1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
creativ13 [48]
3 years ago
14

Which element has 19 electrons surrounding the nuclei of its atoms?

Physics
1 answer:
Tems11 [23]3 years ago
4 0
I think it's potassium, but i'm not sure
You might be interested in
The first law of motion is also called as law _ fill up the blanks ​
Roman55 [17]

Answer:

law of inertial

Explanation:

state that if anobject is in motion it will continue to move until some external force act on it.

5 0
2 years ago
An echocardiogram uses 4.4 MHz ultrasound to measure blood flow in the aorta. The blood is moving away from the probe at 1.4 m/s
Alinara [238K]

Answer:

\Delta f=17959.2\ Hz

Explanation:

Given:

  • original frequency of  the wave, f=4.4\times 10^6\ Hz
  • velocity of the blood stream moving away, v=1.4\ m.s^{-1}

<u>Doppler shift is given as:</u>

\frac{f}{f_o} =\frac{s+v_s}{s-v_o}

where:

s = velocity of ultrasound in blood = 1570\ m.s^{-1}

v_s= velocity of sound  source towards the observer

v_o= velocity of the observer away from the source

\frac{4.4\times 10^6}{f_o} =\frac{1570+0}{1570-1.4}

f_o=4396076.43\ Hz

Therefore the shift in frequency:

\Delta f=f-f_o

\Delta f=3923.56\ Hz

7 0
3 years ago
Ouestion 1
ollegr [7]
North and south will apply
8 0
3 years ago
When the resistance of a circuit is doubled, and no other changes occur, what effect does this have on this current in the circu
liraira [26]

As a result of doubled resistance, current will be halved.

As we know, Ohm's law inversely relates current and resistance to each other. The equation is as follows -

V = I*R, where V is voltage, I is current and R is resistance.

As the question mentions no change in any other parameter, let's assume I₁ and I₂ be initial and final current and R₁ and R₂ initial and final resistance.

So, R₂ will be 2R₁ as it is doubled.

Now, equating the values and finding out the value of final current.

I₁R₁ =  I₂R₂

Keep the value of R₂

I₁R₁ =  I₂2R₁

Cancelling R₁ as it is common on both sides of equation.

So, we get - I₁ =  2I₂

I₂ = I₁/2

Thus, as can be seen above, final current will be half of initial current.

Learn more about Ohm's law and relation between current, voltage and resistance -

brainly.com/question/796939

#SPJ4

3 0
1 year ago
What is the term for the ability to cause change in matter?
Leokris [45]

Answer:

A. Energy

Explanation:

You can change energy from one form to another when you lift your arm or take a step. Energy is used to move matter. In this scenario, the matter would be you.

3 0
3 years ago
Other questions:
  • Please help! Kiki makes a table to compare the particles in a magnesium atom to those in a magnesium ion. She knows that a magne
    5·2 answers
  • Which of the following is/are the best example(s) of elastic collision(s)? Explain why you chose your answer(s).
    5·1 answer
  • Displacement vectors of 3 m and 5 m in the same direction combine to ma
    6·1 answer
  • Which of the following takes place in the combustion chamber of a gas turbine engine?
    10·2 answers
  • How do the properties of an electromagnetic wave change as a result of increasing the period of the wave?
    11·1 answer
  • A 44,495 kg spacecraft is traveling through space with an initial speed of 1,290 m/s relative to Earth. A thruster fires for 27.
    15·1 answer
  • 5. Density equals mass divided by volume. If a
    13·1 answer
  • A copper wire has a circular cross section with a radius of 1.25 mm. If the wire carries a current of 3.70 A, find the drift spe
    9·1 answer
  • The air also contains oxygen nitrogen and carbon dioxide what is the state of each of substance at -190°?
    11·2 answers
  • Why does the moon orbit the Eart
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!