Physics
1 answer:
frutty [35]3 years ago
8 0

Answer:

The work done by the torque is the same in each case.

Explanation:

Work-Energy Theorem can be used to calculate the work done by the torque in each case.

W = \Delta K\\W = K_2 - K_1 = \frac{1}{2}I\omega_2^2 - \frac{1}{2}I\omega_1^2\\

Let's apply this theorem to each case:

W_a = \frac{1}{2}I(5)^2 - \frac{1}{2}I(-2)^2 = \frac{1}{2}I(21)\\W_b = \frac{1}{2}I(5)^2 - \frac{1}{2}I(2)^2 = \frac{1}{2}I(21)\\W_c = \frac{1}{2}I(-5)^2 - \frac{1}{2}I(-2)^2 = \frac{1}{2}I(21)\\W_d = \frac{1}{2}I(-5)^2 - \frac{1}{2}I(2)^2 = \frac{1}{2}I(21)

As can be seen from the results, in each case the work done by the torque is the same.

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Answer:

The (s) indicates that the state of matter for NaHCO3 is solid.

Explanation:

When a chemical reaction is written, the state of matter for each components of the reactants and products are mentioned in brackets along with their names or formulas.

For example, NaHCO3 has (s) mentioned in the brackets. The s shows that the state of matter for NaHCO3. (l) represents liquid format. (g) represents that the state of matter is gas.

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Unlike acceleration and velocity, speed does not need to specify
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Unlike acceleration and velocity, speed does not need to specify the direction of motion. Speed is a scalar quality.

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As you read this in your chair, how fast are you moving relative to the chair? relative to the sun?
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To answer this question, you need to know the definition of Relative Motion:
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find the potential energy of an aircraft weighing 10000 bs at 5000 ft true altitude and 125 kts true air speed
Cloud [144]

Answer:

U=5*10^7ft.Ib

Explanation:

From the question we are told that

Weight  W= 10000bs

Altitude H=5000ft

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Indica qué es una propiedad específica de la materia. Además explica por qué son útiles las propiedades específicas de la materi
Katyanochek1 [597]

Answer:

Check Explanation

Comprobar explicación

Explanation:

English Translation

Indicate what a specific property of matter is. Also explain why the specific properties of matter are useful compared to the general ones.

Solution

The specific properties of matter are properties that describes the intensive properties of the system. They are properties that do not depend on or change with the extent or size of the system. They are usually obtained by dividing the generalised properties or extensive properties by the extent or size of matter to make them independent of size/extent/Mass.

Examples of specific properties include specific heat capacity, specific volume etc. They usually have units of general units/Mass units.

The specific properties of matter are more important than the general ones because

- They help in general comparisons of the properties of different materials. They are used to rank, classify and compare properties of different materials.

- They are used in reference table/data to easily record easily accessible properties of matter. It helps to record standards that are general and independent of sizes/extents/Mass, thereby keeping the reference table/data/chart precise and concise.

- They provide us with values that are easy to memorize and remember, unlike trying to cram the different properties of different masses/sizes of matter.

In Spanish/En español

Las propiedades específicas de la materia son propiedades que describen las propiedades intensivas del sistema. Son propiedades que no dependen ni cambian con la extensión o el tamaño del sistema. Por lo general, se obtienen dividiendo las propiedades generalizadas o las propiedades extensivas por la extensión o el tamaño de la materia para hacerlas independientes del tamaño / extensión / masa.

Los ejemplos de propiedades específicas incluyen capacidad calorífica específica, volumen específico, etc. Usualmente tienen unidades de unidades generales / unidades de masa.

Las propiedades específicas de la materia son más importantes que las generales porque

- Ayudan en las comparaciones generales de las propiedades de diferentes materiales. Se utilizan para clasificar, clasificar y comparar propiedades de diferentes materiales.

- Se utilizan en la tabla / datos de referencia para registrar fácilmente propiedades de materia fácilmente accesibles. Ayuda a registrar estándares que son generales e independientes de tamaños / extensiones / masa, manteniendo así la tabla / datos / tabla de referencia precisa y concisa.

- Nos proporcionan valores que son fáciles de memorizar y recordar, a diferencia de tratar de agrupar las diferentes propiedades de diferentes masas / tamaños de materia.

Hope this Helps!!!

¡¡¡Espero que esto ayude!!!

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