What do you think are some differences between sound waves traveling through air versus traveling through water?

Answer:

Inertia.

Explanation:

You are moving with a speed of 1 m/s. You are carrying a tray and the ball is at rest in the tray. You stops and the ball rolls off the tray. Whenever you starts moving with a speed of 1 m/s and when ball is at rest, due to inertia of motion the ball comes in motion. But when you stops, the ball is still in motion due to its inertia.

Hence, due to inertia the ball roll off the tray.

The statement which accurately describes the mass of the watermelon is:

The mass of the watermelon is greater than 2 kg.

Option c is the correct answer

Fundamental quantities are the quantities which forms the basic unit of measurement. In order words, these are the quantities upon which other quantities and units are derived from.

The three examples of fundamental quantities are:

Other examples of fundamental quantities are:

So therefore, the statement which accurately describes the mass of the watermelon is:

The mass of the watermelon is greater than 2 kg.

Complete question:

Compare the mass of the two objects.

Which statement accurately describes the mass of the watermelon?

a. The mass of the watermelon is less than 2 kg.

b. The mass of the watermelon is equal to 2 kg.

c. The mass of the watermelon is greater than 2 kg.

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Hello,

✔ We have : a = v/Δt

The car's acceleration is therefore 6 m/s².

Parallax is the apparent shift in the position of an object when viewed from different angles. In the case of the two pencils, if they are moved closer together and observed while moving the head, there will be an apparent relative motion between them due to parallax.

To eliminate this parallax and have no apparent relative motion between the two pencils, they must be at a distance where the angle between the two pencils, as seen from each eye, is so small that the difference in the positions of the pencils appears to be negligible.

This distance is called the distance of the pencils' separation. It is the distance between the two pencils that makes the angle between them too small to cause parallax. To determine the distance of the pencils' separation, we can use the formula:

Distance of separation = (distance between eyes x distance of the closest pencil) / (distance of the farthest pencil - distance of the closest pencil)

The distance between eyes is typically around 6.5cm for an average adult. Let's say the closest pencil is 10cm away from the eyes, and the farthest pencil is 11cm away. Plugging these values into the formula, we get:

Distance of separation = (6.5cm x 10cm) / (11cm - 10cm) = 65cm

Therefore, the pencils must be placed at a distance of 65cm apart from each other to eliminate parallax and have no apparent relative motion between them.

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Using the idea of work done under gravity, the height of the building is 187 m.

We must recall that the work done in a gravitational field is given by; mgh

m= mass

g = acceleration due to gravity

h = height

mass = 60.0 kg

Workdone = 1.15x10^5 J

W = mgh

h = W/mg

h =  1.15x10^5 J/60.0 kg * 9.8 ms-2

h = 187 m

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Answer:

a) -113 N/C

b) -423.71 V

Explanation:

The Step by step explanation and solution has been attached in the attachment section.

Answer: it’s c

Explanation:

Answer:

Force = mass x acceleration

= 30 x 2 = 60 N

Explanation:

electricity is the flow of electrical power or charge

Explanation:

the flow of current is called electricity

Eddy believes that aliens make him walk 2 miles every day from his house to the store. this is an example of Hallucinations.

Hallucinations are sensory impressions that come from the mind yet seem realistic. Every one of the five senses may be affected by hallucination. One could, for instance, hear a voice that nobody else in the area can hear or see of a fake image. When someone is hallucinating, they will perceive things in their brains that they believe to be real but are actually not. Only the mind can produce these ideas. These symptoms could be brought on by medical conditions like seizures or alcoholic use problems, drug side effects, or mental diseases. The perception of hearing, smell, touch, vision, or physiological sensations may all be affected by hallucinations. A person may have hallucinations with or without knowledge that they are hallucinations. It is regarded as a psychotic sign when someone believes their delusion to be genuine.

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Answer:25

Explanation:

Formula(77°F − 32) × 5/9 = 25°C

Answer: The answer is C. 298 K

Explanation:

Answer: 20 minutes

Explanation:

Given the following :

Average speed of train = 120km/hr

Distance = 40km.

The time take by the train moving at an average speed of 120km/hr to cover a distance of 40km due is ;

Recall:

Speed = distance / time

Therefore,

Time taken = distance covered / speed

Time taken = 40km / 120km/hr

Time taken = 1/ 3 hr

Therefore, 1/3 rd of an hour equals

1/3 × 60 = 20 minutes.

Time taken) 20 minutes

Time taken by tain to cover distance is 20 minutes as:

Distance= 40 km

Speed= 120 km/h

Time= distance/speed

= 40/120

= 1/3 hour

= 20 min

or  =0.33 hrs

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Answer:

50 kmph

Explanation:

300 / 6 = 50

Answer:

1.A

2.C

3.B

4. i.dk about that one

Explanation:

1. It is true that Tracking your exercise can help you stick with an exercise routine.

2. Yes, it is best to do as many different kinds of exercise as possible.

3. Building muscle strength helps with all aspects of fitness

4. Yoga would be the best exercise to achieve this goal.

Exercise is any activity that utilizes the physical movements of the body that improves a people's health, endurance, and wellbeing while lowering their chance of contracting illnesses. It enables the person to keep their body weight in a healthy weight range.

The benefits of fitness fluctuate depending on the sort of dying a person experiences. Even if a muscle is stretched, excessive sitting can cause a number of illnesses, many of which are fatal. The individual should engage in mobility activities as well as exercising to improve their stamina.

Thus, exercise is very necessary for health.

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Answer:

Resultant velocity = 3.11 m/s.

Explanation:

It is given that,

The velocity of a boat is 2.778 m/s due North

The velocuity of river is 1.389 m/s due east.

We need to find the resultant velocity. The angle between these two velocities is 90 degrees. The resultant is given by :

\(v=\sqrt{v_b^2+v_r^2} \\\\v=\sqrt{2.778 ^2+1.389 ^2} \\\\v=3.11\ m/s\)

So, the correct option is (a).

Answer:

The distance travelled in the next 5 seconds is 20 m.

Explanation:

The distance travelled is given by the formula,

\(s=ut+\frac{1}{2} at^{2}\)

Where,

u is the initial velocity in m/s

t is the time in s

a is the acceleration in \(m/s^{2}\)

As per the given data,

u= 9 m/s

t= 5 s

a= -2 \(m/s^{2}\) (The negative sign indicates the deceleration)

Substituting the values,

\(s=(9) * (5) +\frac{1}{2} (-2) (5)^{2}\)

=45-25

=20

So, a runner travels 20 m in the next 5 seconds.

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The California sea lions communicate  is  option C: 0.375 to 3 meters.

To calculate the approximate wavelengths of sound with which the California sea lions communicate, we can use the formula:

Wavelength = Speed of Sound / Frequency

Given:

Speed of Sound in Sea Water = 1,500 m/s

Frequency Range = 500 Hz to 4,000 Hz

For the lower frequency of 500 Hz:

Wavelength = 1,500 m/s / 500 Hz = 3 meters

For the higher frequency of 4,000 Hz:

Wavelength = 1,500 m/s / 4,000 Hz = 0.375 meters

Therefore, the approximate wavelengths of sound with which the California sea lions communicate are approximately 0.375 to 3 meters.

So, the correct answer is option C: 0.375 to 3 meters.

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The wavelength of the wave will be 4 meters. when 5 complete waves occupy a length of 20m.

Wavelength is defined as the space between waves' crests, particularly between electromagnetic or sound wave points. A recurring event's frequency is measured by how many times it occurs in a unit of time. To underline the difference from spatial frequency, it is also occasionally referred to as temporal frequency.

There is an inverse relationship between the frequency and the wavelength of the waves as the wavelength increases the frequency decreases and if the wavelength decreases the frequency increases.

Given that a wave has 5 complete waves occupying a length of 20m. The wavelength of the wave will be calculated as below:-

λ = Distance / frequency

λ = 20 / 5

λ = 4 meters

Therefore, the wavelength of the wave will be 4 meters. when 5 complete waves occupy a length of 20m.

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The opposite direction is exerted on the object, so that the forces camel The object is is brought to rest rapidly.

Direction is a term used to describe the way something is moving or pointing. It is often used in reference to the orientation of objects, or the path something is taking. Direction can be described in terms of three-dimensional coordinates, including length, width, and height. Direction can also be described in terms of four cardinal directions (north, south, east and west), and eight ordinal directions (north-east, south-east, south-west and north-west). Direction can also be expressed in terms of angles and compass bearings. Direction is an important part of navigation, and is used to calculate distances. It is also essential for planning journeys and understanding the environment.

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The rate constant (k) for the reaction at 69.0 °C is approximately 4.38 × 10^8 s^(-1).

To calculate the rate constant (k) for a reaction, you can use the Arrhenius equation:

k = Ae^(-Ea/RT)

Where:

k = rate constant

A = frequency factor

Ea = activation energy

R = gas constant (8.314 J/mol·K)

T = temperature in Kelvin

First, convert the given temperature from degrees Celsius to Kelvin:

T = 69.0 + 273.15 = 342.15 K

Substitute the given values into the Arrhenius equation:

k = (4.56 × 10^11 s^(-1)) * exp(-81.7 kJ/mol / (8.314 J/mol·K * 342.15 K))

Calculating this expression gives:

k ≈ 4.38 × 10^8 s^(-1)

Therefore, the rate constant (k) for the reaction at 69.0 °C is approximately 4.38 × 10^8 s^(-1).

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Answer:

v=4m/s

wavelength=6m

f=v/∧

f=0.67Hz

now, v= 1.7 m/s

f=0.67Hz

∧=v/f

∧=1.7/0.67

∧=2.54m

Explanation:

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2.54m is the wavelength in the shallower region.

Wavelength exists the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in the area or along a wire. In wireless systems, this length exists usually specified in meters (m), centimeters (cm), or millimeters (mm).

Wavelength can be represented as the distance between two successive crests or troughs of a wave. It exists calculated in the direction of the wave.

v=4m/s

wavelength=6m

f=v/λ

f=0.67Hz

now, v= 1.7 m/s

f=0.67Hz

λ=v/f

λ=1.7/0.67

λ=2.54m.

Hence, 2.54m is the wavelength in the shallower region.

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We can use the thin lens equation to find the focal length of the contact lens:

1/f = 1/do + 1/di

where f is the focal length of the contact lens, do is the object distance (the distance from the object to the lens), and di is the image distance (the distance from the lens to the image).

In this problem, the near point of the person is the object, and the image is formed at a distance of 25.0 cm from the eyes (assuming the eyes are not accommodating). Therefore, we have:

do = 125 cm - 25.0 cm = 100 cm

di = -25.0 cm (since the image is virtual)

Plugging these values into the thin lens equation, we get:

1/f = 1/100 cm - 1/-25.0 cm

1/f = 0.01 cm^-1 + 0.04 cm^-1

1/f = 0.05 cm^-1

f = 1/(0.05 cm^-1) = 20 cm

Therefore, the focal length of the contact lens should be 20 cm to allow the person to read a physics book held 25.0 cm from his eyes.

Answer:

She will travel 180 kilometers.

Explanation:

You take the time and multiply it by your distance, and you get your total distance.

d = v.t

d = 60 km/h x 3 h

d = 180 km

Answer:

 In science and engineering, the weight of an object is the force acting on the object due to gravity. ... Some standard textbooks define weight as a vector quantity, the gravitational force acting on the object. Others define weight as a scalar quantity, the magnitude of the gravitational force.

Explanation:

The estimated number of nuclei in a 50-kg human body would be extremely large, on the order of 10^29 to 10^30 nuclei.

The human body consists of trillions of cells, and each cell contains a nucleus. Estimating the number of nuclei in a 50-kg human body involves several assumptions. On average, it is estimated that there are about 37.2 trillion cells in an adult human body. Since each cell has a nucleus, we can assume that there are roughly 37.2 trillion nuclei in the body. However, this estimate can vary depending on factors such as individual body composition and cell distribution throughout different tissues and organs. Additionally, different cell types have different nuclear counts. Therefore, while 37.2 trillion nuclei provide a rough estimate, the actual number of nuclei in a human body may differ.

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The theoretical values of nodal voltages using Kirchhoff's Laws can be used in the analysis of an electrocardiogram (ECG) to identify potential cardiac abnormalities and diagnose specific heart conditions by providing important information about the electrical activity of the heart.

The ECG measures the electrical activity of the heart by detecting the changes in voltage that occur during each heartbeat. The electrical activity of the heart can be modeled using Kirchhoff's Laws, which describe how current and voltage behave in an electrical circuit. Abnormalities in the electrical activity of the heart can be detected by analyzing the ECG waveform and comparing it to the theoretical values of nodal voltages.

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--The complete Question is, How can the theoretical values of nodal voltages using Kirchhoff's Laws be used in the analysis of an electrocardiogram (ECG) to identify potential cardiac abnormalities and diagnose specific heart conditions? --

A perfect machine is not possible because perfect machines mean that the system will always perform at a 100% efficiency, and that's not possible in real life because the systems of the real world will always lose some energy in the form of heat, resulting in a lower efficiency percentage.

Answer:

3 electron hai bro of puch mujhe sab aata h