If she drove back home using the same path she took out to the university and arrives 7.7 h after she first left home, what was her average speed for the entire trip, in kilometers per hour?

Answer:

at the vertical change

Explanation:

i believe this is right

The value of charge in coulombs is 0.9 × 10—⁹ coulombs.

Radius 1 of the surface = 0.5 m

Radius 2 of the sphere = 1.9 m

Area of the surface = 3

The magnitude of the electric field at the surface = 8300 N/C

The electric flux through a surface is,

[tex] Electric \: flux=Electric \: field \: \times area \: of \: the \: surface[/tex]

[tex]Φ = E \times S[/tex]

[tex]Φ = EScosθ[/tex]

[tex]Φ =E \times 4 \times \pi \times r ^{2} [/tex]

According to Gauss, the net electric flux is,

[tex]Net \: electric \: flux = \frac{1}{E _{0} } \times charge \: enclosed[/tex]

[tex]Charge \: enclosed = 4 \times \pi \times E _0 \times a \times r ^{3} [/tex]

[tex] = \frac{1}{9 \times 10 ^{9} } \times 3 \times (1.4) ^{3} [/tex]

[tex] = 0.9 \times 10 ^{ - 9} \: C[/tex]

Therefore, the value of charge in coulombs is 0.9 × 10—⁹ coulombs.

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Answer: 1.3%

The speed of a bullet train is measured to be 312.0 mph ± 3.9 mph. What is the percent uncertainty in this measurement?(1 point) 1.3%

A sample of matter, either a single element or a single compound, that has definite chemical and physical properties: is an atom

An atom is the smallest unit of an element that still retains the distinctive behavior and definite chemical and physical properties of the element.

A single atom of an element keep its distinctive behavior, that's because the atom is the smallest unit of the composition of matter

The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.

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Answer:

one in which the motion of a particle not subject to forces is in a straight line at constant speed

Explanation:

I searched this on the internet

The correct answer is α=31, β=73.4, γ=64.62.

The magnitude of a force is the measurement or size of the force acting on an object. The amount of the resultant force is the vector sum of the forces acting on the body. There are frequently several forces acting on a body at once. Either they act in unison or in opposition to one another.

Given :

F1 = 20i - 10j,

F2 = 30j + 10k,

and F3 = 40j + 20k.

We need to find the magnitude of the combined forces.

F_net= F_1+F_2+F_3

F_net=20i-10j+30j+10k+40i+20k

F_net=60i+20j+30k

|F_net|=√(20)^2+(60)^2+(30)^2

=√(400+3600+900)

=√4900

=70N

Direction of force=

cos α=F_x/|F_net|=60/70

cos β=F_y/|F_net|=20/70

cos γ=F_z/|F_net|=30/70

α=31

β=73.4

γ=64.62

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Kw = 4.36×10^-16 is the value of kw at temperature when the ph of a neutral solution is 7.68.

The formula for Kw is:

Kw= [H]*[OH]

where [H] and [OH] are concentrations

We are given the pH so we can calculate the [H] concentration from the formula:

pH=-log[H]

[tex]P_{H} =-log_{10} [H^{+} (aq)][/tex]

[tex]-P_{H} =log_{10} [H^{+} (aq)][/tex]

[tex][H^{+} (aq)]=10^{-P_{H} }[/tex]

[tex][H^{+} (aq)]=10^{-7.68}[/tex]

[tex][H^{+}(aq) ]=[/tex]2.089×[tex]10^{-8}[/tex]mol [tex]dm^{-3}[/tex]

In neutral solution, [H] = [OH],

therefore: [OH]=2.089×10^-8M

Calculating Kw:

Kw = (2.089×10^-8M) *(2.089×10^-8M)

Kw = 4.36×10^-16

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The width of central maximum increases if the wavelength is increased.

The width of the central maximum is simply the distance between 1st order minima from the center of the screen on both sides. Thus, the central maximum becomes twice as wide if the slit width a becomes half as wide.

For one slit experiment, the size(angular width) of the central maximum is given by a 2 λ a , where a is that the slit width. therefore the width of the central maximum is directly proportional to the wavelength of light and inversely proportional to slit width.

A central maximum is that the brightest central zone of a diffraction pattern on the screen. The central maximum has the utmost intensity and widest of all the other diffraction fringes

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Vector a b = c, and that |al |b| = |cl, vectors a and b oriented with respect to each other because they are perpendicular to each other.

A vector is an object that has both magnitude and a direction. Geometrically, we can picture vector as a directed line segment, whose length is the magnitude of the vector and with an arrow indicating the direction. The direction of vector is from its tail to its head.

Two vectors are the same if they have same magnitude and direction. This means that if we take a vector and translate it to a new position (without rotating it), then vector we obtain at the end of this process is the same vector we had in beginning.

Two examples of vectors are those that represent the force and velocity. Both the force and velocity are in a particular direction. The magnitude of vector would indicate the strength of the force or the speed associated with the velocity.

We denote vectors using the boldface as in a or b. Especially when writing by hand where one cannot easily write in boldface, people will sometimes denote vectors using the arrows , or they use the other markings. We won't need to use the arrows here. We denote magnitude of the vector a by |a|. When we want to refer to a number and stress that it is not a vector, we can call number a scalar. We will denote scalars with the italics, as in a or b.

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The electric field is 42750 N/C.

We need to know about the electric field to solve this problem. The electric field is the area that is affected by electric energy. The magnitude of the electric field can be determined as

E = k . Q / R²

where E is electric field, k is coulomb's constant (9 x 10⁹ Nm²/C²), Q is charge and R is radius.

From the question above, we know that

Q = 1.9 nC = 1.9 x 10¯⁹ C

R = 2 cm = 0.02 m

By substituting the parameters, we get

E = k . Q / R²

E = 9 x 10⁹ . 1.9 x 10¯⁹ / 0.02²

E = 42750 N/C

Hence, the electric field is 42750 N/C

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The weight of ourselves on the new planet will reduce by 1/4 factor.

We know that each body attracts another body, Now if we free fall on any planet then the natural acceleration or acceleration due to gravity force is called gravitation acceleration.

The gravitation acceleration is given by,

g = GM/R²

Where G is constant while M is the mass of the planet and R is the radius of that planet.

The value of g or gravitational acceleration for the earth is 9.81 m/sec².

Given that the new planet has a mass of 4 times then earth and diameter is also 4 times.

Since gravitation acceleration of earth ;

g = GM/R²

Since the diameter is 4 times so radius will also 4 times.

New planet acceleration ;

g' = G(4M)/(4R)²

g' = 4/16(GM/R²)

g' = 1/4(g)

Hence "The weight of ourselves on the new planet will reduce by 1/4 factor".

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The person that practicing yoga for one hour burns 285 kilocalories (kcal) burned: 1192440 j of energy

To solve this problem the we have to do the conversion of units with the given information.

Information about the problem:

By converting the energy units from kilocalories (kcal) to joules (j) we have:

energy =285  kcal * 4184 j/ 1 kcal

energy = 1192440 j

It is the transformation of a value expressed in one unit of measurement into an equivalent value expressed in another unit of measurement of the same nature.

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If you look at courage and if you look at the brain, there is one particular brain structure that plays a very important role when it comes to courage and your own performance. This part of the brain is called the amygdala. The amygdala is a brain structure that is very small, and we have two of them, one of the left side of the brain, one on the right side of the brain. They’re very small and look like an almond. Amygdala is also the Latin word for almond. Even though they are small, they amygdala is also extremely powerful. It plays a very important role in our survival. Whenever there is a real danger outside, it will trigger a fight, flight or freeze response, so you will fight danger, run away, or just be blocked in your own emotions, you will freeze, perhaps you will hide. The amygdala is very important for our survival and for many emotions in general, but in many situations, the amygdala will also become active when there is no real danger, for example, standing on stage and holding a presentation, leading a difficult conversation. These are two examples where there’s no real danger, but nevertheless, the amygdala can be triggered and cause this feeling of nervousness and anxiety. It’s these feelings of nervousness, anxiety or insecurity that will also block us in our potential to hold a presentation or to lead a good conversation.

Answer:

huhu

chuba bi miayang yo

trip rp rrip trip

Explanation:

how are things going with your family in the car with the family in because or am we supposed for a car to stay at the airport and get a taxi

The best choice is A. We transition from a gaseous to a liquid state by condensing steam. Entropy declines as unpredictability rises in a liquid transition from a gaseous state.

The degree of disorder in a system is measured by entropy. Disorder refers to the "distance" and "separation" between molecules, particles, etc. Because they have rigid structures as opposed to gases and liquids, which have free structures, solids and crystals have less chaos. Compared to solids and crystalline formations, gases and liquids contain higher levels of chaos. Entropy increases as heat and energy are added, which indicates that disorder is spreading more quickly. Entropy is a measure of how much chaos there is in a system and how rigid and organized it becomes when less heat and energy are contributed.

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The moon appears 1.1153 during perigee than at apogee.

Perigee is the point at which the moon is nearest to the Earth each month.

The points of apogee and perigee varies throughout the year.

Apogee is the point at which the moon is farthest to the Earth each month.

from the data given,

perigee= 364000km

Apogee= 407000km

diameter= 3480km

p/a = 406,000/364,000

= 1.1153.

Thus, the moon appears 1.1153 during perigee than at apogee.

In conclusion,  it has been scientifically found that in periods of four years, lunar perigees and apogees fall on the same or nearly the same calendar dates.

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The total time it is in the air for the ball is 3.672 s

Given:

Initial velocity = 18 m/s

We have to find the total time the ball is in the air.

By using the formula, we get,

t = v - u/a

Where t = time to reach the maximum height

v = final velocity of the ball = 0 m/s

u = initial velocity of ball = 18 m/s

a = acceleration due to gravity = -9.8

Acceleration of gravity is taken as negative because the ball is moving in the opposite direction.

t = 0 - 8/-9.8

t = 1.836 sec

Thus, time is taken by the ball to reach the ground again = time taken to reach the maximum height

So, the Total time required for the ball to reach the ground = 2t = 2 × 1.836

Total time required for the ball to reach the ground = 3.672 s

Hence, the total time it is in the air for the ball is 3.672 sec.

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Answer:

The graph is trying to show a comparison of statistics. In order to fully understand this graph, we need a label for the different colors and sections in the graph and a title for the graph. Without this information, we cannot fully understand what this graph is trying to portray.

Explanation:

hope this helps!

This is thus because voltage divided by distance determines how strong an electric field is. The field is inversely proportional to this spacing at constant voltage.

More charge can flow via a stronger field, increasing capacitance.

In the simplest terms, the closer two items are near one another, the greater the influence; conversely, the further apart they are, the lesser the influence. As a result, capacitance decreases as spacing increases.

The ratio of the quantity of electric charge held on a conductor to an electric potential difference is known as capacitance. Self-capacitance and mutual capacitance are two concepts that are related to one another.

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The differential equation for the concentration of the chemical is given by dc/dt = (3/10⁶)(1 - 100c)

Suppose that a(t) is the amount of chemical in the pond at time t.

So, a'(t) = rate of chemical inflow - the rate of chemical outflow.

So, da/dt = (0.01)300 - (a/10⁶)300

So, da/dt = 3 - 3a/10⁴

Now,

Since, c = a/v

Then, c' = a'/v

So, c' = (3 - 3a/10⁴)/10⁶

Or, c' = 3 (1 - a/10⁴)/10⁶

So, dc/dt = 3/10⁶ (1 - cv/10⁴)

So, dc/dt = (3/10⁶) (1 - 100c)

Therefore the differential equation for the concentration of the chemical is dc/dt = (3/10⁶)(1 - 100c)

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During this inattentive period, the distance traveled is 73.33 when the speed is 120 km/h and the time taken is 2.2 s.

Every moving object travels a particular distance over time. These two factors enable us to determine the speed. The frequency of displacement is the sole determinant of speed. The complete mobility of an object, regardless of direction, will be its distance. No matter where an object originates or finishes, distance measures how much ground it has travelled. A process, an action, or a condition's duration is the amount of time that can be measured or quantified. Speed is the rate at which an object travels along a path over time, whereas velocity is the speed and direction of an item's motion. In another sense, velocity is a vector, whereas speed is a scalar value. There is a formula that connects these three things. Speed can be thought of as a gauge for a body's rate of motion. The distance covered in a single unit of time is how it is defined.

Speed = Distance/ Time

We are given Average speed, = 120 km/h=(120 * 1000)/3600=33.33 m/s

Time, t=2.2s

Now speed =  Distance/ Time

⇒ Distance = speed * time=33.33*2.2=73.33

Thus distance traveled is 73.33 m

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Answer:

1.An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force.

3.Let speed of balls are v

1

and v

2

.

There is no external force acting, momentum will be conserved.

m

1

u

1

+m

2

u

2

=m

1

v

1

+m

2

v

2

⇒m×6−m×6=mv

1

+mv

2

⇒v

1

=−v

2

Coefficient , e=−

u

1

−u

2

v

1

−v

2

⇒

3

1

=−

6+6

v

1

−v

2

⇒v

1

=−2m/sWhen two objects with the same mass collide, Newton's laws tell us that they will accelerate the same amount but in opposite directions.

Collision Forces - 5/5

1. A) Motion will be either created, stopped or changed.

2. D) 5,208 N

3. B) the mass and acceleration of each person

4. C) balanced forces

5. B) 13.125 N to the right

Hope this helps ya out peeps!

The work done required to raise a 50-kilogram bag 5 meters vertically vs a 25 kg bag of cement is the same.

Work done in lifting 25 kg by 10 m vertically

⇒ [tex]w_{1} = f_{1} d_{1}[/tex]

[tex]= (m_{1} g)d_{1}[/tex]

= 25 × 9.8 × 10 J

= 2450 J

Work done in lifting 50 kg by 5 m vertically

[tex]w_{2} = f_{2} d_{2}[/tex]

[tex]= (m_{2} g)d_{2}[/tex]

= 50 × 9.8 × 5

= 2450 J

Here, both are the same.

The product of an object's displacement and the issue of the carried out force this is directed inside the direction of the object's displacement is called the paintings done via a pressure.

The vertical motion has no effect and is 0. best the horizontal component is protected for computations for the reason that object travels horizontally. As a result, the vertical component of the pressure does no longer work.

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By unit conversion, the power is 4.023 HP.

We need to know about unit conversion to solve this problem. The unit conversion can be used to convert a unit to another unit. It can be defined as

a = xb

where a is unit a, b is unit b and x is the constant of conversion.

From the question above, we know that

P = 3000 watts

unit conversion

(1 HP = 745.7 watts)

Convert the unit conversion

1 HP = 745.7 watts

divide by 745.7

1/745.7 HP = 1 watts

Convert the aspirin power to horsepower

P = 3000 watts

P = 3000 x 1/745.7 HP

P = 3000/745.7 HP

P = 4.023 HP

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The correct answer is 0.00981 kJ/mol.

Every object we encounter has a binding force, and the energy that holds them together is the binding energy. The binding energy is the least amount of energy necessary to remove an electron, proton, or neutron from the nucleus. A nucleus contains electrons and protons that are strongly bound by energy.

Free energy of binding can be calculated using formula, Gbinding = dE coluombic + dEvdw + dGhyd. -TdS where Evdw+Ecoulombic is protein ligand interaction, dGhyd is change in hydration energy.

dS is entropy. dG hydration is Gpolar+Gnon polar. Inhibition constants are given for CBD and

THC = 4350nm, and 44nM. So,

dG = Ki + Ki' = 44+4350 = 4394 and

in kJ/mol = NahC/4394 = (6.022x10^23x6.626x10^-34x3x10^8)/4394 = 0.00981 kJ/mol

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e = 0.57 is the moon's orbital eccentricity

You may determine the ellipse's eccentric formula by using

e = r a - r p / r a + r p

The distance r a between the moon and its planet is the greatest.

r p=0.27 The shortest distance between the moon and its planet is r a.

Then, e = r a - r p / r a + r p

e is defined as (r a - 0.27 r a) / (r a + 0.27 r a).

e = 0.73r a / 1.27 r a

e = 0.57

The eccentricity of a conic section expresses how much it resembles a circle. Every conic section has this distinctive parameter, and conic sections are only said to be identical if and only if their eccentricities are the same. A conic section's eccentricity is a non-negative real integer that specifically describes its shape. Formally speaking, two conic sections are comparable if and only if their eccentricities match. The eccentricity can be thought of as a measurement of how far a conic section strays from being round.

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NO, It is an Right Triangle

p(2 , - 1 0)  Q ( 4,  1, 1)  R( 4, -5, 4)

PQ2  =  ( 2 -4)^2 + (-1-1)^2 +( 0-1)^2

PQ^2= (4 + 4  +1 )=9

PQ = 3  

QR^2 = ( 4 - 4)^2 + ( 1 +5)^2 + ( 1-4 )^2

=  0 + 36 + 9  =45

QR = √45 =3√5

RP^2 =  ( 4-2)^2 + ( -5 +1)^2 + (4-0)^2

 =  4 + 16 + 16 = 36

   RP = 6

 LENGTH  OF  SIDES ARE   3 ,6 ,  3√5

and  ajsoPQ^2 + RP^2  = 9 + 36 = 45 =QR^2

PQR   is a  right  angle  triangle

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The speed of light in a vacuum is the same for all frames of reference.

so "Light travels through space at a speed of 3.0 x 10^8 m/s."

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