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
dalvyx [7]
3 years ago
5

If an element has 20 protons and 20 neutrons in the nucleus of its atoms , what is the mass number of the atom?

Physics
1 answer:
Ilya [14]3 years ago
8 0

Answer:

A=z+n

A=20+20

A=40

Explanation:

Not sure if I'm correct but I was taught that mass number is calculated by A=z+n where A is the mass number, z is the proton number and n is the number of neutrons.

You might be interested in
How many atoms are in 3.5 moles of sulfur
irina [24]
There are 2.1077x10^24 atoms of sulfur in 3.50 mols of sulfur.
5 0
3 years ago
un resorte de 10cm de longitud recibe una magnitud de fuerza que lo estira hasta medir 15cm ¿cual es la magnitud de la tension u
Ber [7]

Answer: 0.5

Explanation:

The modulus of elasticity (called <em>"alargamiento unitario"</em> in spanish) \epsilon of a spring is given by the following formula:

\epsilon=\frac{\Delta L}{L}

Where:

L=10 cm  is the original length of the spring

\Delta L=L_{f}-L  is the elongation of the spring, being L_{f}=15 cm the length of the spring after a force is applied to it.

\epsilon=\frac{L_{f}-L}{L}=\frac{15 cm - 10 cm}{10 cm}

Then:

\epsilon=0.5

8 0
4 years ago
The kinetic energy of a book on a shelf is equal to the work done to lift the book to the shelf. t/f
Svet_ta [14]
The kinetic energy of a book on a shelf is equal to the work done to lift the book to the shelf is false. The kinetic energy on the shelf is zero because it is not in action.
7 0
3 years ago
Read 2 more answers
The diagram below shows a periodic wave. Which two points on the wave are 180 degrees out of phase?
Ksju [112]

Answer:

A and C are 180 deg out of phase (opposite points on a 360 deg wave)

3 0
3 years ago
What are the benefits of scientists using the metric system worldwide
emmainna [20.7K]

Both systems have benefits and disadvantages.

Benefits of the Metric System

<span>Easier for anything involving conversions.Celsius is based on the the freezing and boiling points of water.Is the most popular system of measurement worldwide. This gives interchangeability internationally.Other systems of measurement, like U.S. standard units, are tied directly to metric units so they can be converted back and forth.<span>You can sell to the government since governments (including the U.S. government) require government contractors to use the metric system for most things.</span></span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which sentence states Newton’s third law?
    11·1 answer
  • Imagine we cook an egg by immersing it into water which is boiled by an electric heater. The heater utilizes a current I =10 A a
    10·1 answer
  • A large spool in an electrician's workshop has 70 m of insulation-coated wire coiled around it. When the electrician connects a
    11·1 answer
  • How does Lenz's Law illustrate the concept that "you can't get
    10·1 answer
  • If a ball is dropped from a height​ (H) its velocity will increase until it hits the ground​ (assuming that aerodynamic drag due
    12·1 answer
  • Please round to three sig fig
    8·1 answer
  • Reasons why inductors opposes charges passing through it<br>​
    15·1 answer
  • Give an example of speed making a difference in the amount of kinetic energy. Tell how you know that kinetic energy amount is di
    6·2 answers
  • A father is trying to teach his child to ice skate. As the child stands still, the father pushes him forward with an acceleratio
    9·1 answer
  • If you have 12 atoms of hydrogen before a chemical reaction how many atoms of hydrogen will be president after the chemical reac
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!