if an atom has 7 protons and 8 electrons, then it has an electric charge of?

Answer: 72

Explanation: just cuz

According to Newton's laws, the ball is subject to equal forces directed in opposite directions.

A collision is when an object collides with another object. Collisions are described by the law of conservation of linear momentum, which states that momentum is neither created nor destroyed. Collision (also called impact), in physics, is the sudden and violent collision of two bodies in direct contact. B. Two billiard balls, a golf club and a ball, a hammer and a nail head, his two trains linked together, or a falling object and the floor. The question cannot be fully answered because the question is incomplete. However, according to Newton's laws, the ball is subject to equal forces directed in opposite directions.

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Define east as the negative direction and west as the positive direction. The false statement is:

a) If a car is traveling east, its acceleration must be eastward.

Acceleration is a change in speed per unit time. This acceleration is a vector quantity that has both magnitude and direction.

Acceleration is also divided into decelerated acceleration and accelerated acceleration.

Acceleration is decelerated which means that the direction of acceleration is opposite to the direction of velocity.

Meanwhile, the acceleration is accelerated, which means the acceleration is in the same direction as the speed.

Acceleration will be negative if the speed of an object can decrease within a certain time interval.

While the acceleration which is positive will increase over a certain time interval.

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The statement: A large change in entropy for the hydrolysis reaction, doesn't represent a possible explanation for the large negative Gibbs free energy for ATP hydrolysis.

The negative value of free energy change is caused by electrostatic repulsions in the reactant.
The forward reaction's low activation energy is an exception among the given options that do not contribute to the large, negative free energy change.
Product resonance forms improve system stability. As a result, the change in free energy becomes more negative.

Ionization stabilises the products formed by the hydrolysis of high-energy compounds. As a result, free energy change becomes more negative.
Solvation reactions improve the product's stability. As a result, this contributes to a large negative free energy change.

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It takes the moon about a month to orbit the Earth. We would experience two eclipses each month if the moon's orbit was in the same plane as the ecliptic, which is Earth's orbital plane. Thus, option C is correct.

At every full moon, the moon would be eclipsed. About a week later, there would be a solar eclipse with the new moon as well, bringing the yearly total of eclipses to at least 24.

But it doesn't, and the reason is that by around 5 degrees, the moon's orbit around Earth is inclined to that of the Earth around the sun.

Doesn't the fact that a new moon happens when the moon is between the earth and the sun also imply that a solar eclipse will occur somewhere on Earth.

Therefore, The orbital plane of the Moon is tilted slightly (by about 5 degrees) to the ecliptic plane.

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The given question is incomplete. The complete question is given below:

All the following statements are true. Which one explains the reason that there is not a solar eclipse at every new moon?

A.) The Moon is only about 1/4 as large as Earth in diameter.

B.) The Moon goes through a complete cycle of phases about every 29 1/2 days.

C.) The orbital plane of the Moon is tilted slightly (by about 5 degrees) to the ecliptic plane.

D.) The nodes of the moon's orbit precess with an 18-year period.

It takes the moon about a month to orbit the Earth. We would experience two eclipses each month if the moon's orbit was in the same plane as the ecliptic, which is Earth's orbital plane. Thus, option C is correct.

At every full moon, the moon would be eclipsed. About a week later, there would be a solar eclipse with the new moon as well, bringing the yearly total of eclipses to at least 24.

But it doesn't, and the reason is that by around 5 degrees, the moon's orbit around Earth is inclined to that of the Earth around the sun.

Doesn't the fact that a new moon happens when the moon is between the earth and the sun also imply that a solar eclipse will occur somewhere on Earth.

Therefore, The orbital plane of the Moon is tilted slightly (by about 5 degrees) to the ecliptic plane.

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The given question is incomplete. The complete question is given below:

All the following statements are true. Which one explains the reason that there is not a solar eclipse at every new moon?

A.) The Moon is only about 1/4 as large as Earth in diameter.

B.) The Moon goes through a complete cycle of phases about every 29 1/2 days.

C.) The orbital plane of the Moon is tilted slightly (by about 5 degrees) to the ecliptic plane.

D.) The nodes of the moon's orbit precess with an 18-year period.

You will hear two taps when your friend taps the fence​ because the sound wave created by tap travels through the fence and into the air. When the sound wave reaches your ear, then you will hear the first tap.

When your friend taps the fence, you will hear two taps because the sound wave created by the tap travels through fence and into the air. When sound wave reaches your ear, you will hear the first tap.

The sound wave then continues to travel through fence and reflects back towards your ear, creating second tap. This is known as echo. The time between the two taps depends on distance the sound wave has to travel, density of the fence material, and other factors that can affect speed and reflection of the sound wave.

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Work done to stretch the string is 0.039 J.

Given F = [tex]kx - bx^{2} +cx^{3}[/tex]

Where, k = 100 N/m

            b = 700 N/m^2

            c = 12000 N/m^3

We know that , W = Fx

where, F = force and x = displacement

Taking integrals on both sides we get:

W = [tex]\int\ {F} \, dx[/tex]

W = [tex]\int\ {kx - bx^{2} + cx^{3} } \, dx[/tex]

Integrating under proper limits we get:

W = [tex]\frac{kx^{2}}{2} - \frac{bx^{3}}{3} +\frac{cx^{4}}{4}[/tex]

Given x = 0.05 m

Putting these values in above equation we get:

W = 0.39 J

Work is the product of the component of the force in the direction of the displacement and the magnitude of this displacement.

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Earth carries a net charge of about -5×10−5 C. 10 and many more electrons are there than protons on Earth.

What is electron?

It is possible for an atom to have an attached or detached electron, a negatively charged subatomic particle (not bound). The electron, along with protons and neutrons, is one of the three main particle types found inside an atom. Atomic nuclei are composed of protons, neutrons, and electrons.

What is proton?

In the nucleus of every atom, there is a proton, a subatomic particle. Though going in the opposite direction from the electron, the particle has a positive electrical charge. The mass of an isolated proton, which is almost equal to that of a neutron, is just 1.673 x 1027 kg.

Therefore, earth carries a net charge of about -5×10−5 C. 10 and many more electrons are there than protons on Earth.

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A wind vane and an anemometer are both instruments used to measure wind speed and direction.

A wind vane measures wind direction by pointing in the direction from which the wind is coming. It typically consists of a lightweight vane attached to a pivot that rotates to align with the wind direction. The wind vane can provide information about the general trend of wind direction but does not provide information about wind speed.

An anemometer, on the other hand, measures wind speed. There are several types of anemometers, but the most common type consists of four cups or vanes attached to a central rotating shaft. As the wind blows, it turns the cups or vanes, and the speed at which they rotate is proportional to the wind speed. The speed can then be measured using an attached mechanism, such as a dial or digital readout.

Meteorologists use the information provided by wind vanes and anemometers to understand the patterns and behavior of wind in a given location. Wind direction and speed are important factors in weather forecasting and the study of atmospheric processes.

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The phrase "36a/a" can be written as 36. Consequently, vout/vs = 36. The number 36 is the same as "36a/a". This is so that the phrase becomes 36 * 1, which is equal to 36, since dividing a number by itself

While Vs (Supply voltage) refers to the voltage source supplied to the device or system, Vout (Output voltage) refers to the voltage existing at the output terminals of a device or system. Gain, which is a measurement of how much the output voltage has been amplified or raised in comparison to the input voltage, is the ratio of Vout to Vs. Typically, the gain in electrical circuits is given in decibels (dB). The device's internal components, like as resistors and transistors, may be changed to create the required output voltage for a specific input voltage, which is how the gain is regulated.

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The minimum amount of time taken by the receiver jet to catch up with the tanker jet is 100 seconds, rounded to the nearest second.

Let's assume that the receiver jet accelerates at the maximum rate (1.05g) until it reaches the same speed as the tanker jet, and then coasts for the rest of the journey.

The time taken for the receiver jet to reach the same speed as the tanker jet can be calculated using the following formula:

t = v / a

where

v = final speed - initial speed

a = acceleration (1.05g)

The initial speed of the receiver jet is 360 km/hr = 100 m/s. The final speed is the same as the tanker jet, which is 360 km/hr = 100 m/s.

So, v = 100 m/s - 100 m/s = 0

a = 1.05 * 9.8 m/s^2 = 10.29 m/s^2

t = v / a = 0 / 10.29 m/s^2 = 0 s

Since the receiver jet reached the same speed as the tanker jet in zero seconds, it will continue to fly at a constant speed of 100 m/s for the rest of the journey. The distance that the receiver jet needs to cover can be calculated as follows:

d = v * t

where

v = 100 m/s (speed of the receiver jet)

t = time taken to cover the distance (to be calculated)

Since the tanker jet was initially 10 km ahead of the receiver jet, the distance that the receiver jet needs to cover is 10 km = 10,000 m.

t = d / v = 10,000 m / 100 m/s = 100 s

So, the minimum amount of time taken by the receiver jet to catch up with the tanker jet is 100 seconds, rounded to the nearest second.

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The term "psychophysics" was coined by German psychologist and philosopher Gustav Fechner in the mid-19th century.

He introduced the concept in the mid-19th century as a way to quantify and study the relationship between physical stimuli and their psychological effects. Fechner is considered to be the founder of psychophysics, and his work laid the foundation for the development of this field of study. Psychophysics aims to understand the perception of stimuli and how it is related to the physical properties of the stimuli, such as their intensity, duration, and frequency. Psychophysics is a subfield of psychology that deals with the relationship between physical stimuli and their psychological effects. It aims to quantify the relationship between the physical properties of stimuli, such as intensity, duration, and frequency, and the subjective experiences of those stimuli, such as sensation, perception, and response.

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The statement "they can cross each other" is not a property of electric field lines.

Electric field lines are a graphical representation of the electric field. They are used to visualize the electric field and to understand the behavior of electric charges. Electric field lines originate from positive charges and end on negative charges, representing the direction of the electric field. The electric field is strongest where the lines are closest, meaning that the electric field is stronger in regions where the lines are packed tightly together. This is because the electric field is proportional to the number of lines per unit area. However, electric field lines cannot cross each other. This is because the electric field must always be a continuous and well-defined quantity, and if the lines cross each other, it would be ambiguous as to the direction of the electric field in that region.

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if a 3- ø, delta-connected system has a line-to-line voltage of 637sin(377t) v, then the phase voltage (rms) would be:

The phase voltage (rms) would be:450V

For delta connected system line voltage= phase voltage

     VL=VP

VL= 637 sin(377 t)

Vl=Vp=637V

Vrms=Vphm/[tex]\sqrt{2}[/tex]

       = 637/[tex]\sqrt{2}[/tex]

       =450 V

A three-phase source or load's phase voltage is the voltage measured across a single component. The current flowing through one line between a three-phase source and load is referred to as line current. The current flowing through any one part of a three-phase source or load is known as phase current.

In a three-phase circuit, line voltage is the difference in voltage between any two lines. A three-phase source or load's phase voltage is the voltage measured across a single component. The current flowing through one line between a three-phase source and load is referred to as line current.

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The required charge on the capacitor obtained is 5 x 10^-4C when a 20 kN2 resistor is connected in series with an initially uncharged 100 uF capacitor and a 5 V battery.

Given the resistance of resistor (R) = 20kN^2

The capacitance of uncharged capacitor (C) = 100uF

The voltage of battery (V) = 5V

Let the charge on the capacitor = q

We are aware that a capacitor will not pass current in steady state and will instead behave like an open circuit.

We know that from Ohms law the charge on the required capacitor is calculated as: q = CV

Then, q = 100 x 10^-6 x 5

q = 5 x 10^-4C

Hence the required charge on the capacitor obtained is 5 x 10^-4C

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Option E. The direction of the electric field at the dot in the diagram is "None of the above." Electric field lines are used to represent the direction of the electric field and the magnitude of the field is proportional to the density of the lines.

The diagram you provided does not have enough information to determine the direction of the electric field at the dot, as the electric field lines have not been shown. In order to determine the direction of the electric field at a point, you would need a complete representation of the electric field in the region, including the electric field lines and any charges that are causing the field.  the electric field is a field that describes the force experienced by a charged particle due to the presence of other charged particles or electric charges. The electric field is represented by electric field lines, which are lines that show the direction of the electric field at any given point.

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What is the direction of the electric field at the dot?

a. A

b. B

c. C

d. D

e. None of the above

"Executive" is the step in the IPDE process you are using to accelerate to avoid a collision. The IPDE process contains four steps.

IPDE process is an approach stand for Identify, Predict, Decide, and Execute. To deal with potential and real hazards while driving, we employ the IPDE approach. The IPDE process contains four steps, those are:

1. Identify

Identify means that a driver must look ahead and locate a hazard (such as traffic lights or children) and pay close attention to them. Which is why car's windows must be clean.

2. Predict

Predict is when a driver foresees where points of conflict can develop in a driving situation. A driver must predict what will happen if he comes across a real or potential hazard.

3. Decide

A driver must decide exactly what they will do to drive safely and avoid the hazards. This involves carefully planning the actions and ensuring that the path is clear to proceed.

4. Execute

Execute is when you accelerate to avoid a collision. The decision is carried out by a driver.

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a) The car with the dead battery is the one that has its battery being charged by the other car.

b) The amount of energy transferred to the dead battery can be calculated as follows:

Energy = Voltage * Current * Time

Since the current is 30A and the time is 1 minute (60 seconds), the energy transferred can be calculated as:

Energy = Voltage * 30A * 60s = Voltage * 1800 C

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The direction of the courts in recent years has been towards expanding and strengthening the rights of the accused, while also ensuring that justice is served and the rights of victims are protected.

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The direction of the additional electric field generated by the charge imbalance in a rod will depend on the direction of the charge movement.

If the charge movement results in a positive charge buildup on one side of the rod, the additional electric field will point in the opposite direction, opposing the initial applied field. If the charge movement results in a negative charge buildup on one side of the rod, the additional electric field will point in the same direction, enhancing the initial applied field. Understanding these basic principles is important for advancing in the field of electromagnetism and for understanding the behavior of charged particles in various electrical and electronic systems.

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q would need to be 3.26 x 10^-7 Coulombs to make the magnitude of the electric field 0.00562 meters away from the surface equal to 5.85 n/C.

The magnitude of the electric field at a point near a flat charged surface is given by:

E = Q / (4 * pi * epsilon_0 * A)

where E is the electric field magnitude, Q is the charge, epsilon_0 is the vacuum permittivity, A is the area of the charged surface, and d is the distance from the surface.

We can rearrange the equation to solve for Q:

Q = E * (4 * pi * epsilon_0 * A)

Plugging in the given values:

Q = 5.85 nC * (4 * pi * 8.85 x 10^-12 C^2/N m^2 * 8.43 m^2)

Q = 3.26 x 10^-7 C

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A) No velocity direction is provided.
B) The mph unit of measurement is invalid.

Explained: Because velocity is a vector quantity, it has both a magnitude and a direction. The statement "The velocity of an item can be represented as v = 14 mph" is untrue since it only expresses the magnitude and not the direction of the velocity.

Additionally, velocity cannot be measured using the unit mph (miles per hour). Typically, the units used to express velocity are metres per second (m/s), kilometres per hour (km/h), or feet per second (ft/s). The common unit for velocity in physics and engineering is typically metres per second (m/s).

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About 93 million miles (150 million kilometers) separate Earth and the sun. Astronomers and astrophysicists use this distance, known as an astronomical unit (AU), as a standard unit of measurement.

As a result, we can observe from the previous explanation that there are 149.6 million kilometers between the earth and the sun. To determine the distance between the earth and the sun, use this astronomical approach.

If you use standard measurements like feet or miles, it is nearly impossible to visualize the immensity of our solar system. 100 million kilometres (149 million kilometers) separate Earth from the Sun, whereas the distance to the Sun .

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The energy stretching vibration transition per molecule is   [tex]1.15 * 10^{-20} J[/tex]

Plank's constant (h) and the frequency of the transition are multiplied to get the energy of the stretching vibration transition per molecule (f). As a result, each formaldehyde molecule's energy for the C-O stretching vibration transition is equivalent to:

Energy = h * f

         [tex]= 6.626 *10^{-34} J * s * 1750cm^{-1} \\\\= 1.15 *10^{-20} J[/tex]

Therefore ,Each molecule's energy-stretching vibration transition is[tex]1.15 * 10^{-20 }J[/tex]

Raman is a great method for these kinds of compounds since the stretching vibrations of these groups are characterised by strong Raman bands. The IR absorptions' intensity might vary. Variable IR intensities are the result of the double bond stretching vibrations. Between 1680 and 1600 cm-1 are where the majority of olefin Cdouble bondC stretching bands are found.

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Considering how enticing both charges are. Only when applied over very small distances and at the level of subatomic particles do the weak and strong forces take control.

A clear meaning is attached to the word "force." The terms "push" and "pull" are perfectly acceptable at this level to describe forces. An object does not contain any force inside of it either within it. Other element applies pressure to the first.

A push or pull constitutes a force. The motion of an item can occasionally be changed by forces, which also generate motion. Every object is drawn toward the center of the Earth by gravity, for instance.

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The vector sum of all forces exerted on an object is the net force. A force is a vector and that two forces of equal magnitude and opposite direction will cancel each other out, the net force is the sum of all the forces.

The vector sum of all forces exerted on an object is the net force. The net force exerted on an object is zero when it is in equilibrium (at rest or moving at a constant velocity). If all of a vector's components are zero, it can only have a magnitude of zero.

The acceleration of the object will be greater the greater the net force acting on it. These connections are summarized by Newton's second law of motion. Rewriting the above acceleration equation to account for net force yields the following solution: Mass times acceleration equals net force, or F = m/a.

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A) It will take 1.53 seconds does it take her to reach a speed of 2.00 m/s.

B) If she then brakes to a stop in 0.8 second, her (constant) deceleration is -2.5 m/s^2.

Acceleration:

Acceleration is a vector because it must be specified as magnitude along with direction. One-dimensional motion uses negative and positive signs to indicate direction. So if the sign is negative, the object is slowing down.

Deceleration:

Deceleration is the opposite of acceleration. Deceleration is calculated by dividing the final velocity minus the initial velocity by the time it takes for this velocity to drop. Here the acceleration formula can be used with a negative sign to determine the deceleration value.

(A) Here the car's initial velocity (u) is 0 m/s as it is at rest and the final velocity (v) is 2 m/s. The acceleration (a) of the car is 1.30 m/s^2. Use the first equation of motion to get the time taken (t).

    v = u + at

⇒ 2m/s = 0 m/s + (1.30m/s²) t

⇒  t = [tex]\frac{2m/s}{1.30m/s^2}[/tex]

⇒ t = 1.53 second

(B) For this the car's initial velocity (u) is 2 m/s as it is in motion and the final velocity (v) is 0 m/s. The time taken (t) to reach the final velocity is 0.8 s. Use the first equation of motion to get acceleration (a).

    v = u + at

⇒ 0 m/s = 2 m/s + a(0.8s)

⇒ a = [tex]\frac{(0-2)m/s}{0.8s}[/tex]

⇒ a = -2.5 m/s²

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The speed of the slower train is 40 mph and the speed of the faster train is 50 mph.

Let's call the speed of the slower train x mph. Then, the speed of the faster train is x + 10 mph. The distance traveled by each train in 5 hours can be calculated using the equation: d = rt, where d is the distance, r is the speed, and t is the time.

The total distance between the two trains after 5 hours is 1020 - 170 = 850 mi. So, the distance traveled by the slower train is x * 5 and the distance traveled by the faster train is (x + 10) * 5.

Therefore, we can set up the equation:

Solving for x, we find that x = 40 mph.

Therefore, the speed of the slower train is 40 mph and the speed of the faster train is 50 mph.

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The required voltage while a static discharge dissipates certain amount of energy is calculated to be 142.85 V.

The voltage is also defined as the ratio or the fraction of the energy measured in joules to the per-unit charge measured in Coulomb.

The energy is given as 1× 10⁻³ J.

The charge q is given as q = 7 µc = 7× 10⁻⁶ c

The expression for energy is given as,

E = q v

where, E is energy

v is voltage

q is charge

Making v as subject, we have,

v = E/q = (1× 10⁻³)/(7× 10⁻⁶) = 1000/7 = 142.85 V

Thus, the voltage in volts is calculated as 142.85 V.

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The entropy of steam at 45 degrees celsius is [tex]6.744 kj/kgK.[/tex]

This can be calculated from the steam tables, which contain the thermodynamic properties of steam at various pressures and temperatures. It is a thermodynamic property that describes the amount of energy that is unavailable to do work. The entropy is calculated from the enthalpy and temperature of the steam. In this case, the enthalpy of 2100 kJ/kg and the temper

ature of 45 degrees celsius are used to calculate the entropy. The equation used to calculate the entropy is:

[tex]S =\frac{ H}{T}[/tex]

Where S is the entropy, H is the enthalpy and T is the temperature.

Therefore,

[tex]S = \frac{2100}{45}\\ \\ = 46.67 kJ/kgK.[/tex]

Therefore, the entropy of steam at 45 degrees celsius is [tex]6.744 kJ/kgK[/tex]

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complete question:IF the enthalpy of steam at 45 degrees celsius is 2100 kj/kg, what is its entropy in  kj/kgK