The
magnitude of the resultant vector of the vectors of magnitudes 8N
and 6N is
14 N
2 N
10 N
8 N

Answer:

175

Explanation:

its for Acellus

The potential difference is V=1.743*10^-7

The voltage is generally referred to as the electric potential difference and  it can be measured using a voltmeter. The electrical potential difference between the two plates is expressed as q=CV.

CALCULATION

we know,

q=CV

q={EA/d}*V

here q= 5.24*10^-8C

       A=8.22*10^-5m^2

       d=2.42*10^-8m

therefore , C={( 8.85*10^-12)*(8.22*10^-5)}/(2.42*10^-8)

                 C=3.006*10^-1

q=CV

q/C=V

V=1.743*10^-7

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The temperature in Kelvin (K) is equal to the temperature in Celsius (°C) plus 273.15.

The Celsius and Kelvin temperature scales are two common temperature scales used in science. The relationship between these two scales can be described by a simple equation.

To convert a temperature from Celsius to Kelvin, you add 273.15 to the Celsius temperature. This equation is derived from the fact that the Kelvin scale starts at absolute zero, which is -273.15°C. Therefore, to account for the offset between the two scales, 273.15 is added to the Celsius temperature to obtain the equivalent temperature in Kelvin.

For example, if you have a temperature of 25°C, you can convert it to Kelvin by adding 273.15:

25°C + 273.15 = 298.15 K

So, 25°C is equivalent to 298.15 K.

This equation holds true for any temperature value in Celsius. By adding 273.15 to a Celsius temperature, you obtain the corresponding temperature in Kelvin.

In summary, the equation K = °C + 273.15 represents the conversion between Celsius and Kelvin temperatures, where K represents the temperature in Kelvin and °C represents the temperature in Celsius. Adding 273.15 to a Celsius temperature gives the equivalent temperature in Kelvin.

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Answer:

=>8x+9x+5+3

=>8x+9x+5+3=>17x+8

Answer:scattered plot

Explanation:

Answer:

Given Mas (m) =63kg

velocity (v) =4.3m/s

momentum (p) =?

p=mv

63kgx4.3m/s

270.9kg.m/s

the momentum =270.9kg.m /s

If a ball of mass 0.63 kilograms is moving at 4.3 meters/seconds, then the momentum of the ball would be 2.709-kilogram meters/second.

It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle.

Momentum = mass of the object × velocity of the object

As given in the problem we have to calculate the momentum of the ball if it has a mass of 0.63 kilograms and moving with a speed of  4.3 meters/seconds,

The momentum of the ball = 0.63× 4.3

                                             =2.709 kilogram meters/second

Thus, the momentum of the ball comes out to be 2.709-kilogram meters/second.

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A fuel-filled rocket is at rest. It burns its fuel and expels hot gas. The gas has a momentum of 1,500 kg m/s backward. So, The momentum of the rocket is -1500 kg m/s.

According to the law of conservation of momentum, in a closed system, the total momentum before and after a process remains constant.

A fuel-filled rocket that is initially at rest expels hot gas as it burns its fuel. The gas has a momentum of 1500 kg m/s backward.

We are required to determine the momentum of the rocket.

Consider the fuel-filled rocket as a system.

We have: Momentum before the burn = 0 kg m/s (since the rocket was at rest initially)Momentum after the burn = momentum of the expelled gas

We can therefore say that the initial momentum of the system was zero (0), and after the burn, the total momentum of the system remains the same as the momentum of the expelled gas.

Therefore: Momentum of rocket = - momentum of expelled gas

The negative sign signifies that the rocket's momentum is in the opposite direction of the expelled gas.

Hence, the momentum of the rocket is -1500 kg m/s.

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The magnitude of electromotive force is 0.32 volts.

We need to know about the electromotive force of induction to solve this problem. The emf induction appears when there is any change in magnetic flux. The magnitude of emf can be determined by

ε = N dΦ / dt

where N is coil turns, ε is electromotive force, dΦ is change in magnetic flux and dt is time interval.

From the question above, the parameters given are

B = 0.047 T

dt = 0.34 s

N = 10

A = 0.23 m²

Find the change in magnetic flux

dΦ = (B . A)

dΦ = ( 0.047 . 0.23 )

dΦ = 0.01081 Tm²

By substituting the given parameters, we can calculate electromotive force

ε = N . dΦ / dt

ε = 10 . 0.01081 / 0.34

ε = 0.32 volt

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The moment of inertia of the stick when it is pivoted about its midpoint is (1/6)ML². The answer choice is (B).

When the stick is pivoted about its midpoint, we can split it into two equal pieces of mass M/2 and length L/2, each with a moment of inertia of:

I₁ = (1/3)(M/2)(L/2)² = (1/12)ML²

The parallel axis theorem tells us that the moment of inertia of the whole stick about its midpoint is equal to the sum of the moments of inertia of the two pieces plus the moment of inertia of the stick as if it were a point mass at its center of mass:

I₂ = 2I₁ + (1/12)M(L/2)²

I₂ = (2/12)ML² + (1/48)ML²

I₂ = (1/6)ML²

Option B is correct.

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Answer:

tension

Explanation:

correct on edge

Answer:

Sunlight (The sun should be behind us)

Water droplets (Raindrops)

Rainbows are an optical phenomenon caused by light refracting through airborne water droplets. The angle between you, the water droplet, and the sun determines the apparent color of the water droplets. Rainbows appear to float in the sky and move as you walk. The sky is serving as a screen for an optical illusion.

The most important thing to understand about rainbows is that they are not an item or region "out there," and hence rainbows do not have a location (which is why you can never reach the end when walking toward them). They are also not arc-shaped, but rather round.

When the air is misty, each water droplet functions like a little prism, refracting light from a single point source (the sun) and dispersing colored light (unmixed single-frequency light) in all directions. The rainbow optical illusion is caused by millions of water droplets taking on a certain hue from a specific point of view. Water droplets that give color to your eyes are those that are at a specific geometric angle in space related to the sun and your specific position. They are usually far away, with the sun behind you.

A rainbow would create a complete circle if not for the earth, which cuts the circle into a half-arc. Rainbows seem to be a full circle when viewed through airplane windows.

Light from the sun behind you enters a distant water droplet, refracts at the spherical surface of the drop, reflects off the rear of the drop, and then heads your way. The refraction process divides the light so that just a small color band penetrates your eye, imparting a luminous color to the drop.

The second rainbow of a double rainbow reflects twice within the drop before reaching you, which is why it is weaker (light is lost on each reflection) and reversed in hue (the second reflection makes the color order a mirror image).

_____________________________

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Answer:

D is the Answer

Explanation:

I know D is the answer because I calculated it and got answer choice D

The nonrenewable energy source with the lowest net energy yield is b. nuclear.

Nonrenewable energy sources are resources that cannot be replenished in a short amount of time, and they will eventually run out as we continue to use them. Examples of nonrenewable energy sources include fossil fuels (coal, oil, and natural gas) and nuclear energy. Net energy yield refers to the difference between the energy output of a source and the energy input required for its production, processing, and distribution.

Among the options provided, nuclear energy has the lowest net energy yield. Although nuclear energy is a powerful source of energy, the processes involved in extracting, processing, and managing the waste produced by nuclear power plants require a significant amount of energy input. In comparison to other nonrenewable energy sources such as oil and natural gas, nuclear energy has a lower net energy yield due to the extensive resources required to maintain and operate nuclear power plants safely.

In summary, the nonrenewable energy source with the lowest net energy yield is nuclear energy, as it requires considerable energy input for extraction, processing, and waste management. This results in a lower net energy yield compared to other nonrenewable sources like oil and natural gas.

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Answer:

ok

Explanation:

OK

Potassium ions (K+) concentration of is high inside neurons at rest.  

This is due to the distribution of ions across the neuron's cell membrane, which is maintained by the sodium-potassium pump. The pump actively transports three sodium ions (Na+) out of the cell and two potassium ions (K+) into the cell, creating an imbalance in ion concentrations. This results in a negative charge inside the neuron, known as the resting membrane potential.

This potential is crucial for neuron function, as it allows the generation and propagation of action potentials or nerve impulses. When a stimulus reaches a certain threshold, it causes the opening of voltage-gated ion channels, leading to an influx of sodium ions and a change in membrane potential, this initiates the action potential, which travels along the neuron and eventually leads to the release of neurotransmitters to communicate with other cells. Maintaining a high concentration of potassium ions inside neurons at rest is essential for proper nervous system function. Potassium ions (K+)  concentration of is high inside neurons at rest.

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Answer:

The inner planets (C)

Explanation:

I hope this helps and i got this answer right on my test!!!

The particles in Figure 22.46 exhibit signs of both positive and negative charges.

In Figure 22.46, the presence of both positive and negative charges can be inferred based on the observed behavior of the particles. The interaction between charged particles can be explained through the principles of electrostatics. When two particles carry the same type of charge, they repel each other, while particles with opposite charges attract each other.

By observing the behavior of the particles in Figure 22.46, we can identify the signs of their charges. For instance, if two particles move away from each other or repel each other, it indicates that they possess the same charge. This behavior is characteristic of particles with either positive or negative charges.

Conversely, if two particles move closer together or attract each other, it suggests that they possess opposite charges. This behavior is indicative of particles with opposing charges, where one carries a positive charge and the other carries a negative charge.

It's important to note that the exact nature of the charges cannot be determined solely based on the behavior of the particles in Figure 22.46. Further information or experimental data would be required to ascertain whether the charges are positive or negative. Nevertheless, the observed repulsion and attraction between the particles provide clear indications of the presence of both positive and negative charges.

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a) The greenhouse effect refers to the process by which certain gases in the Earth's atmosphere trap and re-emit heat from the sun, leading to a warming effect on the planet's surface.

These gases, including carbon dioxide, water vapor, methane, and others, act like a blanket around the Earth, absorbing and trapping the sun's radiation and preventing it from escaping into space.

b) Atmospheric water vapor is a key component of the Earth's climate system, as it plays a crucial role in the greenhouse effect. As water vapor absorbs and re-emits radiation from the sun, it helps to trap heat in the atmosphere and keep the planet warm.

However, the amount of water vapor in the atmosphere is strongly influenced by temperature and other factors, which can in turn affect climate patterns and weather events.

c) The increased concentration of carbon dioxide in the atmosphere changes the climate because it enhances the greenhouse effect. Carbon dioxide is a particularly potent greenhouse gas, as it absorbs and re-emits radiation across a range of wavelengths, effectively trapping more heat in the atmosphere. As humans burn fossil fuels and engage in other activities that release carbon dioxide into the air, the concentration of this gas increases, leading to a buildup of heat-trapping gases and a corresponding increase in global temperatures.

d) The melting of continental glaciers and sea ice in polar regions can accelerate the rise in temperature through a process known as positive feedback. As the ice melts, it exposes more land and water, which in turn absorb more solar radiation and heat up. This leads to further melting, which exposes even more land and water, and so on.

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The reason why a dropped object only fall 5 m down and after 1 second, the speed is 10 m/s is because the acceleration due to gravity is 10 m/s².

From the question given above, we obtained the following:

Thus, we can obatin speed after 1 second as illustrated below:

v = u + gt

v = 0 + (10 × 1)

v = 0 + 10

v = 10 m/s

Thus, we can see that the speed is 10 m/s as long as the acceleration due to gravity actiing on it is 10 m/s²

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Answer:

\(F_c = \frac{KQ_1Q_2}{R^2}\)

Explanation:

Coulomb’s law is given as;

\(F_c = \frac{KQ_1Q_2}{R^2}\)

where;

F is the electric force between q₁ and q₂

k is the coulomb’s constant  = 9 x 10⁹ Nm²/C²

r is the distance between the two charges

q₁ and q₂ are the two charges

Therefore, the coulomb’s law is given as \(F_c = \frac{KQ_1Q_2}{R^2}\)

Answer:

helps to maintain the realism of the dialogue

Explanation:\

The sum of all resistances in the series circuit is known as Equivalent resistance.

where R is the equivalent resistance.

Hence, option 1 is the correct answer.

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

mass = 70 kg

acceleration = 5 m/s²

We have

force = 70 × 5 = 350

We have the final answer as

Hope this helps you

Answer:

I think ur answer might be 54 g

As 72-18=54

Hope this helps....

Answer:

A. 25 m/s

B. 100 m/s (i'm not sure about this one)

Explanation:

A. To find average velocity:  velocity = distance / time

So it would be V = 500 m / 20 sec = 25 m/s

*This equation can only be used if you are finding velocity for a constant speed or direction or specific distance (in this case it was specific distance).

B.  final velocity = initial velocity + acceleration * time

Initial velocity (5.0 m/s) and time (20 sec) is given but not acceleration.

To find acceleration: a = (final velocity - initial velocity) / time

To find final velocity = 5.0 + a * 20

Since there's a missing variable for both equation we will plug the final velocity equation into the acceleration equation so it looks like this :

a = ((5.0 + a * 2.0) - 5.0) / 20  

Now solve to get a (acceleration)

Acceleration ends up being 0. So now that we know acceleration we can solve for the final velocity.

final velocity = 5.0 + 0 * 20

= 100 m/s

I know it's a lot but I hope that makes sense! Also for B. I'm not sure if it's right at all but if later I figure out it's wrong I'll edit my answer.  

1. The vector for velocity is represented by the blue arrow, and the vector for acceleration is represented by the green arrow in the simulation.

2. a. For the object to speed up, the orientation of the vectors should be in the same direction.

b. For the object to slow down, the orientation of the vectors should be in opposite directions.

3. In the Simple Harmonic motion, the object moves back and forth in a linear path.

4. In the Circular motion, the orientation of the vectors (relative to each other) determines the turning of the object: The blue (velocity) vector should be tangent to the circular path, indicating the direction of the object's motion.

5. When attempting to move the object like a planet in orbit (an ellipse), the object must follow an elliptical path.

1. The vector for velocity is represented by the blue arrow, and the vector for acceleration is represented by the green arrow in the simulation.

2. When observing the Linear Acc 1 motion, we can determine the orientation of the vectors for the object to speed up or slow down:

a. For the object to speed up, the orientation of the vectors should be in the same direction. This means that the blue (velocity) and green (acceleration) vectors should be pointing in the same direction.

b. For the object to slow down, the orientation of the vectors should be in opposite directions. This means that the blue (velocity) and green (acceleration) vectors should be pointing in opposite directions.

3. In the Simple Harmonic motion, the object moves back and forth in a linear path. The orientation of the vectors does not play a significant role in this motion.

4. In the Circular motion, the orientation of the vectors (relative to each other) determines the turning of the object:

The blue (velocity) vector should be tangent to the circular path, indicating the direction of the object's motion. The green (acceleration) vector should be pointing towards the center of the circle, providing the centripetal acceleration necessary to maintain circular motion.

5. When attempting to move the object like a planet in orbit (an ellipse), the object must follow an elliptical path. This requires the object to continuously change its velocity vector and direction. The object must constantly accelerate towards the center of the ellipse to maintain the curved path.

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Answer:

2*F

Explanation:

If we put an object of a given size exactly at a distance 2*F from the lens, the virtual image (the image generated by the lens) will be generated at a distance 2*F from the lens and the size will be equal to the size of the real object (but the image will be inverted)

Now let's do the math.

The relation between the distance of the object to the lens O, and the distance between the image and the lens I is:

1/O + 1/I = 1/F

solving for O, we get:

1/O = 1/F - 1/I = (I - F)/(F*I)

O = F*I/(I - F)

Such that the relation between the height of the original object, H and the height of the virtual image H' is:

H/H' =  -I/O

Replacing by O we get:

H/H' = -I/(F*I/(I - F))

If the sizes are equal, then H/H' = - 1  (remember that the image is inverted, thus the sign)

-1 = -I/(F*I/(I - F))

F*I/(I - F) = I

F*I = (I - F)*I

F = (I - F)

F + F = I = 2*F

The distance between the image and the lens is 2*F

O =  F*I/(I - F) = F*2*F/(2*F - F) =  2*F

The object is at a distance 2*F from the lens.

Answer:

a c d the correct ....

Explanation:

...........

If higher-frequency standing wave in the cavity produces nodal planes with a spacing of 1.25 cm, the distance L between the walls of the cavity is 7.5cm.

The general formula for both ends closed is (n+1) λ/2

Let's say for n, \(\frac{\pi }{2} n = 1.5 = \pi = 3cm\)

for (n+1), λ(n+1)/2 = 1.25 = λ(n+1) = 2.5cm

∴ (n+1) (1.5) = (n+2)(1.25) = n = 4

∴  L = (4+1)(3/2) = L = 7.5cm.  

Electromagnetic waves, or EM waves, are waves produced by oscillations between electric and magnetic fields. In other words, EM waves consist of oscillating magnetic and electric fields. Gamma rays have the highest frequencies in the electromagnetic spectrum.

Most sunrise alarm clocks are yellow to simulate the brightness of the sun. This energizing color is the color your body naturally associates with the morning. Colors like purple and red are often used for simulating the sunset and may be more conducive to falling asleep.

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The minimum applied force that will keep the box at rest is 55 N.

The term frictional force refers to the force that opposes the motion of a body. We have the following information'

Given that;

μ = F/R

R = mgcosθ = 26.8 kg × 9.8 ms-2 × cos13 =255.9 N

F = μR

F =  0.215 × 255.9 N

F = 55 N

The minimum applied force that will keep the box at rest is 55 N.

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