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Ad libitum [116K]
3 years ago
12

What is the number of electrons to come be held in the first orbit closest to the nucleus

Physics
1 answer:
Mariulka [41]3 years ago
6 0
In the first shell there can be a maximum of 2 electrons, then 8o in the second one and 8 in the third one.
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Of the numbers 0.0034 m, 45.6 m, and 1234 m, which is the most precise?
julia-pushkina [17]

Answer:

The most precise is 0.0034 m ⇒ 1st answer

Explanation:

<em>Lets revise the meaning of precise</em>

Precision is referred as the closeness of two measurements to one

another.

Highest number with significant digit is the most precise

Ex: <em>Highest significant </em>of optical instrument is the Wavelength of visible (red)

light = 0.00006 cm

Hence the <em><u>most precise</u></em> device for measuring length is the given optical

instrument

The difference between accuracy and precise

<em>Accuracy</em> is how close a value is to its true value

<em>Precision</em> is how repeatable a measurement is

We have three numbers

0.0034 m, 45.6 m, and 1234 m

The least precise is 1234 m

The most precise is 0.0034 m

4 0
3 years ago
Read 2 more answers
Light does not move infinitely fast but has a finite speed. We normally use ""c"" to indicate the speed of light in science. Wri
Ede4ka [16]

Answer:

6.71 × 10^8 mi/hr

Explanation:

Light is usually defined as an electromagnetic wave that is comprised of a definite wavelength. It is of both types, visible and invisible. The light emitted from a source usually travels at a speed of about 3 × 10^8 meter/sec. This speed of light is commonly represented by the letter 'C'.

To write it in the metric system, it has to be converted into miles/hour.

We know that,

1 minute = 60 seconds

60 minutes = 1 hour

1 kilometer = 1000 meter

1 miles = 1.6 kilometer

Now,

= \frac{3 \times\ 10^8 meter \times\ 60 sec \times\ 60 min}{1 sec \times\ 1 min \times\ 1 hr}

= 1.08 × 10^12 m/ hr (meter/hour)

= \frac{1.08 \times\ 10^{12} meter \times\ 1 km \times\ 1 miles}{1 hr \times\ 1000 meter \times\ 1.6 km}

= 6.71 × 10^8 mi/hr (miles/hour)

Thus, the value for speed of light (C) in metric unit is 6.71 × 10^8 mi/hr.

5 0
3 years ago
A wave is sent down a 10 meter long string. The wave has an amplitude of 25 centimeters. It travels the 10 meters in 4 seconds.
cluponka [151]
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7 0
3 years ago
A particular car has a weight of 9500 N. What is the mass of the car? 9500 kg 95000 kg 950 kg 2160 kg
Ivenika [448]

950kg. It is W=mg. therefore, mass= W/g which is W/10

=9500/10

=950

8 0
3 years ago
The table describes the properties of four compounds.
irga5000 [103]

Answer:

compounds C and D

Explanation:

I believe this is correct

8 0
3 years ago
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