answer.
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
ElenaW [278]
1 year ago
13

Which statements accurately describe Dmitri Mendeleev’s contributions to the development of the periodic table? Check all that a

pply.
Mendeleev wrote the first modern chemistry textbook.
Mendeleev produced the first orderly arrangement of known elements.
Mendeleev ordered the elements by increasing atomic number.
Mendeleev used patterns to predict undiscovered elements.
Mendeleev accounted for variations resulting from isotopes.
Physics
2 answers:
ipn [44]1 year ago
8 0

Answer:

2 & 4

Explanation:

?

Mama L [17]1 year ago
6 0
Mendeleev produced the first orderly arrangement of known elements. Mendeleev used patterns to predict undiscovered elements.
You might be interested in
Sound travels 2146 m through a material in 1.4 seconds. What is the material?
Sonbull [250]
Your basically breaking the sound beerier   <span />
5 0
2 years ago
A projectile is launched horizontally east at a speed of 29.4 M/s towards a wall 88.2 m away. What is the velocity of the projec
Drupady [299]

Time before projectile hits wall

= 88.2 m / 29.4 m/s = 3 seconds

Vertical velocity of projectile after three seconds

= 3*9.8 = 29.4 m/s

Horizontal velocity of projectile after three seconds, assuming no air resistance

= 29.4 m/s  (given)

Conclusion:

velocity of projectile when it hits the wall

= < 29.4, -29.4> m/s

= sqrt(29.4^2+29.4^2) m/s east-bound at 45 degrees below horizontal

= 41.58 m/s east-bound at 45 degrees below horizontal.

6 0
2 years ago
Una columna de mármol, cuya área de sección transversal es de 2.0 m2 sostiene una masa de 25.000 kg. Encontrar: (3 pto )a) El es
bazaltina [42]

Responder:

122,500 Pa; 2.45 × 10 ^ -6; 2.94 × 10 ^ -5m

Explicación:

Dado lo siguiente:

Área de sección transversal (A) = 2m ^ 2

Masa (m) = 25000 kg

Módulo de Young = 50 x 10 ^ 9 N / m2

(1) estrés en la columna:

Estrés = Fuerza / Área

F = masa * aceleración debido a la gravedad

F = 25000kg * 9.8m / s ^ 2 = 245,000J

Estrés = 245,000J / 2m ^ 2

Estrés = 122,500 Pa

2) Deformación de la unidad (deformación):

Usando la relación:

Módulo de Young = Estrés / tensión

50 × 10 ^ 9 = 122,500 / CEPA

Cepa = 122500 / (50 × 10^9)

Cepa = 0.00000245

C) Si la altura es de 12 m, ¿cuánto se acorta la columna?

Cepa = extensión / longitud

0.00000245 = extensión / 12

0,00000245 * 12

0,0000294 m

7 0
2 years ago
In a laboratory, Nakisha mixes a sodium hydroxide solution with an indicator called phenolphthalein. When combined, they create
Gnesinka [82]

by making qualitative observations about the sodium hydroxide and phenolphthalein in solution

by comparing the given solution to other familiar solutions containing phenolphthalein

by designing an experiment to test phenolphthalein with other solutions

8 0
1 year ago
Read 2 more answers
A solution is a special mixture where you cannot see the individual substances that are mixed. You look at two bowls of ice crea
maxonik [38]
The two bols of ice creams are composed of vanilla the same subtances
7 0
1 year ago
Other questions:
  • A future use of space stations may be to provide hospitals for severely burned persons. it is very painful for a badly burned pe
    13·1 answer
  • Calculate the change in the kinetic energy (KE) of the bottle when the mass is increased. Use the formula KE = mv2, where m is t
    9·3 answers
  • A wire with a length of 150 m and a radius of 0.15 mm carries a current with a uniform current density of 2.8 x 10^7A/m^2. The c
    10·1 answer
  • Al llegar a detenerse, un automóvil deja marcas de derrape de 92m de largo sobre una autopista. Si se supone una desaceleración
    15·1 answer
  • The human ear canal is, on average, 2.5cm long and aids in hearing by acting like a resonant cavity that is closed on one end an
    15·1 answer
  • Suppose the door of a room makes an airtight but frictionless fit in its frame. Do you think you could open the door if the air
    9·1 answer
  • Michael Phelps needs to swim at an average speed of 2.00 m/s in order to set a new world record in the 200 m freestyle. If he sw
    8·1 answer
  • A beam of electrons is accelerated from rest through a potential difference of 0.200 kV and then passes through a thin slit. Whe
    13·1 answer
  • An extremely long thin wire carries a uniform linear charge density of 358 nC/m. Find the potential difference between points 5.
    6·1 answer
  • Two thermometers are calibrated, one in degrees Celsius and the other in degrees Fahrenheit.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!