If a scientist is designing a device to create high energy electromagnetic waves, which type of wave would the device most likely create?
А
microwaves
B
infrared waves
с
ultraviolet waves
D
gamma ray waves
Answers
Related Questions
Compound 1 has a composition of 46.7 mass% of element A and 53.3 mass% of element B. A and B also form a second binary compound 2 with 30.4mass% of A and 69.6 mass% of B. Show that the data are consistent with the law of multiple proportions.
Answers
The data are consistent with the law of multiple proportions, as the ratios of element A to element B in each compound can be reduced to small whole numbers.
The law of multiple proportions states that when two elements combine to form two or more compounds, the masses of one element that combine with a fixed mass of the other element are in a ratio of small whole numbers. For compound 1, the mass of element A is 46.7 mass%, and the mass of element B is 53.3 mass%. For compound 2, the mass of element A is 30.4 mass%, and the mass of element B is 69.6 mass%.
The ratio of element A in compound 1 to element A in compound 2 is 46.7/30.4 = 1.54. The ratio of element B in compound 1 to element B in compound 2 is 53.3/69.6 = 0.764. The ratio of element A in compound 1 to element B in compound 1 is 46.7/53.3 = 0.875. The ratio of element A in compound 2 to element B in compound 2 is 30.4/69.6 = 0.436. These ratios can be simplified to 3:2:2:1, which are small whole numbers and therefore consistent with the law of multiple proportions.
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Read the sentences below, and indicate which accurately describe the effects of Earth's rotation and the angle of the Sun. Select all that apply. View Available Hint(s) Select all that apply. The tilt of Earth and the latitude of a city affect the degree and amount of direct sunlight that the location receives at the winter solstice. From the spring equinox until the fall equinox, the Sun shines continually at the North Pole (for 6 months). However, temperatures during this time never get very warm due to the high angle of the Sun striking Earth at the poles. The circumference of Earth at the equator is 24,900 miles. Based on this, a person at the equator is rotating 1040 miles per hour. (Round to the nearest tens digit.) You see the Sun directly overhead in Anchorage, Alaska, at 60° N on the summer solstice. This indicates that Earth is tilted at a 50° angle.
Answers
Answer:
A. The tilt of Earth and the latitude of a city affect the degree and amount of direct sunlight that the location receives at the winter solstice.
B. temperatures during this time never get very warm due to the high angle of the Sun striking Earth at the poles.
Explanation:
Tilting of earth is responsible for the presence of seasons on the planet earth. if there is no tilting occurs, no seasons will be formed. This tilting change the climate of the different areas. Due to tilting of earth, winter season occurs in different regions of the earth because direct sunlight is not coming on that tilted part. The poles are very cold because direct sunlight does not received by the poles while the equator receives direct sunlight so it get very warm.
which object would have the most kinetic energy?
Answers
Answer:
I believe the answer is C
Explanation:
The mouse would run faster because it has mass.
Answer:
A
Explanation:
A-P-E-X
You are on a train traveling east at speed of 12 m/s with respect to the ground.
1)
If you walk east toward the front of the train, with a speed of 2.4 m/s with respect to the train, what is your velocity with respect to the ground?
m/s east
2)
If you walk west toward the back of the train, with a speed of 3.6 m/s with respect to the train, what is your velocity with respect to the ground?
m/s east
3)
Your friend is sitting on another train traveling west at 15 m/s. As you walk toward the back of your train at 3.6 m/s, what is your velocity with respect to your friend?
m/s east
Answers
Velocity of the train with respect to the ground = 12 m/s (east)
Velocity of walking with respect to the train = 2.4 m/s (east)
Adding these velocities together, we get:
Velocity with respect to the ground = 12 m/s + 2.4 m/s = 14.4 m/s (east)
Therefore, your velocity with respect to the ground when walking east toward the front of the train is 14.4 m/s east.
To determine your velocity with respect to the ground when walking west toward the back of the train, we can subtract your velocity with respect to the train from the velocity of the train with respect to the ground.Velocity of the train with respect to the ground = 12 m/s (east)
Velocity of walking with respect to the train = 3.6 m/s (west)
Subtracting these velocities, we get:
Velocity with respect to the ground = 12 m/s - 3.6 m/s = 8.4 m/s (east)
Therefore, your velocity with respect to the ground when walking west toward the back of the train is 8.4 m/s east.
To determine your velocity with respect to your friend, we need to consider their relative motion. Since your friend is on another train traveling west, their velocity with respect to the ground is in the opposite direction to your train's velocity.Velocity of the train with respect to the ground = 12 m/s (east)
Velocity of your friend's train with respect to the ground = 15 m/s (west)
Velocity of walking with respect to the train = 3.6 m/s (west)
To find your velocity with respect to your friend, we subtract the velocity of their train from the sum of your velocity with respect to the train and the velocity of your train with respect to the ground:
Velocity with respect to your friend = Velocity of walking with respect to the train + Velocity of the train with respect to the ground - Velocity of your friend's train with respect to the ground
Velocity with respect to your friend = 3.6 m/s + 12 m/s - 15 m/s = 0.6 m/s (east)
Therefore, your velocity with respect to your friend is 0.6 m/s east as you walk toward the back of your train.
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The Law of Conservation of Momentum states that Momentum between two moving
objects is conserved when those two objects collide.
Consider the following:
Two cars are moving in the same direction, one behind the other. The rear car is moving
with a momentum of 50 kg*m/s, and the front car moves with a momentum of 100
kg*m/s. The cars have a combined momentum of 150 kg*m/s.
The rear car HITS the car in front of it, but no brakes or other stopping forces are
applied. The rear car's momentum changes to 40 kg*m/s. What is the new momentum
front car?
Answers
Answer:
As stated, the momentum of the system is conserved during the collision (even the kinetic energy is not - some energy is lost to heat, deformation, etc)
M1 V1 = M2 V2 expresses momentum conservation
150 kg-m/s = (40 + X) kg-m/s
X = 110 kg-m/s is the new momentum of the front car
More specifically,
M1 V1 + M2 V2 = M1 V1' + M2 V2'
how can titan keep an atmosphere when it is only slightly larger than airless mercury?
Answers
Titan is able to keep an atmosphere because it has a much stronger gravitational pull than Mercury, despite being only slightly larger.
Additionally, Titan's atmosphere is primarily composed of nitrogen, which has a relatively low escape velocity compared to other gases. This means that even though Titan's gravity is weaker than some other planets, it is still strong enough to hold onto the nitrogen molecules and keep them from escaping into space. The presence of methane and other hydrocarbons on the surface of Titan also helps to maintain its atmosphere through a process known as "methane rain," in which these molecules evaporate and then condense back onto the surface, cycling them back into the atmosphere.
Titan, the largest moon of Saturn, is able to keep an atmosphere despite its relatively small size because of a combination of factors, including its low surface temperature and the composition of its atmosphere.
Firstly, Titan's surface temperature is extremely cold, averaging around -180 degrees Celsius (-292 degrees Fahrenheit). This low temperature means that the gases in Titan's atmosphere move much more slowly than they would at higher temperatures, which reduces the rate at which they escape into space. This effect is known as "thermal escape," and is a major factor in determining whether a planet or moon can maintain an atmosphere.
Secondly, Titan's atmosphere is composed primarily of nitrogen, which is a relatively heavy gas compared to hydrogen and helium, the two lightest elements in the universe. This means that nitrogen is less likely to be lost to space due to thermal escape, because it has a lower average velocity than lighter gases.
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which of the following is suitable to make a cable out of metal?
a. hard
b. insulative
c. ductile
d. elastic
Answers
Reasoning: ductile means able to be drawn out into a thin wire.
1. Light traveling through air (n = 1.000293) strikes an ice cube (n = 1.309) at a 30° angle, Determine the angle at which the light refracts when it enters the ice cube.
Answers
Answer:
The angle at which light bends or refracts as it passes from one medium to another is given by Snell's law, which states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the indices of refraction of the two media:
n1 sin(θ1) = n2 sin(θ2)
where n1 and n2 are the indices of refraction of the two media, θ1 is the angle of incidence, and θ2 is the angle of refraction.
In this problem, we are given that light is traveling through air with an index of refraction of n1 = 1.000293 and strikes an ice cube with an index of refraction of n2 = 1.309 at an angle of incidence of θ1 = 30°. We are asked to find the angle of refraction θ2.
Substituting the given values into Snell's law, we get:
1.000293 sin(30°) = 1.309 sin(θ2)
Solving for sin(θ2), we get:
sin(θ2) = (1.000293 / 1.309) sin(30°) = 0.5033
Taking the inverse sine of both sides, we get:
θ2 = sin^(-1)(0.5033) = 30.22°
Therefore, the angle at which the light refracts when it enters the ice cube is approximately 30.22°.
Calculate the density of mass 150 grams and volume 35 〖cm〗^3
Answers
Explanation:
Mass =150g = 0.15kg
Volume= 35cm^3 = 0.35m^3
Density= Mass×Volume
= 0.15kg × 0.35m^3
= 0.05 kg m^3
(c) Life testing was made on six non-replaceable) electrical lamps and the following results were obtained. Calculate MTTF. (5 Marks)
Answers
MTTF or Mean Time to Failure can be calculated using the given data. The term MTTF is often used to describe the expected lifetime of electronic devices and other items.
Here is how to calculate MTTF when given data:(c) Life testing was made on six non-replaceable) electrical lamps and the following results were obtained.
Calculate MTTF.The following data has been given:Number of lamps, n = 6Total time, T = 10000 hoursFailures, f = 2MTTF formula is given as:MTTF = T / n * fWhere, T = total time during which the test was conducted.n = the number of items tested.f = the number of items failed.Using the given data, we can calculate the value of MTTF as follows:MTTF = T / n * f = 10000 / 6 * 2= 1666.67 hoursTherefore, the MTTF of the six non-replaceable electrical lamps is 1666.67 hours.
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How long has Pripyat been unoccupied?
Answers
The numbers of years that Pripyat been unoccupied is 36 years.
Why was Pripyat left behind?"The Chernobyl tragedy damaged the ecology irreparably, and the effects will continue for thousands of years." Due to excessive radiation levels, the area was evacuated, and Pripyat, a once-vibrant city of 50,000 people that included many nuclear plant workers, was left in ruins. Its urban landscape become covered with trees and vines over time.
Therefore, According to experts, the region won't be secure for at least 3,000 years; nevertheless, other people think this estimate is overly optimistic. A 2016 research states that it is anticipated that the reactor site won't be livable for at least 20,000 years.
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A train travels 120 miles in 2.5 hours. What is its average speed?
Answers
Answer: 48 mph
Explanation: 48*2.5=120
what is required to cause a body of mass 500g to accelerate uniformly from rest across a smooth horizontal surface so that it will cover a distance of 20 tometre in 4 seconds .
Answers
A constant force of 1.25N
Explanation:
This is a kinematics problem.
First find acceleration,
then use F = ma to find force.
Given:
mass = .5kg
delta x = 20m
t = 4s
a = ?
Friction = 0
From the kinematics equations:
delta x = Vi + (1/2)at^2
Plug in terms that are given:
20m = 0 + (1/2)a(4^2)
(2*20m)/(16s^2) = a
40m/(16s^2)= 2.5m/s^2
Now use F = ma to find force exerted on object.
F = (0.5kg)*(2.5m/s^2)
F = 1.25N
A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air? Part 1 of 2 The speed of the plane in still air is Part 2
Answers
The speed of the wind is 17 mph and the speed of the plane in still air is 119 mph.
Let the speed of the plane be x and the speed of the wind be y. Then, the speed of the plane with the wind becomes x + y, while the speed of the plane against the wind is x - y.
The distance traveled with the wind in 3 hours is 408 miles.
Therefore, we can write the equation as:
3(x + y) = 408
Divide both sides by 3:
x + y = 136 .... (1)
The distance traveled against the wind in 4 hours is also 408 miles.
Therefore, the equation can be written as:
4(x - y) = 408
Divide both sides by 4:
x - y = 102 .... (2)
Now we can solve these two equations using the elimination method.
Add equations (1) and (2):
x + y + x - y = 136 + 1022x = 238x = 119 mph
Therefore, the speed of the plane in still air is 119 mph.
Now, substitute this value of x in equation (1):
119 + y = 136y = 17 mph
Therefore, the speed of the wind is 17 mph.
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The correct question is:
A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air?
Question 4 of 25
Which color of visible light has a longer wavelength than yellow light?
A. Green
B. Violet
C. Orange
D. Blue
SUBMIT
HELP ASAP
Answers
Answer:
hehe c
Explanation:
c
Answer:
Orange
Explanation: i just did the test i got it right hehe yay
Two squares of wire like that in the previous question are placed side by side on a table with a distance of 3 cm between the closest sides of the two squares. A 15 mA current passes counterclockwise through both squares. What is the resulting force between the two squares? Is it attractive or repulsive?
Answers
The total magnetic field at the center point between the two squares is \(2 *10^{(-4)}\) Tesla.
Let's assume the current passing through each square of wire is I = 15 mA = \(15 *10^{(-3)} A\).
The magnetic field produced by a square wire at its center can be calculated using the formula for the magnetic field of a long straight wire:
B = (μ₀ * I) / (2 * π * r)
Where:
B is the magnetic field
μ₀ is the permeability of free space\((4\pi × 10^{(-7)} T.m/A)\)
I is the current
r is the distance from the wire
For each square wire, the distance from its center to the center point between the two squares is 1.5 cm = 0.015 m.
Calculating the magnetic field produced by each square wire:
B1 =\((4\pi * 10^{(-7)} T.m/A * 15 * 10^{(-3)} A) / (2 *\pi * 0.015 m)\)
B1 =\(10^{(-4)} T\)
Since the current passes through both squares in a counterclockwise direction, the magnetic fields produced by both squares will have the same magnitude and direction.
Therefore, the total magnetic field at the center point between the two squares is:
B_total = B1 + B1
B_total =\(2 * 10^{(-4)} T\)
B_total = \(2 *10^{(-4)} T\)
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--The complete Question is, Two squares of wire, each with a side length of 4 cm, are placed side by side on a table with a distance of 3 cm between the closest sides of the two squares. A 15 mA current passes counterclockwise through both squares. What is the total magnetic field at the center point between the two squares?--
On which part of a slope would rocks tend to fall at the highest speed?A) concave slopeB) convex slopeC) debris slopeD) free face
Answers
Rocks would tend to fall at the highest speed on the free face of a slope due to the absence of hindrances.
The free face of a slope is the portion that is not supported by any underlying material or structures, allowing rocks to fall freely under the influence of gravity. Without any obstructions, rocks on the free face can accelerate and gain momentum as they descend.
Due to the absence of hindrances, rocks on the free face of a slope will generally fall at the highest speed compared to other parts of the slope such as concave slopes, convex slopes, or debris slopes.
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Acceleration is a change in what quantity Over time?A- speed B- distance C- force D- displacement
Answers
To find
Acceleration is a change in what quantity Over time?
Explanation
Acceleration is defined as the change in velocity with respect to time interval.
Conclusion
The required quantity is
A. speed
What is the average power supplied by a 600 N student running up a flight of stairs rising vertically 4.0 m in 4.2 s?
A.630 W
B.571 W
C.2400 W
D.35.7 W
Answers
C. 2400 W. The average power supplied by the student running up the flight of stairs is 2400 watts. To calculate the average power supplied by the student, we can use the formula:
Power = Work / Time,
where Power is measured in watts (W), Work is measured in joules (J), and Time is measured in seconds (s).
The work done by the student is given by:
Work = Force × Distance,
where Force is the force applied by the student and Distance is the vertical distance traveled.
Given:
Force = 600 N,
Distance = 4.0 m,
Time = 4.2 s.
First, let's calculate the work done:
Work = 600 N × 4.0 m = 2400 J.
Next, we can calculate the average power:
Power = Work / Time = 2400 J / 4.2 s.
Calculating this expression, we find the average power supplied by the student.
Now, let's evaluate the answer options:
A. 630 W
B. 571 W
C. 2400 W
D. 35.7 W
By comparing the calculated value of the average power with the given answer options, we find that the correct answer is:
C. 2400 W.
Therefore, the average power supplied by the student running up the flight of stairs is 2400 watts.
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The magnitude of a force is:
A) How fast an object moves when it is pushed
B) How far an object moves when it is pushed
C) how hard an object is pushed or pulled
D) how long it takes to push or pull an object
Answers
Answer:
c
Explanation:
force is how hard it is pulled or pushed
Properties of helium
Answers
Answer:
Helium has many unique properties: low boiling point, low density, low solubility, high thermal conductivity and inertness, so it is use for any application which can explioit these properties. Helium was the first gas used for filling balloons and dirigibles
What quantity is the sum of the kinetic energy and all forms of potential
energy in a system?
Answers
One clue we can observe that means a chemical reaction has occurred is the formation of light. What is one chemical reaction you can think of that causes light?
Answers
Answer:
There are five signs of a chemical change:
Color Change.
Production of an odor.
Change of Temperature.
Evolution of a gas (formation of bubbles)
Precipitate (formation of a solid)
Explanation:
I just went ahead and gave you the five signs of chemical change hoped it helped
Can anyone please help
Answers
a) The motion of the object between 15 s to 30 s is increasing velocity, to a constant velocity and finally a decreasing velocity.
(b) The average velocity of the object between 0 and 15 seconds is 0.167 m/s.
(c) The position of the object at 5.0 seconds is 0.5 m.
(d) Between 30 and 40 seconds, the velocity of the object is decreasing and the object is decelerating.
What is the motion of the object?(a) The motion of the object between 15 s to 30 s can be described as increasing velocity, to a constant velocity and finally a decreasing velocity.
(b) The average velocity of the object between 0 and 15 seconds is calculated as;
average velocity = total displacement / total time
average velocity = (2.5 m - 0 m ) / ( 15 s - 0 s ) = 0.167 m/s
(c) The position of the object at 5.0 seconds is calculated as follows;
at 5.0 seconds, the position of the object is traced from the graph as 0.5 m.
(d) The motion of the object between 30 and 40 seconds is calculated as;
velocity = ( 0 m - 4 m ) / ( 40 s - 30 s ) = - 0.4 m/s
Between 30 and 40 seconds, the velocity of the object is decreasing and the object is decelerating.
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please help! also specify if you are saying the question letter or the letter on the track when u answer :)
Answers
9. If the frequency of a certain light is 3.8 x 1024 Hz, what is the energy of this light?
Answers
Answer:
E=hf
Were, h = Planck constant 6.67*10^11
E=3.8*10^24 * 6.67*10^11= 2.508*q0^36j
prove that the sum of convex functuons is again convex
Answers
To prove that the sum of convex functions is again convex, we have to consider the definition of a convex function and then provide the proof. Let's start with the definition of a convex function.
What is a convex function?
A convex function is a function that is defined on an interval and whose graph lies above the line segment joining any two points on the interval. In other words, the function of any weighted average of two points on the interval must be less than or equal to the weighted average of the function values at those points. Now let's move on to the proof.Proof:Let f(x) and g(x) be two convex functions on an interval I, and let α and β be two positive numbers such that α + β = 1. We have to show that the function h(x) = αf(x) + βg(x) is also convex.To do this, we must show that for any two points a and b in I and for any α and β between 0 and 1 such that α + β = 1, we have: h(αa + βb) ≤ αh(a) + βh(b)This inequality can be proved as follows:h(αa + βb) = αf(αa + βb) + βg(αa + βb)≤ α[f(a) + f(b)] + β[g(a) + g(b)] [since f(x) and g(x) are convex]≤ αf(a) + βf(b) + αg(a) + βg(b)= αh(a) + βh(b)Thus, h(x) = αf(x) + βg(x) is also a convex function.
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A 41 g Ice cube at -21 C is dropped into a container of water at 0 C. How much water freezes onto the ice? The specific heat of ice is .5 cal/g C and it's heat of fusion of is 80 cal/g.
Answers
Answer:
The right solution is "5.38 grams".
Explanation:
The given values are:
Heat of fusion,
L = 80 cal/g
Mass of ice cube,
\(m_{ice} = 41 \ g\)
Specific heat of ice,
\(C_{ice}=0.5 \ cal/g\)
Let,
Gram of water freezes will be "m".
⇒ \(mL=m_{ice} C_{ice} (0+21)\)
Or,
⇒ \(m=\frac{m_{ice} C_{ice} (0+21)}{L}\)
On substituting the values, we get
⇒ \(=\frac{41\times 0.5\times 21}{80}\)
⇒ \(=\frac{430.5}{80}\)
⇒ \(=5.38 \ grams\)
when a mass m hangs from a vertical wire of length l, waves travel on this wire with a speed v.A. what will be the speed of these waves if we triple M without stretching the wire?
B. what will be the speed of these waves if we replace the wire with an identical one, except twice as long?
C. What will be the speed of these waves if we replace the wire with one of the same length, but two times as heavy
D. what will be the speed of these waves if we stretch the wire to thrice its original length
E. What will be the speed of these waves (in terms of V) if we increase M by a factor of 18.0, which stretches the wire to double its origina length?
Answers
A. The speed of the waves will remain unchanged if the mass is tripled without stretching the wire.
B. The speed of the waves will be halved if the wire is replaced with an identical one, except twice as long. This is because the waves will have to travel twice the distance in the same amount of time.
C. The speed of the waves will remain unchanged if the wire is replaced with one of the same lengths, but two times as heavy.
D. The speed of the waves will be halved if the wire is stretched to thrice its original length. This is because the waves will have to travel thrice the distance in the same amount of time.
E. The speed of the waves will be halved if the mass is increased by a factor of 18.0 and the wire is stretched to double its original length. This is because the waves will have to travel twice the distance in the same amount of time. The speed of the waves will thus be V/2.
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A student swings a 0. 5kg rubber ball attached to a string over her head in a horizontal, circular path. The string is 1. 5
meters long and in 60 seconds the ball makes 120 complete circles.
What is the velocity of the ball?
What is the ball’s centripetal acceleration?
What is the ball’s centripetal force?
Answers
The velocity of the ball = 18.84 rad/sec
The centripetal acceleration of the ball = 236.63 m/s²
The centripetal force of the ball = 118.32 N
The mass of the ball = 0.5 kg
The length of the string = 1.5
The time taken = 60 s
The number of rotations = 120
The velocity of the ball can be found using the formula,
ω = θ / t
where ω is the angular velocity
θ is the angular rotation
t is the time taken
Let us substitute the known values in the above equation, we get
ω = (120 x 2 x 3.14 x 1.5 ) / 60
= 1,130.4 / 60
= 18.84 radians/sec
The formula for centripetal acceleration is
α = ω² / r
= 18.84² / 1.5
= 345.95 / 1.5
= 236.63 m / s²
The centripetal force is
F = mω² / r
= 0.5 x 236.63
= 118.32 N
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