The wavelength of a 2.4 ghz sine wave is 0.5 inches.
What is wavelength?In physical science, the frequency is the spatial time of an occasional wave the distance over which the wave's shape rehashes. Albeit X-beams have numerous advantageous applications, utilizing them requires alert since openness can cause visual deficiency, malignant growth and different wounds. Frequency and recurrence are conversely related so that more drawn out waves have lower frequencies, and more limited waves have higher frequencies. Frequency addresses the distance between two successive recurrence wave tops and is normally used to portray the electromagnetic range.
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a model house that runs completely on renewable energy uses 222 windmills and 333 solar panels. each windmill generates mmm kilowatt-hours (kwh) of energy per year, and each solar panel generates sss kwh per year. which expressions can we use to describe how many kwh of energy the model house will output in 101010 years? choose 2 answers: choose 2 answers:
The total energy output in 1010 years is therefore equal to (22M + 33S) 1010 kWh.
Energy output in 1010 years will be equal to (22M + 33S) 1010 kWh.
22 windmills make up the model home. M kWh of energy are produced by one wind turbine year. 22 windmills generate 22 M kWh of energy each year. 33 solar panels make up the model home. S kWh of energy is produced by one solar panel annually. Energy produced by 33 solar panels annually equals 33 S kWh.
Now, the total amount of energy produced by 22 windmills and 33 solar panels in a year is equal to (22 M + 33 S) kWh.
Why is clean energy so essential?One of the most crucial steps you can take to lessen your influence on the environment is to use renewable energy. More than all of our driving and flying put together, electricity production is our main source of greenhouse gases. Clean energy also lessens damaging smog, toxic buildup in our air and water, and the effects of coal mining and gas extraction. It will take time to replace our fossil fuel infrastructure, and clean energy demand from consumers and companies, as well as strong, continuous support from state and federal mandates to create renewable energy generation.
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paraffin wax–cs0.33wo3 composite windows with excellent near- infrared shielding and thermal energy storage abilities
paraffin wax–cs0.33wo3 [cesium tungsten bronze]
Its coating effectively reduce the solar heat gain and air conditioning energy utilization of building because of high selective NIR
( NIR - near infrared ) absorbing ability.
the solar energy that absorbed by the window glass will overheat the glass due to photothermal conversion of paraffin wax.
to reduce this problem.
A new energy efficient composite window is designed by NIR shielding.
In the composite window the hexagonal phase cs0.33wo3 is prepared by a reaction of solid state then coated on commercial float glass.
cs0.33wo3 in the window reduces the heat gain.
This composite window is expected to better the energy efficiency of buildings located in the high temp fluctuations.
The given question is incomplete The complete question is.
paraffin wax–cs0.33wo3 composite windows with excellent near- infrared shielding and thermal energy storage abilities
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a student stays at her initial position for a bit of time, then walks slowly in a straight line for a while, then stops to rest awhile and finally runs quickly back to her initial position along a straight line.
The displacement versus time plots that best represent the student’s trip will be graph C. Then the correct option is C.
What is kinematics?The examination of motion without taking the mass or the motion's source into account.
The first student spends some hours in the nest position. so that time and location are represented on a graph from t₀ to t₁.
When a pupil moves slowly in a straight line, their position changes, and their speed increases. Thus, location is represented in the graph by "ab" in the time range from t₁ to t₂.
The condition is shown in the time interval from t₂ to t₃ when the person stops and the velocity is nil.
The constant decrease in velocity and displacement occurs as a student sprint back to her starting position.
Then the correct option is C.
The remaining question is attached below.
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object 1 has an irregular shape. its density is 4000 kg/m3 . part a part complete object 2 has the same shape and dimensions as object 1, but it is twice as massive. what is the density of object 2? express your answer in kilograms per cubic meter. rho2
The density of object 2 is 8000kg/m^3.
d=2d=8000kg/m^3
What is density?The substance's density is defined as its mass per unit of volume (volumetric mass density or specific mass). Although the Latin letter D may also be used, the symbol for density that is most usually used is (the lower case Greek letter rho). Mathematically, density is determined by dividing mass by volume.
Weight per unit volume is a common informal definition of density, although this is incorrect scientifically; the exact term is specific weight. The US oil and gas industry serves as one illustration of this.A pure substance's mass concentration in numbers is equal to its density. Density varies greatly between different types of materials and may be significant in terms of packaging, purity, and buoyancy.
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A step-up transformer is designed to have an output voltage of 2200V (rms) when the primary is connected across a 110-V (rms) source. (a) If the primary winding has exactly 80 turns, how many turns are required on the secondary?
The number of turns required on the secondary winding is 1,600 turns.
Number of turns needed in the secondary winding
The number of turns needed in the secondary winding is calculated as follows;
Ns/Np = Es/Ep
where;
Np is number of turns in primary windingNs is number of turns in secondary windingEs is secondary voltageEp is primary or input voltageNs/80 = 2200/110
Ns = 80( 2200/110)
Ns = 1,600 turns
Thus, the number of turns required on the secondary winding is 1,600 turns.
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explain why cooking food with pressure pot is faster than cooking with an ordinary pot
Answer:
Pressure forces heat into food, which triggers the chemical reaction of food. Also entire pot has same temp and pressure. Also successful pressure cooking much like an autoclave requires three things: sustained time, pressure and temperature to be effective.
How can you create an equivalent resistance of 8 ohms from only 10 ohms resistors and 3 ohm resistors?
You should connect two 10 Ohms resistors in parallel and then connect it in series with a 3 Ohms resistors.
How to achieve the desired resistance under these circumstances?In order to achieve the desired resistance under the given circumstances, we would connect two 10 Ohms resistors in parallel and then connect it in series with a 3 Ohms resistors.
Mathematically, the total equivalence resistance of two resistors that are connected in parallel is given by:
1/Rt = 1/R₁ + 1/R₂
1/Rt = 1/10 + 1/10
1/Rt = 2/10
1/Rt = 1/5
Rt = 5 Ohms.
Next, we would connect this 5 Ohms resistor in series with the 3 Ohms resistor:
R₃ = 3 + Rt
R₃ = 3 + 5
R₃ = 8 Ohms.
In conclusion, you can create an equivalent resistance of 8 ohms from only 10 ohms resistors and 3 ohm resistors by connecting two 10 Ohms resistors in parallel and then connect it in series with a 3 Ohms resistors.
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An object accelerates from rest at a constant rate of 4ms-² for a distance 200m. How fast is the object moving at that time? How long did take for the object to reach that velocity?
Answer:
it moves with a speed of 20m/s and for 10 seconds
Explanation:
using Newton's third law of motion ....s=ut +at/2 ....where s is the distance covered....t time taken ;can be found and since the object was at rest the u ....initial velocity will be 0
The object moves with a speed of 20m/s for time 10 sec.
Explain Newton's third law of motion?According to Newton's third law, there is an equal and opposite reaction to every force (action) in nature. When object A pulls on item B, object B pulls back on object A with an equal and opposing force. In other words, interactions lead to forces. The air is diverted downward by an airfoil's action, and the wing is pushed upward as a result. This is the motion of lift from an airfoil.
When a ball is spinning, the air deflects to one side, causing the ball to move in the opposite direction as a response.
When a jet engine is moving, thrust is produced, hot exhaust gases exit the back of the engine, and thrust is generated in the opposite direction.
Using Newton's third law of motion,
where,
s is the distance covered
t time taken ;can be found and since the object was at rest the
u initial velocity will be 0
S = v₀t + [tex]\frac{1}{2}[/tex]at²
S = 0⋅t + [tex]\frac{1}{2}[/tex] ⋅ at²
S = [tex]\frac{1}{2}[/tex] ⋅ at²
t² = [tex]\frac{2s}{a}[/tex]
t² = [tex]\frac{2(200)}{4}[/tex]
t² = 100
t = 10 sec.
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Which of these is a data type that is made up of whole numbers represented as
binary values? (1 point)
object
integer
string
stack
Integers is referred to as the data type that is made up of whole numbers represented as binary values and is therefore denoted as option B.
What is a Data?
This is referred to as discrete values which are used to describe information which could be in different forms such as quantity, quality etc.
Integers is referred to the data type which comprises of whole numbers represented as binary values and it could be zero , a positive or negative number and examples include 0, 1, -2 etc. This is therefore the reason why option B was chosen as the most appropriate choice.
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what is motor effect ? class-10
Answer:
a wire carrying a currents creates a magnetic field this can interact with another magnetic field causing a force that pushes the wire at right angles. This is called the motor effect
Answer asappppp
A book is at rest on a table. Identify the correct free body diagram for this situation
Answer:
Third answer choice
Explanation:
Dot in the middle and Fn and Fg
Hope this helps! :)
Two waves on one string are described by the wave functions
y₁ = 3.0 cos (4.0x - 1.6t) y₂ = 4.0 sin (5.0x - 2.0t) where x and y are in centimeters and t is in seconds. Find the superposition of the waves y₁ + y₂ at the points (b) x = 1.00, t = 0.500 ; and
The resultant superposition of waves is -1.647cm
We are given that
y₁ = 3.0 cos (4.0x - 1.6t)
y₂ = 4.0 sin (5.0x -2.0t)
where x and y are in centimeters and seconds respectively
It is given that resultant wave is y1+y2
at x=1, t=1
y= y1+y2
= 3.0 cos (4.0x - 1.6t) + 4.0 sin (5.0x - 2.0t)
= 3.0 cos ( 4 x 1 -1.6 x1) + 4.0 sin(5 x 1 - 2.0 x 1)
= 3 cos (2.4rad) + 4 sin(3rad)
= -2.212 + 0.5645
= -1.647cm
Hence the superposition of waves is -1.647cm
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two point charges -5 uc and 4 uc charge are 21 cm apart. what is the magnitude of the electric field at a point half-way between the two charges?
The electric field at a point halfway is 18.37 x 10⁵ N/C.
We need to know about the electric fields to solve this problem. The electric field produced by a single-point positive charge is a radial field, whose strength is given by the equation
E = k.Q/r²
where E is the electric field, Q is the charge and r is the radius.
From the question above, we know that
k = 9 x 10⁹ Nm²/C²
Q1 = -5μC = -5 x 10¯⁶ C
Q2 = 4μC = 4 x 10¯⁶ C
x = 21 cm = 0.21 m
from midpoint (r = 0.105 m)
The electric field directly outward from Q2 to Q1 so that the total electric field between the charges will be added up.
Etotal = E1 + E2
Etotal = k.Q1/r² + k.Q2/r²
Etotal = k/r² x (Q1 + Q2)
Etotal = 9 x 10⁹/(0.21)² x (5 x 10¯⁶ + 4 x 10¯⁶)
Etotal = 18.37 x 10⁵ N/C
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1. why did aristarchus choose the time of a half (quarter) moon to make his measurements for calculating the earth-sun distance?
In order to make his measurements for determining the Earth-Sun distance, Aristarchus waited for the Moon's phase to be exactly half full while the Sun was still visible in the sky. For this reason, he chose the time of a half (quarter) moon.
How did Aristarchus calculate the distance to the Sun?It was now possible for another Greek astronomer, Aristarchus, to attempt to determine the Earth's distance from the Sun after learning the distance to the Moon. Aristarchus discovered that the Moon, the Earth, and the Sun formed a right triangle when they were all equally illuminated. Now that he was aware of the distance between the Earth and the Moon, all he needed to know to calculate the Sun's distance was the current angle between the Moon and the Sun. It was a wonderful argument that was weakened by scant evidence. Aristarchus calculated this angle to be 87 degrees using only his eyes, which was not far off from the actual number of 89.83 degrees. But when there are significant distances involved, even slight inaccuracies might suddenly become significant. His outcome was more than a thousand times off.
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an earthquake 45 km from a city produces p and s waves that ravel outward at 5000 and 3000 m/s, respectively. once city residents feel the shaking of the p wave, how much time do they have before the s wave arrives?
By the velocity, the interval time after the p wave arrived is 6 seconds.
We need to know about velocity to solve this problem. Velocity can be determined as the distance traveled divided by time interval. It can be written as
v = s / t
where v is velocity, s is distance and t is the time interval.
From the question above, we know that.
vp = 5000 m/s
vs = 3000 m/s
s = 45 km = 45000 m
Determine the time taken by p wave
tp = s / vp
tp = 45000 / 5000
tp = 9 seconds
Determine the time taken by s wave
ts = s / vs
ts = 45000 / 3000
ts = 15 seconds
The time interval after p waves is
interval time = ts - tp
interval time = 15 - 9
interval time = 6 second
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eska answer batado please
Answer:
01110111 01101000 01111001 0100000 01110100 00100000
5. Suppose you and a friend are test driving a new car. You drive out of the car dealership and go
10 miles east, and then 8 miles south. Then, your friend drives 8 miles west, and 6 miles north.
If you had the dealer's homing pigeon in the car, how far do you think it would have to fly to
get back to the dealership? Use the simulation to test ideas.
• The distance that the bird must fly represents the sum of the 4 displacement vectors. Use the
simulation to test ideas you have about vector addition. After your tests, describe how you can
use the simulation to add vectors.
The displacement of the dealer's homing pigeon in the car is 12.81 miles.
What is displacement?
The displacement of an object is the change in position of an object.
Displacement is a vector quantity because it can be described by both magnitude and direction.
The displacement of the dealer's homing pigeon in the car is calculated as follows;
initial position = 10 miles east
final position = 8 miles south
displacement = √(10² + 8²)
displacement = 12.81 miles
Thus, the displacement of the dealer's homing pigeon in the car is 12.81 miles.
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what is the energy of a photon with a wavelength of 21 nm? hint: treat the planck constant as 7 x 10-34 j*s
The energy of a photon with a wavelength of 21 nm is approximately 9.429 x [tex]10^-^1^6[/tex] Joules.
The energy of a photon can be calculated using Planck's equation:
E = (hc) / λ
Where:
E is the energy of the photon,h is the Planck constant (7 x [tex]10^-^3^4[/tex] Joule-second),c is the speed of light (3.00 x [tex]10^8[/tex] m/s),λ is the wavelength of the photon.Given that the wavelength (λ) is 21 nm (21 x [tex]10^-^9[/tex] m) and using the given value of the Planck constant, we can calculate the energy of the photon:
E = (7 x [tex]10^-^3^4[/tex] x 3.00 x 10^8) / (21 x[tex]10^-^9[/tex] )
When we calculate this, we get the value: 9.429 x [tex]10^-^1^6[/tex] Joules.
Therefore, the energy of a photon with a wavelength of 21 nm is approximately 9.429 x [tex]10^-^1^6[/tex] Joules.
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