Question 12 12 a An experiment is carried out with a monatomic gas to determine the specific heat of the gas. The result is cy =9.50×10-² J/gK . Part A How many degrees of freedom does an atom in th

80Sec or 1.33 min time taken by train to cross a bridge with a uniform speed of 36 kmph.

Given data,

length of bridge = 600m

length of train = 200m

Length of bridge + Length of train is the total distance travelled by train to cross the bridge.

So, 600+200 = 800m = 0.8km

Now, applying the formula for time,

\(time =\frac{distance}{speed}\)

\(time = \frac{0.8}{36}\)

time = 0.022hours

time in seconds= 0.022×60×60

time in seconds= 1.33×60

time in seconds= 80seconds

Therefore, 80Sec or 1.33 min time taken by train to cross a bridge with a uniform speed of 36 kmph.

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Answer:

the volume increase

Explanation:

because because when the speed of the vibrations decrease the speech of the sounds become loud

The ozone layer is a region of the Earth's stratosphere that contains a high concentration of ozone (O3) molecules.

It plays a crucial role in protecting life on Earth by absorbing the majority of the Sun's harmful ultraviolet (UV) radiation. The depletion of the ozone layer, primarily caused by human activities, leads to an increase in UV radiation reaching the Earth's surface. This has significant adverse effects on human health, ecosystems, and the environment.

The ozone layer is located in the Earth's stratosphere, approximately 10 to 50 kilometers above the surface. It is formed by the interaction of UV radiation from the Sun with oxygen molecules (O2). The UV radiation breaks apart the oxygen molecules, and the resulting oxygen atoms (O) combine with other oxygen molecules to form ozone (O3).

The ozone layer is essential because it acts as a shield, absorbing the majority of the Sun's UV-B and UV-C radiation, preventing it from reaching the Earth's surface. UV radiation is harmful to living organisms, as it can cause DNA damage, skin cancer, cataracts, and weakened immune systems. The ozone layer's ability to filter out these harmful rays helps protect human health and supports the functioning of ecosystems.

However, human activities have significantly contributed to the depletion of the ozone layer, primarily through the release of certain chemicals known as ozone-depleting substances (ODS), such as chlorofluorocarbons (CFCs) and halons. These substances were commonly used in aerosols, refrigeration, air conditioning, and fire suppression systems. Once released into the atmosphere, ODS molecules can reach the stratosphere and undergo reactions that break down ozone molecules.

The depletion of the ozone layer has several detrimental effects. Increased UV radiation reaching the Earth's surface can lead to an increase in skin cancer cases, cataracts, and other health issues in humans. UV radiation also harms phytoplankton, which are vital for marine ecosystems and the global carbon cycle. Additionally, UV radiation can negatively impact terrestrial and aquatic ecosystems, causing DNA damage, reduced plant growth, disruption of food chains, and harm to coral reefs and other sensitive marine organisms.

Recognizing the importance of protecting the ozone layer, the international community developed the Montreal Protocol in 1987, which aims to phase out the production and use of ODS. Through global efforts to reduce ODS emissions, there has been a gradual recovery of the ozone layer in recent years.

In short , the ozone layer acts as a natural shield, protecting life on Earth from harmful UV radiation. The depletion of the ozone layer due to human activities has severe consequences for human health, ecosystems, and the environment. It is crucial to continue efforts to reduce ozone-depleting substances and preserve the integrity of the ozone layer for the well-being of present and future generations.

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The velocity-time graph indicates that the car was at rest initially and has a sudden acceleration, thus increased its velocity upto 23 m/s.

A plot between velocity of motion of an object and time is called a velocity-time graph. It demonstrates how an object moves as it moves straight forward.

The instantaneous speed is the same as the magnitude of the velocity at that point. Only 1-Dimensional motion is depicted, and it might have positive or negative values.

The slope is zero when the acceleration is zero, which is represented as a horizontal line. A positive slope (an upward sloping line) indicates that the acceleration is positive.

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Answer:

Two positively charged particles

Explanation:

I said two positively charged particles because if I say c or d what ever it is for you guy it can be wrong so just pick the one that says Two positively charged particles

Answer: C  Two positively charged particles.

Explanation:

just trust me on it, i've done the same quiz.

The ocular microscope magnification is 20x.

We need to know about microscope magnification to solve this problem. Microscope is a device utilized for seeing a small object. The microscope has two lenses which are objective and ocular. The total magnification of the microscope lens is

M = Moc x Mobj

where M is total magnification, Moc is ocular magnification and Mobj is objective magnification.

From the question above, we know that

M = 800x

Mobj = 40x

By substituting the following parameter, we get

M = Moc x Mobj

800 = Moc x 40

Moc = 800 / 40

Moc = 20x

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The path along which an object moves, which might be a straight line or might be curved, is referred to as the object’s trajectory.

This is defined as the path that an object follows when in motion and it varies according to various factors such as the forces acting on the object and so on.

A trajectory in this case could either be straight line or curved and is also referred to as the path an object travels in space.

This is therefore the reason why it was chosen in this scenario as the most appropriate choice.

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After considering the given data we conclude that the wavelength of visible light emitted by a hydrogen atom when its excited electron drops from n = 6 to n = 2 is approximately 102.55 nm.

To evaluate the wavelength (in nm) of visible light emitted by a hydrogen atom when its excited electron drops from n = 6 to n = 2, we can apply the Rydberg formula:
\(1/\lambda = R(1/n_1^{2} - 1/n_2^{2} )\)
Here:
λ = wavelength of the emitted light
R = Rydberg constant \((1.097 *10^7 m^{-1} )\)
\(n_1\) and \(n_2\) = initial and final energy levels of the electron
Applying substitution of the given values, we get:
\(1/lambda = (1.097 * 10^7 m^{-1} )(1/6^{2} - 1/2^{2} )\)
Evaluating for λ, we get:
λ = 102.55 nm
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Answer:

The volume of an object is a measure of the amount of space occupied by that object

Explanation:

Answer: A student might use a graduated cylinder to measure volume of a chemical solution in milliliters

Explanation:

Volume is the quantity of three-dimensional space enclosed by a closed surface,an often quantified numerically using the SI derived unit, the cubic metre.

Answer:

Accelerometers?

Explanation:

The impact of our actions on our attitudes is best illustrated by the foot-in-the-door phenomenon. Therefore, option C is correct.

The foot-in-the-door phenomenon refers to the tendency for people to be more likely to comply with a large request after they have first agreed to a smaller, initial request.

Once individuals take a small action or make a small commitment, they tend to align their attitudes with their actions to maintain consistency. This phenomenon demonstrates how our behavior can influence and shape our attitudes over time.

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Answer:

Water is a compound because it is made up of water molecules. There is no such thing as water atoms. Water molecules are made of hydrogen and oxygen atoms, in the definite proportion of two hydrogens for one oxygen.

As a result, the racer's final velocity is 13.00 m/s after accelerating at 0.500 m/s2 for 7.00 s.

Velocity is a vector representation of an object's or particle's displacement with respect to time. The meter per second (m/s) is the standard unit of velocity magnitude (also known as speed). Alternatively, velocity magnitude can be expressed in centimeters per second (cm/s). The direction of movement of the body or item is defined by velocity. Speed is fundamentally a scalar number. Velocity is, in essence, a vector quantity. It is the pace at which distance changes. It is the displacement rate of change.

Here,

The final velocity can be found using the equation of motion,

vf = vi + at,

where vf is the final velocity, vi is the initial velocity (11.5 m/s), a is the acceleration (0.500 m/s^2), and t is the time for which the acceleration was applied (7.00 s).

Substituting the values we get,

vf = 11.5 + 0.500 * 7.00 = 13.00 m/s.

So, the racer's final velocity is 13.00 m/s as he accelerates at the rate of 0.500 m/s2 for 7.00 s.

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At a hydroelectric power plant, for maximum power generation, the turbine blades should be designed so that the water rebounds.

p = m v

p = Momentum

m = Mass

v = Velocity

Change in momentum = Initial momentum - Final momentum

If water rebounds, final velocity will be negative. So the change in momentum will be the sum of initial momentum and final momentum.

If water comes to a stop, final momentum will be zero. So the change in momentum will be equal to initial momentum. This change in momentum value is less than that of change in momentum value if water rebounds. Higher the change in momentum for water, higher will be the change in momentum of the blades.

Therefore, at a hydroelectric power plant, for maximum power generation, the turbine blades should be designed so that the water rebounds.

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The acceleration of the textbook is a = F/m = 2.0 N/1.33 kg = 1.5 m/s². and the final velocity of the textbook is v = 0 + (1.5 m/s²)(0.75 s) = 1.125 m/s.

Acceleration is the rate at which an object changes its velocity over time. It is a vector quantity, meaning it has both magnitude and direction. An object's acceleration can be calculated by measuring the change in its velocity over time.

The net force acting on the textbook is the difference between the pushing force of 4.0 N and the frictional force of 2.0 N, which is 2.0 N.
According to Newton's Second Law, this net force of 2.0 N will cause an acceleration of the textbook given by the equation F = ma, where m is the mass of the textbook (1.33 kg) and a is the acceleration.
Therefore, the acceleration of the textbook is a = F/m = 2.0 N/1.33 kg = 1.5 m/s².

The final velocity of the textbook can then be calculated using the equation v = v0 + at, where v0 is the initial velocity (0 m/s, since the textbook was initially at rest), a is the acceleration (1.5 m/s²), and t is the time the textbook was pushed (0.75 m).
Therefore, the final velocity of the textbook is v = 0 + (1.5 m/s²)(0.75 s) = 1.125 m/s.

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Explanation:

Which of the following solutions have a concentration of 0.11 g/mL?

Answer:

22 g of acetic acid in 200 mL of water

Explanation:

22g/200mL = 0.11 g/mL

The speed changes as a result of the energy being transferred into a container filled with magnetic marbles and the kinetic energy produced by the container's gentle shaking. Phase shifts will result from this.

The energy of a system changes together with each phase change it undergoes. These involve kinetic energy transmission to a system. Endothermic reactions occur when a condition changes from being more ordered to being less ordered. Exothermic reactions are always involved in transitions from one state to another that is more organised.

When a substance transforms from one state to another, a phase change occurs in the system. When the system receives enough energy or loses enough energy, these changes take place. Phase changes also happen when the system's pressure is altered.

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Complete Question:

Describe how does transferring energy into a container of magnetic marbles affect the speed by shaking the container gently?

Answer ideal mechanical advantage

Answer:

Answer is A

Speed = Wavelength × Frequency

Explanation:

Googled it

We are asked to determine a set of parametric equations for the parabolic motion of an object. The parametric equations for such a motion is given by:

To determine the velocity we will solve for "t" in equation (1):

Now, we will replace this in equation (2):

Simplifying:

Now we replace the values x = 54.5 and y = 0:

Simplifying:

Now we solve for "v":

Solving the operation:

taking the square root:

Therefore, the velocity is 39.54 ft/s.

\(\\ \sf\bull\longmapsto Wd=Force(Displacement)\)

\(\\ \sf\bull\longmapsto Work=10(0.3)\)

\(\\ \sf\bull\longmapsto Work=3J\)

Answer:

\({ \tt{work \: done = force \times distance}}\)

• force → 10 N

• distance → 30 cm = 0.3 m

\({ \tt{ work \: done = (10 \times 0.3)}} \\ \\ { \boxed{ \tt{work \: done = 3 \: joules}}}\)

The amount of sample of liquid in grams when its temperature is raised is calculated to be 20 g.

The term specific heat capacity refers to the amount of heat needed to raise a substance's temperature by one degree Celsius.

Q = m c Δt  

Q = 5.23 kcal of heat are absorbed by fluids = 5230 cal

C = heat capacity of liquid = 2.09 cal/g °C

Initial temperature of the liquid T i = 101 K

Final temperature of the liquid T f = 225 K

Change in temperature, Δt = T f - T i = 225 - 101 K = 124 K

Putting in the values, we get:

5230 = m × 2.09 cal/g °C × 124 K  

m = 20 g

The given question is incomplete. The complete question is 'The specific heat of a liquid x is 2.09 cal/g°c. A sample amount of grams of this liquid at 101 k is heated to 225 k. the liquid absorbs 5.23 k cals. what is the sample of liquid in grams? (round off decimal in the answer to nearest tenths)'

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Motion study objective was to improve the efficiency and productivity of work processes by developing standardized work processes.

Frank and Lillian Gilbreth were pioneers in the field of motion study and were among the first to apply scientific principles to the study of work processes. One of the objectives of the motion study conducted by Frank and Lillian Gilbreth was to improve the efficiency and productivity of work processes.

The Gilbreths believed that by carefully analyzing work processes and identifying unnecessary motions, they could find ways to eliminate waste, reduce fatigue, and increase productivity. To achieve this objective, they used a combination of observation, time-lapse photography, and statistical analysis to identify and eliminate inefficient motions in work processes.

By breaking down work processes into their component motions and analyzing each motion, the Gilbreths were able to identify ways to reduce the time and effort required to complete a task. They also developed a system of standardized work processes that could be used to train workers and improve the consistency of work output.

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Answer:

The average densities of both matches the expected density for objects made from water ice.

Explanation:

Charon's density is 1.2 to 1.3 g / cm3, while Pluto's density is 1.8 to 2.1 g / cm3. This was discovered in many researches and measurements of these two celestial bodies, with the objective of understanding them and promoting efficient scientific knowledge.

With the measurements of the average densities between pluto and Charon it was possible to conclude several statements about them. Firstly, it is possible to see that the two formed independently and at different times, in addition to indicating the existence of few rocks in charon, which is consistent with the average density of objects made mostly of water ice.

The correct option is option A) It stays constant.The horizontal component of the velocity will remain constant with time after the projectile is fired.

Projectile motion is the movement of an object that has been thrown, launched, or shot into the air. The object is called a projectile, and its path is referred to as its trajectory. Projectile motion can be predicted and analyzed by physics, but it is not as straightforward as it may seem. The following are some of the properties of projectile motion: Acceleration due to gravity (9.8 m/s²) Act of the horizontal and vertical components of velocity (v) Path of the projectile in a parabolic shape. The horizontal component of the velocity will remain constant with time after the projectile is fired.

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The impedance of a series lrc circuit with a resistance of 18 ohms,The impedance is 27.88Ω.

Calculation:-

The impedance is given by,

\(Z = \sqrt{R^{2}+(wL -\frac{1}{wC})^{2} }\)

The angular frequency can be written as,

W= 27\(\pi\)  w = 2\(\pi\) (120) = 753.98rad/s

We can calculate the impedance as,

=  Z = √(18)² + ((753.98)(0.03) - 1/(753.98)(1 x 10⁻³)² = 27.88Ω.

Impedance is the overall resistance of a circuit to current or a measure of how well it impedes the flow of charge. This is similar to resistance but also takes into account capacitance and inductance. An ohm is a unit of measurement for impedance. Impedance and resistance are similar concepts.

Both describe how a component resists or resists the flow of current. Resistance is the measurement of voltage divided by the resistance of the resistor. Impedance is a generalized concept of voltage divided by current in each component.

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If a neutral material like fur is rubbed on another neutral object like a rubber ball then the balloon becomes negatively charged and the fur becomes positively charged. The correct option is A.

When two or more bodies come into touch and then break apart, static electricity results. The transport of electrons from one atom to another is caused by this interaction between surfaces.

When the positive and negative charges are out of balance, static electricity is produced.

While electrons like to hop all over the place, protons and neutrons don't move around very much. A negative charge is present when an object (or person) possesses more electrons.

The animal fur lacks electrons while the rubber balloon has an abundance of them.

The rubber balloon has an overabundance of negative charge due to its extra electrons. The absence of electrons on animal fur also gives it a positive charge.

Thus, the correct option is A.

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Answer:

A

Explanation:

I got this answer because (by my estimation again) you are looking at 0.04 m/s which is the sound of a measure of a 2 Hz sound frequency. Therefore, for each section on the table diagrams I multiplied the period by their wavelength measurement until I got the value 0.04 m/s. In which A was the only option that gave me that value, providing me with a 2 Hz sound frequency.

Answer:

A

Explanation:

Idont know really i asked my grandpa bc he was a teacher and he said it was A if its wrong then im sry