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aksik [14]
3 years ago
5

Use the drop-down menus to complete the statement.

Physics
2 answers:
Nikitich [7]3 years ago
8 0
Classics.

Resistance is equal to relation between voltage and current.

R = \frac{U}{I}

If we express current:

I = \frac{U}{R}

If current is in fact 0 then one of the quantities either voltage or resistance must be equal to zero. Since resistance cannot be equal 0, because that would violate mathematical law that states that division by zero is undefined the only logical conclusion is voltage.

So the answer should be C voltage and B zero.

Hope this helps!
Leviafan [203]3 years ago
5 0

Answer:

1. Option C: Voltage

2. Option B: Zero

Explanation:

According to Ohm's law, the current in a circuit is directly proportional to the voltage. This means, when there is potential difference across the two ends of a circuit, then only current flows.

I ∝ V

I = \frac{V}{R}

If the given circuit has 0 A current, it means that either potential is zero or resistance is infinite. Practically, we cannot have infinite resistance. This means that the voltage must be zero.

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While standing on the edge of the grand canyon, you see a rattlesnake and scream. You hear the echo of the scream off canyon flo
bezimeni [28]

Answer:

1904 m

Explanation:

\pink{\frak{Given}}\begin{cases} \textsf{ You scream after seeing a rattle snake  .}\\\textsf{Scream is heard after 11.2 s .} \end{cases}

Here we need to find out the depth of the canyon . When you will scream after seeing a snake , the sound produced will travel till the end of the canyon and after hitting the end , it will travel back to you .

  • So if the depth of the canyon is d (say) , then the total distance travelled by the sound wave will be d + d = 2d .

And we know that the speed of the sound is approximately 340m/s in air , so we can use the formula distance = speed * time to calculate the depth of the canyon . So ,

\sf \longrightarrow Distance = (Speed)(Time) \\

\sf \longrightarrow 2d = 340m/s * 11.2 s\\

\sf \longrightarrow d = \dfrac{340m/s * 11.2s}{2} \\

\sf \longrightarrow \boxed{\bf Depth_{canyon}= 1904m }\\

6 0
2 years ago
The opening to a cave is a tall, 30-cm-wide crack. A bat that is preparing to leave the cave emits a 30 kHz ultrasonic chirp. Ho
sweet-ann [11.9K]

Answer:

Width of sound beam is 7.557 m

Explanation:

First we will calculate the wave length from given data:

λ=v/f

Were:

v is the speed

f is the frequency

\lambda=\frac{340}{30*10^3}\\ \lambda=0.01133 m

We considered the opening long and narrow, Using single slit diffraction formula:

mλ=dsinΘ

where:

d is the crack width

m is the order

Θ is angle

Considering m=1, The angle between first minimum from center of beam is:

\theta=sin^{-1}(\frac{m\lambda}{d})\\\theta=sin^{-1}(\frac{1*0.01133}{30*10^{-2}})\\ \theta=2.164^o

The width of beam is:

tanΘ=y/L

tan\theta=\frac{w/2}{L}\\ w=2L\ tan\theta\\w=2*100*tan 2.164\\w=7.557 m

Width=7.557 m

5 0
2 years ago
Which of the following statements is an example of weather?
liq [111]
It is 88 degrees in San Diego
Weather is the condition of the atmosphere at a particular place and time
5 0
3 years ago
3. A driver who is moving at 15 m/s, sees a stop light and puts on the brakes 30 m before an intersection. a) What acceleration
Nesterboy [21]

Please find attached photograph for your answer. Hope it helps! Please do comment

4 0
2 years ago
Early in Earth’s history, differentiation resulted in ___________.
ICE Princess25 [194]

Answer:

ITS D

Explanation:

Trust me

4 0
2 years ago
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