True or False. Light is a form of energy.
true or false
ASAP 10 POINTS
IF WRONG I WILL REPORT

To find the Thevenin voltage (VTh) without using Kirchhoff's voltage law (KVL) or Kirchhoff's current law (KCL), we can apply the voltage divider rule. The voltage divider rule states that the voltage across a resistor in a series circuit is proportional to its resistance.

In Figure 8-82, we need to determine the current through the load RL. To do this, we first find the Thevenin voltage (VTh) which is the open-circuit voltage across the load terminals. Here's how we can find it using the voltage divider rule:

Identify the two resistors in series: The 5.6 kQ resistor and the 15 kQ resistor.
Calculate the total resistance (RT) of the series combination: RT = 5.6 kQ + 15 kQ = 20.6 kQ.
Identify the resistor across which you want to find the voltage: In this case, it is the 15 kQ resistor.
Apply the voltage divider rule: \(VTh = (R2 / (R1 + R2)) * VSource\).
  - Substitute the values: \(VTh = (15 kQ / (5.6 kQ + 15 kQ)) * 32 V\).
  - Simplify the expression:\(VTh = (15 kQ / 20.6 kQ) * 32 V\).
  - Calculate VTh:\(VTh ≈ 23.44 V\).
Therefore, the Thevenin voltage (VTh) is approximately 23.44 V.
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Answer:

H = 1/2 g t^2      time to fall H

t = (2 H / g)^12 = (2 * 2 / 9.80)^1/2 = .639 sec

Sx = Vx * t = 9 m/s * .639 s = 5.75 m      horizontal distance traveled

A. Hypothesis (What do you believe will happen?) People who increased their caloric intake by 1000 calories per day are more likely to develop hypertension (high blood pressure).

Hypothesis is a process of generating testable predictions about a certain phenomenon. It is an educated guess or explanation of a certain phenomenon, based on available facts and evidence. It is the starting point for further investigation and helps to determine the outcome of a scientific experiment. Hypothesis helps to develop a framework of understanding and can be used to create further predictions. It is an essential step in the scientific method, as it helps to structure an experiment and provide a basis for further evaluation.

B. Experiment (Procedures that lead to a discovery or test a hypothesis.) An experimental group of 20 subjects will consume an extra 1000 calories per day from fast food, in addition to their normal daily caloric intake. A control group of 20 subjects will not consume an extra 1000 calories from fast food and will continue with their normal diet. The blood pressure of each subject in both groups will be recorded once per week for eight weeks.

C. Results (The outcome of the experiment.) After eight weeks, 70% of subjects in the experimental group had developed hypertension. In the control group, only 5% of subjects developed hypertension. The hypothesis was supported by the data; the increased intake of calories in the experimental group increased the likelihood of developing hypertension.

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Answer:

The helicopter will land 250 km east of Ulaanbaatar. Is there anything else you would like to know?

Answer:

Explanation:

The efficiency of a Bulb = Total Useful Energy/ Total Energy Supplied

Here in this particular case, Total Useful Energy is actually Light produced in Joules.

Therefore, Efficiency of the bulb = 290/470

=0.6170 or 61.70%

Answer:

  15.8 N

Explanation:

The component in a given direction is the magnitude of the applied force, multiplied by the cosine of the angle between its application and the direction of interest.

The horizontal component is ...

  (20 N)cos(38°) ≈ 15.8 N

A string exerts a force of 20 N on a box at an angle of 38° from the horizontal. What is the horizontal component of the force on the box?

15.8 N

The energy gained by the cold water stream can be calculated using the equation: Q_cold = m_cold * C_cold * (T_mixture - T_cold)

Q_hot = m_hot * C_hot * (T_hot - T_mixture)

Q_hot is the energy lost by the hot water stream

m_hot is the mass flow rate of the hot water stream (given as 0.5 kg/s)

C_hot is the specific heat capacity of water (approximately 4,186 J/kg°C)

T_hot is the initial temperature of the hot water stream (80°C)

Since the energy gained by the cold water stream must be equal to the energy lost by the hot water stream, we can set up the following equation:

m_cold * C_cold * (T_mixture - T_cold) = m_hot * C_hot * (T_hot - T_mixture)

Now we can solve for m_cold:

m_cold = (0.5 * 4,186 * (80 - 42)) / (4,186 * (42 - 20))

m_cold ≈ 0.25 kg/s

Therefore, the mass flow rate of the cold water stream should be approximately 0.25 kg/s to achieve the desired mixture temperature of 42°C.

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Answer:

about 100,000 light years away

Explanation:

It's where our solar system is. Scientists gave it that name because it looks like someone spilled a glass of milk.

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Answer:

i believe

Explanation:

i do

i believe in themmm

The mean free time between collisions for aluminum wire is

1.62 * 10^-20 s and the mean free time between collisions for Iron is

1.68 * 10^-20 s.

Electrons are subatomic particles that carry a negative electrical charge. They are found outside the nucleus of an atom and are responsible for chemical reactions, electrical conductivity, and magnetism.

The mean free time between collisions for electrons in a metal wire can be calculated using the mean free path (λ) and the electron density (n) of the metal. The mean free time between collisions is given by the equation:

τ = λ / v

Where τ is the mean free time, λ is the mean free path, and v is the velocity of the electrons.

Using the formula, we can calculate mean free path:

λ = 1 / (n * σ)

Where σ is the collision cross-section, which is a measure of how likely it is for an electron to collide with an atom in the metal.

For aluminum, the mean free path is approximately:

λ = 1 / (n * σ) = 1 / (8.49 * 10^28 * 2.82 * 10^-15) = 3.51 * 10^-14 m

For aluminum, the mean free time between collisions is:

τ = λ / v = 3.51 * 10^-14 m / (2.18 * 10^6 m/s) = 1.62 * 10^-20 s

For Iron, the mean free path is approximately:

λ = 1 / (n * σ) = 1 / (8.05 * 10^28 * 2.82 * 10^-15) = 3.65 * 10^-14 m

For Iron, the mean free time between collisions is:

τ = λ / v = 3.65 * 10^-14 m / (2.18 * 10^6 m/s) = 1.68 * 10^-20 s

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Answer:

B. chromosphere

Explanation:

Immediately above the Sun's photosphere is the _______, which is the Sun's lower atmosphere. A. core B. chromosphere C. corona D. solar wind

Answer:

0_8.0

8.0m/s

Explanation:

8.0m/s is the velocity of an object .

The force that is needed to accelerate the arrow is 49 Newtons.

To determine magnitude of the force needed to give a 0.25 kg arrow an acceleration of 196 m/s², we can use the equation of force:

F = ma

where F is the force, m is the mass, and a is the acceleration.

Given that m = 0.25 kg and a = 196 m/s², we can substitute these values into the equation and solve for F:

F = (0.25 kg)(196 m/s²)

F = 49 N

So the force needed to give a 0.25 kg arrow an acceleration of 196 m/s² is 49 N. This is the correct answer out of the options given.

To arrive at this answer we used Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. Thus, we were able to use the equation "F = ma" (where F is force, m is mass and a is acceleration) to solve for the force required to accelerate the arrow at 196 m/s².

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Answer:

okay here's how

Explanation:

so if the badgers eat the wildflowers, they are keeping them producing at a considerablly contact rate, but if all of the badgers were eliminated there would be nothing to controll the wild flowers, so there would be a huge wild flower boom (huge increase of flowers/ wild flower population, that would probably eventually over run the space that they are in)

calcium (ca) is most likely to be shiny

Among all the options, the element which is most likely to be shiny is calcium. Hence, option C is correct.

A pure material made entirely of one species of atoms, or a chemical element, has a specific number of protons in its nucleus. Chemical elements, in contrast to compounds, can indeed be subdivided into less complex molecules through any chemical process.

The distinguishing characteristic of an element is the number of protons in the nucleus, which is known as its atomic number; all atoms with the same atomic number are the same element's atoms.

The majority of the universe's baryons mass is made up of chemical components (among rare exceptions are neutron stars). Atoms are reorganized into new compounds, bound together through chemical bonds during chemical reactions between various elements.

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Answer:

a) 9.213 m/s²

b) 203.189m

Explanation:

a) a=v-u

t

b) s=ut+1/2at²

Answer:

b

Explanation:

The Coriolis effect is a condition which causes a hurricane to rotate in a particular direction. Thus, the correct option is B.

Hurricanes are the enormous storms which come with a rotating wind speed of about 74 miles per hour. The rotating wind that swirls across the warm water of the tropics and also comes with a terrifying force.

The Coriolis force is an inertial or the fictitious force, which acts on the objects which are in motion within a frame of reference that rotates them with respect to an inertial frame. In a reference frame, with the clockwise rotation, the force acts to the left of the motion of the object. Whereas, in one with anticlockwise or counterclockwise rotation, the force acts to the right of the object. The deflection of an object due to this Coriolis force is called as the Coriolis effect.

Therefore, the correct option is B.

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One research finding about the effects of physical attractiveness is that it can lead to the "halo effect," where people assume attractive individuals possess other positive qualities such as intelligence and kindness.

Physical attractiveness has been found to have a significant impact on social interaction and perceptions. One research finding is the "halo effect," which is a cognitive bias where people assume that attractive individuals possess other positive qualities such as intelligence and kindness, even without evidence to support these assumptions. This phenomenon has been observed in various contexts, including employment, education, and interpersonal relationships. For example, studies have shown that attractive job candidates are more likely to be hired, and attractive students receive higher grades and more positive evaluations from teachers. Additionally, attractive individuals are often perceived as more likable, trustworthy, and competent, leading to more favorable treatment and social outcomes. However, this bias can also have negative consequences, such as overlooking negative traits in attractive individuals or discriminating against those who are less physically attractive.

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"Microwave transmission systems are used for high volume, long distance, line-of-sight communications."

Microwave is a line-of-sight wireless communication technology that uses high frequency beams of radio waves to provide high speed wireless connections that can send and receive voice, video, and data information.

Due to their small wavelength and ability to be focused into narrow beams that may be targeted directly at the receiving antenna, microwave links are frequently employed for point-to-point communications. As opposed to lower frequency radio waves, which interfere with one other, this enables neighbouring microwave equipment to operate on the same frequencies.

Another benefit is that the microwave band has a very high information-carrying capacity due to its high frequency; its bandwidth is 30 times greater than that of the radio spectrum below it.

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Answer:

Because of the given stranded wires is that it's thinner there are even more air gaps and a greater surface area in the individual stranded wires then therefore it carries less current than similar solid wires can with each type of wire , insulations technologies can greatly assist in reducing power dissipation.

Answer:

Explanation:

m = 1500 kg

u = 15 m/s

v  = 25 m/s

s = 100 m

\(v^{2} = u^{2} + 2as\)

\(25^{2} = 15^{2} + 2a\) × 100

625 = 225 + 200 a

-200a = 225 - 625

-200a = -400

a = 400 / 200

a = 2 m/s

f = ma

f = 1500 × 2

= 3000 N

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Answer:

The x represents the reference point on a motion map

Explanation:

-Motion maps are another way to represent the motion of an object. (other representations are graphical and mathematical models)

Answer:

The x represents the reference point on a motion map. Explanation; -Motion maps are another way to represent the motion of an object. (other representations are graphical and mathematical models).

Explanation:

Answer:

the angle of reflection also increases

Explanation:

this is because the law of reflection states that the angle of incidence equals to the angle of reflection, thus, if the angle of incidence increases, angle of reflection should also increase, basically , think as if the angle of incidence is the same thing as the angle of reflection

hope this helps, if not please report it someone else can try it

Answer:

The functionality of a body can be restored with the help of appropriate flexibility and strengthening. Once everything is in place, you can exercise those muscles specifically for balance to put them to the test. Your body may then adjust, improving your general stability as you get better at completing those activities.

Answer:

The stability of an object is increased when the lower the centre of gravity is.

So we should try to lower the centre of gravity.

Direct observations of the stars in its orbit, X-rays from material falling in, and powerful radio emission from accretion disk region are among the evidence for it.

As matter is pulled by a powerful gravitational force, like a star or a black hole, a flattened, circular and elliptical shape called an accretion disk is created.

He observes that black holes frequently contain accretion rings made up of hot gas as well as other stuff; such a disk would theoretically offer a planet the energy and light necessary for life to exist.

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The distance b is twice the distance a.

The electric force between two point charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them, according to Coulomb's law.

Let's assume the charges are q1 and q2. According to the problem, when the charges are separated by distance a, the electric force is 4 times greater than when they are separated by distance b.

So we can write the equation as:
( Fa = k {q1 q2/a²} )
( Fb = k {q1 q2/b²} )
where ( Fa ) is the electric force when separated by distance a, and ( Fb ) is the electric force when separated by distance b.

Given that ( Fa) is 4 times greater than ( Fb ), we have:
4Fb = k {q1 q2/a²}
Dividing both sides by 4, we get:
Fb = k { q1 q2/4a²}

Comparing this equation to the equation for ( Fb ), we can see that the denominator is the same. Therefore, the distance b must be twice the distance a.

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The correct option provided is option C) 5.7 m/s^2

When the rope is holding the rock, the tension force in the rope opposes the weight of the rock and the net force acting on the rock is zero. When the rope breaks, the tension force becomes zero and the weight of the rock is the only force acting on it.

The weight of the rock can be resolved into two components, one parallel to the inclined plane and one perpendicular to it. The component parallel to the inclined plane will cause the rock to accelerate down the plane.

The magnitude of the component of the weight parallel to the inclined plane is given by Wsinθ, where W is the weight of the rock and θ is the angle of the inclined plane with respect to the horizontal.

a = (Wsinθ)/m

where m is the mass of the rock.

Substituting the values, we get:

a = (10 kg) * sin(30°)/10 kg = 5 m/s^2

Therefore, the magnitude of the acceleration of the rock down the inclined plane if the rope breaks is 5 m/s^2.

The closest option provided is option C) 5.7 m/s^2.

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Answer:

In physics, motion is the phenomenon in which an object changes its position with respect to time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed

Explanation:

I got this off internet. Hope it helps!