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
iren2701 [21]
3 years ago
7

The weighted average of the masses of the isotopes of an element

Physics
1 answer:
solmaris [256]3 years ago
4 0

Answer:

Atomic mass

Explanation:

The weighted average of the masses of the various isotopes of an element makes the atomic mass. This is why most atomic mass values usually have decimals.

In order to calculate the atomic mass of an element using the weighted average masses, we use the expression below:

                    Atomic mass = ∑m_{i}α_{i}

Where m_{i} is the mass of isotope i

           α_{i} is the abundance of isotope i

The abundance or geonormal abundance is the proportion by which each of the isotope occurs in nature.

You might be interested in
Name two kinds of longitudinal waves and explain how you know they are longitudinal.
dezoksy [38]
A transverse wave and a longitudinal wave.

Transverse:wave particles move at medium speed in perpendicular to the direction that the waves move

Longitudinal:wave particles move at medium speed in parallel to the direction that the wave moves

Hope this helps ^-^
8 0
3 years ago
Assignments
sladkih [1.3K]

Hello there!

I hope you and your family are staying safe and healthy during this unprecendented time.

A) What is the work done?

Answer: We need to use the formula

w=-F_f(d)

w=-(35)(20)

w=-700J

B) What is the work done on the cart by the gravitational force?  

Alright, we know that the gravitional force is perpendicular to the diplacement. Therefore, we gonna use the following formula:

w=Fdcos90

w=0

C) What is the work done on the cart by the shopper?

This is the easier part, since we already know that the work done by the shopper is the same as the work done by the friction force

W shopper + W friction = 0\\W shopper = W-friction \\W shopper = 700J

D) Find the force the shopper exerts, using energy considerations.

F_f+Fcos25=0\\-35+Fcos25=0\\F=38.6N

E) What is the total work done?

You just need to add them:

w=wshopper+wfriction\\w=0

4 0
3 years ago
after a large snowstorm you shovel 2000 kilograms of snow off your side walk in 1 hour. you lift the shovel to an average height
solmaris [256]

Lifting a mass to a height, you give it gravitational potential energy of

       (mass) x (gravity) x (height)  joules.

To give it that much energy, that's how much work you do on it.

If 2,000 kg gets lifted to 1.25 meters off the ground, its potential energy is

         (2,000) x (9.8) x (1.25) = 24,500 joules.

If you do it in 1 hour (3,600 seconds), then the average power is

           (24,500 joules) / (3,600 seconds) = 6.8 watts.

None of these figures depends on whether the load gets lifted all at once,
or one shovel at a time, or one flake at a time.

But this certainly is NOT all the work you do.  When you get a shovelful
of snow 1.25 meters off the ground, you don't drop it and walk away, and
it doesn't just float there. You typically toss it, away from where it was laying
and over onto a pile in a place where you don't care if there's a pile of snow
there. In order to toss it, you give it some kinetic energy, so that it'll continue
to sail over to the pile when it leaves the shovel.  All of that kinetic energy
must also come from work that you do ... nobody else is going to take it
from you and toss it onto the pile.


8 0
3 years ago
A car accelerates from 10.0 m/s to 30.0 m/s at a rate of 3.00 m/s2. how far does the car travel while accelerating?
Snezhnost [94]
Answer is in attachment.

3 0
3 years ago
What part of a standing sound wave does a musician seek in playing a musical note of a specific pitch?
marusya05 [52]
The correct answer to the question above is that the magician is seeking the wavelength of the standing wave. The part of a standing sound wave, which is its wavelength, the magician is seeking when playing a musical note of a specific pitch. 
6 0
3 years ago
Read 2 more answers
Other questions:
  • Sarah moves her box in 3 minutes and does 14 J of work. John moves his box in the same amount of time using 12 J of work. Who is
    7·2 answers
  • What is the angle between the electric field and the axis of the filter?
    15·1 answer
  • Is a single property such as density sufficient to always correctly identify a substance?
    7·1 answer
  • You are presented with several wires made of the same conducting material. The radius and drift speed are given for each wire in
    11·1 answer
  • Can someone help with these/
    8·1 answer
  • What scientist shot alpha particles into gold
    8·2 answers
  • Astronauts need sophisticated spacesuits to protect them from the harsh conditions of space. These spacesuits are very heavy for
    11·1 answer
  • Find the acceleration a body whose velocity increases from 11m/s to 33m/s in 10 seconds
    7·1 answer
  • 9. Mike rides his motorcycle a distance of 10000 meters for 500 seconds, What was is average speed?​
    7·2 answers
  • Differentiate conductors and insulators with the help of suitable examples
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!