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
morpeh [17]
3 years ago
15

1. By what are isotopes identified? A.mass numbers B.atomic masses C.atomic mass units D.average atomic masses

Physics
1 answer:
Sladkaya [172]3 years ago
3 0

Answer:

1. A - mass number

2. B - 146

3. B - 20

You might be interested in
Which of the following has both kinetic and potential energy?
zysi [14]
It should be A.
A ball bouncing is moving so if it’s moving that means it has kinetic energy. It also has potential energy because when it hits the floor it kind of stops so it has potential.

-Hope this helps.
5 0
3 years ago
Frequencies of sound waves higher than those we can hear is called?
ludmilkaskok [199]

Answer:

utrasonic

Explanation:

these are sounds beyond our hearing capacity range of 20-20kHz

8 0
3 years ago
Read 2 more answers
A 70.9-kg boy and a 43.2-kg girl, both wearing skates face each other at rest on a skating rink. The boy pushes the girl, sendin
Lelechka [254]

Answer:

Explanation:

Given

mass of boy m_b=70.9\ kg

mass of girl m_g=43.2\ kg

speed of girl after push v_g=4.64\ m/s

Suppose speed of boy after push is v_b

initially momentum of system is zero so final momentum is also zero because momentum is conserved

P_i=P=f

0=m_b\cdot v_b+m_g\cdot v_g

v_b=-\frac{m_g}{m_b}\times v_g

v_b=-\frac{43.2}{70.9}\times 4.64  

v_b=-2.82\ m/s

i.e. velocity of boy is 2.82 m/s towards west                

8 0
2 years ago
Please help!!30 points and will give the brainliest answer for a clear explanation.I need it really fast. Thank you!
kompoz [17]
I would rather be hit by the deflated ball because it wouldn't hurt as bad because it wouldn't have a lot of weight to hurt me in anyway
4 0
3 years ago
does the wavelength of the sound increase, decrease, or stay the smae as the musician changes from the first sound to the second
Naya [18.7K]
Decrease K k kk kk k k k
8 0
2 years ago
Read 2 more answers
Other questions:
  • An incident ray strikes a boundary at a 72.5-degree angle, resulting in an angle of refraction of 39.6 degrees. The index of ref
    8·2 answers
  • At what temperature will silver have a resistivity that is two times the resistivity of iron at room temperature? (Assume room t
    14·1 answer
  • forces are caused by the interactions between tiny charged particles. A. Electric B. Nuclear C. Magnetic D. Gravitational
    6·2 answers
  • 0.0000302 in scientific notation
    5·2 answers
  • Lead has a density of 11.3 g/cm3 and a mass of 282.5 g. What is its volume
    8·1 answer
  • It took 3.5 hours for a train to travel the distance between two cities at a velocity
    5·1 answer
  • What other issues, besides addiction, might go along with overuse of phones?
    9·1 answer
  • Which of the following statements about infrared telescopes is NOT true?
    5·1 answer
  • ASAP PLS ANSWER ALL 4 QUESTIONS! TY! :)
    6·2 answers
  • Will give brainliest!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!