Two positive charges; q1 = 67 nC and q2
=43 nC, are a distance d = 8 mm apart. q1 is to the left
of q2, and the charges sit on the x-axis.
a) Find the force q1 exerts on q2.
b) Find the force q2 exert

Answer:

300 Hz.

Explanation:

The frequency of a sound wave is the same as that of the source. For example, a tuning fork vibrating at a given frequency would produce sound waves that oscillate at the same frequency.

The frequency that you will hear when the tuning fork is stuck against a table is 300 Hz.

Frequency is a measurement of how often a repetitive event occurs in a given amount of time. It is commonly used to describe the rate at which waves oscillate or vibrate. The unit of frequency is hertz (Hz), which represents the number of cycles or oscillations per second.

For example, in the case of sound waves, frequency is related to the pitch of the sound. Higher frequency sound waves have a higher pitch, while lower frequency sound waves have a lower pitch. Similarly, in the case of electromagnetic waves such as light, frequency is related to the color of the light. Higher frequency electromagnetic waves correspond to colors such as blue and violet, while lower frequency electromagnetic waves correspond to colors such as red and orange.

The relationship between frequency, wavelength, and the speed of the wave is given by the formula:

frequency = speed of the wave / wavelength

This formula shows that the frequency of a wave is inversely proportional to its wavelength, assuming the speed of the wave remains constant. In other words, as the wavelength of a wave increases, its frequency decreases, and vice versa.

Frequency is an important concept in many fields, including physics, engineering, and communications. It is used to describe and analyze a wide range of phenomena, from the behavior of sound and light waves to the performance of electronic circuits and systems.

Here in the Question,

When a tuning fork is struck against a table, it vibrates at its natural frequency, which is determined by its physical properties such as its mass, shape, and material. The vibration of the tuning fork creates sound waves that travel through the air, and our ears perceive these waves as sound.

The frequency of the sound that we hear depends on the frequency of the sound waves that reach our ears. When the sound waves from the tuning fork travel through the air, they undergo a phenomenon called the Doppler effect, which causes the frequency of the sound waves to change depending on the relative motion between the source of the sound waves (the tuning fork) and the observer (our ears).

If the tuning fork is stuck against a table and is not moving relative to the observer, the frequency of the sound waves that reach our ears will be the same as the natural frequency of the tuning fork, which is given as 300 Hz in this case.

Therefore, the frequency that you will hear when the tuning fork is stuck against a table is 300 Hz.

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The maximum height reached by the brick above the ground is 20 ft. The time taken by the brick to reach the ground is 0 seconds. Free-fall motion (uniformly accelerated motion) after falling from a height of 20 feet. Further, the acceleration experienced by the free brick is equal to the acceleration due to gravity which is approximately 32ft/sec², downward.

Hence, we can write its acceleration as, a = g = 32ft/sec².

Here, u = 0 as the brick was not moving initially while it was at rest on the top of the load of bricks.

Now, the value of v(t) can be obtained by integrating the above expression w.r.t. time as shown below:v(t) = u + a.t = 0 + 32t = 32t ...(1)

The value of x(t) can be obtained by integrating the expression for v(t) w.r.t. time, i.e. t as shown below :x(t) = (1/2).a.t² + u.t + x₀ = (1/2).32t² + 0 + 20ft = 16t² + 20ft ...(2)

Here, x₀ = 20ft is the initial displacement of the brick above the ground.

Now, we can answer the questions as follows:

(a) Using  the following relation: v = u + a.t = 0 when the brick is at its highest point.

Hence, the time taken to reach this point can be obtained as follows:0 = u + a.t ⇒ t = (-u/a) = (0/32) sec = 0 secThis means that the brick reaches its maximum height at t = 0 sec, which is the initial moment.

Thus, the maximum height reached by the brick above the ground is, x(0) = 16.0² + 20 = 20 ft

(b) The time taken by the brick to reach the ground can be obtained by using the following relation: x(t) = 0.

Here, we are interested in finding the value of t.

Hence, we can substitute x(t) from equation (2) above and equate it to 0 to obtain the value of t as shown below:16t² + 20 = 0 ⇒ t² = -(20/16) sec².

This means that the brick doesn't take any finite time to reach the ground from its maximum height.

This is because it falls vertically downwards from a height of 20 ft under the action of gravity.

Thus, it reaches the ground at t = 0 sec only.

(c) The speed of the brick just before it hits the ground can be obtained by using the expression for v(t) from equation (1) above and substituting t = 0 sec (just before it hits the ground) as shown below:

v(0) = 32(0) = 0 ft/sec.

Hence, the speed of the brick just before it hits the ground is 0 ft/sec.

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Because the mass is constant, if the velocity is increased, the kinetic energy must also increase.

Total mass of the IBM initials written with 35 xenon atoms is approximately 7.63 × 10⁻⁻²¹ grams.

The atomic mass of xenon (Xe) is 131.29 atomic mass units (amu). To convert this to grams, we need to use the conversion factor between atomic mass units and grams, which is 1 amu = 1.6605 × 10⁻²⁴ gm.

Therefore, the mass of one xenon atom in grams is:

131.29 amu × 1.6605 × 10⁻²⁴ gm/amu = 2.18 × 10⁻²² gm

So, the total mass of 35 xenon atoms in grams is:

= 35 × 2.18 × 10⁻²² g

= 7.63 × 10⁻⁻²¹gm

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--The given question is incomplete, the complete question is:

"Using scanning tunneling microscopy, scientists at IBM wrote the initials of their company with 35 individual xenon atoms (as shown below). Calculate the total mass of these letters in grams, if the atomic mass of xenon (Xe) is 131.29 amu"--

Answer:2.01201

Explanation:

The given instructions describe the process of checking the brake system of a tractor-trailer by releasing the trailer emergency brake while leaving the tractor parking brake out and gently pulling against the brakes in low gear.

Step 1:

The given instructions describe the process of checking the brake system of a tractor-trailer.

Step 2:

To perform the brake system check, the first step is to ensure that the air pressure is at a normal level. This ensures that the brakes will operate properly. Next, the trailer emergency brake is released, allowing the trailer brakes to be engaged. However, the tractor parking brake is left out, allowing the tractor to move. By pulling gently against the brakes in low gear, any abnormalities or malfunctions in the brake system can be identified. If there are any issues, such as dragging brakes or uneven braking, they can be addressed and repaired to ensure safe operation of the tractor-trailer.

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Most of the constellations we are familiar with were first charted by ancient Europeans and Middle Easterners. These cultures, particularly the Greeks, Romans, and Babylonians, developed the system of mapping stars into patterns and assigning them names and stories. They believed that the patterns in the stars represented gods, heroes, and creatures from their mythologies.

The International Astronomical Union, on the other hand, is a modern organization that has established guidelines for naming and identifying celestial bodies and features, including constellations. Ancient Chinese and Mayan astronomers also made significant contributions to the study of the stars, but their constellations were different from those recognized by European and Middle Eastern cultures. Overall, the rich history of cultural interpretations of the stars has influenced the way we view the night sky today.
Most of the constellations we're familiar with were first charted by B. Ancient Europeans and Middle Easterners. These early civilizations created star charts and identified patterns in the sky that we still recognize today. The International Astronomical Union

(A) later standardized the names and boundaries of constellations, but the origins can be traced back to ancient Europe and the Middle East.

( B) astronomers in ancient China

(C) and ancient Mayan astronomers

(D) also made significant contributions to the study of stars, the constellations most familiar to us come from the work of Ancient Europeans and Middle Easterners.

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Answer:

d. ice

Explanation:

Answer:

The correct answer is C. Ice, you know, since it's so slippery. lol

pls give brainliest

One significant method for assessing body fat distribution is measurement of waist circumference.

Waist circumference is a widely used method for assessing body fat distribution and is an important indicator of central obesity. It involves measuring the circumference of the waist at a specific anatomical landmark, typically at the level of the narrowest point between the ribs and the iliac crest.

The measurement of waist circumference provides valuable information about the distribution of body fat. Excess fat accumulation in the abdominal region, also known as central obesity or android obesity, is associated with a higher risk of various health conditions, including cardiovascular diseases, type 2 diabetes, and metabolic syndrome.

By measuring waist circumference, healthcare professionals can evaluate an individual's body fat distribution and assess their risk for developing obesity-related health problems.

The measurement of waist circumference is relatively simple and non-invasive, making it a practical method for assessing body fat distribution in clinical and research settings. It is often used in conjunction with other anthropometric measurements, such as body mass index (BMI), to provide a comprehensive evaluation of an individual's body composition and health status.

Regular monitoring of waist circumference can help track changes in body fat distribution over time and guide interventions aimed at reducing central obesity and improving overall health.

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Answer:

Blue light has the shortest wavelength  λ = c / f

Since E = h f = h c / λ         the energy of a photon

Blue light has the most energy in the visible spectrun.

A photon of blue light carries the most energy in the visible light spectrum, according to Planck's equation relating energy to frequency.

In the spectrum of visible light, a photon of blue light carries the most energy. The energy carried by a photon is related to its wavelength and frequency. Shorter wavelength light (blue) has higher frequency and therefore, carries more energy than longer wavelength light (such as red, orange, yellow). This is in accordance with the Planck's equation: E = hν where E is energy, h is Planck's constant and ν is frequency of light.

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Answer:

c

Explanation:

cuz its informing the length of 5 and weight on 20N

Answer:I can't see the question

Explanation:so i dont konw

Answer:

b. oval

Explanation:

A galaxy is usually defined as a system that is comprised of infinite stars, planets, solar systems, interstellar gases, and dust particles. It is extremely large and covers a large portion in space. For example, the milky way galaxy is comprised of the solar system, the sun and the earth, and where life exists.

These galaxies are often characterized by a particular type of shape. This includes-

(1) Spiral type of galaxy

(2) Elliptical type

(3) Irregular type

(4) Spiral barred type

There is no oval type of galaxy discovered so far. So, it cannot be considered as a galaxy.

Thus, the correct answer is option (B).

Your answer is B. Oval

Besides arson, the charge that Kai is most likely to face when investigators track him down for starting the fire is murder.

Murder is the killing of another person without justification or lawful excuse. Murder is a crime that is taken very seriously, and it is considered one of the most severe criminal offences. Kai would be accused of murder because he started the fire that resulted in someone's death.

This death resulted from the action he undertook, which was his deliberate act of starting the fire. In this context, it is a criminal offence to act recklessly or to the extent of causing harm to another individual who is not aware of the action being taken by the other person.

What is the definition of murder, Murder is a type of homicide, which means the killing of a human being by another human being. It is the unlawful killing of one person by another without justification or lawful excuse. Murder can be categorized into first-degree murder, second-degree murder, or third-degree murder. It is always considered one of the most severe criminal offences.

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False

The Pressure Gradient Force (PGF) is the force that drives air from areas of high pressure to areas of low pressure. In both a trough and a ridge, the PGF is the same.

However, the winds will not be the same in both features.  

In a trough, the winds tend to move towards the center of the trough, where the air is rising, and this causes convergence and lifting. This upward motion causes a decrease in pressure, leading to a steeper pressure gradient, which means stronger winds. On the other hand, in a ridge, the winds move away from the center of the ridge, where the air is sinking, and this causes divergence and sinking. This sinking motion causes an increase in pressure, leading to a weaker pressure gradient and lighter winds.  

Therefore, assuming the same PGF, the trough will have the faster winds compared to the ridge.

Answer:

Explanation:

The area of the floor covered by his both feet can be found by using the formula

\(a = \frac{f}{p} \\ \)

f is the force

p is the pressure

From the question we have

\(a = \frac{400}{400} = 1 \\ \)

We have the final answer as

Hope this helps you

Answer:

F = Q v B       where Q is negative (electron motion)

v will be directed from Plus to Minus (conventional current)

F = Q (v X B)      vector notation

v will be positive in northerly direction (plus charges in direction of current)

v X B   will be directed towards the "West"

Since Q lis negative the net force is  directed to the "East"

As a check one can use the "Left Hand Rule":

First finger in direction of field  "Down"

Second finger in direction of positive charges "North"

Thumb (force) will be west and since the charge is negative the net force is towards the "East"

Answer:

It is estimated that the light sources used as transmitters in the light-wave com munication system in Chicago have the ability to transmit more than 650 voice signals simultaneously.  

Explanation:

By the half-life of radioactive, the decay constant is 0.144 /s.

We need to know about the half-life of the radioactive elements to solve this problem. The radioactive element will decay over time and follow the equation

N = No(1/2)^(t/t'')

λ = ln2 / t''

where N is the final quantity, No is the initial quantity, λ is the decaying constant, t is time and t'' is the half-life of a radioactive element.

From the question above, we know that

t = 18.3 s

No = 175 kbq

N = 12.4 kbq

Calculate the half-life

N = No(1/2)^(t/t'')

12.4 = 175(1/2)^(18.3/t'')

(1/2)^(18.3/t'') = 62/875

18.3/t'' = ⁰'⁵log(62/875)

18.3/t'' = 3.82

t'' = 4.79 seconds

Determine the decay constant

λ = ln2 / t''

λ = ln2 / 4.79

λ = 0.144 /s

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Answer:

an equation is balanced when the same number of each element is represented on the reactant and product sides. equations must be balanced to accurately reflect the law of conservation of matter.

Answer:

Explanation:

The velocity of the car can be found by using the formula

\(v = \frac{d}{t} \\ \)

d is the distance

t is the time taken

From the question we have

\(v = \frac{400}{16} \\ \)

We have the final answer as

Hope this helps you

Answer:

We cannot hear all sounds because our ears can only pick up a certain range

Answer:

A because when you accelerate you move even faster

Answer:

I need a picture dude or something more specific than the other kids were white gold and blue

Explanation:

force(f)=250N

acceleration(a)=5m/sec²

mass(m)=?

now,

f=m.a

f=m

a

m=250

5

m=50kg

i hope so,

The resultant of the two given vectors is 346.4 units.

The resultant of the three vectors is the sum of all the three vectors acting together. The resultant vector is the single vector that will represent all the three vectors in terms of magnitude and direction.

The sum of the vectors in x-direction;

Vx = V cosθ

where;

for 200 units, θ = 0⁰ (above the horizontal)

for 400 units, θ = 60⁰ (above the horizontal)

Vx = 200 cos(0) - 400 cos(60)

Vx = 0

The sum of the vectors in y-direction;

Vy = 200 sin(0) + 400 sin(60)

Vy = 346.4 units

The resultant vector is calculated as;

V = √(Vx² + Vy²)

V = √(0² + 346.4²)

V = 346.4 units

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Answer:

Sound can't travel in a vaccum.

Explanation:

Sound waves need a medium in order to travel (e.g. air, water, glass)

Since there was a vaccum between the glass the sound couldn't travel since vaccum's contain a very small amount of atoms.

An alternate power source can be mechanically driven by some form of prime mover(s) equipped with fully engaged locks to ensure stable and reliable power generation. This type of power source is commonly used in healthcare facilities,

     particularly in patient care vicinities where uninterrupted power is critical for patient safety and wellbeing. Prime movers such as diesel generators, gas turbines, and fuel cells can be used to drive alternators and produce electrical power. These prime movers are typically connected to a transmission system that includes a control panel, switchgear, and distribution panels to regulate and distribute power to the facility. In the event of a power outage or interruption from the main power grid, the alternate power source can kick in and provide power to essential equipment and systems until the main power source is restored. Overall, an alternate power source is an essential component of any healthcare facility's emergency preparedness plan and can ensure patient safety and wellbeing during critical situations.

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