The Wave Speed On A String Is 155 M/S When The Tension Is 68.0 N . Part A What Tension Will Give A Speed Of 181 M/S ?

Answer:

lemme see

Explanation:

Answer:

Reacting to heat/cold

Explanation:

When it is hot, you will sweat.

When it is cold, you will get warm.

c: hope i help u

The current flowing in the 30 W lightbulb is 0.25 A.

The current flowing in the 60 W lightbulb is 0.5 A.

The current in each lightbulb is different since the lightbulbs are connect in parallel.

The current flowing in each lightbulb is determined by applying Ohm's law as shown below;

P = IV

where;

The current flowing in the 30 W lightbulb is calculated as;

P = IV

I = P/V

I = 30 / 120

I = 0.25 A

The current flowing in the 60 W lightbulb is calculated as;

P = IV

I = P/V

I = 60 / 120

I = 0.5 A

Thus, the current in each lightbulb is a function of power of the lightbulb and the voltage supplied to the lightbulb.

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The complete question is below:

two lightbulbs use 30 w and 60 w, respectively, when connected in parallel to a 120-v source. find the current in each lightbulb.

Answer:

The speed.

Explanation:

The slope of a line is that line's rate of change.  If a car is travelling at 20 km/hr and we plot distance vs time graph, the slope of that line will be 20.

How fast sound travels through water at sea level and how deep the ocean is  1.432 x 10³m.

Given

Bulk modulus ( B ) = 0.21 x 10¹⁰ N/ m²

density of sea le ) = 1024 kg / m³

Speed of sound In sea water ( v ) = √B/е

V =√0. 21 x 10¹⁰/1024

V = 1-.432 x 10³ m/s

The Speed of sound has to travel at the bottom of sea and get reflected back to ship itself the distance travel by Sound is 2x

So

(t = 2 see )

2x = vt

2x = 1 . 432 x 10³ x 2

x = 1.432 x 10³m

By observing the velocity of this compressed area as it passes through the medium, we can determine the speed of sound. The sound wave travels at a speed of approximately 343 meters per second, or 767 miles per hour, in dry air at 20 degrees Celsius.

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Answer:

10 seconds

Explanation:

because the cat is moving one m/s slower than the dog, the dog has a relative speed of 1 m/s. 10 meters would take 10 seconds for the dog to cover

I'm sorry, but you have not provided the options for the different bins to sort the astronomical measurements into. Please provide the full question with all the necessary information so I can assist you better.
To categorize each astronomical measurement based on the type of telescope used, it's important to understand the two main types of telescopes: refracting telescopes and reflecting telescopes. Refracting telescopes use lenses to bend light while reflecting telescopes use mirrors to reflect light.

1. Refracting Telescope:
- Measurements requiring high contrast, such as observing planets or the Moon
- Measurements of bright objects, where light-gathering power is less important

2. Reflecting Telescope:
- Measurements that require large light-gathering power, such as observing faint galaxies or nebulae
- Measurements needing high resolution, like imaging fine details on distant celestial objects

Remember to consider the specific requirements of each measurement when determining the appropriate telescope type. Refracting telescopes are often used for planetary observations while reflecting telescopes are more suitable for deep-sky objects.

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if R1 is in series with a parallel combination of R2, R3, and R4, when the resistance value of R2 increases, the voltage across R2 will Decrease.

In a parallel combination of resistors, the voltage across each resistor is the same. Therefore, an increase in the resistance of R2 would result in a decrease in the current passing through R2. Since R1 is in series with the parallel combination, the total current through the circuit will decrease, leading to a decrease in the voltage across R1 as well. However, the voltage across the other parallel resistors, R3 and R4, will remain the same as the voltage source is constant.

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the magnitude of the magnetic field midway between the two wires is 5.0 × 10−5 T. Hence, option (B) is the correct answer.

Given data:

Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions.

The wires are separated by 0.20 m.The magnetic field midway between the two wires is to be determined.Formula used:

B = (μ₀ * I * i)/(2πd)

Where,B is the magnetic field at the midpoint between two wires,μ₀ is the permeability of free space, which is equal to 4π × 10−7 T∙

m/ I is the current in the first wire, and i is the current in the second wire.d is the separation between the two wires.

Substitute the given values into the above formula,

B = (μ₀ * I * i)/(2πd) = (4π × 10−7 T∙m/A * 20 A * 5 A)/(2π * 0.20 m) = 5.0 × 10−5 T

Therefore, the magnitude of the magnetic field midway between the two wires is 5.0 × 10−5 T. Hence, option (B) is the correct answer.

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Answer:

The power of the kettle is P = 1 watt.

Explanation:

The definition of power is:

Power equals the quotient between work and time, or:

P = w/t.

In this case, we know that the work is:

w = 1J

And the time is:

t = 1 s

Then the power will be:

P = 1J/1s = 1 J/s

Also knowing that:

1 J/s = 1 W

(w is the unit for Watt)

We can conclude that the power of the kettle is:

P = 1 W

The maximum length of foil will be 6732.84 cm or 67.3284 m

To find the maximum length of the foil, the given datas are:

Width of roll of foil = 304 mm

Height or thickness = 0.019 mm

Density of foil = 2.7 g/cm³

Mass of foil = 1.05 Kg

Density is the substance's  mass per unit volume. It can be also described by measuring how the particles in the substances tightly packed together.

                              d = m/ v

v = length (l) × width (w) × height (h)

First of we will convert the Kg into gram and mm into cm.

For 1 Kg = 1000 g

1.09 × 1000 = 1090 g

For 1 cm = 10 mm

304 / 10 = 30.4 cm

0.019 / 10 =  0.0019 cm

Now we will put the values in formula:

d = m/ l× h× w

l = m / d × h× w

l = 1050 g / 2.7 g/cm³× 30.4 cm × 0.0019 cm

l = 1050 g/ 0.155952 g/cm

l = 6732.84 cm or 67.3284 m

The maximum length of foil will be 6732.84 cm or 67.3284 m

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The wavelength of the light to the width of the slit (λ/W) is approximately 1.

To find the ratio λ/W, where λ is the wavelength of the light and W is the width of the slit, we can use the formula for the angular width of the central bright fringe in a single-slit diffraction pattern.

Step 1: Write down the formula for angular width of the central bright fringe.
The angular width of the central bright fringe (θ) can be given by the formula:
θ ≈ λ/W

Step 2: Convert angular width to linear width.
To convert the angular width to linear width, we can use the formula:
Linear width (L) = Distance between screen and slit (D) × tan(θ)

Step 3: Substitute the angular width formula from Step 1.
L = D × tan(λ/W)

Step 4: Since the linear width of the central bright fringe equals the distance between the screen and the slit, we can set L = D.
D = D × tan(λ/W)

Step 5: Divide both sides of the equation by D.
1 = tan(λ/W)

Step 6: Use the small angle approximation, where for very small angles, tan(θ) ≈ θ.
1 ≈ λ/W

So, the ratio of the wavelength of the light to the width of the slit (λ/W) is approximately 1.

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From the principle of the conservation of energy, the velocity of the moving skater would be transferred to the stationary skater.

We know that according to the principle of the conservation of energy, energy can neither be created nor destroyed but we can be able to convert the energy from one form to the other. Given the fact that the energy of the object can be converted, we can also look at the collision as being an inelastic Collison.

Let us recall that a collsion is said to be in elastic if the momemtum and thge kinetic energy of the colliding particles is not conserved. The simple implication of this is that the objects would stick together and then move at a common velocity after the collision must have taken place in the system.

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Answer:

Without specific information about the land in question, it is difficult to provide a definitive answer. However, there are some general attributes of land that can make it more suitable for mining activities:

1. Mineral deposits: The presence of valuable mineral deposits, such as gold, copper, or iron, is the most obvious attribute that would make land suitable for mining.

2. Accessibility: A site that is easily accessible by roads or other transportation infrastructure would be more convenient and cost-effective for mining companies to operate.

3. Topography: Flat or gently sloping terrain can make it easier to construct mining facilities and move equipment and materials.

4. Soil type: The type of soil can affect the ease of excavation and the stability of mining operations.

5. Water resources: Availability of water for mining activities, such as processing and dust control, is essential.

6. Climate: The climate can impact the timing and duration of mining operations and the types of equipment needed to operate in certain conditions.

7. Legal and regulatory environment: The presence of favorable laws and regulations can make it easier for mining companies to operate and obtain necessary permits.

These are just a few examples of attributes that can make land more suitable for mining. However, it is important to note that mining can have significant environmental and social impacts, and these factors must also be taken into account when considering the suitability of land for mining.

Answer:

An endothermic reaction is one in which heat is transferred from the surroundings to the reactants.------- true

Answer:

T . Energy is transferred to the reactants

Explanation:

After the brakes are applied it takes 8.47s  time elapses before the toolbox strikes the cab.

The pickup truck is moving at 25 m/s with the toolbox of mass m resting on the bed of the truck 3.5 m behind the cab and the coefficient of kinetic friction between the toolbox and the bed of the truck is 0.3.

By using the equation a = (μk * g) / m

where a is the acceleration,

μk is the coefficient of kinetic friction,

g is the acceleration due to gravity (9.8 m/s2), and m is the mass of the toolbox.

By substituting the given values, we find the acceleration of the toolbox to be

a = (0.3 * 9.8) / m = 2.94 m/s2.  

Since the toolbox is initially at rest, the velocity at which it strikes the cab is equal to the final velocity of the truck, 25 m/s. To find the time it takes for the toolbox to reach the cab, we can use the equation

t = vf / a where t is the time, vf is the final velocity, and a is the acceleration found above.

By substituting the given values, we find the time it takes for the toolbox to reach the cab to be

t = 25 / 2.94 = 8.47 seconds.

Therefore, the time it takes for the toolbox to strike the cab after the brakes are applied is 8.47 seconds.

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Answer:

B.

Explanation:

The amount of momentum that an object has is dependent upon two variables: how much stuff is moving and how fast the stuff is moving. Momentum depends upon the variables mass and velocity. In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object.

The change in momentum is the mass and the change in velocity. Option E is correct.

To determine the change in an object's momentum, you need to know the object's mass and the change in its velocity. The momentum of an object is termed as the product of its mass as well as velocity. Mathematically, momentum (p) is expressed as:

p = m × v

Where:

p is the momentum,

m is mass of the object, and

v is the velocity of the object.

The change in an object's momentum (∆p) is given by the difference between its initial momentum (p₁) and its final momentum (p₂):

∆p = p₂ - p₁

Since momentum is dependent on both mass and velocity.

Hence, E. is the correct option.

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--The given question is incorrect, the correct question is

"Which quantities do you need to know in order to determine the change in an object's momentum? A. Change in time and force B. Velocity and change in time C. Acceleration and change in direction  D. Change in speed and force E)  Mass and change in velocity."--

Answer:

Explanation:

Given,

Mass ( m ) = 10 kg

Force ( f ) = 2 Newtons

Acceleration ( a ) = ?

Now, let's find the acceleration :

We know that,

\(f = ma\)

Plug the values

\(2 = 10a\)

Swap the sides of the equation

\(10a = 2\)

Divide both sides of the equation by 10

\( \frac{10a}{10} = \frac{2}{10} \)

Calculate

\(a = 0.2 \: {metre \: per \: second \: }^{2} \)

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According to special relativity, one can travel at increased rates. However, this is only possible when moving at very high speeds approaching the speed of light. When an object moves at high speeds, the time slows down, and the length of the object appears to be shortened.

These observations are known as time dilation and length contraction. Time dilation refers to the difference in the elapsed time measured by two observers, where one is stationary, and the other is moving at a constant velocity relative to each other. The faster the moving observer, the slower time appears to be for them. Length contraction, on the other hand, refers to the phenomenon where an object appears to be shorter in length when it's moving at high

This effect is more noticeable as the speed of the object approaches the speed of light. As a result, traveling at very high speeds can allow one to cover great distances in less time, which can be used for space exploration and other scientific research. However, it's worth noting that the effects of relativity are only noticeable at very high speeds, which are currently impossible to achieve with our current technology.

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Answer:

Dew point.

Explanation:

As the temperature of water vapor decreases, it will reach the point at which it turns into a liquid. This point is called dew point. The change of water from its gaseous state to liquid water is called condensation. Dew point is the temperature at which condensation happens.

The answer to the question is:

77.0 dB

When the distance from a point source of sound is doubled, the intensity level decreases by 6 dB. This decrease in intensity level with increasing distance is due to the spreading of sound waves over a larger area. According to the inverse square law, the intensity of sound is inversely proportional to the square of the distance from the source.

In this case, the distance is doubled from 2.00 m to 4.00 m. Since the distance is doubled, the intensity level will decrease by 6 dB. Therefore, we subtract 6 dB from the initial intensity level of 80.0 dB.

80.0 dB - 6 dB = 74.0 dB

So, the intensity level at a distance of 4.00 m from the source will be 74.0 dB.

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The infrared spectrum is divided into three regions: the near-infrared, mid-infrared, and far-infrared regions. Among these, the mid-infrared region is the most widely used for molecular identification. Within the mid-infrared region, the fingerprint region is considered to be the range between 4000 cm-1 to 1400 cm-1.

This range is known as the fingerprint region because it contains a unique set of absorption bands that are specific to the functional groups present in a molecule. These absorption bands are like fingerprints, which can be used to identify and differentiate between different molecules.

The fingerprint region is particularly useful in identifying complex molecules, such as proteins, carbohydrates, and nucleic acids. Therefore, the fingerprint region is an essential tool in the field of infrared spectroscopy, which is widely used in chemical and biomedical research.

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Answer:

The speed at which a planet orbits the Sun changes depending upon how far it is from the Sun. When a planet is closer to the Sun the Sun’s gravitational pull is stronger, so the planet moves faster. When a planet is further away from the sun the Sun’s gravitational pull is weaker, so the planet moves slower in its orbit.

Answer:

It would move in a line tangent to the circular path

Explanation:

As the planet orbits the sun, the angle at which the sunlight hits the planet's surface may change slightly, but this does not result in significant changes in the amount of sunlight that the planet receives.

On a planet whose rotation axis is not tilted with respect to its orbital plane, the seasons are not pronounced. This is because the amount of sunlight that the planet receives does not change significantly throughout the year.

In contrast, on a planet with a tilted rotation axis, the seasons are much more pronounced. As the planet orbits the sun, the angle at which the sunlight hits the planet's surface changes significantly, resulting in longer periods of sunlight in certain parts of the planet and shorter periods of sunlight in other parts. This leads to significant differences in temperature and weather patterns, resulting in the four distinct seasons that we experience on Earth.

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The component that is contained on an integrated circuit and can act as an electronic switch that opens or closes the circuit for electrical charges is a transistor

An integrated circuit (IC) is a tiny electronic circuit that contains various components such as resistors, capacitors, diodes, and transistors fabricated on a single semiconductor substrate. Transistors are one of the key components in an IC, and they are used to amplify or switch electronic signals.

A transistor is a three-terminal device that is made up of a semiconductor material such as silicon. The three terminals of a transistor are called the emitter, base, and collector. The base terminal is the control terminal that determines whether the transistor is conducting or not.

When a voltage is applied to the base terminal, it controls the flow of current between the emitter and collector terminals. The transistor can be used as an electronic switch by applying a small current or voltage to the base terminal. This causes the transistor to either conduct or not conduct current between the emitter and collector terminals, effectively opening or closing the circuit for electrical charges.

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Answer:

2.05 x 108 mi

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