Answer:
Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions; by a combination of ions with other particles; or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the formerly bonded atoms.
Explanation:
Answer:
Ion, any atom or group of atoms that bears one or more positive or negative electrical charges. Positively charged ions are called cations; negatively charged ions, anions. Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions; by combination of ions with other particles; or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the formerly bonded atoms. Examples of these processes include the reaction of a sodium atom with a chlorine atom to form a sodium cation and a chloride anion; the addition of a hydrogen cation to an ammonia molecule to form an ammonium cation; and the dissociation of a water molecule to form a hydrogen cation and a hydroxide anion.
Explanation:hope dis helps u
A pitcher throws a baseball horizontally with a speed of 42 m/s. If the pitcher throws the baseball from a height of 1.25 meters, what is the resultant velocity of the ball right before it hits the ground? Include direction (angle).
Answer:
v = 42.28 m/s
Explanation:
It is given that,
The horizontal speed of a baseball, [tex]u_x=42\ m/s[/tex]
The pitcher throws the baseball from a height of 1.25 meters, h = 1.25 m
Firstly finding t i.e. the stone takes to reach the ground. Using second equation of motion as follows :
[tex]d=ut+\dfrac{1}{2}at^2[/tex]
a = -g and u = 0
[tex]d=-\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{-2d}{g}} \\\\t=\sqrt{\dfrac{-2\times 1.25}{9.8}} \\\\t=0.5\ s[/tex]
Vertical component of the velocity is :
[tex]v_y=gt\\\\v_y=9.8\times 0.5\\\\v_y=4.9\ m/s[/tex]
Resultant velocity,
[tex]v=\sqrt{v_x^2+v_y^2} \\\\v=\sqrt{42^2+4.9^2} \\\\v=42.28\ m/s[/tex]
So, the resultant velocity of the ball before it hits the ground is 42.28 m/s.
Answer:
42.28 m/s
Explanation:
A ball dropped from rest falls freely until it hits the ground with a speed of 18 meters per second. How long did it take for the ball to reach the ground?
Answer:
1.8 secs
Explanation:
u= 0
v= 18m/s^2
t= ?
v= u +at
18= 0 + 10×t
18= 10t
t= 18/10
t= 1.8 secs
Hence it will take the ball 1.8 secs to reach the ground
Mousa builds a bike ramp at 22 degrees that allows him to just barely jump his bike across a 5 m wide stream in the local neighborhood. Bilyan wants to replicate Mousa’s jump by building his own ramp, but at a different angle. At what angle should Bilyan construct his ramp?
A.
44 degrees
B.
11 degrees
C.
78 degrees
D.
68 degrees
If two objects crash into each other, what happens? Are both objects affected? How? If you can, give an example to support your ideas.
If two objects crash into each other, they experience collision and both bodies are affected.
Two bodies are said to collide if they hit or crash into each other.
Hence when two objects crash into each other;
collision occursThere is a release of energy due to this collisionOne of the objects tends to gain momentum or speed while the other object loses momentum.For example, two rolling objects going in opposite directions when they hit each other tens to experience a collision.
Hence we can conclude that if two objects crash into each other, they experience collision and both bodies are affected.
Learn more here: https://brainly.com/question/20424486
An object with a mass of 25 kg is on a free fall from a plane.
a. Calculate the force attracting it to the Earth. Would this force be different in Mars?
Gravitational field strength: 10 N/kg
Answer:
a) F = 250 [N]
Explanation:
Force can be calculated by means of Newton's second law, which tells us that force is the product of mass by acceleration.
a)
F = m*a
where:
F = force [N]
m = mass = 25[kg]
a = gravity acceleration = 10 [m/s²]
F = 25*10 = 250 [N]
Yes, this force would be different on Mars, since the gravitational acceleration of Mars is different from that of Earth.
gm = Martian gravity = 3.72 [m/s²]
Fm = 3.72*25 = 93 [N]
A crate is being pushed with a force of 75 N, if the resulting acceleration of the crate is 3 m/s? what is the
mass of the crate?
Answer:
The answer is 15 kgExplanation:
The mass of the crate can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{75}{3} \\ [/tex]
We have the final answer as
15 kgHope this helps you
Convert the following units into SI units without changing their values.
(a) 20281 g (b) 1.54 km (c) 5 minutes
Answer:
Convert the following units, into SI units without changing their values.
2.5 km
We know that
1 km=1000 m
So, for 2.5 km:
2.5 km=2.5×1000 m
=2500 m
Explanation:
like this you can solve all your question
[tex]hii[/tex]
have a nice day ✌️
Which is NOT true about forces?
A- All these things are true of forces.
B- They result from interactions
C- They have magnitude and direction
D- They come in pairs
E- They are a push or pull
Answer:
A
,
alll true
Explanation:
A scientific
a. theory
b. law
is a rule used to describe a pattern seen in nature, not an explanation of why that pattern might occur.
C. system
d. sequence
Please select the best answer from the choices provided
Ο Α
О В
О с
OD
a scientific LAW is the answer
Explanation:
a scientific law is the rule that nature runs by.
Q5) You drive a car at 40mph a distance of 5 miles to school. How many seconds does it take
you?
Frank Schuman, an American inventor, designed a way to use concentrated sunlight to create steam to drive a turbine to generate electricity in 1910. It did not get accepted in the US, because cheap __________ was being burned to make the steam
Answer:
coal
Explanation:
Frank Schuman's solar power invention to create steam that will drive the turbine to generate electricity was not accepted in the United State back then because coal, a non-renewable energy source, was available for cheap and can easily be burned to generate steam.
Since the coal was readily available for cheap and back then, the deposit was huge to the extent that no one was thinking that it could get exhausted one day or the environmental pollution created through its burning, the invention of Schuman did not get the desired attention.
You are writing a story on a table. What physical properties would you want your table to have?
Answer:The Table should be smooth, hard, and large
Explanation:
There are 3 batteries in a series circuit, each containing 9V, and the total current is 1.5 A. Along the circuit is 4 resistors. The first is 3 ohms, the second is 6 ohms, the third is unknown, and the fourth is 5 ohms. What is the voltage drop across the unknown resistor
Answer:
The voltage drop across the unknown resistor is 6 volts.
Explanation:
Given;
the current flowing in the series circuit, I = 1.5 A
number of batteries in the series circuit, = 3
voltage in each battery = 9V
total voltage in the circuit, 3 x 9V = 27 V
number of resistor in the circuit, = 4
R₁ = 3 ohms
R₂ = 6 ohms
R₃ = ?
R₄ = 5 ohms
Determine the total resistance in the circuit by applying Ohms law;
V = IR
R = V / I
R = 27 / 1.5
R = 18 ohms
Determine the unknown resistance;
R₁ + R₂ + R₃ + R₄ = 18 ohms
3 + 6 + R₃ + 5 = 18
R₃ = 18 - 14
R₃ = 4 ohms
The voltage drop across the unknown resistor (R₃ = 4 ohms);
V₃ = IR₃
V₃ = 1.5 x 4
V₃ = 6 volts.
Therefore, the voltage drop across the unknown resistor is 6 volts.
\in what way are the longitudinal waves formed on the spring coils similar to the sound waves in air?
Answer:
The spring coils and the air participles both move in the same direction as the wave travel
While hiking in the mountains, you see a mountain lion. If you were to react as the Cannon–Bard theory of emotions proposes, which sequence of events would characterize your response? Group of answer choices You would experience physiological changes and a feeling of fear simultaneously. You would feel fear followed by physiological changes. You would experience physiological changes followed by fear. You would experience physiological changes and context appraisal followed by fear
Answer:
You would experience physiological changes and a feeling of fear simultaneously.
Explanation:
Cannon–Bard theory of emotions can as well be regarded as Thalamic theory of emotion, whenever the body experience a stimuli, a message will be sent to the brain by the Thalamus then there will be emotions as a result of this a physiological reaction such as trembling, sweating and others would follows. The theory stressed that physical reaction doesn't depends on emotional reaction.
In the case of hiking in the mountains, and one see a mountain lion. If one were to react as the Cannon–Bard theory of emotions proposes, the sequence of events that would characterize One's response is one would experience physiological changes and a feeling of fear, because a message is send to the brain by the Thalamus, then emotion set in and physiological reaction, which explains Cannon–Bard theory.
What is the average speed if an object travels 90 meters in 3 seconds?
Answer:
The answer is 30 m/sExplanation:
The average speed of an object can be found by using the formula
[tex]v = \frac{d}{t} \\ [/tex]
d is the distance
t is the time
We have
[tex]v = \frac{90}{3} \\ [/tex]
We have the final answer as
30 m/sHope this helps you
Which combination of processes from the water cycle is most likely to cause flooding? low runoff, low evaporation high runoff, high precipitation high runoff, low precipitation low runoff, high condensation
Answer:
High run off, low evaporation
Explanation:
High run off and low evaporation causes flood because if evaporation is low, there won't be changing of liquid water to gas or vapor meaning water will be in abundance and if there is much water in abundance it can lead to flooding. High run off can result in flooding if rainfall water overwhelm the capacity of the drainage system i.e the water is more than what the drainage system can carry, it can result in flooding.
Answer:
high runoff, low evaporation, low precipitation
Explanation:
High run off and low evaporation causes flood because if evaporation is low, there won't be changing of liquid water to gas or vapor meaning water will be in abundance and if there is much water in abundance it can lead to flooding. High run off can result in flooding if rainfall water overwhelm the capacity of the drainage system i.e the water is more than what the drainage system can carry, it can result in flooding.
On the first part of a journey, a motor cyclists travels for 33 hours at an average speed of 60km per hour.On the second part of a journey, the same motor cyclists travels for 600 minutes at an average speed of 50km per hour.How far does the motor cyclists travel in total
Answer:
2480km
Explanation:
9
Fill in the blanks with CONDUCTION, CONVECTION, RADIATION:
is the transfer of energy through direct contact.
is the transfer of energy
through waves
radiation
is the transfer of energy through a medium such as a liquid or a gas.
Answer:radiation is the transfer energy thru heat waves, conduction is direct contact, and convection is through liquid
Explanation:ik this
a car accelerates at a rate of 5.5 m/s2 and reaches a speed of 25 m/s in 4 seconds. What was the original speed of the car?
Speed = (rate of acceleration) x (time)
Accelerating at 5.5 m/s² for 4 seconds, the car gains (5.5 x 4) = 22 m/s of speed.
If it's actually traveling at 25 m/s at the end of that time, then it must have already been moving at (25 - 22) = 3 m/s when the 4 seconds started.
efficient than simple
Compound machines are generally
machines.
Answer:what?????
Explanation:hhisb
The frictional force on moving Toyota Prius is - 259.7 N. Using the calculated net force from problem 4, determine the force of the engine needed to cause the acceleration. Show your work.
Complete Question
The frictional force of moving Toyota Prius was given as - 259.7 N. net force was 795 N and determined the force of the engine needed to cause the acceleration
Answer:
The value is [tex]F_e = 1054.7 \ N[/tex]
Explanation:
From the question we are told that
The frictional force is [tex]F_f = -259.7 \ N[/tex]
The net force is [tex]F_{net} = 795 \ N[/tex]
Generally the net force is mathematically represented as
[tex]F_{net} = F_e - F_f[/tex]
=> [tex]F_e = F_{net} - F_f[/tex]
=> [tex]F_e = 795 - [-259.7][/tex]
=> [tex]F_e = 1054.7 \ N[/tex]
A race car accelerates uniformly from 19.5 m/s to 50.1 m/s in 2.47 seconds. Determine
the acceleration of the car and the distance traveled.
Answer:
12.4m/s²; 80.99m
Explanation:
Acceleration can be defined as the rate of change of the velocity of an object with respect to time.
This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time. Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.
Mathematically, acceleration is given by the equation;
[tex]Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}[/tex]
Given the following data;
Initial velocity = 19.5m/s
Final velocity = 50.1m/s
Time = 2.47 secs
Substituting into the equation;
[tex]a = \frac{50.1 - 19.5}{2.47}[/tex]
[tex]a = \frac{30.6}{2.47}[/tex]
Acceleration, a = 12.4m/s²
Solving for the distance covered;
[tex] S = ut + \frac {1}{2}at^{2}[/tex]
Substituting into the values into the equation;
[tex] S = 19.5(2.47) + \frac {1}{2}(12.4)(2.47)^{2}[/tex]
[tex] S = 48.165 + 6.2 *6.1009[/tex]
[tex] S = 48.165 + 32.8256[/tex]
S = 80.99m
(a) Write down the Bernoulli's Equation and continuity Equation for a pipe flow and define each term in the equation. (b) The closed tank of a fire engine is partly filled with water, the air space above being under pressure. A 6 cm bore connected to the tank discharges on the roof of a building 2.5 m above the level of water in the tank. The friction losses are of 45 cm of water. Determine the air pressure which must be maintained in the tank to deliver 20 litres/sec on the roof.
Answer:
A) [tex]\frac{P}{p} + \frac{1}{2} v^2 + gh = k\\[/tex]
B ) 53.9 kN/m^2
Explanation:
a) Bernoulli's equation and continuity equation for a pipe flow
[tex]\frac{P}{p} + \frac{1}{2} v^2 + gh = k[/tex]
[tex]\frac{P}{p}[/tex] = pressure head
[tex]\frac{1}{2}v^2[/tex] = velocity head
gh = potential head
k = constant
p = density
b) determine the air pressure that must be maintained
Given data :
Discharge rate( R ) = 20 liters/sec ≈ 0.02 m^3
Bore diameter ( d ) = 0.06 m
first we calculate the velocity in the 6 cm bore
v = [tex]\frac{R }{\frac{\pi }{4} *d^2}[/tex] ------- (2)
R = 0.02
d = 0.06
insert the given values into equation 2
V = 7.07 m/s
next we apply the Bernoulli's equation by rewriting it as follows
[tex]\frac{P}{pg} + \frac{1}{2g} v^2 + h = k[/tex]
[tex]\frac{1}{2g}v^2[/tex] ( velocity head ) = [tex]\frac{7.07^2}{2*9.81}[/tex] = 2.55
next we will apply the use of energy conservation law on the surface of water in tank and that on the roof :
Note : H1(frictional head loss ) = 45cm = 0.45 m , g = 9.81
applying the energy conservation law
[tex]\frac{P1}{pg} + \frac{1}{2g} v_{1} ^2 + h1 =[/tex] [tex]\frac{P2}{pg} + \frac{1}{2g} v_{2} ^2 + h2[/tex]
[tex]\frac{P1}{pg}[/tex] = 0 + 2.55 + 2.5 + 0.45
therefore ; P1 = 9.81 * 5.55 = 53.9 kN/m^2
Michael is training to join the Army and runs to the left with a constant
velocity of 2 m/s. If he starts at Om, what is his position after 5 seconds?
Don't forget units and directions if appropriate.
Your answer
Answer:
[tex]10 \: m.[/tex]
Explanation:
[tex]his \: position \:is \: his \: distance \: from \: the \: \\ point \: of \: motion \: and \: is \: given \: by : \\ v = \frac{s}{t} \\ s = vt =2 \times 5 \\ s = 10 \: m.[/tex]
To what extent should the schools be responsible for teaching sex education? To what extent should sex education be left to parents? Who should handle education about STDs?
Answer:
I believe that the doctor or your parent should handle STDs talk because the doctor could tell you your risk of getting STDs or your parent could keep you safe and be prepare.They should be the one to tell you the important of being safe and protected not your PE teacher or anyone else. They will understand your choice but don't talk about your personal life with your teacher .Your parent are the best choice to talk to about STDs.
Explanation:
How are amplitude modulation and frequency modulation techniques similar?
O Both are used by cell phones to produce images.
O Both transform electrical signals into sound waves.
O Both modify the pulse of a carrier wave.
O Both are used by radio stations to transmit sound.
Answer:
D. Both are used by radio stations to transmit sound.
Explanation:
Obtain 5 pennies. Line up 3 pennies touching in a perfect line. Line up 2 more pennies touching each other in perfect line with the other 3 pennies. Leave some space between the groups of pennies. Place your fingers onto the 2 slider pennies. Slide the 2 pennies into the group of 3. This may take practice to slide them correctly. Record what happens to the pennies after collision.
Answer:
Two other pennies will be launched, resting only 3 pennies left.
Explanation:
Take "o" as a pennie.
ooo oo
ooo ← oo
ooooo
oo ← ooo
The process is very similar to what occurs with the pendulum of newton by the law or principle of energy conservation.
In physics, the law or principle of energy conservation states that the total amount of energy in an isolated system remains constant. Such a principle is closely linked to the very definition of energy. An informal way of enunciating this law is to say that energy cannot be created or destroyed: energy can only be transformed from one type to another. The energy from the two pennies will be transferred to the other two pennies from the edge, the energy is then transformed into a kinetic move again.
Plzzzz help due in a few
Answer: 5 = straight, constant
Answer: 6 = unbalanced, velocity
The two processes which produce nuclear changes are _____ and _____.
fizzing
fission
nucleation
fusion
