Answer:
cations; fixed in place
Explanation:
cations; fixed in place
In a metal lattice, the metal ions are cations and they are free to move around. This mobility of ions make the metals conducting.
What are metals ?Metals are electropositive elements with more peculiar features. The metallic particles are strongly held by metal -metal bond. Metals forms highly ordered 3-dimensional crystalline structures.
A metal lattice is a pool of delocalized valence electrons and mobile ions. Metals lose electrons easily and forms cations. These cations and their delocalized valence electrons constitutes the metal lattice.
Both the ions and electrons are free to move within the lattice. This results in high conductivity of metals and the electronic transition also gives colors to the metals.
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A box is being pushed by two stellar science students, one on each side of the box. Delfino is pushing
the box with a force of 10 N to the left. Aleida is pushing the box with a force of 15 N to the right. Who is
the stronger individual and what is the net force and direction on the box.
Explanation:
It is given that,
Delfino is pushing the box with a force of 10 N to the left. Aleida is pushing the box with a force of 15 N to the right.
Aleida is exerting more force. He is the more stronger individual.
Net force is given by :
F = -10+15
F = 5 N
So, the net force is 5 N and it is in right direction.
During the slowing down process, there is a time when the angular speed is 0.5 rev/s. The fan arm is 0.8 m long. What is the speed of a point on the end of the fan arm at this time
Answer:
2.51 m/s
Explanation:
Given that,
Angular speed of a fan, [tex]\omega=0.5\ rev/s = 3.14\ rad/s[/tex]
Length of the fan arm, r = 0.8 m
We need to find the speed of a point on the end of the fan arm at this time. Let v is the speed. It is given in terms of angular speed is given by :
[tex]v=r\omega\\\\v=0.8\times 3.14\\\\v=2.51\ m/s[/tex]
So, the required speed is 2.51 m/s.
The elements of art were created by artists based on things we see in real life. For example, texture on trees or the order of colors in the rainbow.
Question 1 options:
True
False
Answer:
true
Explanation:
just took the best its true
Answer:
True
Explanation:
I took the quiz and got it correct
explain four contributory factors of unequal access to basic resources
Answer:
Answer. The big five factors of poverty (as a social problem) include: ignorance, disease, apathy, dishonesty and dependency. These, in turn, contribute to secondary factors such as lack of markets, poor infrastructure, poorleadership, bad governance, under-employment, lack of skills, lack of capital, and others.
John doe gets on the highway in his 1967 Shelby 427 Cobra starting from the dead stop at the bottom of the on ramp of it can be assumed that John accelerates at a rate of 6.7 m s2 how long does it take for John to reach the speed of 30 m s?
Answer:
It will take john 4.477 seconds
30 points! to who helps me out
Which of these best defines weather? (3 points) a Atmospheric conditions over 30-year period Ob Day-to-day condition of the atmosphere Ос Long-term condition of the atmosphere O d Average atmospheric condition.
Answer:
b Day-to-day condition of the atmosphere
Explanation:
Weather is short term, Climate is long term
Answer:
Average atmospheric condition.
Explanation:
Sean and Tommy are debating the positive and negative impacts of technology on environmental quality. Tommy is listing the negative impacts. Which of the following would help his argument? (2 points)
Grupp av svarsalternativ
Solar panels have become more effective due to technological improvements.
Technology has helped make recycling to be more efficient.
It has created new ways to clean up oil spills.
Factories contribute to air and water pollution.
Answer:
Factories contribute to air and water pollution.
Explanation:
Lab report of experimrnt to find the series resonance of acceptor circuit and parallel resonance of rejector circuit in RLC?
Answer:
afgiknvdeyiknvxwtuinvdruincdyukn
How does temperature effect density and the flow of convection currents?
Answer:
Convection
Explanation:
Convection is heat transfer due to a density differential within a fluid. As water's temperature increases in the presence of a heat source, it will become less dense and rise. As it moves up and away from the heat source, it cools and becomes more dense and sinks.
A solid keeps its shape due to which of the following factors?
Space between particles
Attractive forces between particles
The type of element in the solid
The container it is placed in
Answer:
c
Explanation:
because whatever elements are used like gas uses water evaporation so yeah
Answer:
(A) Space between particles!
Explanation:
Solids can hold their shape because their molecules are tightly packed together!
✞ Bye Have A Nice Day! ✞
g A ring and solid sphere are rolling without slipping so that both have a kinetic energy of 126 J. What is the rotation kinetic energy of the ring
Answer:
63J
Explanation:
The question tells us that they both have a kinetic energy of 126 J. What we are required to get is the rotation kinetic energy of the ring
Total kinetic energy =
1/2mv² + 1/2IW²
For ring,
I = mr²
And v = Rw for pure rolling
The total kinetic energy
= 1/2mr² + 1/2mv²
= 126J
126/2
= 63J
The rotational kinetic energy of the ring is therefore 63J.
Thank you!
Which chemicals are major contributors to ozone layer destruction? Select two answer choices.
Answer:
what are the answers to select? or do you just say them
Explanation:
???
Answer:
c and d
Explanation:
In an experiment, a research collected the following informationabout a solution made from a certain
food. What can we conclude about the food?
• pH = 3.0
• Taste = Sour
A. Acid
B. Base
C. Neutral
D. Salt
Answer:
salt
Explanation:
A trip is taken that passes through the following points in order
Point A 0 m
Point B 15.0 m
Point C -30.0 m
Point D -20.0 m
Point E 10.0 m
Point F 5.0 m
What is the distance from Point C to Point F?
Answer:
35, I got you bro, i got you
The modulus of elasticity for a ceramic material having 4.7 vol% porosity is 317 GPa. (a) Calculate the modulus of elasticity (in GPa) for the nonporous material.
Answer:
The answer is below
Explanation:
a) Given that the modulus of elasticity (E) = 317 GPa, to find the modulus of elasticity (in GPa) for the nonporous material ([tex]E_o[/tex]), we use the formula:
[tex]E_0=\frac{E}{1-1.9P+0.9P^2}\\\\where\ P=4.7\%=0.047,hence:\\\\ E_0=\frac{317}{1-1.9(0.047)+0.9(0.047)^2}\\\\E_0=347.3\ GPa[/tex]
b) If the porosity P = 11.1%, then the modulus of elasticity is:
[tex]E=E_0(1-1.9P+0.9P^2)=347.3(1-1.9(0.111)+0.9(0.111)^2)=278\ GPa[/tex]
Help !! I hate science
Answer:
iron nail rusting
Explanation:
PLEASE HELP THIS IS TIMED
John pushes forward on a car with force of 300 N while Bob pushes backward on the car with a force of 385 N. What is the net force on the car?
A. 85 N backward
B. 685 N backward
C. 685 N forward
D. 85 N foward
Answer:
85 N backwards
Explanation:
u subtract then thats the net force and add direction
The diagram shows the top view of a 65-kg student at point A on an amusement park ride. The ride spins the student in a horizontal circle with a radius of 2.5 m, at a constant speed of 8.6 m/s. The floor is lowered and the student remains against the wall without falling to the floor.
The magnitude of the centripetal force acting on the student at point A is approximately
Question 1 options:
A.) 1923 N
B.) 47 N
C.) 1398 N
D.) 223 N
Answer:
A.) 1923 N
Explanation:
Given parameters:
Mass of the student = 65kg
Radius = 2.5m
Velocity = 8.6m/s
Unknown:
Centripetal force = ?
Solution:
Centripetal force is a force that keeps a body moving along a circular path.
It is mathematically expressed as;
F = [tex]\frac{mv^{2} }{r}[/tex]
m is the mass
v is the velocity
r is the radius
Insert the parameters and solve;
F = [tex]\frac{65 x 8.6^{2} }{2.5}[/tex] = 1923N
Which factors affect the rate of deposition? Check all that apply.
color of the sediment
density of the sediment
size of the sediment
texture of the sediment
velocity of the agent of erosion
Answer:
density of the sediment, size of the sediment, and velocity of the agent of erosion.
Explanation:
Have a nice day!
Answer: b., c., e.
Explanation:
Explain the procedures used and data recorded to identify a crystalline mineral based on its properties.
Answer:
By examining its external shape, color, hardness, etc.
Explanation:
a golf ball with a velocity 40 at an angle 45 degree speed of bthe ball after 2 sec
Answer:
Vertical velocity = 8.28 m/s
Horizontal velocity = 28.3 m/s
__________________________________________________________
We are Given:
Initial velocity of the ball = 40 m/s
Angle of elevation of the ball = 45°
Time interval = 2 seconds
__________________________________________________________
Vertical and Horizontal Components:
Vertical Component:
The vertical component of the ball can also be written as:
40*Sin(45°)
40*(1/√2) [since Sin(45°) = 1/√2]
40/√2 m/s
Horizontal Component:
The horizontal component of the ball can also be written as:
40*Cos(45°)
40*(1/√2) [Since Cos(45°) = 1/√2]
40/√2 m/s
__________________________________________________________
Speed of the Ball after 2 seconds:
Horizontal Velocity:
Since the horizontal velocity is not affected by any force during the flight, the horizontal velocity after 2 seconds will also be 40/√2 m/s
Since √2 = 1.41:
Horizontal velocity = 28.3 m/s
Vertical Velocity:
v = u + at [First equation of motion]
v = 40/√2 + (-10)(2)
[g is negative because it is acting against the direction of motion]
v = 40/√2 - 20
v = [tex]\frac{40-20\sqrt{2} }{\sqrt{2} }[/tex] [taking the LCM]
v = 8.28 m/s [√2 = 1.41]
why cant halleys comet be seen from earth only for about one year of its 76-year orbit
Answer:
Halley's comet will next appear in the night sky in the year 2062. It orbits the sun every 75-76 years, so this is the time between appearances.
How does cold water affect the speed of dissolving?
A. Cold water slows down dissolving
B. Cold water speeds up dissolving
C. Cold water has no effect on dissolving
D. Cold water completely stops dissolving
Answer:
Cold water slows down dissolving
Cold water slows down dissolving. Hence, option (A) is correct.
What is the relationship between the solubility and the temperature?The basic relationship between solubility and temperature is as follows: A solid will dissolve more readily at higher temperatures.
Likewise, a solid element dissolves more slowly at lower temperatures. This is all due to the solvent becoming more and more excited by the heat, making it easier for it to split or break apart entirely.
for while in gases The solubility of gases decreases more rapidly as temperature rises. A gas is more soluble in water when the temperature is lower.
Henry's law, which states that the gas becomes more soluble as the pressure above the liquid solution increases, summarizes another characteristic of gas solutes.
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Pablo and Charles were conducting an investigation where they were measuring the energy of a glass marble as it rolled down a ramp. According to their calculations, the total energy of the marble decreased.
Which statement below is the best explanation for the decrease in total energy?
Answer:
it will be B
Explanation:
Answer:
The energy decreased because heat resulted from the friction between the marble and the ramp.
Explanation:
I think its this answer because i think is has somthing to do with friction
Hello, I have three questions to ask! It's very important, and it would be amazing if you could help me answer it :)!
1. The Dodgers are up at bat during the World Series. Joc Pederson swings his baseball bat and it collides perfectly with the baseball. Identify the action and reaction forces when the bat hits the baseball.
Action force:
Reaction force:
2.When a car hits an insect, the car puts the same amount of force on the insect as the insect puts on the car just in opposite directions.
True
False
3. In the picture below, sphere X swings down and collides with sphere Y. Identify the action and reaction forces.
Action force:
Reaction force:
(The picture is only for number 3).
Answer:
Explanation:
true
When are zeros significant when found in front of (to the left) of the decimal point?
Answer:
If a zero is found between important digits, it is important. Zeros are also used as (not salient) holders to the left of digits if the number is in fact a decimal. Example from www.rpi.edu: , a mass of 42 g has two significant digits. Expressed in kilograms, the mass of 0.042kg should still have two significant digits.
Explanation:
Zeros are also used as (not salient) holders to the left of digits if the number is in fact a decimal. Example from www.rpi.edu: "A mass of 42 g has two significant digits. Expressed in kilograms, the mass of 0.042kg should still have two significant digits."
Hope this comes in handy, have a great day!
Which of these is a base?
HNO3
vinegar
ammonia
HCl
The correct answer is Ammonia
Calculate the ideal mechanical advantage of a pair of scissors where the length of the blade is 5 cm and the length of the handle is 2.5 cm.
Answer:
m = 0.5
Explanation:
Given that,
The length of the blade of scissors = 5 cm
The length of the handle = 2.5 cm
Here, effort arm is 2.5 cm and load arm is 5 cm. The mechanical advantage is the ratio of effort arm to the load arm as follows :
[tex]m=\dfrac{2.5}{5}\\\\m=0.5[/tex]
So, the ideal mechanical advantage of a pair of scissors is 0.5.
When two things are the same temperature:
A They have the same number of molecules incorrect answer
B Their molecules stop moving incorrect answer
C Their molecules move at the same average speed incorrect answer
D Heat transfer between the two things stops
Answer:
its obviously D if all the other says "incorrect answer" XD
Explanation:
Answer:
d :D
Explanation:
