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3 years ago

How to find the frictional force acting on an object (not the friction coefficient)? ...?

1 answer:

7 0

One can simply find the frictional force acting on an object using this equation:

(Ffrict = μ•Fnorm)

The process of determining the value of the individual forces acting upon an object involve an application of Newton's second law (Fnet=m•a) and an application of the meaning of the net force. If mass (m) and acceleration (a) are known, then the net force (Fnet) can be determined by use of the equation.

Fnet = m • a

If the numerical value for the net force and the direction of the net force is known, then the value of all individual forces can be determined.

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What causes light rays to bend ina new medium

Anon25 [30]

When light rays enter a new medium at an angle, the change in speed causes them to bend and change direction. ... They change the speed causes the ray to bend or change direction. When light slows down even more when it passes from water into glass.

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3 years ago

What is field in physics

Troyanec [42]

Where everything is effected by a force

6 0

3 years ago

A Carnot air conditioner takes energy from the thermal energy of a room at 63°F and transfers it as heat to the outdoors, which

vodomira [7]

Answer:

For the Carnot air conditioner working as a heat pump between 63 and 100°F , It would transfer 3.125 Joules of heat for each Joule of electric energy supplied.

Explanation:

The process described corresponds to a Carnot Heat Pump. A heat pump is a devices that moves heat from a low temperature source to a relative high temperature destination. To accomplish this it requires to supply external work.

For any heat pump, the coefficient of performance is a relationship between the heat that is moving to the work that is required to spend doing it.

For a Carnot Heat pump, its coefficient of performance is defined as:

$COP_{HP}=\frac{T_H}{T_H-T_L}$ Where:

T is the temperature of each heat deposit.

The subscript H refers to the high temperature sink(in this case the outdoors at 100°F)

The subscript L refers to the low temperature source (the room at 63°F)

Then, for this Carnot heat pump:

$COP_{HP}=\frac{T_H}{T_H-T_L}=\frac{100°F}{100°F-63°F}=3.125$

So for each 3.125 Joules of heat to moved is is required to supply 1 Joule of work.

3 0

3 years ago

The basic unit of mass in the International System of Units, or SI, is the a. meter. c. liter. b. ounce. d. gram.

Elodia [21]

The basic unit of mass in the International System of Units. or SI, is D. gram.

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3 years ago

List the characteristicsvof society

GREYUIT [131]

Answer:

1- Likeness

2- Differences

3- Interdependence

4- Cooperation and conflict

5- Society is a network of social relations

6- Sense of belonging

7- The society is abstract

8- The society is dynamic

9- Integral culture

10- Division of labor

Explanation:

Stay frosty

4 0

3 years ago