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sdas [7]
3 years ago
6

Many radios can be operated either by plugging them into the wall or by using batteries. How can a radio use either source of cu

rrent?
Engineering
1 answer:
ch4aika [34]3 years ago
5 0

Answer:

The electric current from the batteries installed in a radio supplies direct current (DC) electricity to the radio components directly as an alternative source to the Alternating Current (AC) converted to DC by the power unit located at the radio end of the cable plugged into the wall outlet.

Explanation:

Part of the power unit in a radio includes an AC to DC converter, which is an electrical circuit that is able to convert the alternating current power input from the wall outlet into a direct current output to the radio with which the radio can work

The alternative source of electric current from the batteries installed in a radio bypasses the AC to DC converter and supplies power directly to the radio so it can also work.

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Air initially at 15 psla and 60 F is compressed to 75 psia and 400 F. The power input to air under steady state condition is 5 h
Triss [41]

Answer:\dot{m}=3.46lbm/min

Explanation:

Initial conditions

P_1=15 psia

T_1=60 F^{\circ}

Final conditions

P_2=75 psia

T_2=400F^{\circ}

Steady flow energy equation

\dot{m}\left [ h_1+\frac{v_1^2}{2}+gz_1\right ]+\dot{Q}=\dot{m}\left [ h_2+[tex]\frac{v_2^2}{2}+gz_2\right ]+\dot{W}

\dot{m}\left [ c_pT_1+\frac{0^2}{2}+g0\right ]+\dot{Q}=\dot{m}\left [ c_pT_2+\frac{0^2}{2}+g0\right ]+\dot{W}

\dot{m}c_p\left [ T_1-T_2\right ]+\left [ -5hp\right ]=\dot{W} -5\times 746\times 3.4121

-4\dot{m}-\dot{m}\times 0.24\times \left [ 400-60\right ]

-81.6\dot{m}-4\dot{m}=-4.949 BTU/sec

\dot{m}=0.057821lbm/sec

\dot{m}=3.46lbm/min

3 0
3 years ago
A cylinder 8 in. in diameter and 3 ft long is concentric with a pipe of 8.25 in internal diameter. Between the cylinder and the
yarga [219]

Answer:

What force is requiere to move the cylinder along

Explanation:

The kinematic viscosity of the ol is 0.006 fr2

5 0
3 years ago
Does a food market have any rooms in particular? Also whats units?
makkiz [27]

Answer:

to be or not to be

Explanation:

Vivi is a drummer for a band. She burns 756756756 calories while drumming for 333 hours. She burns the same number of calories each hour.

8 0
3 years ago
Read 2 more answers
How do you calculate the rate of heat transfer between two bodies with a small area of physical contact.
gavmur [86]

Answer:

So the rate of heat transfer to an object is equal to the thermal conductivity of the material the object is made from, multiplied by the surface area in contact, multiplied by the difference in temperature between the two objects, divided by the thickness of the material.

3 0
3 years ago
What is meant by thermodynamic property? How do you classify the property? Explain with specific examples.
Sergeu [11.5K]

Answer:

The condition of very system can be identified by some physical characteristics of the system known as Thermodynamic Property of the system. For example, pressure, temperature, volume, etc.

Explanation:

Thermodynamic properties are nothing but the physical characteristics of any body by which the physical condition of the body can be described. properties describes the different states of a system. They are macroscopic.

               Properties are of two types ---

Intensive property

Extensive property

Intensive Property : Those properties of a system which does not depend upon mass of the system are known Intensive property.

                               For example, pressure, temperature, density,specific volume, etc

Extensive Property : Properties that depends on the mass oh the system is called Extensive properties.

                               For example, energy, volume, etc.

4 0
3 years ago
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