elect all of the following that correctly describe what a voltmeter and ammeter measure. Select all that apply: A voltmeter measures the potential difference (or voltage) across a circuit element. A voltmeter measures the potential difference (or voltage) passing through a circuit element. An ammeter measures the electric current passing through a circuit element. An ammeter measures the electric current across a circuit element.

Time period of a pendulum is given by --

According to problem

When it is at rest, it oscillates with a period of 1 second. When it is accelerating in an elevator it oscillates with a period of 2 seconds.

From above equation we can conclude that time period of pendulum depends on acceleration and it is inversely proportional .

So its is a Pendulum.

final answer is :- pendulum

Answer:

wrong

Explanation:

it depends your perspective on it

Answer /The wave with frequency 100 will have its crests farther apart as its wavelength Will be more or elevated.

Explanation:

For sound waves, the velocity ‘v’ is equal to the product of wavelength (λ) and frequency (f) i.e. (v = n × λ or v/n = λ). Therefore, frequency is indirectly proportional to the wavelength.

The sound wave with frequency 100 will have its crests farther apart from each other as frequency is indirectly proportional to the wavelength. The speed of a wave is uninfluenced by variation in the frequency. Therefore, the less frequency wave will have more wavelength.

Mass A = 2000 kg

velocity A = 12 m/s (North)

Mass B= 4000 kg

Velocity B= -8 m/s (South)

We adopt that North is positive and South is negative.

Conservation of momentum (p)

• Pi = Pf

• ma * va + mb*vb = (ma+mb) Vf

Where Vf is the final velocity after the collision.

Replacing:

(2000* 12 ) + (4000*-8)= (2000+4000) vf

24,000- 32,000 = 6,000 vf

-8,000 = 6,000 vf

-8,000 / 6,000 = vf

vf = -1.3334 m/s

vf = 1.3334 m/s , South

Answer:

Narendra Modi

Explanation:

The answer depends on what year you are talking about on, Narendra Modi was a prime minister of india since 2014. If you are missing information on your question tell me so I can try and tell you the answer,

Hope this helped,

have a good day :]

Considering the definition of velocity, the average velocity along the trail is 0.608 km/s east.

Velocity is a physical magnitude that relates the displacement of an object, the time it takes to make this change in position and direction. So, it is considered a vector magnitude.

The velocity can be defined as the amount of space traveled per unit of time with which a body moves, considering the direction, and can be calculated using the expression:

velocity= distance traveled÷ time

In this case, you know:

Replacing in the definition of velocity you can obtain the time necessary to travel each trail:

1.7 m/s= 0.7 km÷ time of first half of a straight trail

1.7 m/s× time of first half of a straight trail= 0.7 km

time of first half of a straight trail= 0.7 km÷ 1.7 m/s

time of first half of a straight trail= 0.412 s

0.37 m/s= 0.7 km÷ time of second half of a straight trail

0.37 m/s× time of second half of a straight trail= 0.7 km

time of second half of a straight trail= 0.7 km÷ 0.37 m/s

time of second half of a straight trail= 1.892 s

Then, you know:

Replacing in the definition of velocity:

velocity= 1.4 km÷2.304 s

velocity= 0.608 km/s

Finally, the average velocity along the trail is 0.608 km/s east.

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Answer:

Explanation:

mass of the girl m₁ = 47.3 kg

mass of the plank m₂ = 162 kg

velocity of the girl with respect to surface = v₁

velocity of plank with respect to surface = v₂

v₁+ v₂ = 1.36

v₂ = 1.36 - v₁

applying conservation of momentum law to girl and plank.

m₁v₁ = m₂v₂

47.3 x v₁ = 162 x ( 1.36 - v₁ )

47.3 v₁ = 220.32 - 162v₁

209.3 v₁ = 220.32

v₁ = 1.05 m /s

Answer:

The correct answer is 4R1

Explanation:

According to the given scenario ,the radius of the tightest curve on the same road without skidding is as follows:

As we know that

Centeripetal Acceleration is

= v^2 ÷ r

In the case when velocity becomes 2 times so the r would be 4 times

So, the radius of the  tightest curve on the same road without skidding is 4R1

Answer:

C. the core

Explanation:

since it has the most energy and the hottest layer

Answer:

Explanation:

Torque can be defined as the rate of change of angular momentum

Step one:

We need to solve for the total angular momentum acting on them

the expression for the angular momentum is given as      

L=mrv-----1    

where

L=angular momentum

m=mass

v=velocity

r=radius

Step two:

For the first object

m=6kg

r=1m

v=2m/s

L1=6*1*2= 12kg*m^2/s

For the second object

m=3kg

r=2m

v=3m/s

L2=3*2*3= 18kg*m^2/s  

Step three:

Total angular momentum= L1+L2= 12+18= 30kg*m^2/s        

τ=44Nm

time= 5 secs

ΔL=τ*time  

ΔL=44*5=220N-ms

hence the angular impulse=220Nms

Change in their angular momentum= Angular impulse-angular momentum

Change in their angular momentum= 220-30

Change in their angular momentum=190kg*m^2/s  

Answer:

Explanation:

2^5=32-20=-12 meters per sec (going backwards).

If this is correct pls mark me. brainly to let me know, tyy C:

Take into account that each pair of values on the table can be represented by a point in the coordinate system. In this case, the independent variable is time, then, the x-axis represents the values of time. Moreover, position is dependent variable, then y-axis represents the values of position.

By placing the corresponding points on the coordinate system and join them with a curve, you obtain the following graph:

Answer:

OXYGEN

Explanation:brainlyist me

Answer:

Nitrogen

Explanation:

Oxygen is second

1) The dolphin must generate approximately 7,106 Joules of energy to jump 3.4 m above the water's surface.

2) The dolphin must generate approximately 3,523 Joules of energy to rotate its body in this way.

To calculate the energy required for the dolphin to jump 3.4 m above the water's surface, we can use the concept of gravitational potential energy. The energy required is equal to the change in gravitational potential energy of the dolphin during the jump.

The gravitational potential energy is given by the equation:

PE = m * g * h,

where PE is the potential energy, m is the mass of the dolphin, g is the acceleration due to gravity, and h is the height of the jump.

Substituting the given values, we have:

PE = (230 kg) * (9.8 m/s^2) * (3.4 m) = 7,106 Joules.

Therefore, the dolphin must generate approximately 7,106 Joules of energy to jump 3.4 m above the water's surface.

To calculate the energy required for the rotation, we can use the concept of rotational kinetic energy. The energy required is equal to the change in rotational kinetic energy of the dolphin during the rotation.

The rotational kinetic energy is given by the equation:

KE = (1/2) * I * ω^2,

where KE is the kinetic energy, I is the moment of inertia of the dolphin, and ω is the angular velocity.

Substituting the given values, we have:

KE = (1/2) * (240 kg⋅m^2) * (5.9 rad/s)^2 = 3,523 Joules.

Therefore, the dolphin must generate approximately 3,523 Joules of energy to rotate its body in this way.

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180° or π Radians is the smallest phase difference possible When two coherent waves combine destructively to create a minimum

Two waves of the same wavelength that are entirely out of phase with one another might cancel one another out or interact negatively. When there is a 180 degree or larger radian phase difference, this happens. Only when the two waves have the same amplitude do they completely cancel out. Partially destructive superposition occurs when two waves that are entirely out of phase yet have different amplitudes. The intensity is 0.

Superposition is the phenomenon in which the combined displacement of two combining waves is equal to their vector sum.

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The purpose of the chiller is to remove heat from the air and is therefore denoted as option A.

This is a type of device which is referred to as type of a cooling system that removes heat by circulating heat-absorbing a refrigerant through a series of mechanisms through which the heat is released.

The result of this process is that the heat in the air is removed as a result of the refrigerant being adequately circulated and then the environment becomes cooler and is therefore the reason why it was chosen as the correct choice.

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The net work done on the baseball to bring it to rest is -130.953 J or approximately 131 J. The negative sign indicates that the force has been applied opposite to the direction of motion of the baseball.

The work-kinetic energy theorem states that an object's change in kinetic energy is equivalent to the work that has been done on it.

\(W_{net} = KE_{f} -KE_{i}\)

Here,

\(W_{net}\) = Net work done

\(KE_{f}\) = Final Kinetic Energy

\(KE_{i}\) = Initial Kinetic Energy

We know,

\(KE = \frac{1}{2} mv^{2}\)

Here, m = Mass of the object

v = velocity of the object

Now,

\(W_{net} = KE_{f} -KE_{i}\\W_{net}= \frac{1}{2} mv^{2}_{f} - \frac{1}{2} mv^{2}_{i}\)

Given,

Mass of baseball (m) = 145g = 0.145 kg

Initial velocity (\(v_{i}\)) = 42.5 m/s

Final velocity (\(v_{f}\)) = 0 m/s  (since, the baseball comes to rest.)

Inserting these values in the above equation we get,

\(W_{net}= \frac{1}{2} mv^{2}_{f} - \frac{1}{2} mv^{2}_{i}\\ = 0- \frac{1}{2} *0.145*42.5*42.5 \\= -130.953\)

Hence, the net work done on the baseball to bring it to rest is -130.953 J or approximately 131 J.

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Answer:

The characteristics that determine how easily two substances change temperature are:

The volume and density of the substances and the amount of time they are in contact do not directly affect how easily they change temperature.

Explanation:

The ice block has a GPE of 0 Joules at point A

Gravitational Potential Energy (GPE).

The amount of GPE an object on Earth depends on its mass and height above the ground.

GPE = mass x gravity x height

At point A, the height of the ice block = 0 (since it is at rest)

That is height = 0

Therefore:

GPE = mass x gravity x 0

GPE = 0 Joules

Answer:

Diffraction Grating: Definition and Applications

A diffraction grating is a device that is used to separate light into its component wavelengths. It consists of a flat surface that has a large number of parallel grooves or lines etched into it. When light is shone onto the grating, it is diffracted into its individual wavelengths, producing a spectrum of colors. Diffraction gratings are commonly used in various applications, such as spectroscopy, astronomy, and telecommunications.

The science behind diffraction gratings is based on the principles of wave interference and diffraction. When light passes through a narrow slit or a small opening, it diffracts, or spreads out, into a series of bright and dark fringes. When a beam of light passes through a grating, the light is diffracted by each of the parallel lines on the surface of the grating, resulting in a series of bright and dark fringes that are spaced apart at regular intervals. The spacing between the lines on the grating determines the amount of diffraction, and therefore the angle at which the diffracted light is scattered.

Diffraction gratings are commonly used in spectroscopy, which is the study of the interaction between light and matter. Spectroscopy is used in various applications, such as identifying the chemical composition of materials, analyzing the spectra of stars and galaxies, and studying the properties of molecules and atoms.

In astronomy, diffraction gratings are used in telescopes and spectrometers to study the spectra of stars and galaxies. By analyzing the spectra, astronomers can determine the chemical composition, temperature, and other properties of celestial objects.

In telecommunications, diffraction gratings are used in fiber-optic communication systems to separate different wavelengths of light. This allows for the transmission of multiple signals over a single optical fiber, increasing the capacity and speed of the communication system.

In conclusion, a diffraction grating is a device that is used to separate light into its component wavelengths. It consists of a flat surface with parallel lines etched into it, which diffract the light and produce a spectrum of colors. Diffraction gratings are commonly used in spectroscopy, astronomy, and telecommunications, and they play an important role in our understanding of the interaction between light and matter.

Explanation:

Answer:

diffraction grating is an optical component with a periodic structure that diffracts light into several beams travelling in different directions.

Explanation:

Answer: C) 7

Explanation:

I just took the test :)

The strongest electric field expreenced by the charge W. Then the correct option is A.

The amount of labour required to move a unit of electromotive force from a visual reference to a specific place in an electric field is known as the electrostatic field.

The formula is given as,

V = kq / r

Where 'r' is the distance between the charge and 'q' is the charge.

Electric potential depends on the distance between them which are as follows:

The strongest electric field expreenced by the charge W. Then the correct option is A.

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The complete question is given below.

Answer:

m²=m¹

Explanation:

m¹v¹ + m²v² = m¹ v¹+m¹v²

m²v²= m¹v²

m²v²/v² = m¹

m² = m¹

Answer:

where u put it last time or retrace ur steps to where u last put it

Answer:

The interaction with the highest electrostatic potential energy is:

A +1 and -2 particle separated by a distance of 5 nm.

Explanation:

The electrostatic potential energy between two charged particles depends on the magnitude of their charges and the distance between them. The formula for calculating electrostatic potential energy is:

U = k * (q1 * q2) / d

where U is the electrostatic potential energy, k is Coulomb's constant, q1 and q2 are the magnitudes of the charges, and d is the distance between them.

In the given options, the interaction between +1 and -2 particles separated by a distance of 5 nm has the highest electrostatic potential energy because the charges have a higher magnitude (compared to other options) and they are close to each other, resulting in a stronger electrostatic force of attraction. The other options either have smaller charges, larger distances, or both, leading to lower electrostatic potential energy.

Answer:

the energy of the spring at the start is 400 J.

Explanation:

Given;

mass of the box, m = 8.0 kg

final speed of the box, v = 10 m/s

Apply the principle of conservation of energy to determine the energy of the spring at the start;

Final Kinetic energy of the box = initial elastic potential energy of the spring

K.E = Ux

¹/₂mv² = Ux

¹/₂ x 8 x 10² = Ux

400 J = Ux

Therefore, the energy of the spring at the start is 400 J.

Answer:

there move slower

Explanation:

because when heated the molecules of the matter[liquid]move faster but when cooled,they move slow or they do not.