Which of the following statements about brown dwarfs is not true?.

The hydrostatic pressure at a given depth in a large tank of liquid is a function of depth and liquid density. Therefore, choices a and c are both valid.

The hydrostatic pressure at a given depth in a liquid is determined by the weight of the liquid above that depth.

As the depth increases, the weight of the liquid above it increases, resulting in an increase in pressure.

The pressure at a given depth can be calculated using the following formula:

P = ρgh

where P is the pressure, ρ is the density of the liquid, g is the acceleration due to gravity, and h is the depth.

As we can see from the formula, the pressure is directly proportional to the depth and the density of the liquid. The surface area of the tank does not affect the hydrostatic pressure at a given depth.

Therefore, choices a and c are both valid as the hydrostatic pressure at a given depth is a function of depth and liquid density.
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Answer:

26.02 ml

Explanation:

0.055(473.0) = 26.02 ml

Part h an l - r - c series circuit has inductance 42.0 mh , capacitance c , and resistance r . without the resistor, the angular frequency of oscillation is 624 rad/s . with the resistor, the angular frequency is 208 rad/s .

The value of R = 8.736 Ω

The value of C = 6.19 × 10⁻⁵ F

By a factor of 2, angular frequency (measured in radians per second) is bigger than frequency (measured in cycles per second, commonly known as Hz). Frequency is represented by the symbol rather than f. A sphere that revolves around an axis. Moving faster and satisfying = v / r are points further from the axis.

Given that,

inductance (L) = 42 mH

                        = 42 × 10⁻³ H

angular frequency (ω) = 620 rad/sec

without the resistor, the angular frequency of oscillation is,

ω = \(1/\sqrt{LC}\)

or, \(1/\sqrt{LC}\) = 620 rad/sec

or, \(1/LC\) = (620)²

or, C = 1 / (620)²× (42 × 10⁻³)

or, C = 6.19 × 10⁻⁵ F

With resistor, ω = 208 rad/sec

or, ω = R/L

or, R = ωL

or, R = (42 × 10⁻³) × (208)

or, R = 8.736 Ω

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The complete question is as follows:

An L-R-C series circuit has inductance 42.0 mH, capacitance C, and resistance R. Without the resistor, the angular frequency of oscillation is 624 rad/s. With the resistor, the angular frequency is 208 rad/s.

Find the value of C.

Find the value of R.

Answer:

1 Unit Electricity is the amount of electrical energy consumed by a load of 1 kW power rating in 1 hour..

Explanation:

Answer:

1200 N

Explanation:

First, we need to calculate how much time the force was applied. If the stone traveled at 20.0m/s and made a 0.20 cm deep dent, the time is equal to

Where the distance is 0.20 cm = 0.0020 m and the average speed can be calculated as:

Therefore, the time is equal to

Then, the force can be calculated using the following equation for impulse

Where m is the mass, v is the speed and t is the time, so replacing m = 0.012 kg, v = 20 m/s and t = 0.0001 s, we get

So, the average force was 1200 N

During autumn, the storm travels at a speed of 20 m/s, then the average force the car has to exert to stop the damaging hail storm is 1200 N.

A force in physics is an effect that has the ability to modify an object's motion. A bulk object's velocity can vary, or accelerate, as a result of a force. Intuitively, a push or a pull can be used to describe force. Being a vector quantity, a force also has magnitude and direction. The SI unit of newton is used to measure it (N). The letter F symbolizes for force.

As per Newton's second law's original formulation, an object's net force is equal to the speed at which momentum is changing over time.

According to the given information in the question,

Speed, s= 20 m/s

Average speed, s = Distance/Time

s = [v(i) + v(f)] / 2

s = (20 + 0)/2

s = 10 m/s

Now calculate the time,

Time, t = 0.0020/10

t = 0.0002 seconds.

Use the equation for impulse,

f × t = mv

⇒f = mv/t

f= (0.012 × 20)/0.0002

f = 1200 N

Therefore, the force applied is 1200 N.

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The vector v with a magnitude of 6 and the same direction as u = [1, 1] is v = [6, 6].

The given vector u = [1, 1] has a magnitude of √(1² + 1²) = √2. To find a vector v with a magnitude of 6 and the same direction as u, we need to scale up the vector u by a factor of 6/√2.

The unit vector in the same direction as u is u/|u| = [1/√2, 1/√2]. To obtain v, we multiply this unit vector by the desired magnitude of 6, resulting in v = 6 × [1/√2, 1/√2] = [6/√2, 6/√2] = [3√2, 3√2]. Therefore, the vector v with a magnitude of 6 and the same direction as u is v = [3√2, 3√2], which can be simplified as v = [6, 6].

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The vector v with a magnitude of 6 and the same direction as u = [1, 1] is v = [6, 6].

The given vector u = [1, 1] has a magnitude of √(1² + 1²) = √2. To find a vector v with a magnitude of 6 and the same direction as u, we need to scale up the vector u by a factor of 6/√2.

The unit vector in the same direction as u is u/|u| = [1/√2, 1/√2]. To obtain v, we multiply this unit vector by the desired magnitude of 6, resulting in v = 6 × [1/√2, 1/√2] = [6/√2, 6/√2] = [3√2, 3√2]. Therefore, the vector v with a magnitude of 6 and the same direction as u is v = [3√2, 3√2], which can be simplified as v = [6, 6].

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46 °C is the outlet temperature of the pump.

Temperature is the measure of hotness or coldness expressed in terms of any of numerous scales, which includes Fahrenheit and Celsius.

Temperature shows the path wherein warmness power will spontaneously go with the flow i.e., from a hotter frame to a chillier body.

calculation:-

PT = PT2

T2 = PT/P2

= 0.1 × 298/5

= 47°C

The pressure of a given amount of gas is without delay proportional to the temperature at a given quantity. When the temperature of a gadget is going up, the pressure additionally goes up, and vice versa. the connection among strain and temperature of a fuel is said through the Gay-Lussac's law.

The pressure law states that for a constant extent of fuel in a sealed box the temperature of the gas is directly proportional to its strain. this could be without problems understood by visualizing the particles of gasoline inside the field moving with a more energy when the temperature is increased.

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Answer:

Space

Explanation:

Solar energy is energy from the Sun. This energy is in form of radiation heat and light. When solar energy reaches a surface it bounces off. This is because they are radiation waves.

Answer:

There are several reasons why a hunter might choose to use a shotgun with slugs instead of a rifle.

Cost. Shotguns are typically less expensive than rifles.

Accuracy. Slugs are more accurate than buckshot at longer ranges.

Versatility. Shotguns can be used for a variety of hunting applications, including waterfowl, upland game, and big game.

Recoil. Shotguns have less recoil than rifles, making them easier to shoot for extended periods of time.

Penetration. Slugs can penetrate thicker materials than buckshot, making them a better choice for hunting large game.

Of course, there are also some disadvantages to using a shotgun with slugs.

Range. Slugs are not as effective at long ranges as rifle bullets.

Shotgun spread. Shotguns with slugs do not have a spread like shotguns with buckshot. This can make it more difficult to hit a target at close range.

Shotgun choke. The choke on a shotgun can affect the accuracy of slugs. A rifled choke is the best choice for shooting slugs.

Ultimately, the decision of whether to use a shotgun with slugs or a rifle depends on the individual hunter's needs and preferences.

Explanation:

Answer:

jumping, pulling a elastic band, bouncing a ball

Explanation:

when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air.

When we pull an elastic band, it automatically returns to its original position. The more you pull the more force it generates. This is the same when you pull or compress a spring. The action (applied force) is stored as energy and is released as a reaction with an equal and opposite force

A ball is able to bounce because of the reaction from the ground. If there was no reaction then the ball would not bounce but rather stick to the ground.

The sound waves from Juan's voice are lower in frequency than those from Joseph's voice, and they are lower in hertz.

The frequency of a sound wave refers to the number of cycles or vibrations it completes in one second and is measured in hertz (Hz). In this case, since Joseph has a higher-pitched tenor voice, his vocal cords vibrate at a higher frequency compared to Juan's lower-pitched baritone voice. Thus, the sound waves produced by Joseph's voice have a higher frequency, measured in hertz.

Decibels (dB), on the other hand, measure the amplitude or intensity of sound waves, indicating their loudness. The question does not mention any differences in amplitude between Juan and Joseph's voices, so we cannot conclude that the sound waves are lower in decibels. The distinction lies in the frequency, which affects the pitch of the voice, with Juan's voice being lower in frequency compared to Joseph's.

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False. When traveling on rural roadways at higher speeds, there are several factors that must be considered to ensure safety. These factors include potential the condition of the road surface, visibility, and the presence of other vehicles or pedestrians.

The important to drive cautiously and within the speed limit to avoid accidents and ensure the safety of everyone on the road. Additionally, it is important to be aware of any potential hazards such as animals crossing the road or sudden changes in road conditions. When traveling on rural roadways, it is also important to have a plan in place in case of an emergency, as help may not be readily available. By being prepared and driving safely, you can enjoy the beautiful scenery and peacefulness of rural areas without putting yourself or others in danger.

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Answer:

The electric field will exert a force that accelerates the charged particle. The electric field has a direction, positive to negative. ... If it is moving in the opposite direction it will decelerate. If a negative charge is moving in the same direction as the electric field vector the particle will decelerate.

The amount of heat absorbed by the engine from its heat-source reservoir is 107.692 kW.

In order to solve the given problem, let's start by calculating the Carnot coefficient of performance of the Carnot refrigerator.

The Carnot coefficient of performance of the Carnot refrigerator is given by the following relation:

\($$\omega_{Carnot} = \frac{T_0}{T_1 - T_0}$$\)

Where\(,$\omega_{Carnot}$\) = Coefficient of performance of the Carnot refrigerator

$$\omega_{Carnot} = \frac{T_0}{T_1 - T_0}$$\(

$$\omega_{Carnot} = \frac{T_0}{T_1 - T_0}$$\) = Temperature of the low temperature reservoir = 0 °C = 273 K

\($T_1$\) = Temperature of the high temperature reservoir

Let's substitute the given values in the above equation.

\($$0.6 \omega_{Carnot} = 0.6 \times \frac{273}{T_1 - 273}$$\)

\($$\implies T_1 - 273 = \frac{273}{0.6 \omega_{Carnot}}}$$\)

\($$\implies T_1 = 273 + \frac{273}{0.6 \omega_{Carnot}}}$$\)

\($$\implies T_1 = 455 K$$\)

Therefore, the temperature of the high temperature reservoir of the Carnot refrigerator is 455 K

.Now, let's calculate the thermal efficiency of the Carnot engine.

The thermal efficiency of the Carnot engine is given by the following relation:

\($$\eta_{Carnot} = 1 - \frac{T_0}{T_1}$$\)

Where,\($\eta_{Carnot}$\) = Thermal efficiency of the Carnot engine

\($T_0$\)= Temperature of the low temperature reservoir = 0 °C = 273 K

\($T_1$\) = Temperature of the high temperature reservoir

Let's substitute the given values in the above equation.

\($$0.6 \eta_{Carnot} = 0.6 \times \left(1 - \frac{273}{T_1}\right)$$\)

\($$\implies 0.6 \eta_{Carnot} = 0.6 - \frac{273}{T_1}$$\)

\($$\implies 0.6 \eta_{Carnot} = \frac{0.6T_1 - 273}{T_1}$$\)

\($$\implies 0.6 \eta_{Carnot} = \frac{0.6 \times 455 - 273}{455}$$\)

\($$\implies \eta_{Carnot} = 0.325$$\)

Therefore, the thermal efficiency of the Carnot engine is 0.325.

Now, let's calculate the amount of heat absorbed by the engine from its heat-source reservoir.

The rate at which the heat is extracted from the low temperature reservoir by the Carnot refrigerator is given as follows:

\($$Q_{extracted} = \omega_{Carnot} \times W = 0.6 \omega_{Carnot} \times 35 \ \text{kW} = 21 \ \text{kW}$$\)

Here, the work produced by the Carnot engine is used by the Carnot refrigerator in extraction of heat from a heat reservoir at 0 °C.

Now, the rate at which the engine delivers work to the surroundings is the rate at which the engine absorbs heat from its heat-source reservoir. This is given by the following relation:

\($$W = \eta_{Carnot} \times Q_{absorbed}$$\)

\($$\implies Q_{absorbed} = \frac{W}{\eta_{Carnot}}$$\)

\($$\implies Q_{absorbed} = \frac{W}{\eta_{Carnot}}$$\)

\($$\implies Q_{absorbed} = 107.692 \ \text{kW}$$\)

Therefore, the amount of heat absorbed by the engine from its heat-source reservoir is 107.692 kW.

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Answer:

72 km

Explanation:

The formula for Distance = Speed × Time

Speed = 10 m/s

1 metre per second = 3.6 kilometres per hour

10 metre per second =

10 metre per second = × 3.6 kilometres per hour/1 metre per second

= 36km/hr

How far he has travelled = Distance =

Speed × Time

= 36km/hr × 2 hrs

= 72 km

A race car is moving at a constant speed around a track. The race car is changing its velocity as the direction of motion changes.

The primary indicator of an object's position and speed is its velocity. It is the distance that an object travels in one unit of time. The displacement of the item in one unit of time is the definition of velocity.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

As the race car is moving at a constant speed around a track, the magnitude of velocity remains same but during race it may changes its direction of motion, that is why, velocity of it, which depends on both magnitude and direction, may changes.

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Answer: Find the answer in the explanation

Explanation:

The music playing on the radio will be heard through the sound waves coming from the radio.

The travelling wave will obey Newton's first law of motion which state that:

An object or particle will remain at rest or continue its linear motion in a straight line except an external force is applied.

The external force through wind could affect the travelling of the sound waves. Since the wave is longitudinal wave. That is, it needs a medium (air) for its propagation.

The angle of incidence from the glass when the reflected light in the glass is linearly polarized is called Brewster's angle.

Brewster's angle is the angle of incidence at which light is polarized when it is reflected from a transparent surface, such as glass. The reflected light at this angle is entirely polarized and has no parallel component.What is polarization of light?When light waves propagate through space, the electric and magnetic fields at each point in the wave can oscillate in different directions.

                        The polarization of light is the orientation of the electric field vector that produces the electromagnetic wave as it propagates. The reflected light from a transparent surface, such as glass, is entirely polarized when the angle of incidence is Brewster's angle. When the angle of incidence is greater than Brewster's angle, both polarizations are reflected, and the reflected light is no longer linearly polarized.

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Answer:

i'll answer your question but follow me first

If all the mechanical energy is converted into heat that stays in the water. 0.21˚C rise in temperature occurs in a 90.0 m waterfall.

The total kinetic and potential energy is known as mechanical energy. According to the principle of mechanical energy conservation, mechanical energy is constant in an isolated system when only conservative forces are acting on it.

The mechanical energy of water is converted into heat energy.

P.E = mgh = m x 9.8 x 90.0

P.E = 882 m.

Let rise in temperature θ

Heat energy = mass × specific heat × temperature change

Heat energy = m x s x θ

specific heat = 4186 J/(Kg *˚C)

m x s x θ =  882 m

m x 4186 x θ = 882 m

θ = 0.21˚C.

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Answer:

t= 2.0s

Explanation:

Khan Academy

Answer:a farmer?

Explanation:

Because they raise their livestock or plants then eat them once they are big enough or fully grown?

The maximum height above the platform reached by the box before it begins to fall is 1.5 m.

The given parameters:

The maximum height above the platform reached by the box before it begins to fall is calculated as follows;

\(mgh = E\\\\h = \frac{E}{mg} \\\\h = \frac{14.7}{1 \times 9.8} \\\\h = 1.5 \ m\)

Thus, the maximum height above the platform reached by the box before it begins to fall is 1.5 m.

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The polarity of water allows it to dissolve and transport various substances in biogeochemical cycles. The fact that water is most dense at 4 degrees Celsius enables the survival of aquatic organisms during cold temperatures.

Polarity: Water's polarity enables it to dissolve and transport nutrients and minerals in biogeochemical cycles. For example, in the nitrogen cycle, water facilitates the transport of nitrogen compounds such as nitrates and ammonium, which are essential for plant growth.

Water's polarity also aids in the dissolution and transport of organic matter and nutrients in the carbon cycle.

Density at 4 degrees Celsius:

Water's unique property of being most dense at 4 degrees Celsius plays a crucial role in the survival of aquatic organisms during cold temperatures.

As the temperature drops, water becomes less dense and floats, forming an insulating layer on top of lakes and rivers. This layer of floating ice helps to maintain a stable temperature below the ice, protecting the organisms living in the water from freezing temperatures and providing a habitat for aquatic life during winter.

In summary, water's polarity facilitates the transport of substances in biogeochemical cycles, while its density at 4 degrees Celsius supports the survival of aquatic organisms in cold environments.

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Answer:

C:Hardness

Explanation:

if youre hitting something your going to see wich one breaks first

Answer:

it’s C:)

Explanation:

Answer:

The distance the 2.0-cm-diameter piston must be pushed down to raise 9 cm diameter is 607.5 cm.

Explanation:

Distance the piston must be pushed down.

The effective resistance between a and b is determined as R/6.

The effective resistance between a and b is calculated from the total resistance of the parallel circuit.

1/Re = 1/R₁ + 1/R₂ + 1/R₃

where;

The effective resistance between a and b is calculated as follows;

1/Re = 1/R + 1/R + 1/R

1/Re = (1 + 1 + 1) /R

1/Re = 3/R

Re = R/3

The effective resistance between a and b is = R/3  x ¹/₂ = R/6

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