\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
Explain why a man using a parachute falls through air slowly while a stone falls through air very fast
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]
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:
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.
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.
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 ✌️
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.
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
You do an experiment to find out how much light is needed to make house plants grow taller. The two variables in this experiment are amount of light and the height of the plants. Which variable is the dependent variable and which is the independent variable? Explain your answer.
Answer: To grow strong seedlings, the light should be placed close to the tray, and raised as the plants grow taller. The Independent variable of this experiment is the light that enter the plant. The Dependent variable is the height of the plant.
Explanation:
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
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
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
The current in secondary of coil of a transformer is 1 A and that in primary is 0.5 A. If 200V is available in the secondary what is the voltage in the primary?
Answer:
400 V
Explanation:
The following data were obtained from the question:
Current in secondary coil (Iₛ) = 1 A
Current in primary coil (Iₚ) = 0.5 A
Emf in secondary coil (Eₛ) = 200 V
Emf in primary coil (Eₚ) =.?
The voltage (i.e emf) in the primary coil can be obtained as illustrated below:
Eₛ / Eₚ = Iₚ / Iₛ
200/Eₚ = 0.5/1
Cross multiply
Eₚ × 0.5 = 200 × 1
Eₚ × 0.5 = 200
Divide both side by 0.5
Eₚ = 200/0.5
Eₚ = 400 V
Therefore, the voltage in the primary coil is 400 V
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:
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.
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
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 person ran with a speed of 6 m/s onto the skateboard .What is the speed with which he ride on the skate board
Answer:
Let's define:
M = mass of the person
m = mass of the skateboard.
We can write the momentum as:
P = M*v
Remember the conservation of momentum, as we can not find any force in this situation (a highly idealized situation) the momentum will be conserved.
if P is the momentum before the person rides the skateboard, P' will be the momentum after the person rides the skateboard.
P = M*v
P' = (m + M)*v'
We must have:
P = P'
Now, we can assume that the mass of the skateboard is a lot smaller than the mass of the person, such that:
m << M
then we can assume:
(m +M) ≈ M
then:
P' = (M + m)*v' ≈ M*v'
And this is equal to P.
M*v' = M*v
Then we must have that:
v' = v
and we know that v = 6m/s
Then v' = 6m/s
The velocity after riding the skateboard will be equal to the velocity before riding it (in this model)
In a more scientific way, the velocity after riding the skateboard will be a bit smaller than the velocity before, and it will depend on the mass of the person and the mass of the skateboard.
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
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) 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
efficient than simple
Compound machines are generally
machines.
Answer:what?????
Explanation:hhisb
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:
Plzzzz help due in a few
Answer: 5 = straight, constant
Answer: 6 = unbalanced, velocity
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:
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.
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:
The two processes which produce nuclear changes are _____ and _____.
fizzing
fission
nucleation
fusion