ASAP
What instrument(s) is used to measure humidity?

Group of answer choices

A. hygrometer

B. anemometer

C. sling psychrometer

D. barometer

The magnitude of the induced emf in a wire is given by the rate of change of the magnetic field, which is 3.0 mT/s.

According to Faraday's law of electromagnetic induction, the magnitude of the induced electromotive force (emf) in a wire is directly proportional to the rate of change of the magnetic field.

In this case, the magnetic field B points in the positive x direction, and it increases at a rate of 3.0 mT/s (millitesla per second). Therefore, the magnitude of the induced emf in the wire is also 3.0 mT/s. This indicates that for every second the magnetic field increases by 3.0 mT, an emf of 3.0 millivolts is induced in the wire. The direction of the induced emf can be determined using Lenz's law.

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67.65 x 10^5J work is done by the battery charger to recharge a 15.0 v battery, a battery charger must move 4.51×105 c of charge from the negative terminal to the positive terminal.

Given the voltage of battery (V) = 15V

The charge in battery (q) = 4.51×10^5C

The charge moves from negative terminal to the positive terminal.

Let the work done by the battery charger = W

We know that the work done = voltage x charge.

Such that W = qV

W = 15 x 4.51×10^5 = 67.65 x 10^5J

Hence the required work done by the battery charger to move the charge from negative terminal to positive terminal is 67.65 x 10^5J.

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The force points in the opposite direction of the field, from high potential to low potential.

Each point in space has an electric field associated with it when there is charge available in any form. The value of E, often known as the electric field strength, electric field intensity, or just the electric field, expresses the strength and direction of the electric field.

The field lines never overlap one another. The surface of the charge and the field lines are perpendicular. The number of field lines and the charge size are proportionate.

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16 km/h x 8 h = 128 km per day

800 km / 128 km per day = 6.25 days

it will take 6 1/4 days

The statement is true when we insert parentheses following the order of operations (PEMDAS) and the correct statement is (64 / 2) x (4 / 2) = 64.

To make the statement true by inserting parentheses in 64 / 2 x 4 / 2 = 4 we need to insert parentheses that follows the rule of order of operations.

We need to remember PEMDAS which stands for Parentheses, Exponents, Multiplication, Division, Addition, and Subtraction.

We will use this to determine the correct placement of the parentheses

64 / 2 x 4 / 2 can be written as (64 / 2) x (4 / 2).

Let's evaluate this expression:

(64 / 2) x (4 / 2) = 32 x 2

Simplifying further:

32 x 2 = 64.

By inserting parentheses as (64 / 2) x (4 / 2), the statement becomes true, and the result is 64.

Therefore, the statement is true when we insert parentheses following the order of operations (PEMDAS) and the correct statement is (64 / 2) x (4 / 2) = 64.

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Answer:

B. The law of conservation of energy

Explanation:

The law of conservation of energy states that energy can neither be created or destroyed which means that a perpetual motion machine, which creates its own power and energy, cannot be true since energy cannot be created.

The answer to the question is 34.46 m, or the distance covered by the bicycle during the race.

Distance has been the amount of an object's motion, independently of directions. Distance could be described as the amount of space an item has covered, regardless of its starting and ending position.

According to the equation v² = u² + 2 as where;

v(final velocity) of the bicyclist = 26 m/s

u (initial velocity) of the bicyclist = 0 m/s

(acceleration ) a due to gravity = 9.81 m / s

s (distance) covered during travel

To get the distance traveled, substitute the physical parameters into to the calculation above.

26² = 0² + 2(9.81)s

676 = 19.62 s

Divide both sides by 19.62

676 / 19.62 = 19.62s / 19.62

s = 34.46 m

During the race, the cyclist covered a distance of 34.46 m.

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The birdman needs to soar 86.43m in the air to hit the bucket.

The ball's diameter, d, and the amount of time, t, it takes to cross the photogate can both be used to calculate the beginning horizontal velocity. Vo = d/t, then.

Time of motion of the birdman

The duration of the birdman's motion is the amount of time it takes for him to soar to his highest point.

R = Vₓt

where;

R is the birdman's motion's range or his horizontal distance.

Time of motion is t.

The horizontal speed is Vx.

t = R/Vₓ

t = 147/ 35

t = 4.2 seconds

Maximum height the missile has climbed

h = ¹/₂gt²

where;

The birdman's height is measured in h.

Gravitational acceleration, or g,

h = ¹/₂(9.8)(4.2)²

h = 86.43 m

The birdman must therefore fly to a height of 86.43m in order to hit the bucket.

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a) Tidal power can only be generated in locations with a large difference between high and low tides.

Tidal power is generated by controlling the kinetic energy of tidal currents, which are caused by the interactivity of the gravity between the Moon, Sun, and Earth. The tides play an important role in determining the potential for tidal power generation.

Technologies trying to improve the quality and effectiveness of tidal power generation but the basic requirements remain necessary such as the sun, moon, and the earth and the presence of radioactivity does not affect the generation of tides.

Hence the conclusion is that tidal power can only be generated in locations with a large difference between high and low tides.

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The cross-price elasticity between crossing the Golden Gate Bridge and riding the ferry is negative, indicating that the two goods are substitutes.

Cross-price elasticity measures the responsiveness of the quantity demanded of one good to a change in the price of another good. In this case, when the toll to cross the Golden Gate Bridge increases by 20%, the demand for ferry rides across San Francisco Bay is expected to increase. This indicates that the two goods, bridge crossing and ferry rides, are substitutes for each other.

A positive percentage change in price for the Golden Gate Bridge toll leads to a greater percentage change in demand for ferry rides, suggesting that consumers are willing to switch from using the bridge to taking the ferry when the price of crossing the bridge becomes relatively more expensive.

The specific magnitude of the cross-price elasticity can only be determined with precise numerical values for the percentage changes in price and quantity demanded.

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The toll to cross the Golden Gate Bridge increased by 20%, and rides on the ferry to cross San Francisco Bay increased by 60%. The cross-price elasticity between crossing the Golden Gate Bridge and riding the ferry is 3 and the bridge and the ferry are substitute.

The toll to cross the Golden Gate Bridge increased by 20 percent.

Rides on the ferry to cross San Francisco Bay increased by 60 percent.

Cross-price elasticity is calculated as:

Cross-price elasticity = (Percentage change in quantity demanded of one good) / (Percentage change in price of the other good)

Let's figure out the percentage changes in both amount demanded and price for each scenario:

The Golden Gate Bridge should be crossed by:

Percentage change in quantity demanded of crossing the bridge = 0% (since the information about the change in quantity demanded is not given)

Percentage change in price of crossing the bridge = 20%

For riding the ferry:

Percentage change in quantity demanded of riding the ferry = 60%

Percentage change in price of riding the ferry = 0% (since the information about the change in price is not given)

Using the formula for cross-price elasticity:

Cross-price elasticity = (Percentage change in quantity demanded of one good) / (Percentage change in price of the other good)

Cross-price elasticity = (60%)/(20%)

Cross-price elasticity = 3

Consequently, there is a 3 percent cross-price elasticity between using the ferry and crossing the Golden Gate Bridge. The fact that a 1% increase in the price of one product results in a 3% increase in the quantity required of the other good suggests that the two goods are substitutes. So the correct answer is B.

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The complete question is:

The toll to cross the Golden Gate Bridge increased by 20 percent and rides on the ferry to cross San Francisco Bay increased by 60 percent. The cross-price elasticity between crossing the Golden Gate Bridge and riding the ferry is _____ and the bridge and the ferry are _____..

A. 40 percent; substitutes

B. 3; substitutes

C. 0.33; complements

D. -3; complements

Answer: c

Explanation: I passed the test and got this answer right

When the sound gets louder so here the standing wave should be produced.

The standing wave refers to the stationary wave that combined the two waves that should be moved in the inverse directions and contain the similar kind of the amplitude and the frequency.

Also, it leads to the interference where the waves should be superimposed and the energies should be added or canceled out.

Therefore, the third option is correct.  

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Answer: Noise above 70 dB can cause hearing damage

Explanation:

Answer:

The decibel level that starts to have hearing damage is 120 dB.

Explanation:

Answer:

k.e.

1/2 ×2×4=4

1/2×6×4=12

m.

16×2÷4=8

20×2÷4=10

The false statements about the force and acceleration of the car are statements 1, 2, 3, 4, and 6.

1. The net force on the car is zero: False.

The net force on the car is not zero since it is constantly accelerating due to the centripetal force. This force points inward towards the center of the circular track and is provided by the friction between the tires and the track.

2. Both the acceleration and the net force point outward: False.

The acceleration is inward and the net force is inward. This is due to the centripetal force which is pointing inward toward the center of the track.

3. Both the acceleration and the net force on the ground point inward: False.

The acceleration is pointing inward due to the centripetal force, while the net force is pointing outward due to the static friction between the ground and the tires.

4. If there is no friction, the acceleration is outward: False.

The acceleration is always inward due to the centripetal force, even if there is no friction.

5. The net force acting on the car is inversely proportional to the radius of the track: True.

As the radius of the track increases, the net force acting on the car decreases.

6. The car's acceleration is zero: False.

The car's acceleration is not zero, it is constantly accelerating due to the centripetal force.

In conclusion, all of the statements are false except for the fifth statement.

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The value of g at an altitude equal to the radius of the Earth would be 0 N/kg.

The value of g at any point in space is determined by the mass of the object and the distance between the center of mass of the object and the point. At the surface of the Earth, the radius is included in the distance between the center of mass and the point, resulting in a non-zero value of g.

However, at an altitude equal to the radius of the Earth, the distance between the center of mass and the point is infinite, resulting in a zero value of g. This is because the gravitational force becomes weaker as the distance between two objects increases, and at an infinite distance, it becomes negligible. Therefore, the correct answer is 0.

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We will have that kinetic energy is different from potential energy as follows:

Kinetic energy is energy of a moving object, whereas potential energy is energy possessed by matter as a result of its location or structure. [Option C]

(a) immediately after the switch is closed:

IL = 0 A (inductor acts as an open circuit), I2 = 0 A (no current can flow through the circuit)

(b) a long time after the switch has been closed:

IL = 0 A (inductor acts as a short circuit), I2 = 10.0 mA (current flows only through R2)

(c) immediately after the switch is open:

IL = 5.89 mA, I2 = 0.0345 A (current flows through the inductor and R1)

(d) a time 4.712e-04 s after the switch is open:

IL = 1.94 mA, I2 = 0.0345 A (inductor current decreases and current still flows only through R1)

In (a), when the switch is closed after being open for a long time, the inductor acts as an open circuit and no current flows through it. Also, no current can flow through R2, so I2 = 0 A.

In (b), after the switch has been closed for a long time, the inductor acts as a short circuit and all the current flows through R1 and R2. Therefore, I2 = 10.0 mA.

In (c), when the switch is open, the inductor tries to maintain the current flowing through it and acts as a source. The current flows through R1 and the inductor, while no current flows through R2. Therefore, I2 = 0.0345 A.

In (d), the current in the inductor decreases exponentially because of the self-inductance, and some current flows through R1 and R2. Therefore, I2 remains constant at 0.0345 A, and IL decreases to 1.94 mA.

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The length of a simple pendulum is 0.760 m, the pendulum bob has a mass of 365 grams, and it is released at an angle of 12.0 degree to the vertical. The frequency of vibration is approximately 0.364 Hz. The speed of the pendulum bob at the lowest point is not directly provided in the given information, but the total energy stored in the oscillation is approximately 0.394 J.

To determine the frequency of vibration, speed at the lowest point, and total energy stored in the oscillation of the pendulum, we can use the given information and formulas related to pendulum motion.

Given:

Length of the pendulum (L) = 0.760 m

Mass of the pendulum bob (m) = 365 grams = 0.365 kg

Angle to the vertical (θ) = 12.0 degrees

   Frequency of Vibration:

   The frequency of vibration (f) of a simple pendulum can be calculated using the formula:

f = 1 / T

where T is the period of oscillation. The period can be determined using the formula:

T = 2π√(L/g)

where g is the acceleration due to gravity (approximately 9.8 m/s^2).

Plugging in the values:

T = 2π√(0.760 m / 9.8 m/s^2)

T ≈ 2.746 seconds

Now, calculating the frequency:

f = 1 / 2.746 seconds

f ≈ 0.364 Hz

Therefore, the frequency of vibration is approximately 0.364 Hz.

   Speed at the Lowest Point:

   The speed (v) of the pendulum bob at the lowest point of its swing can be determined using the conservation of mechanical energy. At the lowest point, all of the potential energy is converted into kinetic energy.

The potential energy at the highest point (when the pendulum is released) is given by:

PE = mgh

where h is the vertical distance from the highest point to the lowest point.

Since the pendulum bob is released at an angle of 12.0 degrees to the vertical, the vertical distance is h = L(1 - cos θ), where θ is the angle.

Plugging in the values:

h = 0.760 m(1 - cos 12.0 degrees)

h ≈ 0.056 m

PE = (0.365 kg)(9.8 m/s^2)(0.056 m)

PE ≈ 0.197 J

The kinetic energy (KE) at the lowest point is equal to the potential energy:

KE = 0.197 J

The total mechanical energy (E) is the sum of potential and kinetic energy:

E = PE + KE

E = 0.197 J + 0.197 J

E ≈ 0.394 J

Therefore, the speed of the pendulum bob at the lowest point is not directly provided in the given information, but the total energy stored in the oscillation is approximately 0.394 J.

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Electrons are emitted from the cathode with a range of velocities. This phenomenon can be explained by considering the energy distribution of electrons within the cathode material.

Electrons in a metal are in various energy states, which are influenced by factors such as temperature and the presence of an electric field.

When a potential difference is applied across a cathode and an anode, the electric field created between them can cause some electrons in the cathode to gain enough energy to overcome the work function, which is the minimum energy needed for an electron to be emitted from the surface of the metal. The energy of these emitted electrons varies due to their initial energy states and the amount of energy gained from the electric field.

Thermal energy can also play a role in electron emission. At higher temperatures, a greater number of electrons in the cathode have sufficient thermal energy to overcome the work function. These thermally emitted electrons will also exhibit a range of velocities depending on their initial energy states and the amount of thermal energy gained.

In summary, electrons are emitted from the cathode with a range of velocities due to the different energy states within the cathode material and the various energy sources, such as the electric field and thermal energy, that can contribute to overcoming the work function.

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Answer:

The correct option is the second option with horizontal bars at a =  6, a = -1, and a = 4 m/s²

Please find attached the table of values and a graph representing the correct option

Explanation:

The given data can be presented as follows;

Time (s),                 Velocity (m/s),               Acceleration (m/s²)

0,                                    -1,                                        6

0.5,                                   2,                                       6

1,                                       5,                                        6

0,                                      5,                                       -1

0.5,                                  4.5,                                     -1    

1,                                       4,                                       -1

1.5,                                    3.5,                                     -1

2,                                     3,                                        -1

2.5,                                 2.5,                                      -1

3,                                     2,                                         -1

0,                                     2,                                          4

0.5,                                   4,                                         4

1,                                        6,                                        4

1.5,                                    8,                                         4  

2,                                     10,                                         4

From the data, and the graph the acceleration for the period from the time t = 0 to t = 1 is 6 m/s²

From t = 1 to t = 4, the acceleration is constant and equal to -1

From t = 4 to t = 6 the acceleration is also constant and equal to 4

Answer:

102°F fever in Celsius is equivalent to 38.9°C.

Answer:

Larger, because both the Sun and Moon are pulling it.

Explanation:

Answer:

180 [J].

Explanation:

1) the required work [W] can be calculated as difference of the energy: W=E₂-E₁, where E₁=mgh₁ - the energy before lifting, E₂=mgh₂ - the energy after lifting;

2) W=mgh₂-mgh₁, where m - mass; g=10 [N/kg], h - height;

3) then the required work [W]:

W=mg*(h₂-h₁)=30*6=180 [J].

The frequency of the wave on a rope is found to be 20s^-1

The degree of direction changes of current per second is defined as frequency. It is expressed in hertz (Hz), a unit of measurement that is used globally. One hertz is equivalent to one cycle per second. One hertz (Hz) is comparable to one cycle per second.

Speed of wave (V) => 100cm/s

Wavelength λ = 5cm

Wave speed = Frequency X Wavelength

      100cm/s/5cm => frequency (f)

f => 20s^-1

Frequency and wavelength are inversely proportional to one another, as shown by the equation v = f. Any increase in the frequency generates a subsequent fall in wavelength when the velocity remains unchanged. As a result, the correlation between wavelength and frequency is inverse.

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Answer:

b.

Explanation:

The statement is true, Saturn is orbited by at least two geologically active moons, Titan and Enceladus. Titan is the largest moon of Saturn and has a dense atmosphere that is mostly nitrogen. It is the only known moon with a dense atmosphere.

Scientists have found the possibility of the existence of methane seas and lakes on Titan. Additionally, there is evidence that the moon has a subsurface ocean made of water and ammonia.Enceladus is the sixth-largest moon of Saturn. The surface of Enceladus is covered by water ice and has a subsurface ocean. The moon has active geysers, which erupt from its south pole. These geysers spew water vapor, ice, and other materials, which form Saturn's E-ring. Saturn is the sixth planet from the Sun and the second-largest planet in the Solar System, after Jupiter. It is known for its beautiful rings, which are made of ice and rock particles. However, Saturn is also orbited by at least two geologically active moons, Titan and Enceladus. Titan is the largest moon of Saturn and has a dense atmosphere that is mostly nitrogen. It is the only known moon with a dense atmosphere. Scientists have found the possibility of the existence of methane seas and lakes on Titan. Additionally, there is evidence that the moon has a subsurface ocean made of water and ammonia.Enceladus is the sixth-largest moon of Saturn. The surface of Enceladus is covered by water ice and has a subsurface ocean. The moon has active geysers, which erupt from its south pole. These geysers spew water vapor, ice, and other materials, which form Saturn's E-ring. The geysers suggest the existence of liquid water beneath the surface, which is a key factor in the search for life beyond Earth.

In conclusion, Saturn is orbited by at least two geologically active moons, Titan and Enceladus. Titan is the largest moon of Saturn, which has a dense atmosphere and the possibility of the existence of methane seas and lakes and a subsurface ocean made of water and ammonia. Enceladus has a subsurface ocean and active geysers that suggest the existence of liquid water beneath the surface. These moons are of great interest to scientists in the search for life beyond Earth.

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Answer:

B

Explanation:

i got it right on the usatestprep

Answer:

D. The primary source, because it was written by the researcher

Explanation:

One should learn to trust the primary source more because it is the real work of the researcher.

A primary work defines the work of research from his or her experimental findings.