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
Solnce55 [7]
3 years ago
8

Help!! Thank You!! Potassium has 19 protons. How many electrons does a neutral potassium atom have?

Physics
2 answers:
fredd [130]3 years ago
8 0
A neutral atom... no matter what the element... has the same number of protons and electrons. In this case, 19 electrons are needed.
Alisiya [41]3 years ago
7 0
19, because the number of protons and electrons are the same!
You might be interested in
What s physics?
Alex777 [14]

The answer is (B. The study of Matter and Energy) but technically you could consider physics all of these as engineering is based on physics and that would be the study of inventions, chemistry and biology were both discovered because of physics, and physics invokes more math than any other subject as it applies math to the entire Universe.

7 0
3 years ago
Read 2 more answers
Rebecca heated 50mL of water from 0 degrees Celsius to 60 degrees Celsius. How much energy did she use to heat the water? Rememb
GuDViN [60]

Answer:

Q = 12540  J

Explanation:

It is given that,

Mass of water, m = 50 mL = 50 g

It is heated from 0 degrees Celsius to 60 degrees Celsius.

We need to find the energy required to heat the water. The formula use to find it as follows :

Q=mc\Delta T

Where c is the specific heat of water, c = 4.18 J/g°C

Put all the values,

Q=50\times 4.18\times (60-0)\\Q=12540\ J

So, 12540 J of energy is used to heat the water.

7 0
3 years ago
Suppose that you can throw a projectile at a large enough v0 so that it can hit a target a distance R downrange. Given that you
NikAS [45]

Answer:

Theta1 = 12° and theta2 = 168°

The solution procedure can be found in the attachment below.

Explanation:

The Range is the horizontal distance traveled by a projectile. This diatance is given mathematically by Vo cos(theta) t. Where t is the total time of flight of the projectile in air. It is the time taken for the projectile to go from starting point to finish point. This solution assumes the projectile finishes uts motion on the same horizontal level as the starting point and as a result the vertical displacement is zero (no change in height).

In the solution as can be found below, the expression to calculate the range for any launch angle theta was first derived and then the required angles calculated from the equation by substituting the values of the the given quantities.

7 0
3 years ago
Why do we tend to attribute others' negative behaviors to dispositions over situational factors?
miskamm [114]

Answer:

Because you have a greater understanding of the mentality and conduct of individuals you care about, you are better able to understand their perspective and are more likely to recognize possible situational factors for their behavior.

4 0
2 years ago
Potential energy is the ability to:
Ymorist [56]

Answer:

potential energy is the ability to do work

8 0
3 years ago
Other questions:
  • SELECT ALL THE CORRECT ANSWERS
    5·1 answer
  • What is the formula for calculating the force and acceleration of an object?{physical science}:)
    8·1 answer
  • What kind of frequency does long shift waves have?
    5·1 answer
  • A box with its contents has a total mass of 40 kg. It is dropped from a very high building. After reaching terminal speed, what
    7·2 answers
  • 5. Which unit of electricity does the work in a circuit?
    13·1 answer
  • Which describes a reflected image in a plane mirror?
    11·1 answer
  • Who wants to be freinds
    14·2 answers
  • A series LR circuit contains an emf source of having no internal resistance, a resistor, a inductor having no appreciable resist
    7·1 answer
  • Calculate the electrostatic force between two protons separated by a distance of 0.90 m
    15·1 answer
  • Which refers to the ratio of output work to input work of a machine expressed as a percent?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!