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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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A vehicle of 1 200 kg is moving at a speed of 40 km/h on an incline of 1 in 50. The total constant rolling and wind resistance i
Readme [11.4K]

Answer:11.602 KW

Explanation:

mass of vehicle\left ( m\right )=1200 kg

speed=40Km/h

Resistance=600 N

\eta =80%

Gear ratio\left ( G\right )=4:1

D_{effective}=500mm

Net force to overcome by engine is

F=Resistance + sin component of weight

F=600+mgsin\theta

Where tan\theta =[tex]\frac{1}{50}

\theta =1.1457^{\circ}

F=600+1200\times 9.81\times sin\left ( 1.1457\right )

F=600+235.38=835.38 N

power=F.v=835.38\frac{100}{9}

Engine Power=\frac{835.\frac{100}{9}}{\eta }=11.602 KW

4 0
4 years ago
A state of stress that occurs at a point on the free surface of the of a solid body is = 50 MPa σ x , =10 MPa σ y , and = −15 MP
posledela

Answer:

A) 5 MPa , 55 MPa

B) maximum stress = 55 MPa,  maximum shear stress = 25 MPa

Explanation:

using the given Data

free surface of a solid body

α_{x} = 50 MPa,    α_{y} = 10 MPa , t_{xy} = -15 MPa

attached below is the detailed solution to the question

7 0
3 years ago
Select the correct answer. Ruby wants to create a cube puzzle game. For that she has to create a cube. Which drafting tool do yo
Alexxx [7]

Answer:

D. a triangle and a T-Square

Explanation:

A T-Square is the best drawing tool to create squares. You would need a squares to create cubes.

3 0
3 years ago
A soil specimen was tested to have a moisture content of 32%, a void ratio of 0.95, and a specific gravity of soil solids of 2.7
belka [17]

Answer:

a. 0.9263

b. 0.4872

c. 13.83kN/m^{3}

Explanation:

moisture content (ω) = 0.32

void ratio (e) = 0.95

specific gravity (G_{s}) = 2.75

the degree of satruation (S) = \frac{w . G_{s} }{e} =0.32×2.75/0.95 = 0.9263

b. porosity (n) = \frac{e}{e + 1} = 0.95/(0.95 + 1)= 0.4872

c. dry unit weight (γ_{d}) = \frac{G_{s} . V_{w} }{1 + e}

taking specific unit weight of water (V_{w})= 9.81kN/m^{3}

γ_{d} = 2.75 × 1000/(1 + 0.95) = 13.83kN/m^{3}

5 0
3 years ago
Write Python expressions using s1, s2, and s3 and operators and * that evaluate to: (a) 'ant bat cod'
jenyasd209 [6]

Given that the correct question is

Write Python expressions using s1, s2, and s3 and operators + and * that evaluate to: (a) 'ant bat cod'

Answer:

s1 = 'ant'

s2 ='bat'

s3 ='cod'

#using string concatenation

s4 = s1 + ' ' + s2 +  ' ' +s3

print(s4)

5 0
3 years ago
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