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PSYCHO15rus [73]
3 years ago
10

FM radio ________________. a. had a somewhat shorter range than AM radio, but better sound quality. b. was widely adopted in the

1950s, when radio started playing more music. c. had a scratchier sound that was okay for talk radio, but not for music. d. was able to carry signals farther than AM radio. e. was developed by Guglielmo Marconi.
Physics
1 answer:
svetlana [45]3 years ago
6 0

Answer:

(A) FM Radio had a somewhat shorter ranger than AM radio, but better sound quality.

Explanation:

FM Radio was invented in 1933 by Edwin Armstrong who was an American engineer. FM stands for frequency modulation and AM stands for Amplitude Modulation.

FM is used for most broadcasts of music and FM radio stations use a very high-frequency range of radio frequencies.

In FM Radio, the sound is transmitted through changes in frequency. Both FM and AM radio signals experience frequent change in amplitude, they are far less noticeable on FM.

When switching between stations, FM antenna is alternating between different frequencies, and not amplitudes and this produces a much clearer sound and allows for smoother transitions with little to no audible static.

FM signals can be interfered by barriers and this could affect the signal strength. FM Radio signals are more clearer in a mountainous area that has no barrier.

AM radio was able to carry signals farther than AM radio.

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Answer:

Explanation:

mass of liquid m₁ = 161 g

temperature t₁ = 31.8

final temperature t₂ = 28.8

Let m g of ice melted to cool the liquid

heat gained = mass x latent heat of fusion + mass x loss of temp x s heat of water

= m x 80 + m x 1 x ( 31.8 - 28.8 ) ( latent heat of ice = 80 cals/g )

= 83 m

heat lost  = 161 x 1 x ( 31.8 - 28.8 ) ( specific heat of water = 1 cal / g / k )

= 161 x 3

heat lost = heat gained

83 m = 161 x 3

m = 5.82 g

mass of remaining ice = 131 - 5.82

= 125.18 g

4 0
3 years ago
Two or more velocities add by
forsale [732]
Two or more velocities add by vector sum.
In fact, velocity is a vector, with its own intensity, direction and verse. Therefore, we cannot simply add two velocities by algebraic sum, but we need to decompose them on two axes (if we are in a 2D-plane) and calculate the resultant on each axis, and then calculate the total resultant of the two vectors, which will have its intensity, direction and verse.
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3 years ago
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Montano1993 [528]

Answer:\sqrt{65} m/s

Explanation:

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2 years ago
Need help with dot product
slavikrds [6]

\textbf{A}\cdot\textbf{B} = 11.5

Explanation:

The dot product between two vectors \textbf{A} and \textbf{B} is defined as

\textbf{A}\cdot\textbf{B} = AB\cos{\theta}

where A and B are the magnitudes of the vectors \textbf{A} and \textbf{B}, respectively and \theta is the angle between the two. Since A = 3, B = 5 and \theta = 40°, the dot product \textbf{A}\cdot\textbf{B} is

\textbf{A}\cdot\textbf{B} = (3)(5)(0.766) = 11.5

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2 years ago
Energy can be blank from one form to another
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Answer: "converted"

Energy can be converted from one form to another

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The law of conservation of energy states that energy can neither be created nor destroyed but converted from one form to another.

For instance:

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Thus, energy can be converted from one form to another

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