A helicopter is accelerating up into the air while it is also accelerating due north. Which statement about the forces acting on the helicopter is true?

Answer:Two dimensional forms can create the illusion of 3 dimensional shapes and spaces.

Explanation:

Answer:

qeyygrydfguygffsddtggfxccfufdrfff

if the string is released at the instant the ball is at the top of the loop, 139.23 cm far to the right does the ball hit the ground.

A minimum velocity is present at a position where acceleration is both negative to the left and positive to the right.

At the minimum velocity at the top v, the weight mg provides the centripetal acceleration -

R = 50 cm = 0.5 m

Thus, mv²/R = mg

or, v² = Rg

or, v = v Rg

or, v = v × 0.50 x 9.8

or, v =v × 4.9

or, v = 2.21 m/s

The ball goes off horizontally at this speed and falls through a height

y = h + R

or, y = 150 + 50

or, y = 200 cm

or, y = 2 m

Using y = 0 + 0.5g.t2

or, t = v (2.y/g)

or, t = v [2 x 2/9.8]

or, t = 0.63 s

The horizontal distance travelled, x = v.t

x = 2.21 x 0.63

x = 1.3923 m

x = 139.23 cm.

If the string is released at the instant the ball is at the top of the loop, 139.23 cm far to the right does the ball hit the ground.

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The mass flow rate of the pump is 2.8 kg/s.

Given the density of the oil (kerosene) to be ρ= 0.75 kg/L

The volume of oil is equal to 10,000 L1 L = 0.001 m³Volume of oil = 10,000 × 0.001 = 10 m³Density of oil = mass/volume ⇒ mass = density × volume

Let m be the mass of oil.

m = ρV = 0.75 × 10 = 7.5 kg

The time taken to empty the tank is 45 minutes. 1 minute = 60 seconds

The time taken is t = 45 × 60 = 2,700 seconds.

Let the mass flow rate be m′. The mass flow rate is defined as the mass of fluid flowing per unit time.m′ = m/t = 7.5/2,700 kg/s= 0.00278 kg/s

Therefore, the mass flow rate of the pump is 2.8 kg/s.

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Because of the reduced air density, an aeroplane flying at the same mach number at 34,000 ft height will fly slower than at a lower altitude. The actual speed differential is determined by the temperature at each height.

1. As altitude increases, air density falls, affecting aircraft performance.

2. Mach number is an independent of air density assessment of an aircraft's speed relative to the speed of sound.

3. However, the speed of sound changes with altitude owing to temperature variations.

4. The speed of sound at 34,000 feet is roughly 660 knots (761 mph).

5. At sea level, an aircraft flying at Mach 0.8 has a speed of around 614 knots (707 mph).

6. Due to the reduced air density, if the same aircraft were flying at Mach 0.8 at 34,000 feet, its speed would be less than 614 knots.

7. The exact speed differential is determined by the temperature at each height.

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Two moles of oxygen contain 1.2044 ×10²⁴ oxygen atoms.

The mole, which is denoted by the symbol "mol," is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

number of mole of O₂= 2 mole

number of atoms/molecules=number of moles × 6.022×10²³(Avogadro number)

substituting all the given values in the above equation, we get

number of  oxygen atoms = 2 × 6.022 × 10²³

number of oxygen atoms= 1.2044 ×10²⁴ oxygen atoms.

Therefore,  1.2044 ×10²⁴ oxygen atoms are there in a 2 moles of oxygen atoms.

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Answer:

every four hours

Explanation:

Hot and Cold Holding of Potentially Hazardous Foods

When a source of heat is available, hold hot foods at 135 degrees Fahrenheit or higher and check the temperature every four hours. If the temperature of the food at four hours is less than 135 degrees Fahrenheit, the food must be discarded.

Answer:

I suggest that you recheck your answers multiple times and make sure that they are making sense. Also I think that you should Study the organisms very well and you should be careful when making observations so that you really are sure that the organism has 4 wings and not only 2 wings(for example).

Explanation:

I hope this answers your question  

PLEASE MARK ME BRAINLIEST :)  :)  :)  :)  :)

Answer:

The energy conversion goes from chemical energy stored in the fuels to heat energy as it burns which is converted to kinetic energy as it drives large turbines and finally this is converted to electrical energy. The problem with burning fossil fuels is their effect on the environment.

When a body falls, its potential energy gradually gets converted into kinetic energy. On reaching the ground, the whole of the potential energy of the body gets converted into kinetic energy.

Energy gained from burning fossil fuels is converted to electricity and heat in commercial power plants. When fossil fuels are burned carbon and hydrogen react with oxygen in air to carbon dioxide (CO2) and water (H2O).

The energy conversion process begins with chemical energy contained in the fuels, which is turned to heat energy as it burns, which is then transferred to kinetic energy as it powers massive turbines, and lastly to electrical energy. The issue with using fossil fuels is their environmental impact.

The decay of buried carbon-based creatures that died millions of years ago produces fossil fuels. They produce carbon-rich deposits, which are mined and burnt to generate energy.

The chemical energy held in fossil fuels such as coal, fuel oil, natural gas, or oil shale, as well as oxygen from the air, is turned into thermal energy, mechanical energy, and, eventually, electrical energy in a fossil fuel power plant.

In commercial power plants, the energy obtained from the combustion of fossil fuels is transformed to electricity and heat.

When carbon and hydrogen in fossil fuels are burnt, they react with oxygen in the air to produce carbon dioxide (CO2) and water (H2O).

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Answer: 120 km per hour.

Explanation: 300/2.5 = 120.

a) The null and alternative hypotheses can be stated as follows:

H0: The mean body temperature of a healthy adult is 98.6 °F.

H1: The mean body temperature of a healthy adult is not 98.6 °F.

b) The appropriate significance level is given as 0.10, which corresponds to a 10% significance level.

c) To perform the hypothesis test, we can use the t-test since the population standard deviation is unknown. The test statistic can be calculated using the formula:

t = (sample mean - hypothesized mean) / (sample standard deviation / √n)

where the sample mean is 98.24 °F, the hypothesized mean is 98.6 °F, the sample standard deviation is 0.92 °F, and n is the sample size, which is 35 in this case.

Substituting these values into the formula, we get:

t = (98.24 - 98.6) / (0.92 / √35)

t = -0.36 / (0.92 / √35)

t = -0.36 / (0.92 / 5.92)

t ≈ -0.36 / 0.155

t ≈ -2.32 (rounded to two decimal places)

d) The test statistic is approximately -2.32.

e) To calculate the p-value, we need to determine the probability of obtaining a test statistic as extreme as -2.32 (in either tail) assuming the null hypothesis is true. Since we have a two-tailed test, we need to calculate the area under the t-distribution curve beyond -2.32 in the left tail and beyond 2.32 in the right tail.

Looking up the p-value corresponding to -2.32 (or the closest value) in the t-distribution table or using statistical software, we find that the p-value is approximately 0.0257.

Therefore, the p-value is approximately 0.0257 (rounded to four decimal places).

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The jogger's speed was indeed 4 m/s, as speed is the distance traveled divided by time (400m / 100s = 4 m/s).

However, velocity is a vector quantity that includes both magnitude and direction. Since the jogger completed a lap and returned to the starting point, their overall displacement is zero, resulting in a velocity of 0 m/s. So, the first friend is incorrect in stating that the velocity was 4 m/s.

The second friend is correct. Velocity is a vector quantity that includes both speed and direction, whereas speed is a scalar quantity that only indicates how fast something is moving. Since the question does not provide any information about the direction of the jogger's movement, it is not possible to determine their velocity. However, based on the given information, the jogger's speed can be calculated as distance divided by time, which is 4 m/s (400 m divided by 100 s).

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Answer:

Fossil fuels come from dead animals and dead plants from millions years ago.

I hope I helped.

Answer:

y5

Explanation:

The magnetic force is perpendicular to the velocity and the magnetic field. The direction of the magnetic force can be determined using the right-hand rule, putting the fingers of the right hand in the direction of the velocity and curl your fingers or roll them in the direction of the magnetic field. The thumb gives the direction of the magnetic force. If the charge is negative, the direction of the force is opposite to the result obtained using the right-hand rule.

The direction of a moving charge's magnetic field lines is always perpendicular to the plane created by velocity and magnetic force.

If the positive charge is moving upwards the corresponding current is also upwards, the magnetic field is towards the south.

"Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. It is the basic force responsible for such effects as the action of electric motors and the attraction of magnets for iron."

"The magnetic field is the area around a magnet in which the effect of magnetism is felt. We use the magnetic field as a tool to describe how the magnetic force is distributed in the space around and within something magnetic in nature."

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The oxidation state of an individual phosphorus atom in PO₄³⁻ is +5

The oxidation state of an individual phosphorus atom in PO₄³⁻ is +5. The formula of phosphate ion is PO₄³⁻. It is an anion that is made up of one central phosphorus atom with four oxygen atoms connected to it.

The total charge of the ion is 3-, implying that each of the four oxygen atoms has a charge of 2- while the phosphorus atom has a charge of 5+.The oxidation state of an atom is a measure of its degree of oxidation, with negative numbers indicating that an atom has gained electrons and positive numbers indicating that it has lost electrons. The oxidation state of an atom in its uncombined elemental state is zero; for example, the oxidation state of copper in metallic copper is zero.

Phosphorus is an element that may form five oxides: P₄O₆, P₄O₇, P₄O₈, P₄O₉, and P₄O₁₀. The oxidation state of an individual phosphorus atom in these oxides ranges from +3 to +5. Because each of the four oxygen atoms has a charge of -2, the four oxygen atoms together contribute a total charge of -8 to the ion. In order to make the ion neutral, the phosphorus atom must have a charge of +5.

The oxidation state of an individual phosphorus atom in PO₄³⁻ is +5. The charge on the four oxygen atoms that make up the phosphate ion is -8, which necessitates a charge of +5 on the phosphorus atom in order for the ion to be neutral.

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Answer:

the reaserch I have says that thermal pollution

Answer:

The answer is C

Explanation:

Testable meaning experiments can be conducted to support or refute the hypothesis. This is done through data.

Answer:

When an object moves in a straight line at a steady speed, we can calculate its speed if we know how far it travels and how long it takes. This equation shows the relationship between speed, distance traveled and time taken: Speed is distance divided by the time taken.

Explanation:

Thats what goog.le said so if its wrong blame G O O G L E

Answer:

41.578N

Explanation:

Answer:

YOUR ANSWER IS HERE....

Answer:

true :D

Explanation:

ANSWER

False.

EXPLANATION

In radioactive decay (or nuclei decay), an unstable nucleus emits radiation into a nucleus that is table and has less energy and a lower mass.

Therefore, nuclei decay from a less stable form to a more stable form.

The answer is false.

The energy of a photon with a frequency of 4.89 x 10^16 Hz is approximately 3.24 x 10^-17 Joules.

Frequency refers to the number of cycles or oscillations of a wave that occur in a given time period. It is a measure of how frequently a wave completes one full cycle. In the context of electromagnetic waves, such as light, frequency is typically measured in hertz (Hz), which represents the number of cycles per second.

The energy of a photon can be calculated using the equation:

E = h * f

where E is the energy of the photon, h is the Planck's constant (6.626 x 10^-34 J·s), and f is the frequency of the photon.

Plugging in the given frequency of 4.89 x 10^16 Hz into the equation, we have:

E = (6.626 x 10^-34 J·s) * (4.89 x 10^16 Hz)

Calculating the product, we find:

E ≈ 3.24 x 10^-17 Joules

Therefore, the energy of a photon with a frequency of 4.89 x 10^16 Hz is approximately 3.24 x 10^-17 Joules.

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Determination of the change in enthalpy ΔH during this transformation. Take 75.5

molK . entropy (ΔS) is given by,ΔS = q/T For isothermal expansion,ΔS = q/T _hot= 10/873ΔS = 0.0115 KJ/K.

1. Compute the efficiency of the engine: Given, Hot reservoir temperature =  T_ hot = 600°C = 873 K Cold reservoir temperature =  T_ cold = 25°C = 298 K Efficiency (η) of the Carnot engine is given by,η = 1 - T_cold/T_hotη = 1 - 298/873η = 0.658 = 65.8%2. The heat transferred to the cooling reservoir :Given, q1 = 10 kJ From the Carnot cycle, Heat absorbed by the engine, q1 = q2q2 = q1 = 10 kJ Heat rejected to the cooling reservoir, q3 = q4q3/q1 = T_ cold/(T_ hot - T_ cold)q3/10 = 298/(873 - 298)q3 = 2.32 kJ3. The change in entropy of the system during just the heating step: The change in entropy (ΔS) is given by,ΔS = q/T For isothermal expansion,ΔS = q/T_ hot= 10/873ΔS = 0.0115 KJ/K

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Elnora Stuart and her colleagues conducted a study where they paired slides of pleasant scenes with toothpaste. This study aimed to investigate the effect of visual stimuli on the perception of toothpaste flavor. The participants were asked to taste and rate the toothpaste before and after viewing the pleasant scenes.

The results showed that the participants rated the toothpaste as more pleasant after viewing the pleasant scenes. The researchers concluded that visual stimuli can influence the perception of taste.

It is interesting to note that Elnora Stuart was a pioneer in the field of sensory evaluation. She was one of the first researchers to explore the link between sensory perception and consumer behavior. Her work has contributed significantly to the development of modern sensory evaluation methods.

In conclusion, Elnora Stuart and her colleagues paired slides of pleasant scenes with toothpaste to investigate the effect of visual stimuli on the perception of toothpaste flavor. The results of their study showed that visual stimuli can influence the perception of taste. Elnora Stuart's pioneering work in the field of sensory evaluation has greatly contributed to our understanding of how sensory perception affects consumer behavior.
Elnora Stuart and colleagues conducted a study in which they paired slides of pleasant scenes with different products to understand their impact on consumer perception. In this case, the correct answer is c. toothpaste. So, the complete sentence would be: Elnora Stuart and colleagues paired slides of pleasant scenes with toothpaste. This research helps us understand the effectiveness of using positive imagery in advertising and marketing campaigns.

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Answer:

The weight of heart of a human is 0.93 lbs.

Explanation:

Given that,

Approximately weight of heart is 0.5 % of the total body weight.

Weight of human = 185 lbs

Let the the weight of total body is w and weight of heart is \(w_{h}\).

We need to calculate the weight of heart of a human

Using given data

\(w_{h}=0.5\times w\)

Where, h = weight of heart

w = weight of human

\(w_{h}=\dfrac{0.5}{100}\times 185\)

\(w_{h}=0.93\ lbs\)

Hence, The weight of heart of a human is 0.93 lbs.