8. You are heating a substance in a test tube. Always point the open end of the ne
a. Toward yourself
b. Toward your lab partner
C. Toward another classmate
d. Away from all people

Answer:

9.773m/s2

Explanation:

Given,

h=8848m

The value of sea level is 9.08m/s2

So,

Let g′ be the acceleration due to the gravity on the Mount Everest.

g′=g(1−h2h)

=9.8(1−640000017696)

=9.8(1−0.00276)

9.8×0.99724

=9.773m/s2

Thus, the acceleration due to gravity on the top of Mount Everest is =9.773m/s2

Hope it helped!!!

(i) The generator delivers a greater rms current when only the resistor is present.

(ii) The greater average power is consumed by the circuit when both the inductor and the resistor are present.

The average power consumed in the inductor-resistor series circuit is 0.0216 A.

(i) In the case where both the inductor and the resistor are present, the generator delivers a greater rms current. This is because the presence of the inductor introduces reactance, which affects the overall impedance of the circuit. The reactance of an inductor is frequency-dependent, and since the generator has a frequency of 1160 Hz, the inductor will have a significant impact on the current flow. (ii) In the case where both the inductor and the resistor are present, the greater average power is consumed by the circuit. This is because the inductor introduces reactive power to the circuit, which does not contribute to useful work but rather oscillates between the inductor and the generator. Therefore, the combination of the resistor and the inductor results in a higher total power consumption compared to when only the resistor is present.

To calculate the average power consumed in the inductor-resistor series circuit, we need to determine the total impedance of the circuit and use it to calculate the average power.

Given:

Resistance, R = 495 Ω

Inductance, L = 0.085 H

Frequency, f = 1160 Hz

Average power consumed by the resistor, P_resistor = 0.25 W

First, we calculate the reactance of the inductor using the formula X_L = 2πfL:

X_L = 2π(1160 Hz)(0.085 H) ≈ 200.34 Ω

Next, we calculate the total impedance of the circuit using the resistance and reactance:

Z = √(R^2 + X_L^2) = √(495^2 + 200.34^2) ≈ 535.23 Ω

Finally, we can calculate the average power consumed in the inductor-resistor series circuit using the formula P = I^2Z, where I is the rms current:

P = I^2Z

0.25 W = I^2(535.23 Ω)

I^2 = 0.25 W / 535.23 Ω

I ≈ √(0.000468 A)

I ≈ 0.0216 A

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We will have the following:

1. True.

2. False. Mechanical waves need a medium to travel.

3. True.

4. True.

5. True.

The maximum cargo load of the Goodyear blimp is 2568.8 kg when flying at a sea-level location with an air temperature of 20°C.

To solve this problem, we need to use Archimedes' principle, which states that the buoyant force on an object is equal to the weight of the fluid displaced by the object. In this case, the fluid is air, and the buoyant force on the blimp is equal to the weight of the air displaced by the blimp.

First, we need to calculate the weight of the blimp, which is equal to the sum of the envelope and gondola:

Weight of blimp = 4300 kg

Next, we need to calculate the weight of the air displaced by the blimp. We can use the density of air at 20°C, which is approximately 1.204 kg/m³:

Volume of blimp = 5700 m³

Weight of air displaced = Volume of blimp x Density of air = 5700 x 1.204 = 6868.8 kg

Finally, we can calculate the maximum cargo load by subtracting the weight of the blimp from the weight of the air displaced:

Maximum cargo load = Weight of air displaced - Weight of blimp = 6868.8 - 4300 = 2568.8 kg

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Answer:

Force is in lbs and distance is in ft.

W = F * d = ft-lbs       units of work

(Note - torque = F * R   normally torque is specified in "lbs-ft" to distinguish work from torque)

The most economical sources for electricity in remote locations would be solar and wind electricity production.

Solar power is the process of converting sunlight into electricity using photovoltaic (PV) cells or panels. The photovoltaic effect, discovered by French physicist Edmond Becquerel in 1839, converts sunlight into electricity.

Solar panels generate direct current (DC) electricity when exposed to sunlight. The current is transferred to an inverter, which converts the DC electricity to alternating current (AC) electricity, which is used in homes and buildings.

Wind energy is a type of renewable energy generated by the movement of the wind. Wind turbines are used to convert wind energy into electricity. Wind energy is the most commonly used renewable energy source, accounting for around 5% of all electricity generated worldwide. Wind turbines can be installed on land or offshore, depending on the location.

In conclusion, solar and wind electricity production are the most economical sources for electricity in remote locations.

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a) The normal force that the wall exerts on the top tip of the ladder is the weight of the ladder (12.0 kg x 9.8 m/s2) plus the weight of the painter (55.0 kg x 9.8 m/s2): 129.6 N.

b) The normal force that the floor exerts on the bottom tip of the ladder is the weight of the ladder (12.0 kg x 9.8 m/s2) plus 3/4 of the weight of the painter (41.25 kg x 9.8 m/s2): 111.35 N.

c) The coefficient of static friction between the ladder and the floor is 6015

a) The normal force that the wall exerts on the top tip of the ladder is the sum of the weight of the ladder and the weight of the painter, since the wall is supporting both these objects.

b) The normal force that the floor exerts on the bottom tip of the ladder is the sum of the weight of the ladder and 3/4 of the weight of the painter, since the painter is only 70% of the way up the ladder.

c) The coefficient of static friction between the ladder and the floor can be calculated by taking the ratio of the normal force to the frictional force: μ = Ff/Fn.

Since the normal force is 111.35 N and the frictional force is the minimum force necessary to prevent the ladder from slipping, it can be calculated by multiplying the weight of the ladder and the painter (67.25 kg x 9.8 m/s2) by the coefficient of static friction: μ = Ff/Fn = 684.85/111.35 = 6.15.

The coefficient of static friction between the ladder and the floor is calculated by taking the ratio of the normal force to the frictional force. The normal force is the sum of the weight of the ladder and the painter, and the frictional force is the minimum force necessary to prevent the ladder from slipping.

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A light beam bends toward the normal when it passes through an interface into a material having a higher refractive index. On the other hand, light that is crossing an interface between two media with different refractive indices will deviate from the norm.

Refraction is the term used to describe the bending of light as it travels through different media. The amount of light is refracted depends on the density of the substance, the angle and wavelength at which the light enters it.

There is no force acting on light when it travels from one medium to other.

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Answer:

10 litres.

Explanation:

The air fuel ratio for aircraft is 12:1. It is due to simplicity piper archer is equipped with continuous flow injection system. There is a fuel sensing is Piper Archer which informs the pilot about the low fuel when the fuel level reaches to as low as 10 litres only in the tank. The yellow low furl light will illuminate to alert the pilot.

Answer:

a.) L = 2.64 kgm^2/s

b.) V = 4.4 m/s

Explanation: Jessica stretches her arms out 0.60 m from the center of her body. This will be considered as radius.

So,

Radius r = 0.6 m

Mass M = 2 kg

Velocity V = 1.1 m/s

Angular momentum L can be expressed as;

L = MVr

Substitute all the parameters into the formula

L = 2 × 1.1 × 0.6 = 1.32kgm^2s^-1

the combined angular momentum of the masses will be 2 × 1.32 = 2.64 kgm^2s-1

b. If she pulls her arms into 0.15 m,

New radius = 0.15 m

Using the same formula again

L = 2( MVr)

2.64 = 2( 2 × V × 0.15 )

1.32 = 0.3 V

V = 1.32/0.3

V = 4.4 m/s

Her new linear speed will be 4.4 m/s

The weight of a \(45 kg\) box is \(441.45 N\).

Weight refers to the measure of the force exerted on an object due to the gravitational pull of the Earth.

Given the mass of the box is \(m=45 kg\).

The weight of an object (\(W\)) can be found by multiplying the mass of the object (\(m\)) by the acceleration due to gravity (\(g\)).

So, \(W=mg\).

It is known that acceleration due to gravity, \(g=9.81 m/s^2\).

Hence, the weight of the box, \(W=(45kg)\times (9.81 m/s^2)\).

\(\Rightarrow W=441.45 (kg\cdot m/s^2)\\\Rightarrow W=441.45 N\)

Therefore, the weight of the box is \(441.45 N\).

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Equipment that is operated by a fluid under pressure, such as water or oil, is known as a hydraulic system. These systems use pressurized fluid to transmit power and perform various tasks, like lifting heavy loads or operating machinery. Common examples of hydraulic equipment include excavators, car jacks, and hydraulic brakes.

The type of equipment that is typically operated by a fluid that is under pressure, such as water or oil, includes hydraulic equipment and pneumatic equipment.

These types of equipment use the pressure of the fluid to power various mechanisms and perform tasks, such as lifting heavy objects or moving machinery.

Examples of hydraulic equipment include hydraulic presses, cranes, and excavators, while examples of pneumatic equipment include air compressors, drills, and pumps.

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The power of the engine in kilowatts which pulls a train of mass 600 tonnes up an incline of 1 in 100 at the rate of 60km/he is: 13,450 kW.

To solve this problem, we need to use the equation for power:

Power = force x velocity

First, we need to calculate the force required to pull the train up the incline. This force can be calculated as the sum of the force required to overcome the force of gravity and the force of friction.

Force = (mass of train + mass of engine) x (sinθ + friction coefficient x cosθ)

where:

   mass of train = 600 tonnes

   mass of engine = 200 tonnes

   θ = angle of incline = arctan(1/100)

   friction coefficient = 50 N/tonne

Plugging in the values, we get:

θ = 0.57 degrees

Force = (600 + 200) x (sin(0.57) + 50/1000 x cos(0.57))

= 807.33 tonnes

Next, we need to convert the velocity from km/h to m/s:

60 km/h = 16.67 m/s

Finally, we can calculate the power:

Power = Force x Velocity / 1000

= 807.33 x 16.67 / 1000

= 13.45 MW

Converting to kilowatts, we get:

Power = 13.45 MW = 13,450 kW

Therefore, the power of the engine is 13,450 kW.

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most common finishes applied to aluminum curtain wall componets is fluoropolymer paint or anodized finish.

Anodizing is an electric process that forms a very thick oxide layer with integral color .

An anodized surface is very durable and can be had in many colors , although it is not generally capable of producing very bright colors .

Anodizing is commonly used to improve the corrosion resistance and wear resistance of aluminum parts. It can also provide other desirable benefits, like improved heat dissipation and the ability to accept dyes.

Unlike paints and coatings, anodizing does not apply an external product to the exterior of the aluminum. Instead, an electrochemical process is used to stimulate the naturally-occurring layer of aluminum oxide into growing thicker. This protects the underlying aluminum from its environment, and can even accept dyes. However, the color possibilities for anodizing are not as abundant as in powder coating.

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The Kelvin scale is known as the absolute scale. The lowest temperature in Kelvin is the temperature 0 (there is no negative temperature in Kelvin).

The conversion from Kelvin to Fahrenheit is given by the formula below:

Using K = 0 in this formula, we have:

So the lowest temperature in Fahrenheit is -459.67 °F.

Answer:

R∝L

Explanation:

The portion of the object submerged in water is determined as 0.25.

The fraction of the object submerged in water is calculated as follows;

S.G =  (density of object) / (density of water)

where;

S.G = (250 kgm⁻³) / (1000 kgm⁻³)

S.G = 0.25 = ¹/₄

Thus, the portion of the object submerged in water is determined as 0.25.

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Answer:

Option B. Decreases

Explanation:

Coulomb's law states that:

F = Kq₁q₂ / r²

Where:

F => is the force of attraction between two charges

K => is the electrical constant.

q₁ and q₂ => are the two charges

r => is the distance apart.

From the formula:

F = Kq₁q₂ / r²

The force of attraction (F) is inversely proportional to the square of their separating distance (r).

This implies that as the distance between them increase, the force of attraction between the two charges will decrease and as the distance between two charges decrease, the force of attraction between them will increase.

Considering the question given above and the illustration given above, the force of attraction will decrease as their distance of separation increases.

Option B gives the right answer to the question.

In a fire piston, the temperature of the gas inside the piston increases due to adiabatic compression.

In physics, pressure is a measure of the force per unit area that a fluid (liquid or gas) exerts on its surroundings. It is defined as the force F acting perpendicular to a surface divided by the area A over which the force is distributed: pressure = F/A. The SI unit of pressure is the Pascal (Pa), which is defined as one Newton per square meter (N/m²). Other common units of pressure include pounds per square inch (psi), atmospheres (atm), and bar (bar). Pressure is an important concept in many areas of physics, including fluid mechanics, thermodynamics, and atmospheric science. It describes the behavior of fluids in pipes and channels, the operation of hydraulic systems, and the behavior of gases in sealed containers. The pressure of a fluid is related to its density and temperature, and can be influenced by factors such as gravity, elevation, and the motion of the fluid itself.

Here,

When the piston is rapidly pushed down into the cylinder, it compresses the gas inside the cylinder. This rapid compression causes the gas molecules to collide with each other more frequently and with greater force, which in turn increases the temperature of the gas.

Because the compression is adiabatic (i.e., no heat is allowed to enter or leave the system), the increase in temperature is due solely to the work done on the gas by the piston. This increase in temperature is known as adiabatic heating.

The fire piston is a simple but effective tool for starting a fire in the wilderness, and it demonstrates the principles of adiabatic compression and the relationship between pressure, volume, and temperature in a gas.

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Answer:

Velocidad final, V = 40 m/s

Explanation:

Dados los siguientes datos;

Aceleración = 5 m/s²

Velocidad inicial = 0 m/s (ya que comienza desde el reposo)

Tiempo = 8 segundos

Para encontrar la velocidad final, usaríamos la primera ecuación de movimiento;

\( V = U + at\)

Dónde;

Sustituyendo en la fórmula, tenemos;

\( V = 0 + 5*8 \)

\( V = 0 + 40 \)

\( V = 40 \)

Velocidad final, V = 40 m/s

A graph with vertical axis K E and horizontal axis Speed with a straight line sloping sharply upward.

The kinetic energy of an object is directly proportional to the square of its speed which means that if kinetic energy of an object increases the speed of that object is also increases and vice versa so we can conclude that graph with vertical axis K E and horizontal axis Speed with a straight line sloping sharply upward is the right answer.

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Answer:

The correct answer is:

B.)

Explanation:

I did the assignment on Edge, 2022.

(See the attachment below.)

Hope this helped, good luck on the quiz! :D

Because we already know that this function is exponential, that sort of function that describes the amplitude of damped oscillatory motion is exponential. \(y=A\times e^{\frac{-b}{2m} }\)\(\times cos\omega t\)    

The maximum displacement or distance a point on a vibrating body or wave can move in relation to its equilibrium location is referred to as the amplitude in physics. It is equivalent to the half-length of the vibration path. The bob swings halfway across the pendulum's amplitude when it shifts from one side to the other. Waves are produced by vibrating sources, and the amplitude of the waves is inversely proportional to the amplitude of the source. The largest deviation of any point on a transverse wave, such as the wave on a plucked string, from its position when the wave is at rest, is used to determine the wave's amplitude.

\(y=A\times e^{\frac{-b}{2m} }\)\(\times cos\omega t\)    \(\rightarrow(1)\)

here function is \(A\times e^{\frac{-b}{2m} }\)    is amplitude

as per equation ( 1 ) it is exponential

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Answer:

Scientists have found the reason why our body temperature is 98.6°farehenheit (37°c). Apparently it's the perfect balance as it's warm enough to prevent fungal infection but not so hot that we need to eat nonstop to maintain our metabolism. ... So we know we need a higher body temperature to ward off fungal infection.

A power loss ride through function is limited to 1-2 seconds.

Typically, the length of the power loss ride-through function is created to offer a long enough buffer time to bridge the gap between the power loss and the power restoration. It enables the system or gadget to securely shut down without causing a sudden disruption to operations.

The application requirements, system criticality, energy storage or backup power capacity, and the time needed for power restoration or alternative power source activation can all be used to establish the precise duration of the ride-through function.

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Answer:

south

Explanation:

The wavelength of red helium-neon laser light in air is not provided. To answer the questions, the wavelength is required. Without the wavelength value, it is not possible to calculate the frequency, wavelength in glass, or the speed of light in the glass.

The questions ask for the frequency, wavelength in glass, and speed of red helium-neon laser light. However, these values depend on the specific wavelength of the light, which is not provided. Different colors of light have different wavelengths, frequencies, and behaviors when passing through different media.

To determine the frequency of the light, the wavelength is needed, as frequency and wavelength are inversely proportional. The relationship between frequency (f), wavelength (λ), and the speed of light (c) is given by the equation c = f * λ.

Similarly, to calculate the wavelength in glass and the speed of light in the glass (which depends on the index of refraction of the glass), the specific wavelength in question is required. Different materials have different indices of refraction, and the wavelength of light changes as it passes through different media.

Without the specific wavelength value of the red helium-neon laser light in air, it is not possible to provide accurate answers to the questions regarding frequency, wavelength in glass, or speed of light in the glass.

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