laser light is commonly used to measure distances. a. true b. false

Answer:

and the power to which the number should be raised:

1.50E2 = 1500

4.167E4 = 41,760

4.167E-4 = .0004176

Mass of the earth = 5.98 * 10^24 kg = 5.98E24 kg

Some examples of scientific notation

Answer:

hey Army

I'm B.T.S Army

안녕하세요

The formula of a spring-mass-damper system is given by md2x/dt2 + cdx/dt + kx = F(t).

The spring-mass-damper system is a common model used in physics and engineering to describe the behavior of various mechanical systems, such as a car suspension system or a building during an earthquake. The equation of motion for a spring-mass-damper system is typically given by:

md2x/dt2 + cdx/dt + kx = F(t)

where m is the mass of the object attached to the spring and damper, x is the displacement of the mass from its equilibrium position, t is time, c is the damping coefficient, k is the spring constant, and F(t) is an external force applied to the system at time t.

The term md2x/dt2 represents the acceleration of the mass, while cdx/dt represents the damping force (i.e. resistance to motion) caused by the damper, and kx represents the force exerted by the spring. The external force F(t) can be any force applied to the system, such as an oscillating force or a constant force.

The solution to this differential equation depends on the initial conditions (i.e. the initial position and velocity of the mass) and the specific values of the parameters m, c, and k. The behavior of the system can be analyzed using various techniques, such as finding the natural frequency of the system or using numerical simulations to model the motion over time.

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Answer:

d

Explanation:

The term refers to how loud or soft a sound will be wavelength. Then the correct option is A.

In physics, math, and related fields, a wave is a dynamic disturbance of one or more variables that spreads. Waves are referred to as periodic when they oscillate repeatedly around an equilibrium value at a specific frequency.

The wave can be represented as,

f(x) = A sin (ωt + ∅)

Where 'A' is the amplitude, 'ω' is the frequency, 't' is the time period, and '∅' is the phase difference.

Depending on the medium that it is moving through, sound has a wide range of speeds. The stiffness of the medium (or compressibility in the case of gases) and its density work together to define the speed of sound in that medium. The speed of sound increases with the rigidity (or lack of compressibility) of the medium.

If the amplitude is high then the voice is loud. Similarly, if the amplitude is low then the voice is soft.

The wave

The phrase describes a sound's wavelength, or how loud or soft it will be. Then, choice A is the best one.

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Answer:

rotation

Explanation:

............................

Answer: 2nd option, Rotation

I hope this helps, and Stay Safe! :)

A star is considered circumpolar if it remains above the horizon throughout the entire night. The greatest distance that a star can be from Polaris, the North Star, and still be circumpolar is 50°.

Circumpolar stars are those that do not set below the horizon but instead appear to revolve around the celestial pole. In the northern hemisphere, Polaris serves as the North Star, located very close to the celestial north pole.

For a star to be circumpolar as seen from Philadelphia (latitude 40.0°), it must remain above the horizon at all times during the night.

The distance between Polaris and the celestial pole is equivalent to the observer's latitude. In this case, since the latitude of Philadelphia is 40.0°, any star within 40.0° of Polaris will be circumpolar.

Therefore, the greatest distance a star can be from Polaris and still be circumpolar is 40.0° + 10.0° (as the North Star is approximately 10.0° away from the celestial pole), giving a total of 50.0°.

Any star within this range, up to 50.0° from Polaris, will never dip below the horizon and will remain visible throughout the entire night as a circumpolar star.

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Answer:

i) O m/s² as velocity is constant

ii) 20m/s

iii)Hint:Calculate the area of the graph,that is;below the line, for the first 15 seconds only

Hope this helps.

With an astronomical telescope, the angle of just resolution light from two stars would be greater if the light of the average star is red or if it is blue.

What is an astronomical telescope?

An astronomical telescope consists of two lenses: objective and eyepiece.

The objective lens forms the image of a far off object at focal point while eyepiece lens just magnifies the image and make it look more clear, visible and magnified.

The formula D = 1.22λ/dФ is used to find the value of aperture of the telescope.

In general, an astronomical telescope is used to view distant stars. Thus, the angle formed would be greater if the light emitted by the average stars is red or blue.

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Answer:

46

Explanation:

v = at   so 4.6 x 10 = 46

a) Two other forces that act on thee sled are the weight of the daughter and the drag force

b) The drag force slows down the sled while the weight presses it down.

We know that motion is the result of the action of unbalanced forces. From the Newton's third law, we know that if the forces that are acting on an object are balanced that the object is not going to move from its state of rest.

In this case, we are told that a  father pushes his daughter and son on a sled down a hill. The fact that the led is moving is due to the fact that there are forces that are acting on the sled.

The forces that are acting on the sled apart  from the force that was applied in pushing the sled is the drag force and the weight of the son.

The drag force would determine how fast that the sled would move because it acts in opposition to the forward force and tries to slow down the sled as it is moving. The weight of the son does press the sled downwards.

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Touching a doorknob after rubbing shoes on the carpet produces a shock because of static electricity. When you rub your shoes on the carpet, you create a buildup of static electricity. This occurs due to the transfer of electrons between the carpet and your shoes. Electrons are negatively charged particles that move from one object to another during the rubbing process. As a result, your shoes become negatively charged and the carpet becomes positively charged.

When you touch a doorknob, which is typically made of metal, the electrons flow from your body to the doorknob. This flow of electrons creates a sudden discharge of electricity, which produces a shock. The shock you feel is the result of the electrical charge equalizing between your body and the doorknob.

To describe the shock sensation, it usually feels like a sudden jolt or tingle that can range from mild to uncomfortable. The shock can also produce a small spark, which you may see or hear when touching the doorknob.

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The expression for the charge on a capacitor can be expressed as Q = C × V, where Q is the charge, C is the capacitance, and V is the potential difference. A capacitor is charged to a potential difference V when a charge Q is stored on its plates.

Let’s solve this problem using the above equation.  We can calculate the charge on the capacitor in the given problem using the below equation Q = C × V Where Q = charge on the capacitor = ?C = capacitance = 4 µF = 4 × 10⁻⁶FV = potential difference across the capacitor = emf of battery = 120 VQ = C × V = 4 × 10⁻⁶ × 120= 0.00048 C or 480 µC Therefore, the magnitude of the charge on the capacitor is 480 μC.Option C is correct.

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The combined amplitude of two identical waves of amplitude 5 cm depends on whether the interference is constructive or destructive.

Constructive Interference: When two waves interfere constructively, their amplitude increases. In this scenario the combined waveform will have an amplitude equal to the sum of the individual amplitudes if the two waveforms are in phase (crest aligns with crest and trough aligns with trough). Consequently, in constructive interference, the amplitude of the combined wave will be 5 cm + 5 cm = 10 cm.

Destructive Interference : Interference that is destructive occurs when two waves interact in a way that cancels out each other's amplitudes. The amplitude of the combined waveform will be equal to the difference between the individual amplitudes in this case if the two waveforms are out of phase (peak aligned with trough). In destructive interference, the amplitude of the combined wave will be 5 cm – 5 cm = 0 cm.

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Answer:

3V

Explanation:

From the question given above, we can see clearly that the resistors are arranged in parallel connection. Hence, the same voltage will pass through the resistors i.e

Total voltage = voltage of 3 Ω = voltage of 6 Ω

From the question given above,

The total voltage = 3 V

Therefore,

Voltage of 3 Ω = total voltage

Voltage of 3 Ω = 3V

Thus, option 3 gives the correct answer to the question.

Answer:

All options except fur color of palomino horses and blood type

Answer:

A, B, D, and E

Explanation:

Explanation:

I hope this really can help you...

well done friend...

Answer:

The runner's acceleration was \(1\ m/s^2\)

Explanation:

Constant Acceleration Motion

It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

\(v_f=v_o+at\)

Solving for a:

\(\displaystyle a=\frac{v_f-v_o}{t}\)

The runner speeds up from vo=5 m/s to vf=9 m/s in t=4 seconds, thus:

\(\displaystyle a=\frac{9-5}{4}\)

\(\displaystyle a=\frac{4}{4}=1\)

The runner's acceleration was \(1\ m/s^2\)

Option (C) is Correct. The change in enthalpy, or H, is not directly measured by the bomb calorimeter. As a result, the assertion is False.

Therefore, a constant-volume calorimeter, such as the bomb calorimeter (A device used to measure energy changes in chemical processes), is used to measure the enthalpy changes that precede combustion reactions. The cross calorific value of the solid and liquid samples was determined using the Bomb Calorimeter (Model-IKA C2000).

It is a calorimeter of the constant-volume kind that measures the heat of a specific reaction or the calorific value of the fuels. An apparatus known as a bomb calorimeter is used to measure the heat of reaction at a constant volume and the measured heat, also known as the change of internal energy (E).

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In the DSM-5, each of the following has been assigned as an obsessive-compulsive-related disorder EXCEPT impulse-control disorder.

The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) includes a section on obsessive-compulsive and related disorders. The section contains eight different disorders, each with its own criteria.

In the DSM-5, each of the following has been assigned as an obsessive-compulsive-related disorder except for the impulse-control disorder.

Impulse-control disorder is not listed as an obsessive-compulsive-related disorder in DSM-5, and it is a separate condition. The DSM-5 classified Impulse-Control Disorder as an impulse-control disorder and not as an obsessive-compulsive-related disorder. It is an impulse control disorder characterized by an inability to resist the impulse, drive, or temptation to perform an act that is dangerous to oneself or others.In the DSM-5, the following are obsessive-compulsive-related disorders:

Obsessive-Compulsive Disorder (OCD)

Body Dysmorphic Disorder (BDD)

Trichotillomania (Hair-Pulling Disorder)

Excoriation (Skin-Picking) Disorder

Hoarding Disorder

Substance/Medication-Induced Obsessive-Compulsive

The DSM-5 is the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders. It is a manual used by mental health professionals to diagnose mental illnesses. In DSM-5, each of the following has been assigned as an obsessive-compulsive-related disorder except impulse-control disorder. The DSM-5 classified impulse control disorder as an impulse control disorder and not as an obsessive-compulsive-related disorder.

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True. When a raceway is used for the support or protection of cables for fire alarm circuits, a bushing to reduce the potential for abrasion shall be placed at the location the cable emerge from the raceway.

This is required by the National Electrical Code (NEC) to ensure the safety and reliability of the fire alarm system. The bushing helps to protect the cable from damage and abrasion that could cause a short circuit or other malfunction in the system.

It is important to follow all NEC requirements when installing fire alarm circuits to ensure the system operates as intended in the event of a fire.

When a raceway is used for the support or protection of cables for fire alarm circuits, a bushing should be placed at the location where the cable emerges from the raceway to reduce the potential for abrasion. This ensures cable integrity and proper functioning of the fire alarm system.

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The magnitude of the torque exerted by the jack is equal to 16778.33 N.m.

Torque can be defined as the measurement of the force that can cause the rotation of a body about an axis. The force exerted can cause an object to accelerate, in the same way, torque causes angular acceleration. Therefore, torque can be defined as the rotational equivalent of linear force.

Given, the mass of the car, m = 1130 Kg

The length of the car, L = 3.05 m

The angle made of the car with the horizontal, θ = 8.0°

To maintain the static equilibrium of the car, we need:

\(\displaystyle \tau _{jack } =\tau _{weight}\)

\(\displaystyle \tau _{jack } =mg\times (3.05- 1.12-0.40)\times cos\theta\)

\(\displaystyle \tau _{jack } =1130\times 9.8 \times 1.53\times cos(8)\)

\(\displaystyle \tau _{jack } =16778.33 Nm\)

Therefore, the magnitude of the torque is 16778.33 Nm.

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Answer:

Scientists use many skills as they investigate the world around them. They make observations by gathering information with

their senses. Some observations are simple. For example, a simple observation would be figuring out the color or texture of

an object. However, if scientists want to know more about a substance, they may need to take measurements.

Measurement is perhaps one of the most fundamental concepts in science. Without the ability to measure, it would be

difficult for scientists to conduct experiments or form theories. Not only is measurement important in science and the

chemical industry, it is also essential in farming, engineering, construction, manufacturing, commerce, and numerous

other occupations and activities.

The word “measurement” comes from the Greek word “metron,” which means “limited proportion.” Measurement is a

technique in which properties of an object are determined by comparing them to a standard.

Measurements require tools and provide scientists with a quantity. A quantity describes how much of something there is or

how many there are. A good example of measurement is using a ruler to find the length of an object. The object is

whatever you are measuring, the property you are trying to determine is the object’s length, and the standard you are

comparing the object’s length to is the ruler.

In general, scientists use a system of measurement still commonly referred to as the “metric system.” The metric system

was developed in France in the 1790s and was the first standardized system of measurement. Before that time, people

used a variety of measurement systems.

In 1960, the metric system was revised, simplified, and renamed the Système International d’Unites (International

System of Units) or SI system (meters, kilograms, etc.). This system is the standard form of measurement in almost

every country around the world, except for the United States, which uses the U.S. customary units system (inches,

quarts, etc.). The SI system is, however, the standard system used by scientists worldwide, including those in the

United States.

There are several properties of matter that scientists need to measure, but the most common properties are length and mass.

Length is a measure of how long an object is, and mass is a measure of how much matter is in an object. Mass and length

are classified as base units, meaning that they are independent of all other units. In the SI system, each unit of measure has

a base unit.

Explanation:

Some things scientists want to measure may be very large or very small. The SI, or metric, system is based on the

principle that all quantities of a measured property have the same units, allowing scientists to easily convert large and

small numbers. To work with such large or small numbers, scientists use metric prefixes. Prefixes can be added to base

units and make the value of the unit larger or smaller. For example, all masses are measured in grams, but adding

prefixes, such as milli- or kilo-, alters the amount. Measuring a human’s mass in grams would not make much sense

because the measurement would be such a large number. Instead, scientists use kilograms because it is easier to write

and say that a human has a mass of 90 kilograms than a mass of 90,000 grams. Likewise, one kilometer is 1,000 meters,

while one millimeter is 0.001 meters. The table below lists some common prefixes and the quantities they represent.

Answer:

C. sedimentary

Explanation:

Answer:

Sedimentary

Explanation:

Igneous rock- A rock that's formed through the cooling and solidification of magma or lava.

Metamorphic rock- A rock that starts out as another rock and often has a striped appearance.

Volcanic rock- A rock that's formed from lava that erupted from a volcano.

Sedimentary is the only right answer. A Sedimentary rock is a rock thats made from the deposition of lots of pieces of eroded rock particles.

The generator must turn at a speed of 77.8 radians per second to produce a peak output of 120 V in a 0.550 T magnetic field.

The peak voltage output of a generator can be calculated using the formula:

\(Vpeak = NBAw\)

where:

Vpeak is the peak voltage output.

N is the number of turns in the coil

B is the magnetic field strength

A is the area of the coil

ω is the angular velocity of the coil

In this case, the coil has 300 turns and is 25.0 cm on a side, so its area is:

\(A = (25.0cm)^{2} = 0.0625 m^{2}\)

The magnetic field strength is 0.550 T, and we want to find the angular velocity ω at which the generator must turn to produce a peak output of 120 V. Rearranging the formula above, we get:

ω = Vpeak / NBA

Substituting the given values, we get:

\(w = (120V) / (300 turns * 0.0625m^{2}* 0.550T) = 77.8 rad/s\)

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The wavelength (in feet) of the sound wave with a velocity of 1125 ft/s and a frequency of 600 Hz is 1.88 ft

The velocity of a wave is related to its frequency and wavelength according to the following equation:

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

From the question given, the following data were obtained:

The wavelength of the wave can be obtained as follow:

v = λf

Divide both sides by f

λ = v / f

λ = 1125 / 600

λ = 1.88 ft

Thus, the wavelegth of the wave is 1.88 ft

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Answer:

u =0m/sec

acceleration = 5 m/s ^2

s = 4.75m

by using the third equation of motion

v^2 - u.^2 = 2as

v^2 - 0 = 2 * 0.5 * 4.75

so v^2 = 4.75

so v = 2.17m/sec

this is the answer

Answer:

I'm pretty sure it is Edwin Powell Hubble and Albert Einstein

Explanation:

Answer:

using a seismograph

Explanation:

The force in the rightward direction, fx , should Marcel push is this force leads to counterclockwise torque. Fx = - (w L2 + w L3 - W Lend) / h.

A force in physics is an effect that changes the velocity, or acceleration, of a mass-moving object. It is a vector quantity since it can be a push or a pull and always has magnitude and direction.

Viewing equilibrium of torque:

W Lend + Fx × h = w L2 + wL3

Fx = (w L2 + w L3 - WLend) / h

In the rightward direction, Fx,

Fx = - (w L2 + w L3 - W Lend) / h

Thus, this force leads to counterclockwise torque.

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The given question is incomplete, so the most probable complete question is,

With what force in the rightward direction, fx , should Marcel push? if your expression would give a negative result (using actual values) that just means the force should be toward the left.

The image of the question is attached below.

Dual convex lenses follow a set of rules that govern their behavior when light passes through them. These rules include:

1. The incoming light rays are refracted (bent) at the first lens surface, causing them to converge towards the optical axis.

2. The converging light rays then pass through the second lens surface and are refracted again, causing them to diverge away from the optical axis.

3. The point where the refracted light rays converge or diverge is known as the focal point.

4. The distance between the lens and the focal point is known as the focal length.

5. The magnification of the image formed by the lens is determined by the ratio of the distance between the object and the lens (object distance) to the distance between the image and the lens (image distance).

Overall, dual convex lenses are powerful tools for bending and focusing light, and they play a crucial role in many fields, from medicine to astronomy.

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