If a receiver is overly selective:
A) the tank circuits within the tuned amplifiers have insufficient Q.
B) too much noise is picked up and amplified by the receiver.
C) only part of the bandwidth of the AM signal is amplified, causing some of the sideband information to be lost and distortion results.
D) the volume control is turned up to maximum, the desired station is very weak.

Answer:

D, -8 F

Explanation:

This specific thermometer is in increments of two degrees per minor line and 10 per thicker line. Since the thermometer is showing below zero, the answer cannot be A or B since they are positive. -4 Cannot be the answer since the line addition does not make sense for that. It would be -4 if the thick line increments were 5 degrees instead of ten. Therefore if you count the lines by two from zero down to the thermometer line, you would get -8 Degrees F

The correct statements are:

1.Noelle has done work.

2.The door has very little inertia.

Explanation:

1.Noelle has done work: Work is defined as the application of force over a displacement. In this scenario, Noelle is applying a force to the door, even though she cannot get it to open. Despite not achieving the desired outcome of opening the door, Noelle is still exerting force and thus doing work.

2.The door has very little inertia: Inertia is the resistance of an object to changes in its state of motion. If the door has very little inertia, it means that it is easier to move or change its motion. This statement implies that the door is not responding to Noelle's force, suggesting that it may be stuck, too heavy, or have some other obstacle preventing it from opening.

3.The statement “Noelle has not done work” and "This is an example of the work principle" is not true because the work principle refers to the concept of work being done when a force is applied and an object is displaced. In this scenario, although Noelle is applying a force, the door is not displaced, so work is not being done on the door.

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Answer:

A. Increasing the voltage of the battery

Explanation:

The relationship between voltage, V, current, I and resistance, R, is given as follows;

V = I × R

∴ I = V/R

From the above relationship, the current flowing in the circuit is directly proportional to the voltage of the battery, and inversely proportional to the resistance, 'R', of the circuit

Therefore, increasing the voltage, 'V', of the battery, increases the total current, 'I', flowing in the circuit.

a. The probability that a randomly selected soda can has a volume less than 12 fluid ounces is approximately 0.3085

b. The probability that the sample mean volume is less than 12 fluid ounces, when a sample of size n = 32 is taken, is approximately 0.0023

c. The distribution of the sample mean becomes narrower and more concentrated around the population mean. Consequently, the probability of obtaining a sample mean less than 12 fluid ounces decreases because the sample mean is less likely to deviate significantly from the population mean.

a) Let X be the volume of a randomly selected soda can. We are given that the mean (μ) is 12.01 fluid ounces and the standard deviation (σ) is 0.02 fluid ounces.

We need to calculate P(X < 12). To do this, we standardize the variable using the z-score formula:

z = (X - μ) / σ

Substituting the given values, we have:

z = (12 - 12.01) / 0.02

= -0.5

Now, we can use a standard normal distribution table or calculator to find the probability associated with the z-score of -0.5. From the table, we find that the probability is approximately 0.3085.

b) When a sample of size n = 32 soda cans is drawn randomly from the population, the mean volume of the sample (denoted by X-bar) follows a normal distribution with the same mean (μ = 12.01 fluid ounces) but a smaller standard deviation (σ-bar) given by:

σ-bar = σ / sqrt(n)

Substituting the values, we have:

σ-bar = \(0.02 / \sqrt{(32)\)

= 0.02 / 5.6569

≈ 0.00354

Now, we need to calculate P(X-bar < 12). Again, we standardize the variable using the z-score formula:

z = (X-bar - μ) / σ-bar

Substituting the given values, we have:

z = (12 - 12.01) / 0.00354

≈ -2.8249

Using the standard normal distribution table or calculator, we find that the probability associated with the z-score of -2.8249 is approximately 0.0023.

c) As larger and larger sample sizes are taken, the probability that the sample mean volume is less than 12 fluid ounces tends to decrease. This is because as the sample size increases, the sample mean becomes a better estimate of the population mean. The larger the sample size, the more reliable and representative the sample mean is of the true mean. Hence, the sample mean is more likely to be closer to the population mean.

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Answer:

D.) A 15 kg mass moving at 2.0 m/s

Explanation:

The inertia of an object is most directly related to its mass and not the magnitude of the velocity.

So, the higher the mass of an object, the more its inertia.

According to Newton's first law of motion "an object will remain in its state of rest or of constant motion unless it is acted upon by an external force".

Explanation:

A lightning rod (US, AUS) If lightning hits the structure:-

It will preferentially strike the rod and be conducted to ground through a wire.

Instead of passing through the structure, where it could start a fire or cause electrocution.

The parts of a lightning protection system are air terminals (lightning rods or strike) and all of the connectors and supports to complete the system.

Answer:

B. Solid rock breaks apart.

Explanation:

Answer:

B

Explanation:

I did it on a test lol

Answer:

for every action, there is a equal and opposite reaction

Explanation:

Answer:6/1 %50 x11

Explanation:

25-45

Answer:

there is an option for uploading the pic of a diagram while posing any question on brainly. hope you use that feature of the app to upload graph of your question so that it can be well answered

Answer: It’s A!

Explanation: I took the test

Answer:

An increase in temperature typically increases the rate of reaction. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision.

Answer:

When we increase the temperature in a chemical reaction, this increases the particles kinetic energy, making them move much faster than they were before. This also increases collision between the particles and the rate of reaction.

The ratio of the work done lifting the box directly to the work done lifting the box with a pulley is: 1.

To find the ratio of work done lifting the box directly (WD) to the work done lifting the box with a pulley (WP), we need to calculate the work done in each case.

1. Lifting the box directly:
Work done (WD) = Force × Distance × cosθ
Here, Force = mg (mass × acceleration due to gravity), Distance = h, and cosθ = 1 (as the force and displacement are in the same direction)
So, WD = mg × h × 1

2. Lifting the box with a pulley:
Work done (WP) = Force × Distance × cosθ
Here, Force = mg, Distance = h, and cosθ = 1 (as the force and displacement are in the same direction)
So, WP = mg × h × 1

Now, let's calculate the ratio WD/WP:
WD/WP = (mg × h × 1) / (mg × h × 1)

The mass (m) and acceleration due to gravity (g) terms cancel each other out, and we get:
WD/WP = 1

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Answer:

The reason it has few heavier elements is due to the fact that it's stars are widely spaced and this implies that it's stars have very low rate of formation and termination.

Explanation:

The Small Magellanic Cloud, is basically a very tiny galaxy located near the Milky Way. Although it's tiny, it's diameter is approximately 7,000 light-years while it also contains over hundred million stars which are widely spaced.

Now, the reason it has few heavier elements is due to the fact that it's stars are widely spaced and this implies that it's stars have very low rate of formation and termination.

Answer:

using V= IR

I= 11Ampere

\( \mathfrak{\huge{ \mathfrak{  \underline{ Answer }}}\:  ✓ }\)

We know, hot water has more energy than the cold water , so when cold water is added in the beaker then heat transfer occurs from hot water to cold water to balance the Energy, causing the drop of temperature from 70° C to 40° C.

Note : Heat transfers occurs from hotter object to cooler one.

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The equivalent resistance of the series circuit is \(6\Omega\).

The equivalent resistance of the parallel circuit is \(14\Omega\).

The parallel circuit has a higher equivalent resistance.

Equivalent resistance represents the total resistance that an ideal resistor would have if it were connected in place of the entire circuit.

The equivalent resistance can be found for a series circuit by simply adding the given resistances. Hence, if the resistances connected in a series are \(R_1, R_2, R_3,......, R_n\) then the equivalent resistance can be given by,

\(R_S=R_1+R_2+R_3+......+R_n\).

The given resistances connected in series are \(2 \Omega\) and \(4 \Omega\). Therefore, the equivalent resistance of the series circuit can be given by,

\(R_S=(2+4)\Omega\\\Rightarrow R_S=6 \Omega\)

The equivalent resistance of the series circuit is \(6\Omega\).

The reciprocal of the equivalent resistance of a parallel circuit can be found by adding the reciprocal of the given resistances. Hence, if the resistances connected in parallel are \(R_1, R_2, R_3,......, R_n\) then the equivalent resistance can be given by,

\(\frac{1}{R_P}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+.....+\frac{1}{R_n}\).

The given resistances connected in parallel are \(21 \Omega\) and \(42 \Omega\). Therefore, the equivalent resistance of the series circuit can be given by,

\(\frac{1}{R_P}=\frac{1}{21}+\frac{1}{42}\\\Rightarrow \frac{1}{R_P}=\frac{2+1}{42}\\\Rightarrow \frac{1}{R_P}=\frac{3}{42}\\\Rightarrow \frac{1}{R_P}=\frac{1}{14}\\\Rightarrow R_P=14 \Omega\)

The equivalent resistance of the parallel circuit is \(14\Omega\).

So, the parallel circuit has a higher equivalent resistance.

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Answer:

106.25 m

Explanation:

Acceleration a = force / mass

= 40 / 80 = 0.5 m /s²

initial velocity u = 20 m /s

a = 0.5 m /s²

time t = 5 s

displacement s = ?

s = ut + 1/2 a t²

= 20 x 5 + .5 x .5 x 5²

= 100 + 6.25

= 106.25 m .

Answer:

F = Q V X B

V X B = south X downard = East - deflection is West

Since Q is negative the deflection = West

a = F / m = Q V B / m

a = 1.6E-19 * 5*E6 * 3.5E-5 / 9.1E-31

a = 1.6 * 5 * 3.5 / 9.1 * 10^13 m/s^2 = 3.1 * 10^13 m/s^2

The correct option is D, at the end of the story "The Farmer and the Turnip?" the event happen is La planta salió.

"The Farmer and the Turnip" is a popular children's fable that tells the story of a farmer who needs to pull a turnip out of the ground. The turnip is so big that he cannot do it alone, and he enlists the help of his family, friends, and even his animals to pull it out.

The farmer starts by pulling on the turnip himself, but he cannot do it alone. He then asks his wife for help, but they still cannot pull the turnip out. The farmer then enlists the help of his daughter, his son, and even the family dog and cat, but they all fail. The farmer comes up with a plan to tie a rope around the turnip and have everyone pull together.

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Complete Question: -

Which event happened at the end of the story "The Farmer and the Turnip?"

a. El campesino plantó unas semillas.

b. El campesino agarró la planta.

c. La hija agarró a la esposa.

d. La planta salió.

If you wax the hood of a car, when it rains, the raindrops do not stick to the car. Instead, they BEAD UP on the car (bonding with other water molecules) due to adhesion. So the correct option is D.

Adhesion is a property in which a substance with the same properties will unite when they come into contact, staying attached by the force of intermolecular bonds.

As in the example, the water molecules are going to be in an environment where the wax molecules are going to have neutral charges, they are going to be more potentiated to unite with each other due to their different positive and negative charges, which will make them unite closely. This will then cause the water molecules to join together to form water droplets on the surface of the car instead of just spreading.

Therefore, we can confirm that the correct option is D. adhesion.

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The velocity of the trolleys after the collision will be 0.84 m/sec. Both collide and stick together and move with the same velocity.

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

The given data in the problem is;

(m₁) is the mass of S=  200 g  =0.2 Kg

(u₁) is the initial velocity of S= 0 m/s

(m₂) is the mass T= 3 x 10⁻¹ kg

(u₂) is the initial velocity of T =  1.4 m/s

(v) is the velocity after collision =.?

According to the law of conservation of momentum;

Momentum before collision =Momentum after collision

\(\rm m_1u_1 + m_2u_2 = v(m_1 + m_2)\\\\ 3 \times 10^{-1} \times 1.4 + 0.2 \times 0 = v(0.3+0.2) \\\\ 0.5v=0.42 \\\\ v= 0.84 \ m/sec\)

Hence, the velocity of the trolleys after the collision will be 0.84 m/sec.

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Shale,sandstone, and limestone are the most common types of sedimentary rocks.

The vertical airflow in a cyclone is a crucial component of its atmospheric circulation, driving convergence aloft, cloud development, and precipitation.

In a cyclone, the atmospheric circulation involves a counterclockwise flow of air, creating vertical airflow that spirals inward towards the center of the low-pressure system. This vertical airflow results in convergence aloft, where air from different directions is forced to rise and converge at the center of the cyclone. As the air rises, it cools and condenses, leading to cloud development and precipitation.The vertical airflow in a cyclone is driven by the Coriolis effect, which causes air to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This deflection creates the spiral pattern of the cyclone, with the strongest winds and heaviest precipitation located near the center of the system.
Overall, Understanding this process is essential for weather forecasting and predicting the impacts of cyclones on affected regions.

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Complete question:

You would expect vertical airflow in a cyclone to result in:

a. convergence aloft.

b. no cloud development.

c. divergence aloft.

d. divergence at the surface

Answer:

3 m/s ^2 rounded to one signifiicant figure.

Explanation:

Hope this helped!

The force that cannot be neglected when analyzing the motion of the astronaut is the gravitational force between the astronaut and the asteroid. The correct answer is option D.

In this scenario, when analyzing the motion of the astronaut, the force that cannot be neglected is the gravitational force between the astronaut and the asteroid.

The gravitational force is the primary force responsible for the interaction between objects with mass. It is the force that keeps the astronaut and the asteroid in contact when standing on the surface. When the astronaut falls back to the surface, it is the gravitational force that causes the acceleration and motion.

The other forces mentioned, such as the electromagnetic force, the strong nuclear force, and the weak nuclear force, are fundamental forces that operate at subatomic scales.

They are significantly stronger than the gravitational force at those scales. However, at the macroscopic level of an astronaut and an asteroid, these forces have negligible effects compared to gravity and can be safely neglected in the analysis of the motion.

Therefore, the force that cannot be neglected when analyzing the motion of the astronaut is the gravitational force between the astronaut and the asteroid. The correct answer is option D.

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Answer:

Density = Mass / Volume

Mass = Density * volume = 1.6 gm/cm^3 * (7.5 * 12.5 * 2.2) cm^3

Mass = 1.6 gm/cm^3 * (206 cm^3) = 330 gm

Answer:

I don't understand

Explanation: