Answer:
Gas – In a gas, particles are in continual straight-line motion. The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely of each other. In most cases, there are essentially no attractive forces between particles.
Explanation:
Answer:
The molecules of a gas move apart when they collide. The average kinetic energy of the particles in a liquid (or solid) is small enough that the forces of attraction between them is sufficient to hold the particles close together. The molecules in a liquid (or solid) do not move apart.
Explanation:
Gas – In a gas, particles are in continual straight-line motion. The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely of each other. In most cases, there are essentially no attractive forces between particles.
help pls ill give points
Answer:
The answer Is erosion!
Hope you do Great!
Explanation:
Answer:
weathering
Explanation:
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
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]
what are these things called
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
If the deflection of a spring is doubled, then how much does the force change?
Answer:
The force is doubled as well.
Explanation:
If you double the spring then the force doubles as well.
If the deflection of the spring is doubled, the force exerted by the spring will also be doubled.
What is the Hooke's Law?The relationship between the deflection of a spring and the force it exerts is described by Hooke's Law, which states that the force exerted by a spring is directly proportional to its deflection. Mathematically, this can be expressed as:
F = kx
where F is the force exerted by the spring, x is the deflection of the spring, and k is the spring constant, which represents the stiffness of the spring.
If we double the deflection of the spring, then x becomes 2x, and the force exerted by the spring becomes:
F = k(2x) = 2kx
Thus, if the deflection of the spring is doubled, the force exerted by the spring will also be doubled (assuming the spring constant remains constant).
Learn more about the deflection here:
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(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
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.
Is the moon accelerating?
Answer:
The Earth's gravity keeps the Moon orbiting us. ... This means gravity makes the Moon accelerate all the time, even though its speed remains constant.
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
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:
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:
What shape must you make with a wire in a circut to have that current generate a magnetic field that is identical to the magnetic field produced by a normal bar magnet?
a
A straight line
b
An oval
c
A square
d
A coil
Answer:
The correct option is;
d. A coil
Explanation:
When a wire, which is an electric conductor is formed into the shape of a coil, and current is allowed to flow through the wire coil, a magnetic field is generated
The magnetic field generated by the electromagnetic coil has direction that consists of flux emanating from one end of the coil and entering the coil from the other end, similar to that of the magnetic field produced by a normal bar magnet.
Answer:
The maximum speed an object can fall in the presence of air resistance
Newton's third law
A coil
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 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
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.
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.
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
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:
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.
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
Plzzzz help due in a few
Answer: 5 = straight, constant
Answer: 6 = unbalanced, velocity
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.
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.
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:
On release 1, a student releases a cart from the top of a ramp, such that the cart travels 190cm before hitting the stopper. The cart increases speed steadily and reaches the bottom of the ramp in 4.00s. What was the magnitude of the cart's acceleration on release 1?
Answer:
0.2375m/s²
Explanation:
Given
S = 190cm = 1.9m
initial velocity u = 0m/s
Time t = 4.00s
Required
acceleration
Using the equation of motion
S = ut + 1/2at²
Substitute
1.9 = 0+1/2a(4)²
1.9 = 8a
a = 1.9/8
a = 0.2375m/s²
The magnitude of the cart's acceleration is 0.2375m/s²
does anybody know?? Please help
How does the sun works
Answer:
The sun works by nuclear fission, because there is so much pressure, it makes it vErY hOt. ( About 10,340 degrees Fahrenheit to be exact, or 5,726 degrees Celsius* )
Explanation:
Hope this helps! <3
An elephant walks due east for a distance of 7.9 km, turns around and then goes due west for 1.9 km, and finally turns around again and heads 3.6 km due east. What is the displacement traveled by the elephant in meters?
Answer:
The displacement traveled by the elephant is 9600 east
Explanation:
Displacement is defined as an object's change in position which is given by the difference between final and initial location of the object
The displacement of the elephant are, taking east as positive direction of motion;
1) 7.9 km east = + 7.9 km
2) 1.9 km west = -1.9 km
3) 3.6 km east = 3.6 km
The net (sum) displacement of the elephant, ∑Δx is given as follows;
∑Δx = 7.9 km - 1.6 km + 3.6 km = 9.6 km
Given that the sum of the displacement is positive and that 9.6 km = 9600 m, we have;
The displacement traveled by the elephant = ∑Δx = 9600 east.