From the Periodic Table...
Francium is a group 1 Element and Barium is a Group 2 Element
This statement is a giveaway as it already tells you that Barium has more valence electrons than Francium since it has 2 electrons in its Outer shell.
This Eliminates Options A and B
Francium has more electrons than Barium
So It should be at a higher energy level.
The correct statement is Francium has fewer valence electrons, but they are in a higher energy level.
The energy level of an element is the region of space around the nucleus where its electrons are found. This corresponds to the period of the element in the periodic table.
Francium is in period 7 in the periodic table (in energy level 7)Barium is in period 6 in the periodic table (in energy level 6)in the electronic configuration of Francium, the valence electron is in 7s¹in the electronic configuration of Barium, the valence electron is in 6s²Thus, we can conclude that, Francium has fewer valence electrons, but they are in a higher energy level.
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Which of the following statements most accurately differentiates potential and kinetic energy?
A. Kinetic energy is a form of mechanical energy, while gravitational potential energy isn't.
B. Gravitational potential energy is a form of mechanical energy, while kinetic energy isn't.
C. Any object that has motion has potential energy, while any object not in motion but with the potential to do work has kinetic energy.
D. Any object that has motion has kinetic energy, while any object not in motion but with the potential to do work has potential energy.
Answer:
D) Both parts are true.
Hey there, hope my answer helps :)
Answer: D) Any object that has motion has kinetic energy, while any object not in motion but with the potential to do work has potential energy.
write the differences between biomass energy and tidal energy
Answer: Tidal power has potential for future electricity generation.
Explanation: biomass energy-is renewable organic material that comes from plants and animals.
a hot metal block is placed into 50g of water in an insulated container the water increases in temperature from 20c to 32c the specific heat capacity of water is 4200j/kgk calculate the quantity of heat energy supplied to the water from the metal
Answer:
25,000 joules
given the formula
Q=Mc(final temperature - initial temperature)
M=50 grams convert to kilogram 0.5
c= 4200 j/kg/k
final temperature=32c
initial temperature=20c
What do you notice about where the independent and dependent variables are located on each hypothesis above?!
Answer:
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The mass number of an isotope refers
to the
Answer:
sum of protons and neutrons in the nucleus of an atom
Explanation:
Mass number=proton number + neutron number
Answer:
Mass number= protons(atomic number) + neutrons
It is the total number of nucleons present in an element
What is the rotation and axis of the lunar eclipse? Pls summarise in detail and asap
Answer:
The Moon revolves around the Earth and rotates on its axis with the same period. • The combined effect of these two motions means that one side of the Moon always faces the Earth.
A sound wave is sent at the bottom of a sea. If the echo is heard after 2 sec- calculate the depth of the sea. The speed of sound in water is 1500 m/s.
Answer:
3000
Explanation:
Basic kinematics (also probably one of the first formulas in your physics textbook):
Velocity=Distance÷Time
Time=2sec
Velocity=1500 m/s
Distance=??
Rearrange the variables to find the last unknown:
Distance=Velocity×Time
=1500×2
=3000 m
A bus travels 6km east and then 8km south. The magnitude of the bus’s resultant displacement is _ km
Hey there! Here's your answer:
10 km
Here's why:
The bus's displacement has two components, a number of km and the direction of the final position from the initial position.
The bus's displacement is the hypotenuse of the triangle, 10 km southeast of the initial position.
But southeast is only a rough estimate of the direction.
The tangent of the angle is 6/8 or .75, so the amount of angle to the east of south is 37 degrees.
South (180 degrees) minus 37 degrees is 143 degrees.
The car’s displacement is more accurately called 10 km in a direction of 143 degrees from the initial point.
Have a good day!
Why is the sun considerad as the main source of energy?
Answer:
The sun is considered as the main source of energy since it is the source of nearly all the earth's energy. Plants produce food using sunlight, and the food we get from plants and animals also has its primary sunlight source.
Hoped it helps you.
Answer:
It is because it supplies most of our energy that we use today, directly or indirectly. It radiates light and heat or solar energy, which makes it possible to exist life on earth.
what is inertia? what are the relations between mass and inertia
Answer:
Inertia is the tendency of an object to continue in uniform motion or remain in its state of rest. Mass is a measure of inertia,so the more huge the mass of an object is the more inertia it has.
Inertia is the tendency of an object to resist a change in its motion. Because of inertia, a resting object will remain at rest, and a moving object will keep moving. Objects with greater mass have greater inertia.
How can radio waves & microwaves communicate over similar distances?
d) All of the
The volume of solid is measured in
a) Litters
b) Grams
c) Cubic centimeters
d) All of the above
a) Liters ... It COULD be. The "Liter" is a perfectly good unit of volume, but it's typically used for liquids and gases, not solids.
b) Grams ... definitely NOT. The "gram" is a unit of mass, not volume.
c) Cubic centimeters ... Yes. This is a unit of volume.
d) All of the above ... No.
The volume of solid is measured in
a) Litters
b) Grams
c) Cubic centimeters
d) All of the above
When is the pressure of the man on the ground more – lying position or standing position? Explain.
The man on the ground in standing position has more pressure. This is because when he stands, only his legs are in contact with the ground. While lying, his body is more in contact with the ground, therefore, he exerts less pressure.
To the point, a manin standing position on the ground had more pressure.
More is the area of contact, less is the pressure efforted.
Thank you...
Can someone please answer this real quick:
Who has the greater velocity, an astronaut who has just completed an orbit of the Earth or you when you have just traveled from home to school? Explain.
Answer:
An astronaut have greater velocity.
At what condition do a coin and a feather fall together? What is the acceleration of the coin and feather at that instant? Justify your answer.
Answer:
If a coin and a feather are dropped from the same height at the same time on the moon’s surface, they fall together. Ans: It is because Gravity of the moon is six times less than that of the earth, therefore coin and a feather are fall together.
A person is pushing a book lying on a table. Identify the different forces that act on
the book and hence mark their directions.
Explanation:
There are two forces acting upon the book. One force - the Earth's gravitational pull - exerts a downward force. The other force - the push of the table on the book (sometimes referred to as a normal force) - pushes upward on the book.
There are mainly 3 forces which acts on a book.
Listed below are the forces and their points:-
• Earth's Gravitational force of attraction- Usually, we may not consider or notice this force, but when a book falls, we understand this, because the book falls due to this gravitational force.
• Force exerted on book while pushing it- While we push a book, we apply Push Force, due to which the book moves on the pushing it on a table.
• Frictional Force- We notice that while pushing a book, it does not continuously move in motion. At a certain distance, this Frictional force increases and therefore, the book comes to a halt.
Location- Opposite of exerted force in all directions
đo cường độ dòng điện bằng dụng cụ gì
Answer:
Explanation:
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what is pulley? How does it help in lifting weight?
Hey there!
A pulley is a "system" that has a rope attached to carry heavy materials off the ground. Once you pull the rope, the heavy item will be carried.
Hope this helps!
Have a great day!
A crowbar having the length of 1.75 m is used to balance a load of 500 N. If the distance between the fulcrum and the load is 0.5 m, calculate: (Friction is neglected] i. effort applied to balance the load
ii. MA
iii. VR
iv. efficiency
Answer:
L=load LA=load arm
E=effort EA=effort arm
suppose you start with an initial velocity of 10 m/s and have an acceleration of -2m/s. what is your final velocity after 9 seconds?
Please find attached photograph for your answer. Please do comment whether it is useful or not
4.You decide to flip a coin to determine whether to do your physics or English homework first. The coin is flipped
straight up.
a. What is the velocity of the coin at the top of its trajectory?
b. If the coin reaches a high point of 0.25 m above where you released it, what was its initial speed? c. If you
catch it at the same height as you released it, how much time did it spend in the a
For the coin that is flipped straight up we have:
a. The velocity at the top of its trajectory (at the maximum height) is 0.
b. When it reaches a high point of 0.25 m above where it was released, the initial velocity is 2.21 m/s.
c. The time that the coin spends on the air is 0.44 s.
a. The velocity of the coin at the top of its trajectory is zero because in the maximum height the ball will stop and then will start to move down.
b. When the coin reaches a high point of 0.25 m above where it was released, the initial velocity can be calculated as follows:
[tex] v_{f}^{2} = v_{0}^{2} - 2gh [/tex]
Where:
[tex] v_{f}[/tex]: is the final velocity = 0 (at the maximum height)
[tex] v_{0}[/tex]: is the initial velocity =?
g: is the acceleration due to gravity = 9.81 m/s² (it is negative because its direction is the opposite to the direction of motion of the coin)
h: is the height = 0.25 m
Hence, the initial velocity of the coin is:
[tex] v_{0} = \sqrt{2gh} = \sqrt{2*9.81 m/s^{2}*0.25 m} = 2.21 m/s [/tex]
c. The time that the coin spends on the air is given by the sum of the rise time and the fall time:
Rise time
[tex] t_{s} = -\frac{v_{f} - v_{0}}{g} = -\frac{0 - 2.21 m/s}{9.81 m/s^{2}} = 0.22 s [/tex]
Since the ball is caught at the same height as it was released, the rise time is the same as the fall time, so the total time is:
[tex] t = 0.22 s*2 = 0.44 s [/tex]
Therefore, the coin spend 0.44 seconds in the air.
You can find another example of initial and final velocity here: https://brainly.com/question/13275688?referrer=searchResults
I hope it helps you!
Which two elements in the list would bond together based on their ionic charges? (30 points) potassium and iodine potassium and iodine potassium and neon potassium and neon calcium and neon calcium and neon calcium and potassium
Answer: Ionic bonds usually occur between metal and nonmetal ions.
Explanation:
An automobile starts at rest and accelerates at 3.5 m/s/s after a traffic light turns green. How far will it have gone when it is traveling at 25 m/s?
Please find attached photograph for your answer. Please do comment whether it helped you or not
What is meant by output work
Answer:
[tex]work \: done \: as \: out \: put \: force \: \\ acts \: through \: the \: out \: put \: \\ distance \\ thank \: you[/tex]
In your own words, provide two examples of scientific data that scientists use to explain how the Big Bang could
have been the birth of the Universe.
Explanation:
One example of how the big bang could have been the birth of the universe is the expansion of it... (Expand on it) (It says in your own words)
Complete the table below. Place an X in the appropriate box to
indicate the type of each measurement unit.
Answer:
Gram per centimeter cubed: Derived Unit
Decimeter: SI Unit
Liter: Derived Unit
Meter Cubed: Derived Unit
Kilogram: SI Unit
Explanation:
Look in Quizlet
It is easy to cut curry by a sharp knife,why?
6. What type of stretching would require you to hold a position for a period of time, like doing a split for two minutes and breathing into the pose? h short-term stretching dynamic stretching static-active stretching ballistic stretching
The answer is C: static-active stretching
Which option is a microscopic property that helps determine whether or not two substances will dissolve with each other? (1 point)
volume
polarity
molecular mass
state of matter
Answer:
The answer is polarity
Answer:
B: Polarity
Explanation:
Does the government think about the welfare of its citizens? Justify (Mention any 2 points)
Answer:
Yes government thinks about the welfare of its citizens because:-
1 they are developing new things day by day.
2 they distribute clothes and different things to their citizens