a sphere has a net charge of -4.8 x 10-17 c. how many excess electrons are there on the sphere?

25 degrees Celsius is 298 Kelvin

What is temperature?

Temperature is a unit used to represent hotness or coolness on any of a number of scales, including Fahrenheit and Celsius. According to temperature, heat energy will naturally move from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).

The kelvin is the fundamental unit of temperature in the International System of Units (SI). Its identifier is K. The Celsius scale, in which 0 degrees corresponds approximately to the freezing point of water and 100 degrees to its boiling point at sea level, is frequently practical for use in common applications.

The formula is °C + 273.15 = K.

So, reading on a Kelvin scale is 25∘C + 273 = 298K.

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Answer:

-11.67 m/s.

Explanation:

The velocity of the second piece can be determined by the law of conservation of momentum, which states that the total momentum of a closed system remains constant.

Let's call the velocity of the second piece "v".

Before the explosion, the total momentum of the comet is 0 (since it is at rest). After the explosion, the total momentum of the two pieces is

(35,000 kg)(5 m/s) + (15,000 kg)(v).

Using the law of conservation of momentum, we can set these two momenta equal to each other and solve for v:

0 = (35,000 kg)(5 m/s) + (15,000 kg)(v)

0 = 175,000 kg m/s + 15,000 kg v

-175,000 kg m/s = 15,000 kg v

v = -11.67 m/s

So the velocity of the second piece is -11.67 m/s.

The force that each figure can pull is determined by various parameters, including the weight and strength of the figurines, the length and tension of the rope, and the location of each figure. Experiments or computations based on applicable physics concepts and equations would be required to ascertain the precise measurement of force.

A force is an effect in physics that may modify the velocity of an item. A force can cause a mass item to change its velocity, or accelerate. Intuitively, force may be characterized as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Here,

The force that each figure can pull is determined by various parameters, including the figurines' weight and strength, the length and tension of the rope, and the location of each figure. Experiments or computations employing appropriate physics concepts and equations would be required to ascertain the precise measurement of force.

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The required value of electric field between the plates of the capacitor which contain a specified charge is calculated to be 30 × 10³ V/m.

The value of capacitance is given as,

C = 0.8 μ F = 0.8 × 10⁻⁶ F

The following is the value of the space between the plates:

d = 3 mm = 3 × 10⁻³ m

The value of the charge is:

Q = 72 μc = 72 × 10⁻⁶ c

The value of the potential difference is: Q = C V

Making V as subject,

V = Q/C = (72 × 10⁻⁶)/(0.8 × 10⁻⁶) = 90 V

Substitute all the values in the potential difference calculation, then simplify it to account for the electric field.

90 = E × 3 × 10⁻³

E = 90/(3 × 10⁻³) = 30 × 10³ V/m

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Answer:

Estimator variables are those that cannot be controlled by the criminal justice system. They include simple factors like the lighting when the crime took place or the distance from which the witness saw the perpetrator.

Explanation:

The total displacement of the car is the sum of the displacement during acceleration and deceleration, which is 155.44 - 254.24 = -98.8 m. So, the car moves backwards 98.8 m during the entire motion.

The total displacement of the car can be calculated as follows:

The car accelerates from rest to 25.4 m/s with an acceleration of 4.51 m/s2. The time taken to reach this speed can be calculated as t = v / a = 25.4 / 4.51 = 5.6 s

During the time t, the car travels a distance x = 0.5at^2 + v_0t, where v_0 is the initial velocity, which is zero.

The distance covered during acceleration is x = 0.5 * 4.51 * 5.6^2 = 155.44 m

The car then slows down with an acceleration of -2.34 m/s2. The time taken to slow down from 25.4 m/s to 0 m/s can be calculated as t = v / a = 25.4 / 2.34 = 10.8 s

During this time, the car travels a distance x = 0.5at^2 + v_0t = 0.5 * -2.34 * 10.8^2 + 25.4 * 10.8 = -254.24 m

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During the third-meter portion of compression least work was done on the spring.

Work is a measure of the energy transfer that occurs when an object is moved by an applied force. It is a scalar quantity with units of Joules (J) in the SI system.

Work can be calculated as the product of the force applied to an object and the distance over which the force is applied. This is described by the equation W = Fd, where W is the work done, F is the force applied, and d is the distance over which the force is applied.

The direction of the force applied is important in determining the work done. Work is only done when the force is applied in the direction of the displacement of the object. If the force is applied perpendicular to the displacement, no work is done.

Therefore, During the third-meter portion of compression least work was done on the spring.

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The final momentum - initial momentum is the change in momentum.

Momentum is defined as mass multiplied by velocity.

m1 = initial momentum, m2 = final momentum, m = momentum change

Also, we need the magnitude of the change in momentum here, so please disregard the sign of momentum.

(A) m1 = 10*3 = 30 kg-m/s

m2 = 10 *0 = 0 kg-m/s

m = m2-m1= | -30 | = 30 kg-m/s

(B) m1 = 10 kg-m/s

m2 = 10 * (-1)  = -10 kg-m/s

m = -10 -10 = | -20 | = 20 kg-m/s

(C) m1= 40 kg-m/s

m2 = -20 kg-m/s

m = | -60 | = 60 kg-m/s

(D) m1= 30 kg-m/s

m2= -30 kg-m/s

m = | -60 | = 60 kg-m/s

(E) m1= 40 kg-m/s

m2 = 0 kg-m/s

m = | -40 | = 40 kg-m/s

(F) m1 = 20 kg-m/s

m2 = -20 kg-m/s

m =| -40 | = 40 kg-m/s

(G) m1 = 20 kg-m/s

m2 = 0

m = | -20 |= 20 kg-m/s

(H) m1 = 20 kg-m/s

m2 = -40 kg-m/s

m= | -60 | = 60 kg-m/s

Greatkg-m/sest to least ranking :

C = D = H> E = F > A > B = G

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A: Only a decreasing gravitational force that acts downward

According to Newton's law of universal gravitation, the force of attraction between two bodies is an attractive force, the magnitude of which is directly proportional to the multiples of the mass of each body and inversely proportional to the square of the distance between the two bodies.

Newton theorized that two of his objects separated by a certain distance tended to attract each other, and that this was part of the style of nature. He two objects in question are the object that falls into the center of the earth and the earth itself. This gravitational pull is called the Earth's gravitational pull. 

Your question is INCOMPLETE but most probably your full question was:

A ball is tossed straight up from the surface of a small, spherical asteroid with no atmosphere. The ball rises to a height equal to the asteroids radius and then falls. What forces if any act on the ball while it is traveling up?

A: Only a decreasing gravitational force that acts downward

B: Only a constant gravitational force that acts downward

C: Both a constant gravitational force that acts downward and a decreasing force that acts upward

D: No forces act at all

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The compression stroke of a four-cycle diesel engine, begins when the piston reaches TDC (top dead center) on the intake stroke and begins moving downward.

During the compression stroke, the air-fuel mixture is compressed by the piston, increasing its temperature and pressure. This high-pressure and high-temperature air-fuel mixture is then ignited by the spark plug or the high compression pressure in the case of a diesel engine, which drives the piston back up and completes the power stroke. The compression stroke is an essential part of the internal combustion process and helps to create the power needed to drive the vehicle. The engine's compression stroke is the phase during which the fuel/air combination is compressed prior to ignition. On the compression stroke, the intake valve closes and the piston begins to move. The piston ascends the cylinder during the compression stroke, compressing the fuel-air mixture.

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Convenience sampling has several potential biases that can impact the validity of a study. It is important for researchers to be aware of these biases and to consider alternative sampling methods, such as stratified or random sampling, to ensure that their sample is representative of the population of interest.

Convenience sampling is a type of sampling method where the researcher selects participants who are easily accessible and willing to participate in the study. It is often used in qualitative research and in situations where the researcher has limited resources, such as time and budget. However, convenience sampling has several potential biases that can impact the results of a study and compromise its validity.

One of the main biases of convenience sampling is selection bias. This occurs when the sample is not representative of the population of interest, leading to an over- or under-representation of certain groups. For example, if a researcher conducts a survey on drug use among high school students and only surveys students who are present during lunchtime, they may miss the experiences and perspectives of students who are absent during that time or have different lunch periods.

Another potential bias of convenience sampling is response bias, which occurs when participants do not answer questions truthfully or accurately. This can happen if participants feel pressure to provide socially desirable answers, or if they are not motivated to participate in the study. For example, if a researcher conducts a survey on alcohol use among college students and only surveys students who are present in the student union building, they may miss the experiences and perspectives of students who do not use that building.

Finally, convenience sampling can also lead to bias in the results if the participants are not diverse enough in terms of their demographic characteristics, such as age, gender, ethnicity, or socio-economic status. This can limit the generalizability of the results to other populations, as the findings may not be representative of the broader population of interest.

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The mathematical relationship between spring force and the stretch of a spring is F = - k x, where k is spring constant and x is the extension of the spring.

A spring is a material that may be bent by an external force before resuming its original shape.

Many of us use springs on a daily basis, yet we frequently ignore their inertia by treating them like massless objects. A spring's ability to experience displacement when stretched, compression when compacted, and return to equilibrium when free is a very casual process. This fact demonstrates that a spring compresses or stretches a body by applying an equal and opposite force.  

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The same capacitors, if connected in parallel across the same line, the energy stored is 36 J. The individual capacitances is 3.0μF.

What is capacitor?

A capacitor is a two-terminal electrical part with the capacity to store energy in the form of an electric charge. It uses two electrical cables that are separated from one another. The void between the conductors can be filled with vacuum or a dielectric, an insulating material.

What is energy?

The definition of energy is "capacity to do work, which is ability to apply force causing displacement of an object." Energy is just the force that moves objects, despite this definition's seeming complexity.

Let the capacitance of two capacitors be C1and C 2

​Line voltage V=4000 volts

Parallel connection :

Equivalent capacitance of series connection Cp =C1+C2

Energy stored Ep= 1/2 cpv²

∴ 36=1/2(C 1+C2 )(4000)²

C1+C2=4.5μF

We get C2=4.5μF−C1

Series connection :

Equivalent capacitance of series connection Cs= C₁C₂/C₁+C₂= C₁C₂/4.5 μF

C1C2 =4.5μF

Or C1(4.5−C1 )=4.5

Solving we get C1=1.5μF

C2=4.5−1.5=3.0μF

Therefore, the same capacitors, if connected in parallel across the same line, the energy stored is 36 J. The individual capacitances is 3.0μF.

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​

​

​

Answer:To solve this problem, we will use the following constants:

g

=

9.8

m

/

s

2

is the acceleration due to gravity

m

=

1.67

×

10

−

27

k

g

is the mass of a proton

q

=

1.602

×

10

−

19

C

is the charge of a proton

Let us first calculate the weight of a proton. To do so, we use:

F

=

m

g

We substitute:

F

=

(

1.67

×

10

−

27

k

g

)

(

9.8

m

/

s

2

)

We will get:

F

=

1.6366

×

10

−

26

N

As per the problem, the electrostatic force between the protons must be equal to the weight we derived. To calculate the electrostatic force, we use Coulomb's law:

F

=

k

q

1

q

2

r

2

Since we are dealing with two protons, we set:

q

1

=

q

2

=

q

We simplify:

F

=

k

q

2

r

2

We isolate the distance r:

r

=

√

k

q

2

F

We substitute:

r

=

√

(

9

×

10

9

N

m

2

/

C

2

)

(

1.602

×

10

−

19

C

)

2

1.6366

×

10

−

26

N

We get:

r

=

0.12

m

Explanation:

The protons must be placed at a distance of 7.42×10¹⁷ m apart so that the electrostatic force between them is equal to the weight of one proton.

Mass of the proton, = 1.67×10⁻²⁷ kg

Weight of the proton, W = 1.67×10⁻²⁷×9.81 = 1.64×10⁻²⁶ N = F

Charge on one proton, q = 1

Let the distance between proton, = d

Constant of permittivity of vacuum, ε₀ = 8.8 × 10⁻¹² C²/N-m²

Electrostatic force between two proton, F = q²/(4πε₀d²)

1.64×10⁻²⁶ = 1²/(4π × 8.8 × 10⁻¹² × d²)

d² = 5.514 × 10³⁵

d = √(5.514 × 10³⁵)

d = 7.42×10¹⁷ m

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The maximum shear stress at 18 degrees and the primary stress, respectively, are both 36.05 mpa.

The Mohr method is a very useful tool for finding primary stress, maximum shear stress, principle plane, or angle of the action. It is a technique that plots a circle using a graphical way in order to gather the necessary information.

Shear stress= 30

Tensile stress= 40

Compressive Stress= -40

Mohr circle using data is:

Figure

And the principal stress will be 36.05 mpa and maximum shear stress would be 36.05 mpa at 18 degrees.

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You need a capacitance of 6.00 μF to store 60.0 μC of charge using  single 10.0-V battery.

The amount of charge that can be stored at a given voltage by an electrical component is called a capacitor. The unit of capacitance is Farad (F) and 1F capacitor charged to 1V will hold one Coulomb of charge.

Capacitance, C, can be calculated as :

C = Q / V = 60.0 μC / 10.0 V = 6.00 μF

So, you need a capacitance of 6.00 μF to store 60.0 μC of charge using a single 10.0-V battery.

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200 degrees Celsius is equivalent to 392 degrees Fahrenheit (200°C 9/5) and 32. There are several standard temperature scales, including Celsius.

Bread is baked for 25 to 28 min at room temperature of 160 to 180 degrees Celsius. For around 40 to 45 minutes, the thimble cake is energy at 150 to 160 degrees Celsius. For 15 to 25 minutes, bake cookies at 170 to 190 degrees Celsius. Cream puffs bake for 25 to 30 minutes at 190 to 200 degrees Celsius. an appropriate way to.

According to Al Jazeera, Death Valley in California recorded the highest temperature ever, which was 134 ℃, or 56.7 degrees C, in 1913. By The highest temperatures ever recorded in this area are: Europe: 128 F (Tunisia, 1931) Asia.

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A beam has a square cross-section, a x a, where a is the linear dimension, and is subject to a pure bending moment, The minimum design factor such that the beam is guaranteed not to fail is (1.1 x M) / (1.12 x σ x (1.05 x a)^2 / 6).

The minimum design factor can be found by combining the uncertainties in the bending moment dimension, the cross-sectional area, and the material strength into a single factor that represents the safety margin against failure.

Let's call the design factor "n".

= n

= M / (σ.b.d^2 / 6)

here M is bending moment,

σ is material strength,

b is width of the cross-section,

d is height of the cross-section.

For a square cross-section, b = d = a.

The uncertainties in M, a, and σ can be taken into account by using the worst-case scenarios. In this case, the uncertainty in M is ±10%,

The minimum value for M is 0.9 x M

The maximum value for M is 1.1 x M.

The uncertainty in a is ±5%,

The minimum value for a is 0.95 x a

The maximum value for a is 1.05 x a.

The uncertainty in σ is ±12%,

The minimum value for σ is 0.88 x σ

The maximum value for σ is 1.12 x σ.

To find the minimum value for n, we'll use the minimum values for M, a, and σ:

= n

= (0.9 x M) / (0.88.σ.(0.95.a)^2 / 6)

To find the maximum value for n, we'll use the maximum values for M, a, and σ:

= n

= (1.1 x M) / (1.12 x σ x (1.05 x a)^2 / 6)

The minimum value for n is the larger of these two values, as it represents the worst-case scenario. If the minimum value for n is greater than 1, then the beam is guaranteed not to fail. If the minimum value for n is less than 1, then the beam is not guaranteed not to fail and must be redesigned to have a higher n value.

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Answer:

The four types of thermal energy we have...

Explanation:

Evaporation

By heating a substance to a temperature where the vapour pressure is appreciable and atoms or molecules are lost from the surface in a vacuum, a substance is said to have undergone thermal evaporation.

Conduction

The transfer of thermal energy within a substance or between materials in contact is known as thermal conduction.

Convection

Convection is the process through which matter moves inside fluids to transfer thermal energy.

Radiation

The electromagnetic radiation that a body produces when its temperature is higher than absolute zero is known as thermal radiation.

Have a lovely day :)

We have four forms of thermal energy:

Evaporation

Conduction

Convection

Radiation

The four types of thermal energy are:

Evaporation: Thermal evaporation occurs when a material is heated to a temperature where the vapour pressure is perceptible and atoms or molecules are lost off the surface in a vacuum.

Conduction: Heat conduction is the flow of thermal energy within a substance or between materials in contact.

Convection: Convection is the movement of materials inside fluids to transmit thermal energy.

Radiation: The electromagnetic radiation that a body produces when its temperature is higher than absolute zero is known as thermal radiation.

Here,

The four types of thermal energy we have...

Evaporation

Conduction

Convection

Radiation

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Based on the recoil distance of the two balls, the ball that has greater density is Ball A.

The relationship between a substance's mass and the amount of space it occupies is known as its density (volume).

The density of a substance is determined by the mass, size, and arrangement of its atoms. Density (D) is defined as the product of a substance's mass and volume.

Comparing the densities of the balls show that the ball with the lesser density will recoil farther than the ball with the greater density because it has less momentum.

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Jack's preferences are strictly monotonic and exhibit diminishing marginal utility.

Strictly convex preferences mean that Jack's preferences between two bundles of goods do not change as the proportion of goods in the bundle changes. In other words, Jack values diversity of goods and the more he has of one good, the less he values additional units of that good.

The fact that Jack finds the bundles (1,9) and (9,1) to be indifferent means that he values both of these bundles equally, or in other words, he has the same utility from both of these bundles. This implies that Jack's marginal utility of the two goods decreases as he consumes more of either of them.

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Without more information, it is impossible to estimate the light output of the stage, which has six gels covering the spotlight.

However, without knowing more about the exponential relationship and the characteristics of the gels, it is impossible to precisely calculate the intensity of the light on stage with six gels over the spotlight. The statement that the temperature decays exponentially with the thickness of material covering it may imply that the intensity of light is proportional to the exponential of the thickness of material. It would be important to know more about how the exponential decrease of temperature and the thickness of the material relate in order to calculate the intensity. Additionally, the gels' characteristics, such as their optical characteristics, may also be important in

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A jet stream is a fast-flowing, narrow air current found in the upper levels of the Earth's atmosphere. It is formed due to differences in air temperature and pressure, and it can have a significant impact on the weather and climate.

Jet streams are formed as a result of the movement of air from warm to cold regions.

The Great Red Spot (GRS) on Jupiter is a long-lived, high-pressure storm that has been observed for over 300 years. Scientists believe that the stability and longevity of the GRS can be attributed to several factors, including:

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Plasticity is option B) a teenager who spends a summer in Chile and learns to speak Spanish. Plasticity refers to the ability of the brain to change and adapt in response to new experiences and information. It is a crucial aspect of human development and learning.

The teenager in this example is experiencing a change in their brain as they learn a new language. Through exposure to the language and practice, the brain is adapting and creates new connections to process and understand the Spanish language. This type of plastic change is known as neuroplasticity and is a prime example of the brain's ability to change in response to new experiences.

On the other hand, options A) a man who consistently drives his car too fast, C) a woman who leaves her job to stay home with her newborn, and D) a person who is in a coma do not show plasticity in the same way. While these changes may have an impact on the brain, they do not involve the same level of new learning and adaptation as the teenager who learns Spanish.

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Distance between the particles when t = 4s:To find the distance between A and B, we need to find their positions as a function of time.

The position of particle A can be found using the equation:

[tex]x A = (1/2)at^2 + v0t + x0,[/tex]

where[tex]v0 = 0 m/s[/tex] (since both particles start from rest), [tex]x0 = 0 m[/tex], and[tex]a = 6 m/s^2.[/tex]

So,[tex]x A = (1/2)(6 m/s^2)(4 s)^2 = 48 m[/tex]

The position of particle B can be found using the equation:

[tex]x B = (1/2)at^2 + v0t + x0,[/tex]

where [tex]v0 = 0 m/s[/tex] (since both particles start from rest), [tex]x0 = 0 m[/tex], and [tex]a = (12t^2 - 8) m/s^2.[/tex]

So, [tex]x B = (1/2)((12)(4^2) - 8) (4s)^2 = 64 m[/tex]

The distance between the two particles at t = 4 s is [tex]|x A - x B| = |48 m - 64 m| = 16 m.[/tex]

Total distance traveled by each particle in t = 4s:

The total distance traveled by particle A in 4 seconds can be found using the equation:

[tex]d A = (1/2)at^2 + v0t + x0[/tex],

where[tex]v0 = 0 m/s[/tex] (since both particles start from rest), [tex]x0 = 0 m[/tex], and[tex]a = 6 m/s^2.[/tex]

So,[tex]d A = (1/2)(6 m/s^2)(4 s)^2 = 48 m[/tex]

The total distance traveled by particle B in 4 seconds can be found using the equation:

[tex]dB = (1/2)at^2 + v0t + x0[/tex],

where [tex]v0 = 0 m/s[/tex](since both particles start from rest), [tex]x0 = 0 m[/tex], and [tex]a = (12t^2 - 8) m/s^2.[/tex]

So, [tex]dB = (1/2)((12)(4^2) - 8) (4s)^2 = 64 m[/tex]

In 4 seconds, particle A travels a total of 48 m and particle B travels a total of 64 m.

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Each double bond and each ring represent: one degree of unsaturation.

Degree of unsaturation is a measure to how many hydrogen atoms molecule is missing in order to be fully saturated. Compound that does not have maximum number of hydrogens per its structure is said to be unsaturated.

One degree of unsaturation is equivalent to 1 ring or 1 double bond (1 π bond) and two degrees of unsaturation is equivalent to 2 double bond, 1 ring and 1 double bond, 2 rings or 1 triple bond. General formula is CnH2n–2 and compounds containing double or triple bonds are often referred to collectively as unsaturated compounds.

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Distance travelled by object from 0 to 10 seconds is 50 m. We can calculate it using equation of motion.

We need to calculate the distance from 0 to 10 seconds for the object.

As in the question, acceleration is constant, we can thus utilize the equation of motion to calculate the value of distance using magnitudes of time and acceleration.

The equations of motion describe the time evolution of an object's position and velocity in a given force field.

[tex]s = ut + (1/2)at^{2}[/tex]

Insert the given values, and we get:

s = 2*10 + (1/2)*0.6*10*10S = 50 m

Therefore, distance is 50 m. As velocity is continuously increasing in magnitude, displacement will also be equivalent to the distance.

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Complete question: Image of the graph has been uploaded.

We have from the question on the proportionality that;

a) 147 m

b) 11 s

Direct proportionality is a mathematical relationship between two variables where a change in one variable is accompanied by a proportional change in the other variable. In other words, if the values of two variables are directly proportional, they change in such a way that the ratio of the two variables remains constant.

We know that we have to find the constant of the proportionality first as such we have that;

s α t

s = kt^2

k = s/t^2

k = 75/5^2

k = 3

a) s = 3 * (7)^2

= 147 m

b) t =(s/k)^1/2

t = (363/3)^1/2

t = 11 s

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a) Scalar quantity, b) Vector quantity, c) Vector quantity, d) Scalar quantity, e) Vector quantity, f) Scalar quantity, g) Scalar quantity, h) Scalar quantity.

A scalar quantity is a physical quantity with a single numerical value. Scalar quantities include mass, temperature, and velocity.

A vector quantity is a physical quantity that has a magnitude as well as a direction. Displacement, velocity, and acceleration are examples of vector quantities. Scalar quantities may be stated as a single numerical value, but vector quantities must be expressed as a magnitude and a direction.

In physics, vector quantities are frequently employed to describe physical qualities such as force, velocity, and acceleration. The parallelogram technique can be used to add and subtract vector values. Scalar quantities, on the other hand, cannot be added or subtracted in the same way. Scalar quantities are easily added and subtracted.

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The least harmful form of ionizing radiation is considered to be low-energy X-rays. X-rays are a form of electromagnetic radiation with a higher frequency and energy than visible light.

They have sufficient energy to ionize atoms and molecules, but their low energy level means that they generally do not cause significant harm to living tissue. However, it is important to note that even low-energy X-rays can still be harmful if a person is exposed to a large dose of them. This is why it is important to limit exposure to ionizing radiation, including X-rays, by using protective measures such as lead shielding and keeping the exposure time as short as possible. In general, the harm from ionizing radiation is related to the energy of the radiation and the amount of exposure. Higher energy and higher dose levels are more harmful. So, it is always important to minimize exposure to ionizing radiation, regardless of the type.

To know more about radiation please refer: https://brainly.com/question/13934832

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