A circuit has a 5 V battery connected in series with a switch. When the switch is closed, the battery powers two paths in parallel, one of which has a resistor of resistance 85 ohms in series with an inductor of inductance {eq}\rm 1.1 \times 10^{-2} \ H {/eq}, while the other has a resistor of resistance 270 ohms. What is the current supplied by the battery at a time t = 0 after the switch is closed?

Answer:

Calculate its momentum. Solution:

Given,

Mass of an object (m)=12kg

Velocity (v)=3m/s

then,

p=36kg m/s

Explanation:

while finding momentum ,we should use the formula p=mv

When delivering a speech about education and the achievement gap, Julie can enhance her message by using appropriate gestures that complement her passionate advocacy.

Julie's gestures should be purposeful and aligned with her speech's content to effectively communicate her passion and conviction about the achievement gap. First and foremost, Julie can use open and expansive gestures to convey inclusivity and the importance of equal opportunities for all children.

By using her hands to create a visual representation of bridging the gap, Julie can emphasize the need for policies and initiatives that promote equity in education. Additionally, Julie can incorporate gestures that reflect empathy and understanding.

For instance, she can use gentle and compassionate hand movements to convey her acknowledgment of the challenges faced by children from working-class families. By doing so, Julie will convey sincerity and show her commitment to advocating for educational reforms that address these disparities.

Overall, Julie's gestures should complement her speech by visually reinforcing her passion and commitment to closing the achievement gap between children from different socioeconomic backgrounds.

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To find the maximum force that can be exerted horizontally on the wooden crate without moving it, we need to consider the maximum static friction force that can be applied.

The maximum static friction force can be calculated using the equation:

\(F_static_max\) = μ_s * N,

where \(F_static_max\)is the maximum static friction force, μ_s is the coefficient of static friction, and N is the normal force.

The normal force is equal to the weight of the crate, which can be calculated as:

N = m * g,

where m is the mass of the crate and g is the acceleration due to gravity (approximately 9.8 m/s²).

In this case, the mass of the crate is given as 150 kg, so the normal force N is:

N = 150 kg * 9.8 m/s² = 1470 N.

Now, we can calculate the maximum static friction force:

\(F_static_max\) = 0.60 * 1470 N = 882 N.

Therefore, the maximum force that can be exerted horizontally on the wooden crate without moving it is 882 Newtons.

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The Sun has a complex magnetic field that is generated by the movement of charged particles in its outer layers, known as the convection zone. The Sun's magnetic field is dynamic and can undergo significant changes over time, with its behavior being influenced by the solar cycle.

The solar cycle is a period of approximately 11 years during which the Sun's magnetic field undergoes a complete reversal. At the beginning of the solar cycle, the magnetic field is weak and has a simple structure with a single polarity. As the cycle progresses, the magnetic field becomes more complex and stronger, with the appearance of sunspots and other features indicating the presence of magnetic activity.

During this period, the magnetic field lines become twisted and stretched, forming loops and arches that can extend far above the Sun's surface. These structures can become unstable and release energy in the form of solar flares and coronal mass ejections, which can have a significant impact on the Earth's environment and technology.

After the peak of the solar cycle, the magnetic field begins to weaken and become less complex, eventually returning to a simple, single-polarity configuration at the start of the next cycle.

Overall, the Sun's magnetic field is a complex and dynamic system that undergoes significant changes over time, with its behavior being driven by the movement of charged particles in the convection zone and influenced by the solar cycle.

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Answer:

A gallon of water would be a good household object to use for strength training.

Explanation:

Gallon jugs of water typically weigh around 8.3 lbs, which can provide a good amount of resistance for strength training exercises such as bicep curls, shoulder presses, and tricep dips. Additionally, the handle on the jug of water makes it easy to grip and use for various exercises. Cans of soup and boxes of tissues are generally too light to provide enough resistance for strength training, and a paperback book may not be sturdy enough to use for certain exercises.

The wrench can be thrown to a height of approximately 90.91 meters on the Moon if it is given the same starting speed as on Earth.

To determine the height to which the wrench can be thrown on the moon, given the same starting speed as on Earth, we can use the concept of gravitational potential energy.

On Earth:

Let's assume the starting speed on Earth is denoted as v and the height to which the wrench is thrown is h.

Using the principle of conservation of energy, the initial kinetic energy (KE) will be converted into gravitational potential energy (PE) at the highest point of the trajectory.

On Earth, the wrench is thrown vertically upward against the acceleration due to gravity of 9.8 m/s². Therefore, at the highest point, the final velocity (vfinal) will be zero.

Using the equation: KEinitial = PEhighest,

(1/2)mv² = mgh,

Where m is the mass of the wrench (which cancels out in the equation), v is the initial speed, g is the acceleration due to gravity, and h is the height.

We can solve this equation for h:

h = (v²) / (2g)

On the Moon:

On the Moon, the acceleration due to gravity is 0.165 times that on Earth. So, the acceleration due to gravity on the Moon, gmoon, is given by:

gmoon = 0.165 * 9.8 m/s².

Since the initial speed (v) is the same on both Earth and the Moon, we can use the equation for height (h) on the Moon, using gmoon:

hmoon = (v²) / (2gmoon).

Comparing the two equations for height on Earth and the Moon:

h = (v²) / (2g),

hmoon = (v²) / (2gmoon).

Since the initial speed (v) is the same in both cases, we can see that the height on the Moon (hmoon) will be inversely proportional to the acceleration due to gravity on the Moon (gmoon) compared to Earth's gravity (g)

So, the height to which the wrench can be thrown on the Moon is given by:

hmoon = h / (gmoon / g)

Substituting the values:

g = 9.8 m/s² (acceleration due to gravity on Earth)

gmoon = 0.165 * 9.8 m/s² (acceleration due to gravity on the Moon)

hmoon = h / (gmoon / g)

hmoon = 15.0 m / (0.165 * 9.8 m/s² / 9.8 m/s²)

hmoon = 15.0 m / 0.165

hmoon = 90.91 m.

Therefore, the wrench can be thrown to a height of approximately 90.91 meters on the Moon if it is given the same starting speed as on Earth.

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Answer:

sounds like "Jumping around while dribbling shooting the ball"

Answer: One foot is it the ground at all times

Explanation:

Pivoting is keeping either your right or left foot on the ground while your opposite foot is moving, you may move in a circle. But if you take a step with the foot that is not supposed to move, you are traveling and it will be a foul. Pivoting is meant to get a pass off or a shot.

It took the wave approximately 3.46 seconds to travel a distance of 225 meters.

To find the frequency of a wave when given the speed and wavelength, we can use the formula:

frequency = speed / wavelength

Substituting the given values into the formula, we get:

frequency = 65 m/s / 0.8 m

frequency = 81.25 Hz

Therefore, the frequency of the wave is 81.25 Hz.

To calculate the time it took for the wave to travel a distance of 225 meters, we can use the formula:

time = distance / speed

Substituting the given values into the formula, we get:

time = 225 m / 65 m/s

time = 3.46 s (rounded to two decimal places)

Therefore, it took the wave approximately 3.46 seconds to travel a distance of 225 meters.

It's important to note that the formulas used assume that the wave is traveling in a uniform medium without any dispersion or other factors that could affect its speed or behavior. In reality, waves can encounter various phenomena that may alter their characteristics.

However, for the purpose of this calculation, we have assumed a simplified scenario where the wave travels at a constant speed and exhibits a single wavelength.

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A photon is a quantum of light is the correct answer.

A photon is tiny packets of energy of electromagnetic radiation. This concept is presented by Albert Einstein in order to explain the photoelectric effect. Photon is also known as light quantum because it is related to light.

So we can conclude that photon is a quantum of light is the correct answer.

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Answer:

a quantum of light

Explanation:

I got it right on the test.

Answer:

You would ultimately need to calculate the Velocity, which is, B)

Explanation:

I hope this helps, if it doesn't then just message me and ill be more than happy to help :)

The FM transmitter is producing 50 watts into a 50-ohm antenna at a carrier frequency of 525.425 MHz with a deviation of 1.25 kHz.

In FM (Frequency Modulation) transmission, the power output, antenna impedance, carrier frequency, and deviation are important parameters to consider. Here's a breakdown of the given information:

Power Output: The FM transmitter is producing 50 watts of power. This refers to the amount of power delivered to the antenna.

Antenna Impedance: The antenna connected to the transmitter has an impedance of 50 ohms. This impedance should match the transmitter's output impedance to ensure efficient power transfer.

Carrier Frequency: The carrier frequency is given as 525.425 MHz. This frequency represents the center frequency around which the FM signal varies.

Deviation: The deviation of the transmitter is specified as 1.25 kHz. Deviation refers to the maximum frequency difference between the carrier frequency and the highest or lowest frequency of the modulated signal.

From the provided information, we can conclude that the FM transmitter is operating within the specified limits for this service. The maximum allowable deviation in this service is 2.5 kHz, and the transmitter's deviation is only 1.25 kHz, which means it complies with the regulatory requirements. Additionally, the power output and antenna impedance are also within the acceptable range for the given application.

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The magnet is moving down with the north pole downward, and during the transition, there will be an increase in magnetic flux through the ring, which will produce the induced current through the ring.

When the bar is moved toward loop the flux will increase and the induced current will counter this flux.

The induced current tries to oppose the change in magnetic flux and this is possible just if the current direction is counterclockwise.

Result: The current direction is counterclockwise

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The critical angle for the interface between TiO2 and air is approximately 41.8 degrees.

The critical angle for an interface between two media is the angle of incidence of a ray of light at which the refracted ray travels along the interface, making an angle of 90 degrees with the normal to the interface.

For the interface between titanium dioxide (TiO2) and air, the critical angle can be calculated using Snell's law, which relates the angle of incidence to the angle of refraction:

n1sin(theta1) = n2sin(theta2)

where n1 and n2 are the refractive indices of the two media, and theta1 and theta2 are the angles of incidence and refraction, respectively.

The refractive index of TiO2 is about 2.55, while the refractive index of air is approximately 1. The critical angle can be found by setting the angle of refraction to 90 degrees, which gives:

sin(theta_c) = n2/n1 = 1/2.55

Taking the inverse sine of both sides of the equation, we get:

theta_c = sin^(-1)(1/2.55) ≈ 41.8 degrees

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Answer:

see below

Explanation:

1000 m / 60 s = 16 2/3  m/s

Answer:

See below ~

Explanation:

Thermodynamics is the branch of science which deals with heat and other forms of energy. Main key terms in this topic include : work, temperature, entropy, etc.

===============================================================

The function of a heat engine is to convert heat into mechanical energy.

It does this by bringing a working substance from a higher state temperature to a lower state temperature.

=============================================================

\(e_{max} = W_{max} / Q_{max}\)

- Thermodynamics can be applied to many physical systems, as long as the exchange of energy with the medium is known, regardless of the details of the interactions in those systems.

Answer:

The pressure value changes 400 % relative to the initial value.

Explanation:

Let suppose that the gas behaves ideally and represents a closed system, that is, a system with no mass interactions so that number of moles is conserved (\(n\)). Since the variables involved in the isothermal process are pressure (\(P\)) and volume (\(V\)). Finally, the process is represented by the following relationship:

\(P_{1}\cdot V_{1} = P_{2}\cdot V_{2}\) (1)

Where:

\(P_{1}, P_{2}\) - Initial and final pressures.

\(V_{1}, V_{2}\) - Initial and final volumes.

If we know that \(P_{1} = P_{o}\), \(V_{1} = V_{o}\) and \(V_{2} = 0.2\cdot V_{o}\), then the final pressure of the closed system is:

\(P_{2} = P_{1}\cdot \left(\frac{V_{1}}{V_{2}} \right)\)

\(P_{2} = 5\cdot P_{o}\)

The pressure value changes 400 % relative to the initial value.

Answer:

0.0299 N

Explanation:

Applying,

F = Gmm'/r²................... Equation 1

Where F = gravitational force between the boulders, m = mass of the first boulder, m' = mass of the second boulder, r = distance between the boulders, G = Universal constant.

From the question,

Given: m = 7.5×10⁶ kg, m' = 9.2×10⁵ kg, r = 124 m

Constant: G = 6.67×10⁻¹¹ Nm²/kg²

Substitute these values into equation 1

F = (6.67×10⁻¹¹× 7.5×10⁶ × 9.2×10⁵ )/124²

F = (460.23)/15376

F = 0.0299 N

Answer:

0.3 N

Explanation:

Plug in all your variables:

6.67 ⋅ 10^-11 (7.5 ⋅ 10^6) (9.2 ⋅ 10^5)

                    --------------------------------

                                 (124)^2

Once you plugin, You start to multiple solving to solve your problem:

460.23

----------      = 0.02993171 N

15376

Now Simplify:

Answer = 0.03 N

Answer:

(1) 1×10⁻⁴

Explanation:

From the question,

α = (ΔL/L)/(ΔT)............. Equation 1

Where α = linear expansivity of the metal plate, ΔL/L = Fractional change in Length, ΔT = Rise in temperature.

Given: ΔL/L = 1×10⁻⁴, ΔT = 10°C

Substitute these values into equation 1

α  = 1×10⁻⁴/10

α = 1×10⁻⁵ °C⁻¹ .

β = (ΔA/A)/ΔT................... Equation 2

Where β = Coefficient of Area expansivity, ΔA/A = Fractional change in area.

make ΔA/A the subject of the equation

ΔA/A = β×ΔT.......................... Equation 3

But,

β = 2α.......................... Equation 4

Substitute equation 4 into equation 3

ΔA/A = 2α×ΔT................ Equation 5

Given: ΔT = 5°C, α = 1×10⁻⁵ °C⁻¹

Substitute into equation 5

ΔA/A = ( 2)×(1×10⁻⁵)×(5)

ΔA/A  = 10×10⁻⁵

ΔA/A  = 1×10⁻⁴

Hence the right option is (1) 1×10⁻⁴

"If the darts are thrown at the same speed then (B) Projectile that travels along trajectory B was projected earlier and (C) Second dart must be projected at angle, such that 0 + 0,8 = 90° is correct."

Initial speed of dart A = u'

Angle of dart A = θ'

Initial speed of dart B = u''

Angle of dart B = θ''

Both darts start out at the same speed,

Thus, u' = u'' = u

The darts are launched one at a time from the same location A, but not simultaneously. However, they cover the same horizontal distance and arrive at B simultaneously.

Since both darts' horizontal ranges are equal,

= [ u²sin(2θ') / g ] =  [ u²sin(2θ'') / g ]

= sin(2θ') = sin(2θ'')

Although θ' is not equal to θ", we can infer that θ" >θ' from the figure.

Since both are acute angles,

= sinθ'' > sinθ'

Multiplying both sides by 2u/g, we get,

= [ 2u X sinθ'' / g ] > [ 2u X sinθ' / g ]

so that the two darts' respective trajectories are as follows:

= T'' > T'.

Thus, statement B and C are correct options.

The given question is incomplete. The complete question is '(A) Projectile that travels along trajectory A was projected earlier (B) Projectile that travels along trajectory B was projected earlier. (C) Second dart must be projected at angle e, such that 0 + 0,8 = 90° (D) Second dart must be projected at angle , >, STA​.'

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Answer:

the top with the largest radius because the radius of curvature is inversely proportional to the angular velocity

Explanation:

Angular and linear velocity are related

         v = w r

         w = v / r

Therefore, if the linear velocity of the two is the same, the one with the smaller radius has the higher angular velocity.

When reviewing the answers, the correct one is:

the top with the largest radius because the radius of curvature is inversely proportional to the angular velocity

The top that has a smaller angular velocity is D. the top with the larger radius because the radius of curvature is directly proportional to the angular velocity.

It should be noted that the top that has a higher angular velocity will be the top with the smaller radius because the radius of curvature is inversely proportional to the angular velocity

On the other hand, since the two spinning tops have different radii while both have the same linear instantaneous velocities at their edges, then the top that has a smaller angular velocity is the top with the larger radius because the radius of curvature is directly proportional to the angular velocity.

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The radioulnar joint is a synovial joint located at the elbow that connects the radius and the ulna, enabling rotational motion.

The radioulnar joint allows for pronation and supination. Pronation refers to the motion of rotating the forearm so that the palm faces downwards, while supination refers to the motion of rotating the forearm so that the palm faces upwards. The radioulnar joint allows the radius and ulna to move relative to each other, resulting in rotational motion.

When the forearm is pronated, the radius rotates over the ulna and crosses it, while the ulna remains stationary. When the forearm is supinated, the radius rotates back to its original position, and the two bones are parallel to each other.The radioulnar joint is important in many activities, including writing, typing, playing musical instruments, and sports like tennis and golf. Any damage to this joint can result in a loss of pronation and supination, making daily activities challenging.

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Answer:

0

Explanation: you are only accelerating if you are slowing down, speeding up, or changing direction

Here the focal length of the convex mirror as -12 cm, a light bulb with a diameter of 6 cm is placed 60 cm from the mirror. Hence, the image distance is -60 cm, and the image height is 6 cm.

To find the image distance and height, we will use the mirror formula for a convex mirror, which is given as follows;1/f = 1/v + 1/u. Where, f = focal length of the convex mirror;

v = the image distance;

u = the object distance

If the object distance is positive, it means the object is placed in front of the mirror, and if it is negative, it means the object is placed behind the mirror. The focal length of a convex mirror is always negative, as given above.

Therefore, u = -60 cm and f = -12 cm.

Plugging in the values in the mirror formula, we get:1/-12 = 1/v + 1/-60=> -5/60 = 1/v - (1/60) => -5/60 = (60 - v)/60=> v = -300/5= -60 cm

The image distance is -60 cm, which means the image is virtual and erect. The negative sign indicates that the image is formed behind the mirror.

To find the image height, we use the magnification formula:

m = -v/u= -(-60)/(-60)= 1

The magnification is 1, which means the image is of the same size as the object. The height of the light bulb is 6 cm, so the height of the image will also be 6 cm.

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The pressure that is created within the blood vessels when the heart beats is called systolic pressure.

Systolic pressure refers to the maximum pressure exerted on the walls of the arteries when the heart contracts and pumps blood into the circulation. It is the higher number typically seen in blood pressure measurements, such as 120/80 mmHg.

During each heartbeat, the heart muscle contracts, pushing oxygenated blood from the left ventricle into the aorta, which is the largest artery in the body. This forceful ejection of blood generates a surge of pressure that travels through the arterial system, reaching smaller blood vessels and capillaries.

Systolic pressure is a vital measurement as it reflects the force required to deliver blood to various organs and tissues throughout the body. It is influenced by factors such as the strength of the heart's contraction, the volume of blood being pumped, the elasticity of the arterial walls, and the resistance encountered within the circulatory system. Monitoring and maintaining a healthy systolic pressure range are important for overall cardiovascular health.

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Antares is the brightest star in the given list, with an apparent magnitude of -0.27. The smaller the apparent magnitude, the brighter the star appears from Earth.

Apparent magnitude is a measure of the brightness of a celestial object like a star, planet, or galaxy as seen from Earth. It is a logarithmic scale, where the smaller the number, the brighter the object appears.

The apparent magnitude of an object is affected by both its luminosity also known as its intrinsic brightness which is its absolute magnitude and its distance from Earth.

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A significant amount of energy comes to Earth from the sun every year, not all of it can be used to meet our energy needs. This is because the amount of energy that can be converted into usable forms (electricity or heat) is limited by the technology we currently have available.

The 5.6x10^21 kJ of energy from the sun indeed provides an immense amount of energy to Earth every year. However, we cannot use this energy to meet all of our energy needs due to several factors, such as:
1. Inefficiency in energy conversion: Current solar technologies cannot convert all the incoming sunlight into usable electricity, resulting in a significant amount of energy loss.
2. Uneven distribution: Sunlight is not evenly distributed across the Earth's surface, leading to varying levels of solar energy availability.
3. Storage challenges: Solar energy production is intermittent, which requires efficient storage solutions to provide a consistent energy supply, and current storage technologies are still improving.
4. Infrastructure and investment: Transitioning to a solar-powered society requires large investments in infrastructure and technology, which can be challenging for many regions.

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Answer:

It's B .0405 I just did this

Explanation:

ur welcome