What is the scientific notation for 300000 km in 60 Seconds?

How many electrons pass through a 20-ohms resistor in 10 min if there is a potential drop of 30 volts across it?

tangare [24]

The number of electrons passes through 20 ohms resistor in 10 minutes is 5.625e+21.

<h3>What is a resistor?</h3>

In an electronic circuit, a resistor is an electrical component that limits or regulates the flow of electrical current.

Given, the resistance is 20 ohms.

The potential difference is 30 volts

Time is 10 minute

By the formula of current

$\rm I = \dfrac{30}{20} = 1.5 \;C/s$

The charge flowing through the resistor is 1.5 C/s

1 electron charge is 1.6e+19

Now, the number of electrons passing through a 20 ohms resistor is

$\dfrac{1.5}{1.6e+ ^2^1} = 0.9375e+^1^9$

In 10 minutes

$0.9375e+^1^9 \times 60 \times 10 = 5.625e+^2^1$

Thus, the number of electrons passes through 20 ohms resistor in 10 minutes is 5.625e+21.

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5 0

2 years ago

A high school track coach has just purchased a new stopwatch that has an uncertainty of s. runners on the team regularly complet

Alexeev081 [22]

A high school track coach has just purchased a new stopwatch. The stopwatch manual states that the stopwatch has an uncertainty of ±0.05 s . Runners on the track coach’s team regularly clock 100-m sprints of 11.49 s to 15.01 s . At the school’s last track meet, the first-place sprinter came in at 12.04 s and the second-place sprinter came in at 12.07 s .

No, the new stop watch will not be effective in timing the sprint team. The reason for the same is that the uncertainty in the stopwatch is too small to effectively differentiate between the sprint times.

If sprinters were timed with the new stopwatch, first sprinter's time would have been between = 12.04 - 0.05 and 12.04 + 0.05

= 11.99 and 12.09

or between the interval [11.99 , 12.09]

while the second sprinter's time would have been between

= 12.07 - 0.05 =and 12.07 + 0.05

= 12.02 and 12.12

or between the interval [12.0.2 , 12.12]

Hence, there is an overlap between the worst time of the first sprinter, that is, 11.99 and the best time of the second sprinter, that is, 12.02

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6 0

2 years ago

Read the quotation from "Song of Myself." You will hardly know who I am or what I mean, But I shall be good health to you nevert

gtnhenbr [62]

Answer:

The answer is “The self is complex and an integral part of nature”

Explanation:

Just took the test

3 0

3 years ago

Read 2 more answers

During a solar eclipse, the moon is blocked by Earth's shadow.<br> True or false

Deffense [45]

Answer:

I think it is true

Explanation:

the moon goes over the sun and so it creates a solar eclipse

8 0

3 years ago

Drag each label to the appropriate box to indicate whether each statement is associated with rods or cones

kupik [55]

The matchup statement associated with rods or cones are:

involved with night vision
smooth plasma membrane surrounding the intramembranous discs
uses rhodopsin
used in scotopic vision
absorption peak occurs at 500 nm

<h3>Cones:</h3>

highly concentrated in and around the macula
involved with color vision
infolded plasma membrane surrounds each disc
uses photopsin
absorption peaks occur at 420, 531, and 558 nm

<h3>What are the roles of rods and cones in the eye?</h3>

The Rods are known to help in regards to vision at low light levels or scotopic vision.

The cones are known to help or function in regards to vision at the point of higher light levels or what we call photopic vision.

Hence the matchup above are correct.

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8 0

2 years ago