An airplane has a lift-todrag ratio of 15. it is at an altitude of 1500 (4921 ft) when the engine fails. an airport is 16 km (9.94 mi) ahead. will the pilot be able to glide far enough to reach it?

Answer:

D.Oxygen has five valence electrons

Answer:

66.5 is the answer

At a pH of 5.00, which is lower than the pKa of the histidine (His) side chain, the average His side chain is Positively charged. The correct option is D.

The typical histidine (His) side chain is projected to be positively charged at a pH of 5.00.

The histidine side chain has a pKa of 6.00, indicating that at a pH lower than the pKa, the side chain will be protonated and have a positive charge.

Because the pH is lower than the pKa in this scenario, the histidine side chain will be protonated.

This occurs because there is an abundance of hydrogen ions in the solution at lower pH levels, and these ions can attach to the histidine side chain, resulting in a positive charge.

As a result, with a pH of 5.00, the average histidine side chain should be positively charged.

Thus, the correct option is D.

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Your question seems incomplete, the probable complete question is:

The p k a of the histidine (his) side chain is 6.00 . at a ph of 5.00 , the average his side chain is:_________

A. Negatively charged

B. Uncharged

C. Partially protonated

D. Positively charged

The measure of central tendency that should be used to calculate the cutoff time for the final race is the median.

Option C.

The median is the middle point in a dataset—half of the data points are smaller than the median and half of the data points are larger.

To find the median: Arrange the data points from smallest to largest. If the number of data points is odd, the median is the middle data point in the list.

So from the given data of the 100 meter dash, the measure of central tendency that should be used to calculate the cutoff time for the final race is the median.

The median will help to separate half of the data points that are smaller than the cutoff time and half of the data points are larger than the cutoff time.

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Answer:

Explanation:

The area of the floor covered by his both feet can be found by using the formula

\(a = \frac{f}{p} \\ \)

f is the force

p is the pressure

From the question we have

\(a = \frac{400}{400} = 1 \\ \)

We have the final answer as

Hope this helps you

The winding density of the solenoid is approximately 1881 turns per meter.

To calculate the winding density of the solenoid, we need to determine the total number of turns in the solenoid per unit length.

The energy stored in a solenoid can be expressed as:

    E = (1/2) * μ₀ * n² * A * I² * L,

where:

      n² = (2E) / (μ₀ * A * I² * L)

      n = √((2E) / (μ₀ * A * I² * L))

n = √((2 * 6.00 × 10⁻⁶ J) / (4π × 10⁻⁷ T·m/A * π * (0.050 m)² * (0.400 A)²

* 0.700 m))

       n = √((2 * 6.00 × 10⁻⁶) / (4π × 10⁻⁷ * 0.050² * 0.400² * 0.700))

         n ≈ 1881  turns/m

Therefore, the winding density of the solenoid is approximately 1881  turns per meter.

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Answer: 0.28 A

Explanation:

Light will reflect at the same angle off a smooth surface as when it first touches it. The direction of reflected light beams for a flat surface is the same. Specular reflection is what is happening here.

When light reflects off of a surface, it happens. Light will reflect at the same angle it was incident upon if the surface is glossy and smooth.

A smooth polished surface is what is referred to as a reflection when a light ray strikes it and bounces back. Surface reflection occurs when a light beam hits it and then leaves it.

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Answer: The part of color that's reflected is the red that bounces off the paper.

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Answer:

Range is 57.723 m

Explanation:

- From first newton's equation of motion;

\({ \boxed{ \pmb{v = u + gt} }}\)

At maximum height reached; v = 0 [vertical motion], g is negative because velocity decreases as height is increasing

\({ \tt{v = u + gt}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ { \tt{0 = u \sin( \theta) + ( - g)t}} \\ { \tt{u \sin( \theta) = gt }} \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ { \tt{t = \frac{u \sin( \theta) }{g} }} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \)

- Therefore, to get total time of flight, T;

\({ \tt{T = \frac{2u \sin( \theta) }{g} }} \\ \)

- For horizontal motion; g = 0. Consider second equation of motion;

\({ \tt{s = ut + \frac{1}{2} {gt}^{2} }} \\ \)

Let range be R

\({ \tt{R = uT + \frac{1}{2} (0)T}} \\ \\ { \tt{R = uT}} \\ \\ { \boxed{ \tt{R = \frac{2 {u}^{2} \sin( \theta) }{g} }}}\)

- Above is the formular of finding range;

From the question, u = 20 m/s and theta = 45°

\({ \tt{R = \frac{2(20) {}^{2} \sin(45 \degree) }{9.8} }} \\ \\ { \tt{R = \frac{400 \sqrt{2} }{9.8} }} \\ \\ { \tt{R = 57.723 \: m}}\)

Yes, the hotter block has more energy inside. This is due to the fact that the materials of the two blocks have different heat capacities. Heat capacity is the amount of heat energy that must be added to a material to increase its temperature by 1°C. Generally speaking, materials with higher heat capacities will require more heat to raise their temperature by 1°C than materials with lower heat capacities.

For example, if two blocks, one made of iron and one made of aluminum, were both placed in a fire and given the same amount of heat energy, the block made of aluminum would be hotter than the block made of iron. This is because iron has a higher heat capacity than aluminum, meaning it takes more energy to heat it up. Therefore, the aluminum block has absorbed more heat energy and has a higher temperature than the iron block.

In conclusion, after receiving the same amount of heat energy, the two blocks have different temperatures because they have different heat capacities. The block with the higher heat capacity (iron) requires more energy to raise its temperature, resulting in a lower temperature than the block with the lower heat capacity (aluminum).

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Scientists use the amount of radioactive material in a rock to determine its age through a process called radiometric dating or radioactive dating.

Here's how it works:

1. Radioactive Decay: Some elements in nature have unstable atomic nuclei, meaning they undergo spontaneous radioactive decay over time. During this decay, they transform into a different element or isotope while emitting radiation.

2. Half-Life: Each radioactive isotope has a characteristic half-life, which is the time it takes for half of the original parent isotope to decay into the daughter isotope. This half-life can range from fractions of a second to billions of years, depending on the isotope.

3. Measurement of Isotopes: Scientists measure the ratio of parent isotope to daughter isotope in a rock sample using various techniques, such as mass spectrometry. By knowing the half-life of the radioactive isotope, they can calculate the amount of time that has passed since the rock formed.

4. Decay Series: Some radioactive isotopes decay through a series of intermediate isotopes before reaching a stable end product. By analyzing the ratios of different isotopes in the decay chain, scientists can determine the age of the rock.

By comparing the measured amounts of parent and daughter isotopes and knowing the half-life of the radioactive isotope, scientists can calculate the age of the rock.

This method is based on the assumption that the radioactive decay rate has remained constant over time. Radiometric dating is commonly used for dating rocks and minerals, providing valuable information about the Earth's history and the ages of geological formations.

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 2 × 2

We have the final answer as

Hope this helps you

Answer:

Explanation:

12,400,000

The force applied on the object will be 5 newton in the downward direction due to the gravitational force acting on it.

if 5N force is applied in the upward direction then the force is said to be applied in +ve y axis where as the force of 10N due to gravitation applied downwards is said to be applied in the -ve y axis.

Both the forces hence will cancel out each other.

The total force applied on the objet can be represented as:

+5N + (-10N) = -5N

hence the force applied on the object is 5N in the downward direction.

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Answer:

the last one

Explanation:

its the sun when the earth turns towards the sun it gives us heat not solar radiation.

Answer:

1.diffusion, process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration. A familiar example is the perfume of a flower that quickly permeates the still air of a room.

2.Rigidity means no bending — in that case, of the rules. Objects and substances can have rigidity as well, if they literally won't bend. Rigidity means about the same thing as inflexibility, another word that describes rock-solid, unyielding people and substances.

3.the ability of a substance to flow easily

Explanation:

Hope it helps

If you stood atop a ladder that was twice as tall as your current height, your weight would decrease to one-fourth of its present value.

Weight is directly proportional to the distance between two objects and inversely proportional to the square of the distance between them. When you stand on a ladder that is twice as tall as your current height, your distance from the center of the earth will become three times greater than your previous distance.

Since weight is inversely proportional to the square of the distance, your weight will become 1/3^2 or 1/9th of your previous weight. In other words, your weight will decrease to one-fourth of its present value. This is due to the decrease in the gravitational force acting on you as the distance between you and the center of the earth increases.

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In the classical time-series decomposition model, up-and-down swings of a variable around the trend are known as the cyclical component. Option D.

Time series decomposition displays the series as a combination of level, trend seasonality, and noise components. Decomposition provides a convenient abstract model for thinking about time series in general and for better understanding problems in time series analysis and forecasting. Periodic elements of a time series refer to fluctuations around a trend, excluding irregular elements that reveal a series of expansion and contraction stages.

Decomposition is the process by which organic matter begins to decompose after it dies. This is an essential process in the life cycle of all organisms and is assisted by other organisms such as worms. Additive decomposition asserts that the time series data is a function of the sum of its components. where Y is the time series data T is the trend cycle component, S is the seasonal component, and R is the remainder.

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Comparing the sizes of stars, such as Star S and Star W, can be challenging due to several factors like distance, angular size, and evolutionary stage.

Distance: The first major challenge is accurately determining the distance to the stars. Without knowing the precise distances, it becomes difficult to accurately assess their sizes.

Angular Size: Stars appear as point sources of light in the sky due to their immense distances from Earth. This means that their sizes cannot be directly observed.

Evolutionary Stage: Stars evolve over time, and their sizes change as they progress through different stages of their life cycle.

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Option B- the inner solar system was hotter than the outer solar system is the correct answer.

The Sun and the planets formed together 4.6 billion years ago from a cloud of dust particles and gas known as the Big bang. The universe continued to decrease in density and temperature. The energy of each particle was going down.

The terrestrial planets formed near the Sun, where temperatures were best for rocks and metals to condense. The jovian planets formed outside is called the frost line, where temperatures were low for ice condensation.

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Answer:

C

Explanation:

a. Use Hooke's law to find the spring constant k :

F = kx   ⇒   10 N = k (2 mm) = k (0.002 m)   ⇒   k = 5000 N/m

b. Use Hooke's law again to find the extension x given a force of 25 N :

F = kx   ⇒   25 N = (5000 N/m) x   ⇒   x = 0.005 m = 5 mm

c. We end up with the same force as in part (b) :

F = kx   ⇒   F = (5000 N/m) (5 mm) = (5000 N/m) (0.005 m) = 25 N

The process of conduction takes place only in solids. It does not happen in liquids and gases. Heat is transferred through fluids by the process of convection. Infrared radiation transfers energy as a wave: it can travel through a vacuum.

It is the transfer of heat or electricity through a material without any physical movement of the material itself.

Conduction happens in solids, liquids, and gases, but solids are more effective at it.

The material's thermal conductivity affects how quickly heat transfers through it.

The gradient in temperature or the difference in electrical potential determines how much heat or electricity may go through a substance.

The transfer of heat or electricity through a material can be influenced by various factors, such as the type of material, its thickness, temperature, pressure, and electromagnetic fields.

Conductors are materials that allow heat or electricity to flow through them with ease, whereas insulators impede the flow of heat or electricity.

Conduction is a key factor in various industrial and technological applications, including heating and cooling systems, electrical power generation and distribution, and telecommunications.

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Explanation:

given information

vi= 4m.s^-1

vf= 14m.s^-1

a- unknown (constant)

️t = 3s

substitute the given information onto equations of motion:

Answer:

The answer is 1/16

Explanation:

1. Persistence of vision refers to the optical illusion that occurs when visual perception of an object does not cease for some time after the rays of light proceeding from it have ceased to enter the eye. 2. The persistence of vision for normal eye is 1/16 if a second.

0.09 Nm is net torque about the axle

F=9 N

r=10 cm= 0.01 m

Torque= rF

Torque=9×0.01

Torque=0.09 Nm

In physics, torque, which is also known as the moment of a force, is the propensity of a force to rotate the body to which it is applied. According to the rotational axis, the torque is determined by multiplying the force component's magnitude in the plane perpendicular to the axis by the shortest distance between the axis and the force component's direction. The force vector may always be located in a plane parallel to the axis, regardless of its orientation in space. In SI units, torque is expressed in newton meters.

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Answer:

We know that ΔK = Kf - Ki = 1/2 m Vf^2 - 1/2 m Vi^2 = 1/2m(Vf^2-Vi^2) = 1/2 m ΔV^2.

The mass remains the same, just calculate the difference of squared velocities and multiply it by half of the mass.

When a rock on a string is spun in a horizontal circle, the speed is doubled, quadrupling the tension in the string.

When the rope breaks, there is no force in the radial direction, thus the stone flies off tangentially because of inertia. Until the stone is attached to a string, the tension in the string causes centripetal force and centrifugal force along in radial direction of motion.

What is Tension in the string?

Tension is the force that is sent through a rope, string, or wire when two opposing forces pull on it. Along the whole length of the wire, the tension force pulls energy equally on the bodies at the ends.

Every physical object that comes into contact with another one exerts a force on it. These contact forces have names based on the types of things they are applied to. One of the forces exerted on an object, such as a rope, cable, or chain, is tension.

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