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
KATRIN_1 [288]
3 years ago
7

Select the correct answer. An element has atomic number 10 and an atomic mass of 20. How many neutrons are in the atom of this e

lement? A. 10 B. 20 C. 30 D. 0 E. 200
Physics
2 answers:
PolarNik [594]3 years ago
5 0

Answer:

A. 10

Explanation:

The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).

(N) Neutrons = 10

(M) Atomic Mass = 20

(Z) Atomic Number = 10

Z + __ = M

10 + __ = 20

10 + 10 = 20

Artemon [7]3 years ago
3 0

Answer:

I may be wrong but I think its 10.

Explanation:

Number of Protons - Atomic mass.

You might be interested in
6. When sodium and oxygen react to form an ionic compound, the mass of the compound ____ the sum of the masses of the individual
arsen [322]
Because there’s no elemental degradation, the mass of the compound EQUALS the sum of the masses.
3 0
3 years ago
In order for electricity from a battery to power a light bulb, the wire has to provide the electricity a path to do what?
Alex777 [14]

Answer:

The electricity that causes the light bulb to light in this activity is coming from the battery. The wire provides a conductive path for the electricity. But this information is not helpful in terms of understanding how the battery works.

Explanation:

7 0
2 years ago
Read 2 more answers
Essay about why people should not join a gang 300 word​
Salsk061 [2.6K]

Answer:

I don't know if it's fair for me to write an entire essay for you

but if you would like I can list some reasons you can incorporate into an essay.

-------------------------------------------------------------------------------------------------------

-If you are joining a gang you are most likely going to have a greater chance of being targeted, even if it seems like you would be protected.

-Most of the time when someone joins a gang a child is being separated from a parent and will face most aggression.

-This can also cause academic failure in students, from lack of education and probably a pretty bad background.

-For teens when joining a gang they will do things that aren't suited for their age (I would list things but I'm not trying to get myself reported if you know what I mean)

-You will also have a great risk of being imprisoned and facing bad consequences, and these consequences can even be having the death penalty.

-------------------------------------------------------------------------------------

I hope this is good enough, sorry I didn't give you a full essay. I think this should help with that though.

6 0
3 years ago
Q4. Consider the skier on a slope shown in the figure below. Her mass including equipment is 55.0 kg.
Shkiper50 [21]

Answer:

Part a)

When there is no friction then acceleration is

a = 4.14 m/s^2

Part b)

if there is friction force along the inclined then acceleration is

a = 3.33 m/s^2

Explanation:

Part a)

As we know that the skier is on inclined plane

So here if there is no friction then net force along the inclined plane is given as

F = mg sin\theta

now acceleration of the skier is given as

a = \frac{F}{m}

a = g sin\theta

a = 9.81(sin25)

a = 4.14 m/s^2

Part b)

if there is friction force along the inclined then net force along the inclined plane is given as

F = mg sin\theta - F_f

now acceleration of the skier is given as

a = \frac{F}{m}

a = g sin\theta - \frac{F_f}{m}

a = 9.81(sin25) - \frac{45}{55}

a = 3.33 m/s^2

5 0
4 years ago
The vectors of the magnetic field around a long, straight, current-carrying wire are:
pochemuha

Answer:

concentric with the wire

Explanation:

the magnetic field around a long straight, current carrying wire form concentric circles around the wire.

7 0
3 years ago
Other questions:
  • If a cart slows from +22.0 m/s with an acceleration of -2.0, how long dose it req
    6·1 answer
  • A train starting from rest picks up a speed of 20 m/s in 20 s while travelling on a straight path. It continues to move at the s
    6·1 answer
  • A kangaroo can jump over an object 2.46 m high. (a) Calculate its vertical speed (in m/s) when it leaves the ground.
    6·1 answer
  • Name the principle used to find the depth of the sea <br>(GRADE 9)
    13·1 answer
  • The appearance or quality of light reflected from the surface of a mineral is called _____.
    5·2 answers
  • Warm air has greater pressure then cool air. <br> True or False
    12·1 answer
  • The question is in the image
    14·1 answer
  • The electric motor of a model train accelerates the train from rest to 0.685 m/s in 21.5 ms. The total mass of the train is 875
    8·1 answer
  • demonstrate in a brief paragraph how the search to explain planetary orbits exemplifies the scientific method and then use of mo
    5·1 answer
  • Lab Report
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!