Atoms are known to form charges due to their ability to gain and lose electrons in reactions. As a result, atoms
become ions that are positively or negatively charged depending on the loss or gain of electrons. Which of the
following atoms has a charge of +2 given the number of electrons?
O A. O: 10 electrons
OB. N: 10 electrons
O C. Fe: 24 electrons
OD. Cl: 18 electrons
Answer:
C. Fe: 24 electrons
Explanation:
From the analogy given, the atom with a charge of +2 is Fe having 24 electrons.
To calculate the charges on an atom;
Number of charges = Number of protons - Number of electrons.
O: 10 electrons: 8 protons = 8 - 10 = -2
N: 10 electrons; 7 protons = 7 - 10 = -3
Cl: 18 electrons; 17 protons = 17 - 18 = -1
So;
Fe: 24 electrons and 26 protons = 26 -24 = +2
Therefore, the solution is Fe
What is an astronomical unit?
the average distance between planets in the solar system
the average distance between the Earth and the moon
the approximate diameter of the Sun including its atmosphere
the average distance between the Earth and the Sun
Answer:
D
Explanation:
The ability of the heart, blood vessels and lungs to supply oxygen to the body is?
The ability to allow the heart, blood, vessels, and lungs to supply oxygen to the body is called Cardiovascular fitness.
What is one other thing that needs to be controlled when testing the effect of particle size?
am sorry i thout this was my question not your answer sorry
temperature of the water must be controlled
Which 4 of the following would be considered moderate or vigorous activities?
Question 2 options:
going for a run
vacuuming
surfing
basketball
golfing with a powered Cart.
bike riding
The motion of a car on a position-time graph is represented with a horizontal line. What does this indicate about the car’s motion? A. It’s not moving. B. It’s moving at a constant speed. C. It’s moving at a constant velocity. D. It’s speeding up. i dont know if ive asked this before if i have sorry
The diagram shows a hand reaching for a doorknob.
Which action would decrease the strength of the electric force between the hand and the doorknob?
A) moving the hand closer to the doorknob
B) moving the hand farther away from the doorknob
C) adding negative charges to the hand
D) magnetizing the doorknob
Answer: Moving the hand farther away from the door knob
Explanation:
The magnetic force becomes weaker when there is more distance
The magnetic force becomes weaker when there is more distance.
What is Electric force?The nucleus and electrons are drawn to one another by the electric force. The void created by a positive or negative charge is referred to as an electric field since it generates a field there.
If you had a positive charge just here, it would have an electric field surrounding it and affect the area in which it was located.
The same applies for a negative charge; it too has an electric field surrounding it. Now, opposite charges attract each other while like charges repel one another. A positive charge here and a positive charge here, for example, would resist one another since they are similar charges.
Therefore, The magnetic force becomes weaker when there is more distance.
To learn more about Magnetic force, refer to the link:
https://brainly.com/question/3160109
#SPJ5
If you run the 100 m track at a velocity of 5.0 m/s, what is the time needed?
Which term describes the rate at which charge passes a point in a circuit?
O A. Voltage
O B. Power
O C. Resistance
O D. Current
Answer: D
The word that describes the rate is electric current. It is usually measured in amperes.
Amperes = Coulomb.
Hope it helps!
a sled with no initial velocity accelerates at a rate of 3.2 m/s squared down a hill how long does it take to sled to go 15 m to the bottom
Answer:
After 3.06secondsExplanation:
Given that the following data are
acceleration a= 3,2m/s^2
distance s=15m,
time t=?
Applying the formula for the equation of motion we have
s=ut+1/2at^2
we no initial velocity (u=0)
substituting our given values into the expression we have
15=0*t+1/2(3.2)t^2
15=1/2(3.2)t^2
15=3.2t^2/2
30=3.2t^2
t^2=30/3.2
t^2=9.375
Squaring both sides we have
t=√9.375
t=3.06seconds
It will take the sled 3.06 seconds to get to the bottom
I need help with these 2 questions asap please
Answer:
for number 10
I can't see what needs to be calculated for the first question though
which equation according to ohms law
Answer: Ohm's law states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance, and directly proportional to the resistance of the circuit. The formula for Ohm's law is V=IR.
Which type of thermal energy transfer does a foil wrapping reduce the most? O A. Conduction O B. Translation O C. Radiation O D. Convection
The foil reduces radiation the most in terms of thermal energy transfer. Thermal energy transfer is the movement of heat from one place to another. The four types of thermal energy transfer are radiation, conduction, convection, and advection. The correct answer is option OC.
Foil wrapping reduces radiation as the most type of thermal energy transfer. Thermal energy transfer is the movement of energy from one place to another. There are four types of thermal energy transfer: conduction, convection, radiation, and advection. The foil wrapping reduces radiation the most. When there is a foil wrapped around food, the foil traps the heat inside the food, which reduces the radiation energy transfer. Radiation is the heat transfer that occurs in the form of electromagnetic waves. It requires no matter to move, which is why it can occur in the vacuum of space. Radiation transfer can be absorbed, transmitted, or reflected. Therefore, the correct answer is option OC.For more questions on radiation
https://brainly.com/question/31285748
#SPJ8
A force of 16 N to the west is applied to each object below. Which object will undergo the greatest change in momentum
A force of 16 N to the west is applied to each object below , the object with greater mass and velocity have greater momentum. So, A 20 Kg object that is moving east at 10m/s.
What is force?
Force is an external agent acting on a body, to change it from the state of rest or motion. There are various kinds of forces such as frictional force, magnetic force, nuclear force etc.
In physics, force is the product of mass and acceleration of the body. Greater mass results greater force needed to be applied on the object to make it move or stop.
Momentum is the product of mass and velocity. Thus, as mass or velocity or both increases, momentum of the object increases. Hence the larger object moving faster will gain greater momentum.
Here, option C is the correct answer.
Learn more on momentum,
brainly.com/question/24030570
#SPJ5
Which is not a fundamental force?
A) normal force
B) gravity
C) weak force
D) strong force
Answer:
A
Explanation:
the four fundamental forces are gravity, the weak force, electromagnetism, and the strong force.
what is the definition of sewer?
Answer:
an underground conduit for carrying off drainage water and waste matter
Explanation:
Answer:
an underground conduit for carrying off drainage water and waste matter.
Explanation:
why the formation of sand is a physical change.
what is an example of a non credible online source?
A a chat room for music lovers
B a website run by a university
C the white house's website
D a site for a volunteer organization.
help im being timed 01:37:17
why are those who take bribery or give bribery considered enemies of the nation?
A drug like cocaine causes more dopamine to be produced in the brain.
Please select the best answer from the choices provided
T
F
Answer:
True
Explanation:
A drug like cocaine causes more dopamine to be produced in the brain is True.
What is Dopamine?Dopamine is a type of neurotransmitter which can be a monoamine. This dopamine will be produced in brain and it acts as a chemical messenger which will be used to communicate messages between the nerve cells in the brain and to the brain and the other parts of the body.
When an individual who takes the drugs such as heroin, nicotine, cocaine and methamphetamine can increases or promotes the neurochemical reaction which will produce or increases the amount of dopamine that is a primary factor which can be the addiction that is secreted by neurons in the brain's reward center.
The functions of the reward center is memory, movement, motivation, mood, attention and more.
The diseases caused by dopamine are higher dopamine levels lead to pleasure in the mind of an addict and it makes people forget the pain or stress and gives immense pleasure.
To know more about dopamine,
https://brainly.com/question/28334049
#SPJ6
An Object moving at a velocity of 30 m/s slows to a stop in 7 seconds. What was its acceleration
Answer:
The answer is 4.29 m/s²Explanation:
The acceleration of an object given it's velocity and time taken acting on it can be found by using the formula
[tex]acceleration = \frac{velocity}{time} \\ [/tex]
From the question
velocity = 30 m/s
time = 7 s
We have
[tex]acceleration = \frac{30}{7} \\ = 4.285714...[/tex]
We have the final answer as
4.29 m/s²Hope this helps you
PLEASE HELP :) <3
Describe some ways people can reduce the risks of being harmed by volcanoes and/or earthquakes.
Protection in a volcanic ashfall:
Stay inside, if possible, with windows and doors closed.
Wear long-sleeved shirts and long pants.
Use goggles to protect your eyes.
Keep your car or truck engine switched off.
Protection from earthquake if you're indoors:
Drop down and take cover under a desk or table
Stay inside until the shaking stops and it is safe to exit.
Stay away from bookcases and other furniture that can fall on you.
Stay away from windows and light fixtures.
If you are in bed – hold on and stay there.
Answer:
best way is to remain inside ur home or under any table
The mass of an unidentified rock is 15.5 grams. Students determine the volume of the rock by placing the rock in a cylinder with water. The students calculate the density of the rock. They determine the identity of the rock based on the density ranges in the table.
The students most likely have which type of rock?
Coal
Dolomite
Peridotite
Sandstone
Answer:
this density is in the range of Peridotite type rocks
Explanation:
In this graduated cylinder exercise we can directly read the volume of the rock
V = (35 - 30) cm³
V = 5 cm³
They also indicate the mass of the rock
m = 15.5 gr.
Density is defined as the ratio of mass to volume
ρ = 15.5 / 5
ρ= 3.1 gr /cm³
When checking the attached table this density is in the range of Peridotite type rocks
The type of rock the students mostly like have is Peridotite.
We'll begin by calculating the volume of the rock. This can be obtained as follow:
Volume of water = 30 mL
Volume of water + rock = 35 mL
Volume of rock =?Volume of rock = (Volume of water + rock) – (Volume of water)
Volume of rock = 35 – 30
Volume of rock = 5 mLFinally, we shall determine the type of rock the students have by calculating the density of the rock. This can be obtained as follow:Volume of rock = 5 mL = 5 cm³
Mass of rock = 15.5 g
Density of rock =?Density = mass / volume
Density of rock = 15.5 / 5
Density of rock = 3.1 g/cm³Comparing the density of the rock (i.e 3.1 g/cm³) with those given in table above, we can conclude that the rock is peridotiteLearn more: https://brainly.com/question/2040396
Which three statements could explain the increase in the deer population? A. Rainfall was above average over the past five years B. A hawk species settled into the area five years ago C. Extremely harsh winters occurred during the past five years D. The number of cattle ranchers decreased in the past five years E. The law allowed an extended wolf hunting season for the past five years
Answer:
D. The number of cattle ranchers decreased in the past five years
Explanation:
According to Jennifer M Schieltz and Daniel I Rubenstein (2016), "More than a quarter of earth's land surface is used for grazing domestic livestock." This has negative effects on availability of pasture for herbivorous wildlife such as the deer.
Increase in the number of cattle ranchers decreases the availability of pasture and vice versa.
Hence, the decrease in the number of cattle ranchers over the past five years led to an increase in the deer population due to a decrease in competition for pasture.
Why do storm go to Galveston?
Hurricanes and tropical storms can also spawn tornadoes and microbursts, create storm surges ... If you are unable to evacuate, go to your wind-safe room.
3. What is the mass of a paratrooper who experiences an air resistance of 400 N and an acceleration of 4.5 m/s2
during a parachute jump.
Answer:
88.89kg
Explanation:
The formula for mass is m=F/a. If we plug in the values, we get m=400N/4.5m/s^2. The mass is 88.89kg. We know that the unit is in kg because one newton (N) is 1kg*m/s^2. The m/s^2 is cancelled out by the acceleration, and we are left with kg.
As shown in the figure below, Jenna rushes 30 m toward her truck. She notices she forgot her jacket and
returns back to the house. Her total travel time is 75 s.
30 m
30 m
What is Jenna's average velocity over the 75 s period?
What is Jenna's average speed over the 75 s period?
Answer:
Average Velocity: 0
Average Speed 0.8
Explanation:
Velocity - (30-30)/75 = 0
Speed - (30+30)/75 = 0.8
A 4kg block and a 2kg block can move on horizontal frictionless surface. The blocks are accelerated by a +12-N force that pushes the large block against the smaller one.'
a) Determine the force that the 2kg block exerts on the 4kg block
b) Determine the force that the 4kg block exerts on the 2kg block.
Answer:
a) -4 N
b) +4 N
Explanation:
Draw a free body diagram for each block.
For the large block, there are 2 forces: 12 N pushing to the right, and F pushing to the left.
For the small block, there is 1 force, F pushing to the right.
There are also weight and normal forces in the vertical direction, but we can ignore those.
Sum of forces on the large block in the x direction:
∑F = ma
12 − F = 4a
Sum of forces on the small block in the x direction:
∑F = ma
F = 2a
2F = 4a
Substitute:
12 − F = 2F
12 = 3F
F = 4
The small block pushes on the large block 4 N to the left (-4 N).
The large block pushes on the small block 4 N to the right (+4 N).
3. How many elements are found naturally on the Farth? *
Answer:
Fir wat glasss
Explanation:
A car travels 30 m in 5 seconds. After accelerating for 3 seconds, it travels 20 m in 2 seconds. The cars acceleration is ___m/s
