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
zhuklara [117]
3 years ago
5

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. Given this information, how many

Physics
1 answer:
12345 [234]3 years ago
5 0
It has a 10 electrons. Since it's atomic number is 11 it must have 11 protons. Also, given that it has a +1 charge, it has one less electron than protons since they have equal but opposite charges. The number of protons is the mass number minus the atomic number = 23-11= 12 neutrons.
You might be interested in
What is used to determine the number of a type of atom in a compound based on the chemical name?
____ [38]
Are there options? because there is 2 things im thinking of
4 0
3 years ago
A parallel-plate capacitor has a voltage of 391 v applied across its plates, then the voltage source is removed. what is the vol
andrezito [222]

When the capacitor is connected to the voltage, a charge Q is stored on its plates. Calling C_0 the capacitance of the capacitor in air, the charge Q, the capacitance C_0 and the voltage (V_0=391 V) are related by

C_0 =\frac{Q}{V_0} (1)


when the source is disconnected the charge Q remains on the capacitor.


When the space between the plates is filled with mica, the capacitance of the capacitor increases by a factor 5.4 (the permittivity of the mica compared to that of the air):

C=k C_0 = 5.4 C_0

this is the new capacitance. Since the charge Q on the plates remains the same, by using eq. (1) we can find the new voltage across the capacitor:

V=\frac{Q}{C}=\frac{Q}{5.4 C_0}

And since Q=C_0 V_0, substituting into the previous equation, we find:

V=\frac{C_0 V_0}{5.4 C_0}=\frac{V_0}{5.4}=\frac{391 V}{5.4}=72.4 V



7 0
3 years ago
If you hold your hand over a pot of boiling water, it feels hot. Explain how the boiling water is transferring heat to your hand
disa [49]

by conduction, which is direct touch

5 0
3 years ago
Read 2 more answers
Explain how the loss of a plant, or producer, in an ecosystem can affect a secondary consumer
vova2212 [387]
When plants die they become food for the decomposer for example Lettuce, If all the Lettuce in someones field died the decomposer would get its nutriets and make the soil stronger, so if you plant more Lettuce and it survives the Consumer would get to eat the lettuce. Hope this helped! :)
3 0
3 years ago
Read 2 more answers
Solve: A car travels 2 km North , 10 km East, then 3 km West. pythagorean theorem
Evgen [1.6K]

________b_____ 7 km east

|

| 2km north.

|a

|

°

pythagorean theorem : ✓a² + b² = c²

c² = a² + b² = 4 + 49 = 53

c = ✓53 km

displacement = c = ✓53 km

distance = 10 + 3 + 2 = 15 km

5 0
3 years ago
Other questions:
  • A horizontal uniform bar of mass 3 kg and length 3.0 m is hung horizontally on two vertical strings. String 1 is attached to the
    10·1 answer
  • Chlorophylls absorb most light in which colors of the visible range?
    9·1 answer
  • While watching a small fireworks display from a building 204 feet tall, you observe a rocket that travels from ground to eye lev
    15·1 answer
  • The velocity of sound on a particular day outside is 331 meters/second. What is the frequency of a tone if it has a wavelength o
    6·2 answers
  • If two vectors are perpendicular to each other, how should you add them?
    6·2 answers
  • One type of slingshot can be made from a length of rope and a leather pocket for holding the stone. The stone can be thrown by w
    15·1 answer
  • Which will ensure laboratory safety during the experiment? Check all that apply. using beaker tongs to handle the hot beaker rea
    14·2 answers
  • 5. How much heat is generated when an
    6·1 answer
  • In general, what do you think are the benefits if you already achieve your body goals.​
    7·1 answer
  • A wire that is 1.0 m long with a mass of 90 g is under a tension of 710 N. When a transverse wave travels on the wire, its wavel
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!