Select the correct answer

1. Instruments that produce sound are called sources of light.

2. Music has no ability to heal the mental stress.

3. A medium is necessary for sound travel.

4. We hear sounds of frequencies below 20 Hz. O First answer O Second answer O Third answer O Forth answer​

The person's complete trip was a 6km round trip because they traveled 3km north and then 3km south, returning to their original location.

A trip is a journey or excursion to some destination, usually for a specific purpose. It can be as short as a day trip or as long as a round-the-world adventure. A trip typically involves travel by foot, car, railroad, boat, or airplane and often involves multiple destinations. It may also involve activities such as camping, hiking, sightseeing, and other leisure activities. Travelers usually plan trips in advance to ensure they have enough time to see and do the things they want to. Trips can also be spontaneous, with travelers deciding on the fly where to go and what to do.

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Answer:

True

Explanation:

You pay back what you owe for what youve purchased

Answer: True

Explanation:

Answer:

what does it mean

Explanation:

How can I help with your question?

The statement that the nitrogen geysers of Triton carry carbon grit into the winds of its atmosphere is false.

Triton is a moon of the planet Neptune, and it is known for its unique geological features, including nitrogen geysers. These geysers are believed to erupt from beneath the surface, expelling nitrogen gas and dust particles into space. However, there is no evidence or scientific consensus to suggest that these geysers carry carbon grit into the winds of Triton's atmosphere.

Carbon grit refers to small particles of carbonaceous material, such as soot or dust. While carbon compounds have been detected on Triton's surface, primarily in the form of organic molecules, there is no specific information or observations indicating the presence of carbon grit being transported by nitrogen geysers or carried into Triton's atmosphere.

The understanding of Triton's atmosphere and geology is based on limited direct observations, as the Voyager 2 spacecraft provided the most detailed data during its flyby in 1989. Further investigations and future missions may provide additional insights into the composition and dynamics of Triton's atmosphere and the role of geysers in its overall processes.

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The manager must be smart and able to take important decisions quickly.

A manager is an employee why has been saddled with the responsibility of overseeing the activities of other staff as well as the responsibility of taking certain important decisions for the overall good of the organization.

This means that the manager must be smart and able to take important decisions quickly. This will be important in the discharge of his duties because it will determine how the company will fare under his supervision.

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Answer:

9 x 10 ^9 yrs    ( 9 billion years <=====older than Earth !)

Explanation:

.25 = 1.0 (1/2) ^n

.25 / 1.0 =   = (1/2 )^n

log .25 =  n log 1/2

n = 2 half lives

2 * 4.5 x 10^9 =   9 x 10 ^ 9 yrs

The best type of lighting to use in a geriatric medical office is natural or daylight-like lighting.

Natural or daylight-like lighting is considered the best choice for a geriatric medical office. It closely mimics the natural light conditions found outdoors, providing a balanced spectrum of light that is beneficial for both patients and healthcare professionals.

Natural lighting has several advantages. First, it enhances visual acuity and reduces eye strain, which is particularly important for elderly patients who may have age-related vision changes. Second, it helps regulate circadian rhythms and improve sleep-wake cycles, which can positively impact overall well-being and mood. Third, natural lighting creates a more pleasant and calming environment, potentially reducing stress and anxiety for patients.

To maximize natural lighting, large windows or skylights can be incorporated into the design of the medical office. In areas where natural light is limited, artificial lighting systems that closely resemble daylight can be installed, such as full-spectrum LED lights. These lights emit a broad spectrum of colors similar to natural sunlight, promoting a more comfortable and soothing atmosphere within the geriatric medical office.

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Answer:

20kph

Explanation:

Since she travels 100kpm in 5 hours and 100 divided by 5 is 20 she would travel 20km in one hour

Hence the complete statement will be, " Sensation " occurs in the body while perception occurs in the brain.

Option D

Generally, senses acquire facts from the surroundings using the sensory receptors which eventually feed into neural inputs.

These neural impulses are then dispatched to the brain there it is prepared and interpreted for in addition evaluation which is recognized as perception.

Therefore,we have the follow statements to be true

Sensation occurs in the body

Perception occurs in the brain

Option D

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Hi there!

We can use the rotational equivalent of Newton's Second Law:

\(\huge\boxed{\Sigma \tau = I \alpha}\)

Στ = Net Torque (Nm)

I = Moment of inertia (kgm²)

α = Angular acceleration (rad/sec²)

We can plug in the given values to solve.

\(\Sigma \tau = (4 * 10^{-5})(150) = \boxed{0.006 Nm}\)

The temperature at which ingredients should be maintained when preparing any forcemeat is typically between 32°F (0°C) and 40°F (4°C). This low temperature is important for maintaining the quality and safety of the ingredients.

The ideal temperature range for preparing forcemeat is between 32°F (0°C) and 40°F (4°C).

Forcemeat is a mixture of ground or minced meat, fat, and other ingredients, often used as a filling in various dishes like sausages, terrines, or pâtés. Maintaining a low temperature during the preparation process is crucial for a couple of reasons.

Firstly, it helps to keep the fat from melting or becoming too soft, ensuring a desirable texture in the final product. This is particularly important as the fat acts as a binder, holding the forcemeat together.

Secondly, a lower temperature helps to prevent bacterial growth and keep the ingredients safe to consume.

In summary, to achieve the best results when preparing any forcemeat, it is recommended to keep the ingredients between 32°F (0°C) and 40°F (4°C).

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Answer:

The recurve bows

Explanation:Vote brainliest plz

Answer:

The ways to change the total energy are to either make the hill taller to increase it or make the hill lower to decrease the total energy.

Explanation:

The total mechanical energy of a system is the sum of the total kinetic energy and total potential energy.

When a ball is kicked, it start to feel the force of gravity acting as soon as the ball leaves the ground. At the moment the ball leaves the ground, it becomes subject to the gravitational force.

The force of gravity acts on an object continuously, regardless of its motion or position. When a ball is kicked and leaves the ground, it immediately starts to feel the force of gravity acting on it. This is because gravity is a fundamental force that attracts objects with mass towards each other.

At the moment the ball leaves the ground, it becomes subject to the gravitational force. This force causes the ball to be accelerated downward throughout its trajectory. The ball's motion is a result of the combination of the initial kick and the influence of gravity.

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Answer:

12.0 cm.

Explanation:

Answer:

both

Explanation:

Silicon

Explanation:

The chemical element of atomic number 14, a nonmetal with semiconducting properties, used in making electronic circuits. Pure silicon exists in a shiny dark gray crystalline form and as an amorphous powder

The smallest perimeter of the rectangle is of value 150 cm.

Given:

The area of the rectangle, A = 1350 cm²

Calculation:

Let the length of the rectangle be 'x'

      the breadth of the rectangle be 'y'

We know that the area of a rectangle is given as:

A = (x) × (y)  

Applying values in the above equation we get:

xy = 1350 cm²

Factorizing the value of 1350, the possible values of length and breadth of the rectangle is as listed below:

x (cm)         y (cm)

1350      ×       1

675       ×       2

450       ×       3

270       ×       5

225       ×       6

150        ×       9

135        ×       10

90         ×       15

75         ×        18

54         ×        25

50         ×        27

45         ×        30         (least possible value)

Thus, the smallest perimeter of the rectangle can be calculated as:

P = 2 (x + y)

  = 2 (45 + 30)

  = 150 cm

Therefore, the smallest perimeter that the rectangle will have is 150 cm.

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125 joules of energy are required to accelerate a 10-kg mass from rest to a speed of 5 meters per second on a horizontal, frictionless surface.

When a specific force is applied, an object accelerates less slowly the more mass it has. For instance, the acceleration is halved for a given force when an object's mass is twice.

The relationship between mass and acceleration is described by Newton's Second Law of Motion. According to his Second Law, the more mass an item has, the more force is required to accelerate it.

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A 40 kg crate is pulled at a constant velocity. The coefficient of kinetic friction is 0.5 and the crate moves 7 m . The amount of work done is 140 joule.

When an object is moved over a distance by an external force, at least a portion of that force must be applied in the direction of the displacement.

By multiplying the length of the path by the component of the force acting along the path, work can be calculated if the force is constant. The work W is equal to the force f times the distance d, or W = fd, to mathematically describe this idea.

The work is W = fd cos if the force is applied at an angle of to the displacement. Performing work on a body involves moving it in its entirety from one location to another as well as.

Therefore, A 40 kg crate is pulled at a constant velocity. The coefficient of kinetic friction is 0.5 and the crate moves 7 m . The amount of work done is 140 joule.

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Answer:

v = 98.1 m/s

Explanation:

We will apply the law of conservation of energy here, between peak A and peak B.

Total Energy of Ball at A = Total Energy of Ball at B

\(K.E_{A}+P.E_{A}=K.E_{B}+P.E_{B}\\where,\\K.E_{A} = Kinetic\ Energy\ of\ ball\ at\ Peak\ A = \frac{1}{2}mv^{2} \\K.E_{B} = Kinetic\ Energy\ of\ ball\ at\ Peak\ B = \frac{1}{2}m(0)^{2} = 0\ J (since, ball\ stops\ at\ last) \\\)

\(P.E_{A} = Potential\ Energy\ of\ ball\ at\ Peak\ A = mgh_{A}\\P.E_{B} = Potential\ Energy\ of\ ball\ at\ Peak\ B = mgh_{B}\)

\(\frac{1}{2}mv^{2} + mgh_{A} = 0\ J + mgh_{B}\\m(\frac{1}{2}v^{2} + gh_{A}) = mgh_{B}\\v = \sqrt{2g(h_{B}-h_{A})}\\where,\\h_{A} = height\ pf\ peak\ A = 5\ m\\h_{B} = height\ pf\ peak\ B = 10\ m\\v = \sqrt{2(9.81\ m/s^{2})(10\ m-5\ m)}\\\)

v = 98.1 m/s

\(\\ \sf\Rrightarrow K.E=\dfrac{1}{2}mv^2\)

\(\\ \sf\Rrightarrow K.E=\dfrac{1}{2}(40)(1)^2\)

\(\\ \sf\Rrightarrow K.E=20J\)

\(\\ \sf\Rrightarrow K.E=\dfrac{1}{2}(80)(1)^2\)

\(\\ \sf\Rrightarrow K.E=40J\)

Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher frequency.

Frequency is defined as the number of repetitions of a wave occurring waves in 1 second. Its unit is Hz. Frequency is given by the formula as,

A moving car is targeted by radio waves sent from a radar gun by a police officer standing still.

The radio waves reflected off the vehicle and picked up by the radar gun have a greater frequency than the radio waves that were transmitted.

A stationary police officer directs radio waves emitted by a radar gun at a vehicle moving toward the officer.

Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher frequency.

Hence the higher frequency is the correct answer for blanks.

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Answer:

Mass and gravity

Explanation:

\({ \rm{weight = mass \times gravity}}\)

Weight is the force exerted on an object due to gravity. The correct answer is mass and gravity. The correct option is an option  (3).

Weight requires both mass and gravity.

The formula for calculating weight is given by:

Weight = mass × gravitational acceleration

W = m × g

The gravitational acceleration is known by the strength of the gravitational field, which is typically constant at any given point.

The mass of an object and the strength of its gravitational field is its weight. It is the gravitational force that pulls an object toward the center of the Earth.

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Therefore, The correct option is (3).

The complete question is:

What does weight require?

1) gravity and volume

2) only mass

3) mass and gravity

4) mass and volume

Answer:

solution given:

frequency[f]=215.0Hz

velocity[V]=x

wave length=2.4m

we have

wave length=\( \frac{V}{f} \)

2.4m=\( \frac{x}{215} \)

2.4×215=\( \frac{x}{} \)

x=516 m/s

velocity=speed =516m/s

Answer:

516 m/s

Explanation:

Velocity = Frequency * Wavelength

If wavelength = 2.4m, and Frequency =   215 hz

Then Velocity = 2.4 * 215 which is equal to 516

Hence, velocity = 516 m/s

Answer

v= 1/R mark me brainliest pls

Answer:Hetero

Explanation: Honestly, same as the last guy said

Light will reflect at the same angle off a smooth surface as when it first touches it. The direction of reflected light beams for a flat surface is the same. Specular reflection is what is happening here.

When light reflects off of a surface, it happens. Light will reflect at the same angle it was incident upon if the surface is glossy and smooth.

A smooth polished surface is what is referred to as a reflection when a light ray strikes it and bounces back. Surface reflection occurs when a light beam hits it and then leaves it.

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Answer: The part of color that's reflected is the red that bounces off the paper.

Hope this helps you!!!

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Answer:

Option C. vi = 0

Explanation:

An object held at a particular height above the ground is considered to be at rest. If the object is release from that height, the initial velocity (vi) is considered to be zero since the object is at rest or at a stand still position.

Thus,

Initial velocity (vi) = 0