Identify the organelle pictured:

A. Chloroplast

B. Endoplasmic reticulum

C. Golgi apparatus

D. Mitochondria​

"Constant velocity" means that there is no acceleration. Acceleration = 0 .

So its graph is zero at every time. The line on the graph lies on the X-axis.

Answer:

42m/s

6.06s

Explanation:

To find the initial velocity and time in which the ball is fling over the ground you use the following formulas:

\(x_{max}=\frac{v_o^2sin(2\theta)}{g}\\\\x_{max}=vt_{max}\)

θ: angle = 45°

vo: initial velocity

g: gravitational constant = 9.8m/s^2

x_max: max distance = 180 m

t_max: max time

by replacing the values of the parameters and do vo the subject of the first formula you obtain:

\(v_o=\sqrt{\frac{gx_{max}}{sin(2\theta)}}\\\\v_o=\sqrt{\frac{(9.8m/s^2)(180m)}{sin(2(45\°))}}=42\frac{m}{s}\)

with this value of vo you calculate the max time:

\(t_{max}=\frac{x_{max}}{v}=\frac{x_{max}}{v_ocos(45\°)}\\\\t_{max}=\frac{180m}{(42m/s)cos(45\°)}=6.06s\)

hence, the initial velocity of the ball is 42m/s and the time in which the ball is in the air is 6.06s

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TRANSLATION:

Para encontrar la velocidad inicial y el tiempo en el que la pelota está volando sobre el suelo, use las siguientes fórmulas:

θ: ángulo = 45 °

vo: velocidad inicial

g: constante gravitacional = 9.8m / s ^ 2

x_max: distancia máxima = 180 m

t_max: tiempo máximo

reemplazando los valores de los parámetros y haciendo el tema de la primera fórmula que obtiene:

con este valor de vo usted calcula el tiempo máximo:

por lo tanto, la velocidad inicial de la pelota es de 42 m / sy el tiempo en que la pelota está en el aire es de 6.06 s

60/3

so the answer is 20 km/h

Answer:

the initial force exerted on the rocket is 900 N

Explanation:

The computation of the initial force exterted on the rocket is shown below:

Force exerter = Rate of change of momentum

= 300 m/s × 3kg/s

= 900 N

hence, the initial force exerted on the rocket is 900 N

we simply multiplied the rate with its speed so that the force could come

The density of mercury at \(200^{\circ}C\) is \(13122.35 kg/m^3\).

It is given that,

The initial temperature, \(T_0=0^{\circ}C\).

The density of mercury at \(0^{\circ}C\) is \(\rho_{0}=13600 kg/m^3\).

The volume expansion coefficient for mercury is \(\alpha_v=182\times10^{-6} (^{\circ}C^{-1})\).

The final temperature, \(T=200^{\circ}C\).

Let us assume that,

The initial volume of mercury is \(V_0\) \(m^3\).

The final volume of mercury is \(V\) \(m^3\).

The volume expansion formula is given as,

\((V-V_0)=V_0\alpha_v(T-T_0)\)

\(\Rightarrow V=V_0+V_0\alpha_v(T-T_0)\)

\(\Rightarrow V=V_0+V_0(182\times10^{-6})(200-0)\)

\(\Rightarrow V=V_0+(0.0364)V_0\)

\(\Rightarrow V=1.0364V_0\)

The initial density, \(\rho_0=\frac{m}{V_0}=13600 kg/m^3\).

Hence. the final density, \(\rho=\frac{m}{V}\).

So, \(\frac{\rho}{\rho_0}=\frac{m/V}{m/V_0}\)

\(\Rightarrow \frac{\rho}{13600}=\frac{V_0}{V}\)

\(\Rightarrow \frac{\rho}{13600}=\frac{V_0}{1.0364V_0}\)

\(\Rightarrow \rho=\frac{13600}{1.0364} kg/m^3\)

\(\Rightarrow \rho=13122.35 kg/m^3\)

Therefore, the density of mercury at \(200^{\circ}C\) is \(13122.35 kg/m^3\).

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Answer: A mixture

Explanation:

A mixture is where 2 or more substances are physically combined, and where you can know what each substance is

Answer: Mixture

Mixture is made up of two or more different substances, which are mixed but not combined chemically.

Explanation:

Hope this helps =)

Answer

Resistivity R = K * L / A    where resistivity is constant for material, L the length of the material and A the area of the material

K = R * A / L     where R is the resistance of the material

Answer:

velocity is the rate of change of distance moved with a time in a specific direction. While speed is the rate if distance with time in no specific direction

(i)Therefore, it takes approximately 9.27 hours to reach its full power output.(ii)It is necessary to have quick-start power sources, this helps maintain a stable and reliable electricity supply even when wind speeds fluctuate.(c)The Bremsstrahlung effect needs to be considered to ensure proper radiation protection.(d) The near-field region is characterized by strong electric and magnetic fields while the far-field region represents the radiation zone.

(i) To calculate the time it takes for the power station to reach its full power output, we can use the formula:

Energy = Power × Time

Given that the power station generates 6120 MWh of energy over a 10-hour period and the rated power at full capacity is 660 MW, we can rearrange the formula to solve for time:

Time = Energy ÷ Power

Converting the energy to watt-hours (Wh):

Energy = 6120 MWh × 1,000,000 Wh/MWh = 6,120,000,000 Wh

Converting the power to watt-hours (Wh):

Power = 660 MW × 1,000,000 Wh/MW = 660,000,000 Wh

Now we can calculate the time:

Time = 6,120,000,000 Wh ÷ 660,000,000 Wh ≈ 9.27 hours

Therefore, it takes approximately 9.27 hours (or 9 hours and 16 minutes) for the power station to reach its full power output.

(ii) The type of power station that can be started up fastest is a gas-fired power station. Gas-fired power stations can reach full power output relatively quickly because they use natural gas combustion to produce energy.

In contrast, other types of power stations, such as coal-fired or nuclear power stations, have longer start-up times. Coal-fired power stations require time to heat up the boiler and generate steam, while nuclear power stations need to go through a complex series of procedures to ensure safe and controlled nuclear reactions.

This is relevant to optimizing the usage of windfarms because wind power is intermittent and dependent on the availability of wind. This helps maintain a stable and reliable electricity supply even when wind speeds fluctuate.

(c) The Bremsstrahlung effect is a phenomenon that occurs when charged particles, such as electrons, are decelerated or deflected by the electric fields of atomic nuclei or other charged particles. As a result, they emit electromagnetic radiation in the form of X-rays or gamma rays.

In shielding design, the Bremsstrahlung effect needs to be considered to ensure proper radiation protection. These materials effectively absorb and attenuate the emitted X-rays and gamma rays, reducing the exposure of individuals to harmful radiation.

(d) The electromagnetic field output from an antenna can be represented by two main regions:

Near-field region: This region is closest to the antenna and is also known as the reactive near-field. It extends from the antenna's surface up to a distance typically equal to one wavelength. In the near-field region, the electromagnetic field is characterized by strong electric and magnetic field components.

Far-field region: Also known as the radiating or the Fraunhofer region, this region extends beyond the near-field region.The electric and magnetic fields are perpendicular to each other and to the direction of propagation.  The far-field region is further divided into the "Fresnel region," which is closer to the antenna and has some characteristics of the near field, and the "Fraunhofer region," which is farther away and exhibits the properties of the far-field.

The transition between the near-field and the far-field regions is gradual and depends on the antenna's size and operating frequency. The size of the antenna and the distance from it determine the boundary between these regions.

In summary, the near-field region is characterized by strong electric and magnetic fields, while the far-field region represents the radiation zone where the energy is radiated away as electromagnetic waves.

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The trip takes a total of 1.5 hours and has an average speed of 40 mph.

To calculate the time taken for each leg of the trip, we can use the formula time = distance/speed.

For the first leg of the trip, the car travels 15 miles at a speed of 45 mph. Using the formula, we find that the time taken for this leg is 15/45 = 0.33 hours.

For the second leg of the trip, the car travels another 15 miles but at a speed of 30 mph. Using the formula, we find that the time taken for this leg is 15/30 = 0.5 hours.

To find the total time for the trip, we add the times for each leg: 0.33 hours + 0.5 hours = 0.83 hours.

To calculate the average speed for the entire trip, we use the formula average speed = total distance/total time. The total distance traveled is 15 miles + 15 miles = 30 miles. The total time taken is 0.83 hours. Plugging these values into the formula, we find that the average speed for the trip is 30/0.83 = 36.14 mph.

Therefore, the trip takes a total of 1.5 hours and has an average speed of 40 mph.

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The maximum height the ball will rise if Jean throws it straight upward is 0 meters above the release point.

To find the maximum height the ball will rise if Jean throws it straight upward, we can use the concept of projectile motion. The key idea is that the vertical component of the initial velocity is zero at the highest point of the trajectory.
Given that the maximum horizontal distance is 58.2 m, we can assume that the initial speed (also known as the magnitude of the initial velocity) is constant for all launch angles.  

Let's denote the maximum height as "h" (measured in meters above the release point). At the highest point of the trajectory, the vertical velocity component will be zero.
Using the equation for the vertical displacement in projectile motion, we have:

Vertical displacement = (Initial vertical velocity * time) + (0.5 * acceleration due to gravity * time^2)

Since the ball is thrown straight upward, the initial vertical velocity is positive (upward). The acceleration due to gravity is negative (downward). Therefore, the equation becomes:
h = (0 * t) + (0.5 * (-9.8 m/s^2) * t^2)

Simplifying the equation, we have:
h = -4.9t^2

To find the time it takes for the ball to reach its highest point, we need to use the equation for the vertical component of the velocity:

Vertical velocity = Initial vertical velocity + (acceleration due to gravity * time)
Since the vertical velocity is zero at the highest point, we have:
0 = 0 + (-9.8 m/s^2) * t

Solving for t, we find:
t = 0

This means that at the highest point of the trajectory, the ball has been in the air for 0 seconds.
Substituting t = 0 into the equation for h, we find:
h = -4.9(0)^2
h = 0

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When Jean throws the ball straight upward, it will not rise to any height above the release point. It will only reach the same level as the release point. To determine the maximum height the ball will reach when thrown straight upward, we need to use the concept of projectile motion. When the ball is thrown straight upward, it experiences a vertical motion under the influence of gravity.

First, we need to find the initial vertical velocity of the ball. Since the ball is thrown straight upward, the initial vertical velocity is equal to zero.

Next, we need to find the time it takes for the ball to reach its maximum height. We can use the equation:

    t = (final velocity - initial velocity) / acceleration

The final velocity is zero, the initial velocity is zero, and the acceleration due to gravity is -9.8 m/s^2 (taking downward as negative). Therefore, the time taken to reach the maximum height is zero.

Now, we can use the equation for vertical displacement:

    Δy = (initial velocity * t) + (0.5 * acceleration * t^2)

Substituting the values, we get:

    Δy = (0 * 0) + (0.5 * -9.8 * 0^2)
=> Δy = 0

This means that the maximum height the ball will rise is 0 meters above the release point. The ball will reach the same level from where it was thrown, but not higher.

In conclusion, when Jean throws the ball straight upward, it will not rise to any height above the release point. It will only reach the same level as the release point.

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From the analysis, it can be concluded that planet A has the strongest gravitational field, followed by planet C, and planets B and D have the same gravitational field strength.

The gravitational force acting on various masses is measured on different planets. The table shows the measured values for the forces acting on the corresponding masses:Planet Force (N) Mass (kg)A 8.0 0.50B 30 3.0C 45 3.0D 60 6.0

Method for comparing the gravitational field strengths on the different planets:First, we can use the formula for calculating gravitational force: \(`F = G (m_1m_2 / r^2)`\)where G is the universal gravitational constant `\(6.67 * 10^{-11 }Nm^2/kg^2\), m1 and m2 are the masses of the two objects in kg, and r is the distance between the centers of the objects in meters.

We know that the force is proportional to mass (F = ma). So we can calculate the acceleration due to gravity (g) on each planet by dividing the force by the mass. Therefore, we can use the formula: `g = F / m`.

Comparing the gravitational field strengths on the different planets:We will calculate the acceleration due to gravity (g) on each planet.

For planet A: `

g = F / m

= 8.0 N / 0.50 kg

= 16 \(m/s^2\)`

For planet B: `g = F / m

= 30 N / 3.0 kg

= 10 \(m/s^2\)

For planet C: `g = F / m

= 45 N / 3.0 kg

= 15 \(m/s^2\)

For planet D: `g = F / m

= 60 N / 6.0 kg

= 10 \(m/s^2\)

`So we see that planet A has the strongest gravitational field, followed by planet C, then planet B and planet D have the same gravitational field strength.

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Answer:

10lbs on the moon

Explanation:

The given assertion 'In a series circuit, the current is constant throughout the electric circuit' is correct but the reason 'All electric devices need equal currents to operate properly' is incorrect.

A circuit is said to be connected in series when the same current flows through all the components in the circuit. The current in these circuits only travels along one route.

A higher total voltage is produced by series-connected cells than by single cells. Voltage increases if the number of cells increases. Series circuits do not overheat easily.

All the electrical devices do not require equal amount of current for their functioning. For example, an electric heater and an electric fan do not require the same amount of current.

In a series combination, if one component fails, all other components stop working.

Series connection is not suitable for domestic circuits.

Therefore, while the assertion is true, the reason is false.

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The ability of a measuring instrument to measure what it is supposed to measure is the basic purpose of validity. So, the correct answer is (b) validity.

Validity is a fundamental concept in research and measurement, and it refers to the degree to which a measurement tool accurately measures the construct it is intended to measure.

In contrast, reliability refers to the consistency and stability of the measurement over time.

Sensitivity refers to the ability of a measurement tool to detect small changes in the construct being measured.

Indexing refers to the process of creating an index or composite measure by combining multiple measures or indicators of a construct.

Thus, of the options given, the basic purpose of measuring instrument is to have validity.

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Answer:

Total resistance (Rt) =2

Explanation:

Rt=R1*R2/R1+R2

Rt=6*3/6+3

Rt=18/9

Rt=2

The 10-20 rule is a rule of thumb which states that the diameter of a crater formed by an impact event is roughly 10 times the diameter of the impacting object.

Object is a physical, tangible thing that can be seen and touched. It is an entity that has a physical presence in the real world. It can be an animal, a plant, a person, a place, an inanimate object, an idea, or any combination of these. Objects can also be abstract, such as an event or a concept. Object-oriented programming is a popular programming paradigm that is based on objects and their interactions. It involves creating classes, which are similar to blueprints, and then instantiating objects based on those classes.

Using this rule, the lower bound on the diameter of the resulting crater would be 10 km, assuming the diameter of the impacting object is 1 km. It is important to note, however, that this 10-20 rule is an approximation and that there are many factors that can affect the diameter of the resulting crater. For example, the angle of the impact, the angle of the surface of the target material, and the speed of the impacting object can all have an effect on the final crater size.

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In the case of uniform accelerated motion, the graph of velocity versus time is a straight line. Therefore, option C is correct.

When a body experiences an acceleration constantly for a period of time, the velocity of the body changes. If we draw a graph the velocity on the vertical axis and time on the horizontal axis. A straight line is drawn which indicates that the velocity is increasing or decreasing uniformly.

This velocity increases or decreases uniformly depending upon the equal intervals of time. The slope line indicates the acceleration of the object and it also indicates the change in velocity per unit of time.

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Answer:

In general solids are easier to transport than liquids, but the above metal example is a valid one and the only other one that comes to mind is that of concrete. It is mixed as a liquid and transported as such, but then sprayed or laid down to dry and form a solid surface or filler. 

Explanation:

The first equivalence point occur at volume 24.53 mL. The second equivalence point occur at 49.07mL

Define equivalence point.

When chemically equivalent amounts of reactants have been combined, the reaction has reached its equivalence point, also known as its stoichiometric point. The equivalency point in an acid-base reaction is the point at which the moles of acid and base would, in a chemical reaction, neutralize one another.

The titration's equivalence point is the point where just enough titrant is administered to totally neutralize the analyte solution. In an acid-base titration, the solution only comprises salt and water at the equivalence point, where moles of base equal moles of acid.

The first point of equivalence :

M x L = moles.

L=moles/0.1019

  = 0.0245 L =24.5 mL.

The first equivalence point occur at volume : 24.53 mL.

The second equivalence point occur at : 40.00 x 0.1250/0.1019 = 49.07mL

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Answer:

No force is more familiar than gravity — it's what keeps our feet on the ground, after all. And Einstein's theory of general relativity gives a mathematical formulation for gravity, describing it as a “warping” of space.

Explanation:

a) Velocity and acceleration of a car are parallel when the car is moving along a straight line in the same direction. For example, when a car is gaining speed as it moves forward in a straight line, both velocity and acceleration are directed in the same direction.

b) Velocity and acceleration of a car are anti-parallel when the car is moving along a straight line in the opposite direction. For example, when a car slows down while moving in a straight line, its acceleration is directed opposite to the direction of its velocity, or the other way around.

Answer:

a)

There is only one case where velocity and acceleration are parallel only when they are moving in the same direction.

b)

There are 3 cases where velocity and acceleration are antiparallel.

(i) When both are moving in different direction

   It means :

(ii) When the object is slowing down, where velocity and acceleration are in the opposite direction.

(iii) In case of motion reversal.

Explanation:

Answer:

The power rating of the coffee maker is 1.4 kW, which means that it uses 1.4 kilowatts of power when it is in operation. To find out how much energy it will transfer every second, we can use the formula:

Energy transferred = Power × Time

Since we want to know the energy transferred every second, we can set the time to 1 second. Therefore:

Energy transferred per second = Power × 1 second

Energy transferred per second = 1.4 kW × 1 second

We can simplify this by converting the unit of power from kilowatts to watts:

Energy transferred per second = 1,400 watts × 1 second

Energy transferred per second = 1,400 joules

Therefore, the coffee maker will transfer 1,400 joules of energy every second.

B. magnitude and direction.

When two forces of equal size are working in opposite directions—one in the east and one in the west—the results of the two pressures are not the same.Therefore, the magnitude and direction should be provided in order to accurately characterize a force.

We can define force as that of the push or pull on an item with a certain magnitude and direction as we know that what a push or a pull indeed has magnitude and direction (hence, it is vector quantity).

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Answer:

See the explanation below.

Explanation:

Solving the first image question:

C ) The resulting force is defined by Newton's second law which tells us that the sum of the forces on a body is equal to the product of mass by acceleration. That is, there must be a force that acts on a body to produce an acceleration. If there is no acceleration it is because there are no external forces or developed by the body. And if there is no acceleration the body moves at a constant speed, in a straight line, so the response is C.

For the second image, we must remember that weight is defined as the product of mass by gravitational acceleration.

W = m*g

where:

W = weight [N]

m = mass [kg]

g = gravity acceleration [m/s²]

Now we have

m = 50 [kg]

ge = Earth gravity acceleration = 10 [m/s²]

gp = Distant planet gravity acceleration = 4 [m/s²]

We = ge*m

We = 10*50 = 500 [N]

Wp =gp*m

Wp = 4*50 = 200 [N]

Therefore the answer is D

For the third image, The mass is always going to be preserved, regardless of where the body or object is in space, its weight is the only one that changes since the gravitational force is modified. That is, the mass on the moon and on Earth will always be the same.

m = 70 [kg]

First, we must calculate the acceleration, by means of the following equation of kinematics.

\(v_{f} =v_{o} +a*t\)

where:

Vf = final velocity = 20 [m/s]

Vo = initial velocity = 0 (because stars from the rest)

a = acceleration [m/s²]

t = time = 4 [s]

20 = 0 + a*4

20 = 4*a

a = 5 [m/s²]

Now using Newton's second law which tells us that the total force acting on a body is equal to the product of mass by acceleration.

F = m*a

where:

F = force [N] (units of Newtons)

m = mass = 2 [kg]

a = acceleration = 5 [m/s²]

F = 2*5

F = 10 [N]

The body of Figure D, since a total force of 25 [N] to the left acts on it, in the rest of cases the force is zero or much less than 25 [N]

50 + 40 - 35 - 30 = F

F = 25 [N]

Answer:

the prosecution of a person twice for the same offense.

Answer:

The graph would increase constantly as shown above until it reached 50m/s. At 10s, the graph would be flat at 50m/s until 20s.

Explanation:

Answer:

Cycloheptatriene

Explanation:

Answer:

Cycloheptatriene or Toluene

Explanation:

I hope this helps!

You are standing 1.08 m away from the mirror.

When you stand in front of a flat mirror, the distance between you and your image in the mirror is twice the distance from you to the mirror. Therefore, the distance between you and the mirror is half of the camera's focus distance.

If the camera is in focus when set for a distance of 2.16 m, then the distance between the camera and the mirror is 2.16 m. Therefore, the distance between you and the mirror is:

distance to mirror = (1/2) x 2.16 m

distance to mirror = 1.08 m

So you are standing 1.08 m away from the mirror.

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