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
ryzh [129]
3 years ago
8

How many neutrons does element X have if it’s atomic number is 28 and it’s mass number is 81?

Physics
2 answers:
Sedaia [141]3 years ago
8 0

The answer is 53,hope this help

Sauron [17]3 years ago
3 0

Answer:

53

Explanation:

M-A=N

Mass-Atomic #= Neutrons

81-28= 53

You might be interested in
why do you think we have different seasons (fall, summer, winter, spring) in certain areas of the world?
Verizon [17]

Answer:

how the areas are at

Explanation:

The tilt of the Earth's AXIS is the most important reason why seasons occur... The area depends why there's  a certain differnt season on differnt areas , its because one area is closet to the sun which mostky they get summer full time (like a normal year), but  Alaska,it just winter , the reason why Alaska is just cold because its not close to the sun.

7 0
3 years ago
A classic demonstration illustrating eddy currents is performed by dropping a permanent magnet inside a conducting cylinder. The
kvv77 [185]

Answer:

The correct solution is "0.69 N".

Explanation:

The given values are:

Mass of magnet,

m = 70 g

or,

   = 0.07 kg

Width,

= 1.0 cm

Velocity,

= 10 cm/s

Length of the pipe,

= 80 cm

Whenever the velocity is constant, then the net force which is acting on the magnet will be "0".

On the magnet,

The up-ward force will be:

⇒  F=mg

On substituting the values, we get

⇒      =0.07\times 9.8

⇒      =0.69 \ N

4 0
3 years ago
Which term below best matches this definition - a period in European history when many educated people stressed the importance o
german

Answer:

The Enlightenment.

Explanation:

The Enlightenment took place during the eighteen century and it typically involved a period of philosophical, cultural and intellectual movement in which ideas on nature, reason, humanity and God were emphasized on greatly over science and superstition through meetings that were held at coffeeshops, scientific academies, literary salons, masonic lodges, etc. Some of the influential philosophers of the enlightenment were Adam Smith, John Locke, Jean Jacques Rousseau, David Hume, Baruch Spinoza, Montesquieu, Hugo Grotius, Denis Diderot, Gottfried Wilhelm, Cesare Beccaria, Immanuel Kant etc. The enlightenment was also known as the age of reason or the age of enlightenment.

Hence, the enlightenment was a period in European history when many educated people stressed the importance of learning and reasoning; education was considered the key to understanding and solving society's problems.

5 0
2 years ago
cheryl has a mug that she says is made up of matter. heather says that the hot chocolate inside the cup is made up of matter, to
9966 [12]
Well,  basically both Cheryl and Keaton is right.

matter is described as Physical substance that possessed space and mass.

But the thing is, one matter is very small in size and cannot be seen with naked eyes. But everything around us are made by matters

hope this helps


3 0
3 years ago
Which statement is TRUE?
Salsk061 [2.6K]
Statement B is true.
3 0
3 years ago
Read 2 more answers
Other questions:
  • It is believed that during the late Cretaceous period sea levels rose drastically resulting in about a third of the Earth's pres
    9·2 answers
  • How does a plant react to light
    8·1 answer
  • What is the tangential velocity at the edge of a disk of radius 10cm when it spins with a frequency of 10Hz? Give your answer wi
    15·1 answer
  • Use your observations of the circuit construction simulation experiment and your course notes to answer the following questions.
    12·2 answers
  • A (11.4 A) ohm device is connected to a 115 V outlet. If the cost of the electrical energy is $0.16/kWh, determine the cost of r
    15·1 answer
  • The question is on the image below.
    11·1 answer
  • What are the components of a vector with a magnitude of 4.00 and a direction of -112 degrees
    9·1 answer
  • I NEED HELP THIS QUESTION IS SO HARDDD!!
    11·2 answers
  • A car with a mass of 1240kg starts from rest and accelerates to a speed of 19.4m/s in 10.2s. Assume that the force of resistance
    10·1 answer
  • When a bow releases an arrow, the arrow
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!