1 ) Starting from rest, a toy rocket accelerates at 12 m/sec/sec for exactly 4.0 seconds. It reaches 48 m/sec. Find the distance moved.

Answer:

Explanation:

percentage yield

The actual yield of a reaction can be compared with the maximum theoretical yield to calculate the percent yield of a reaction.

The theoretical yield is the maximum amount of product that could be obtained from the reaction under ideal conditions. The actual yield is the actual amount of product that was obtained from the reaction.

The actual yield of a reaction can be compared with the maximum theoretical yield to calculate the percent yield of a reaction. The percent yield is a measure of the efficiency of a chemical reaction and is calculated as follows:
Percent yield = (actual yield / theoretical yield) × 100

By comparing the two, the percent yield gives an indication of how well the reaction actually performed in comparison to the ideal conditions. A high percent yield indicates that the reaction was efficient and close to ideal conditions, while a low percent yield indicates that the reaction was less efficient and not close to ideal conditions.

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Answer:

C. Both a and b

Explanation:

Firstly, persons and objects in a moving plane as described in this question, are moving at the same speed as the plane even if there is no individual movement of these objects.

However, this question describes a person sitting still in a moving plane. This means that;

- The person is motionless in relation to everything in the plane i.e the person is not moving even if other things in the plane are.

- The person is in motion compared to everything on the ground i.e. the person is moving at the same speed as the plane, hence, in comparison with the ground, the person is moving.

Therefore, options A and B are correct

The equation for conservation of energy with friction is PEi + KEi + Wfriction = PEf + KEf.

Friction is a force that resists the relative motion of two surfaces that are in contact with each other. It is a force that works to oppose motion between two surfaces and is created when two objects rub against each other. Friction is the result of two surfaces interacting and the electrons of each surface reacting with the other. The rougher the surfaces, the more friction is generated. Friction can cause objects to heat up, slow down, or even stop.

The equation for conservation of energy states that the total energy of a system must remain constant. Friction is a form of energy, so it must be taken into account in the equation. In this case, the equation is modified to include the work done by friction (Wfriction) on the system. Thus, the equation for conservation of energy with friction is PEi + KEi + Wfriction = PEf + KEf.

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Answer:

v_f = 3 m/s

Explanation:

From work energy theorem;

W = K_f - K_i

Where;

K_f is final kinetic energy

K_i is initial kinetic energy

W is work done

K_f = ½mv_f²

K_i = ½mv_i²

Where v_f and v_i are final and initial velocities respectively

Thus;

W = ½mv_f² - ½mv_i²

We are given;

W = 150 J

m = 60 kg

v_i = 2 m/s

Thus;

150 = ½×60(v_f² - 2²)

150 = 30(v_f² - 4)

(v_f² - 4) = 150/30

(v_f² - 4) = 5

v_f² = 5 + 4

v_f² = 9

v_f = √9

v_f = 3 m/s

Answer:

neither

Explanation:

they both suck :)

Have a great day

Answer:

Both of them

Explanation:

They are both better you can't choose because its like parents choosing who is their favorite child.

The expected result of the experiment is that the liquid air will boil because the extreme difference in temperature will cause heat to be transferred from the ice to the liquid air ( B ).

The temperature of the liquid air = - 200 °C

The temperature of the block of ice = - 12 °C

Since they are in a thermally insulated flask, the heat will be transferred until both the objects' temperature becomes equal. So the temperature of liquid air rises and the temperature of ice decreases. The boiling point of liquid air is - 194.35 °C. So the liquid air boils.

Option A would have been correct if the final statement was decrease in temperature and not increase in temperature. Option C is incorrect because the ice becomes colder. Option D is incorrect because liquid air will boil.

Therefore, the expected result of the experiment is that the liquid air will boil because the extreme difference in temperature will cause heat to be transferred from the ice to the liquid air and the molecules of the liquid air will begin to leave the liquid ( B ).

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Answer:

It is in contact with two vertical rails which are joined at the top. The rails are without friction and resistance. There is a horizontal uniform magnetic field of magnitude B perpendicular to the plane of the ring and the rails.

Explanation:

Not sure if this is correct but pls give thanks anyway!

Answer:

Because they don't have a telescope to magnify so close

Explanation:

Hope it works for you :)

Answer:

scientists can't see inside a atom because the atoms cant be seen by anything                      hope it help :)

Explanation:

For a current is passing through a straight wire, the Magnetic field is mathematically given as,

B=5.535*10^5T.

Generally, the equation for the Magnetic field  is mathematically given as

\(B=\frac{\mu i}{ 2 \pi r}\)

Therefore

\(B=\frac{4 \pi *10^{-7}*4.2.28}{2 \pi (1.6*10^-2)}\)

B=5.535*10^5T

In conclusion, the magnetic field

B=5.535*10^5T

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Answer: 18 years of age

Explanation:

The law that describes the relationship between the pressure and volume of a gas in a sealed container is Boyle's law.

Boyle's Law, formulated by the Irish scientist Robert Boyle in the 17th century, describes the relationship between the pressure and volume of a gas at a constant temperature. It states that the pressure of a gas is inversely proportional to its volume when the temperature remains constant.

According to Boyle's law, when the pressure of a gas is cut in half, the volume of the gas will double, as long as the temperature remains constant. This means that if you decrease the pressure exerted on a gas by half, the volume of the gas will increase by a factor of two.

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When a light ray travels parallel to the principal axis of a curved mirror, the ray will not be reflected back in the opposite direction like in the case of a flat mirror.

The reason why this does not occur is  because the surface of a curved mirror is not a flat surface and it has a varying curvature, which causes the reflected rays to behave differently compared to the flat mirror.

In the case of a concave mirror, when a light ray travels parallel to the principal axis and strikes the mirror, it is reflected back towards the focus of the mirror. This is because the concave mirror surface curves inward, causing the reflected light rays to converge towards the focus.

In the case of a convex mirror, when a light ray travels parallel to the principal axis and strikes the mirror, it is reflected back in a direction away from the focus of the mirror. This is because the convex mirror surface curves outward, causing the reflected light rays to diverge away from the focus.

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The force exerted by the fire hose is 2.827 kN

First, we need to calculate the area of the jet using the formula for the area of a circle:

Area = π x (radius)^2

We know the diameter of the jet is 0.6m, so the radius is half of that

radius = 0.6m / 2 = 0.3m

Plugging this value into the formula, we get:

Area = π x (0.3m)^2 = 0.2827 m^2

Next, we can use the formula for pressure to calculate the force exerted:

Pressure = Force / Area

Rearranging this formula to solve for force, we get:

Force = Pressure x Area

Plugging in the given values, we get:

Force = 10 kPa x 0.2827 m^2 = 2.827 kN

Therefore, the force exerted by the fire hose is 2.827 kN (kilonewtons).

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If we push other person with a force, he or she can exerts an equal and opposite force. If the force is unbalanced, then the displacement will occur in the direction of greater force.

Force is an external agent acting on a body to change its motion or to deform it. The net force acting on a body depends on the magnitude and direction of all the forces acting on it.

According to Newton's third law of motion for every action there is an equal and opposite reaction. Therefore, the force exerted on anything is accompanied by an equal and opposite force.

If we push another person with a force, then the they can exerts an equal force in opposite direction. If the force in any direction dominates, the displacement occurs in that direction.

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The force which is exerted by an object that is submerged in a fluid can be calculated using the equation of buoyant force:

Fb = ρf * V * g

where:

Fb = buoyant force

ρf = density of the fluid (1025 kg/m3 for salt water)

V = volume of the object

g = acceleration due to gravity (9.8 m/s^2)

As the density of the grouper (1015 kg/m3) is less than the density of the fluid (1025 kg/m3), the following object will experience an upward buoyant force.

So to stay submerged, the grouper must exert a force which is equal to the buoyant force in the opposite direction, that is downward.

Therefore, to find the volume of the grouper:

V = m / ρb

where:

m = 97.5 kg (mass of the grouper)

ρb = 1015 kg/m3 (density of the grouper)

Substituting the values into the equation:

V = 97.5 kg / 1015 kg/m3 = 0.096 m^3

Next, calculating the buoyant force:

Fb = ρf * V * g

= 1025 kg/m3 * 0.096 m^3 * 9.8 m/s^2

= 967.68 N

The magnitude of the force the grouper must exert to stay submerged is equal to the buoyant force:

F = 967.68 N

So, the grouper must exert a force of 967.68 N to stay submerged in salt water.

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Digital filters are important in digital signal processing. FIR and IIR filters are two types of digital filters. The main difference between FIR and IIR filters is that FIR filters are known as non-recursive filters, while IIR filters are recursive filters. In this answer, we will explore more about the differences between FIR and IIR filters.

FIR Filters FIR stands for finite impulse response. FIR filters are also called non-recursive filters. In an FIR filter, the output depends only on the current input and the previous inputs. FIR filters are also known as moving average filters. FIR filters have a linear phase response, which makes them useful in audio and image processing. FIR filters have more stable responses compared to IIR filters, which means they are more predictable.

IIR filters are more efficient than FIR filters because they use feedback loops. IIR filters have nonlinear phase responses, which make them useful in signal processing and control systems. IIR filters are less stable than FIR filters, which means they are less predictable.

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No , frequency of a wave is not distance between waves, it is called wavelength.

Frequency is the number of waves that pass a particular point in a given period of time. It is typically measured in Hertz (Hz), which is the number of waves per second. Wavelength, on the other hand, is the distance between two consecutive crests or troughs of a wave. It is typically measured in meters (m). So frequency and wavelength are related, but they are not the same thing. Frequency is a measure of the number of waves, while wavelength is a measure of the distance between waves.

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Answer:

Harmful bacteria are called pathogenic

Explanation:

Harmful bacteria are called pathogenic bacteria because they cause disease and illnesses like strep throat, staph infections, cholera, tuberculosis, and food poisoning.

Answer:

The baseball was falling during 1.733 seconds.

Explanation:

The baseball experimented a free fall, which is a particular case of uniformly accelerated motion, in which object is accelerated by gravity. In this case, we need to determine the time spent by the ball before hitting the ground (\(t\)), measured in seconds, which is determined by the following kinematic formula:

\(t = \frac{v-v_{o}}{g}\) (1)

Where:

\(v_{o}\), \(v\) - Initial and final speeds of the baseball, measured in meters per second.

\(g\) - Gravitational acceleration, measured in meters per square second.

If we know that \(v_{o} = 0\,\frac{m}{s}\), \(v = 17\,\frac{m}{s}\) and \(g = 9.807\,\frac{m}{s^{2}}\), then the time spent by the baseball is:

\(t = \frac{17\,\frac{m}{s}-0\,\frac{m}{s} }{9.807\,\frac{m}{s^{2}} }\)

\(t = 1.733\,s\)

The baseball was falling during 1.733 seconds.

The speed of the roller coaster at point E is 40 m/s.

The speed of the roller coaster at point F is 49 m/s.

The speed of the roller coaster at point E is calculated by applying the following formula as shown below.

v = √ ( 2gΔh )

where;

At point E, the change in height of the coaster, Δh  = 120 m - 40 m = 80 m

v = √ ( 2gΔh )

v = √ ( 2 x 10 x 80 )

v = 40 m/s

At point F, the change in height of the coaster, Δh  = 120 m - 0 m = 120 m

v = √ ( 2gΔh )

v = √ ( 2 x 10 x 120 )

V = 49 m/s

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The uniform current density in the wire is 5.43 x 10²⁷ A/m².

The uniform current density in the wire is calculated as follows;

J = total current / total area

The given parameters:

\(J = \frac{I}{A} = \frac{Q}{At} \\\\J = \frac{8.49 \times 10^{28}e/m^3 \ \times \ 1.6 \times 10^{-19} \ C/e}{2.5 \times 10^{-14} \ s \ \times ( 0.1 \times 10^{-3} \ V/m)} \\\\J = 5.43 \times 10^{27} \ A/m^2\)

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The answer is C: static-active stretching

Answer:

Below

Explanation:

To convert mm to m all you need to do is divide the value by 1,000

so : 3 / 1,000 = 0.003 meters

Hope this helped!

The cooking smoker works by the convection type of heat transfer to cook the meats.

A cooking smoker is a useful device used for cooking meats, and it works by the convection type of heat transfer.

This smoker works by allowing the warm air filled with smoke to rise to the meat, while the cooler air sinks closer to the fire.

In the convection type of heat transfer, the transfer of heat energy between a surface and a fluid, either liquid or gas, that is in motion. It results in the heating up of the fluid by the hot surface.

This then makes the hot fluid rise and the cooler fluid sink, thus resulting in the transfer of heat energy.In the smoker, heat transfer is dependent on convection currents.

As the fire burns, the smoke heats up and is then carried through the smoker to the meat.

The heat then begins to transfer from the smoke to the meat surface by means of convection, thereby cooking the meat with a smoky flavor.

Summary:The cooking smoker works by the convection type of heat transfer to cook the meats. In convection type heat transfer, heat energy is transferred between a surface and a fluid in motion. The smoker's heat transfer is dependent on convection currents. The heat transfers from the smoke to the meat surface by means of convection, thereby cooking the meat with a smoky flavor.

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There are 125 neutrons in an ion of lead 207.

The number of neutrons in an ion can be calculated by subtracting the atomic number (number of protons) from the mass number (number of protons and neutrons).

From a periodic table, we can know that lead has an atomic number of 82. Lead 207 also means that it has a mass of 207. Based on this information, we can calculate the atom's mass number, atomic number, and neutron number by the following formula:

  mass number - atomic number = number of neutron

  207 - 82 = 125

Therefore, an ion of lead 207 has a number of neutrons of 125.

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COGS stands for Cost of Goods Sold. It represents the direct costs incurred in producing or acquiring the goods or services that a company sells to generate revenue. It includes the cost of raw materials, direct labor, and manufacturing overhead directly associated with the production process. For example, in a bakery, the cost of flour, sugar, and other ingredients, as well as the wages of the bakers involved in producing the bread, would be part of the COGS.

OH stands for Overhead. It refers to indirect costs incurred in the production process that cannot be directly attributed to a specific product or service. Examples of overhead costs include rent, utilities, salaries of administrative staff, and depreciation of equipment.

PP&E stands for Property, Plant, and Equipment. It represents the long-term tangible assets that a company uses in its operations. Examples include buildings, machinery, vehicles, and land. These assets are not easily converted into cash and are expected to be used over multiple accounting periods.

The J-curve is a graphical representation that shows the initial negative impact of an investment or policy change followed by a positive effect over time. It forms a shape resembling the letter "J" on a graph. The curve indicates that in the early stages, there may be a decline or negative impact, but as time progresses, the situation improves and leads to positive results. It is often used to illustrate the short-term costs or losses associated with investments before they generate positive returns in the long run.

The 3 F's refer to the three fundamental financial statements: the Income Statement, the Balance Sheet, and the Cash Flow Statement. These statements provide essential information about a company's financial performance, position, and cash flows. The Income Statement shows revenue, expenses, and net income or loss over a specific period. The Balance Sheet presents the company's assets, liabilities, and equity at a given point in time. The Cash Flow Statement provides information on the cash inflows and outflows, including operating activities, investing activities, and financing activities.

CULT stands for Customers, Understanding, Learning, and Teaching. It is a customer-centric approach to business that focuses on building strong relationships with customers by understanding their needs, continuously learning from them, and effectively communicating and teaching them about products or services. This approach aims to create loyal customers who not only make repeat purchases but also become advocates for the brand. Examples of CULT practices include conducting customer surveys, personalizing marketing messages, offering educational resources, and providing exceptional customer service.

In finance, Beta represents the measure of a stock's or investment's volatility in relation to the overall market. It measures the sensitivity of an asset's returns to changes in the market. A Beta of 1 indicates that the asset's price moves in line with the market. A Beta greater than 1 suggests higher volatility compared to the market, while a Beta less than 1 indicates lower volatility. For example, a Beta of 1.5 implies that the asset is expected to be 50% more volatile than the market.

The Break-Even graph is a graphical representation that shows the point at which total revenue equals total costs, resulting in zero profit or loss. It helps determine the level of sales or production volume needed to cover all fixed and variable costs. The graph plots the total revenue and total cost curves on the same axis. The break-even point is the intersection of these two curves. Below the break-even point, the company incurs a loss, while above the break-even point, it generates a profit. The graph visually illustrates the relationship between costs, revenue, and profit at different levels of output or sales.

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Answer:

Explanation:

distance = speed * time  

distance = 21000 * 5 = 105000 km

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