Conservation of Momentum

The full form of rms velocity is Root mean square velocity. The temperature at which hydrogen molecules have the same rms speed as nitrogen molecules at 155 ∘C is 30.57 K.

The root mean square velocity is defined as the square root of the mean of squares of the velocity of individual gas molecules. The equation used to calculate the rms velocity is:

Vrms = √3RT / M

155°C = 155 + 273 = 428 K

'M' is molar mass

Vrms N₂ = √3R × 428 / 28      (1)

Vrms H₂ = √3RT / 2                (2)

From the equation (1) and (2),

√3RT / 2  = √3R × 428 / 28

3RT / 2 = 3R × 428 / 28

T = 30. 57 K

Thus at 30. 57 K hydrogen molecules have the same rms speed as nitrogen molecules.

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Newton's second law allows us to find the results for the value of the acceleration and the velocity of the bodies are:

Newton's second law says that force is directly proportional to the product of mass and acceleration

        F = m a

Where F is force, m is mass and acceleration.

As the body is close to the planet the force is the universal gravitational force

         \(F = -G \frac{Mm}{r^2}\)

Where F is the force, G the universal gravitational constant, M the mass of  the planet and m the mass of another body and r the distance between them

Let's substitute

          \(-G \frac{Mm}{r^2 } = m a\)

          \(a = - G M/r^2 = - g\)

We can see that the acceleration of small bodies (x or y) does not depend on their mass, the negative sign indicates that the force is directed to the center of the planet.

In a acceleration graph versus the time is the acceleration in constant for the two bodies and for their center of mass.

If we make a graph of velocity versus  time, it is given by

         v = v₀ - g t

This graph is a line of constant positive slope; the velocity values ​​for the two bodies are equal since the acceleration of gravity does not depend on the mass of the body.

In the attachment we can see a scheme of the graph of acceleration and velocity versus time

In conclusion using Newton's second law we can find the results for the value of the acceleration and the velocity of the bodies are:

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Answer: Pharos just bossed people around. They killed anyone who refused to work. In the end the many people died and the pyramids were created.

Explanation:

Answer:

Explanation:

There are many laws in physics, that started out as theories and became scientific truths only after an experiment was performed that confirmed that the theory was true.

One of the most famous theories was the guess that the gravitational Force was a constant amount that depended on mass and distance. It was incredibly difficult to prove because the with large masses and small distances, the force is quite small.

Newton proposed the existence of the gravitational force in 1687 and Cavendish found its precise truth in 1798 -- 111 years after Newton said it was so.

Newton proposed a theory. Cavendish proved it to be a law later. Even then, Einstein proposed the modern law.

Answer:

Explanation:

a) Velocity increased at the rate of 0.40 m/s^2 for 40 s, so increased by ...

  (0.40 m/s^2)(40 s) = 16 m/s

The final velocity is ...

  8 m/s + 16 m/s = 24 m/s

__

b) The average velocity over the 40 s period is (8 m/s +24 m/s)/2 = 16 m/s, so the distance traveled is ...

  (16 m/s)(40 s) = 640 m

Answer:

number 2

Explanation:

the 2 one is right

Answer:

a

 \(a = 21.7 \ m/s^2\)

b

\(F = 108.5 \ N\)  

Explanation:

From the question we told that

   The mass is  m  =  5 kg

    The initial speed \(u = 5 m/s\)

    The time taken to attain \(v = 70 \ m/s\) is  t =  3 s

Generally from kinematic equation we have that

     \(v = u + at\)

=> \(70 = 5 + a * 3\)

=>  \(a = 21.7 \ m/s^2\)

Generally  the force acting is mathematically represented

        \(F = m * a\)

=>      \(F = 5 * 21.7\)  

=>      \(F = 108.5 \ N\)  

Answer:

Explanation:

In this problem we are required to find the potential energy possessed by the television

Given data

mass of television m = 15 kg

height  added above the ground, h= 1-0.3 = 0.7 m

acceleration due to gravity g = 9.81 m/s^2

apply the formula for potential energy we have

P.E= m*g*h

P.E = 15*9.81*0.7 = 103 Joules

Answer:

6.25 second

Explanation:

we know that

s= (u+v)/2*T

125=20t

t=6.25 second

plz mark as brainalist

The temperature scales that have equal sized degrees are Celsius and Kelvin (option C).

Celsius is a scale for measuring temperature, with the freezing point of water defined as zero degrees and the boiling point of water defined as 100 degrees.

Kelvin scale is another scale for measuring temperature, with zero defined as absolute zero, with kelvins as the units (equivalent to degrees Celsius).

The two temperature scales with the same interval step size are the Kelvin and Celsius scales.

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During the process of adiabatic cooling, the temperature decreases because the air has Expanded to a larger volume, thereby increasing the volume of the compound and cooling the surrounding air.

The process of adiabatic cooling is a physical phenomenon in which the heat and temperature reduce due to a modification in the air pressure triggered by the expansive volume.

In conclusion, during the process of adiabatic cooling, the temperature decreases because the air has Expanded to a larger volume, thereby increasing the volume of the compound and cooling the surrounding air.

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Answer:

\(a=0.1\ m/s^2\)

Explanation:

Given that,

Initial velocity, u = 0

Final velocity, v = 2 m/s

Time, t = 20 s

We need to find the acceleration of the swimmer. The acceleration of an object is equal to the change in velocity per unit time. It can be given by :

\(a=\dfrac{v-u}{t}\\\\a=\dfrac{2\ m/s}{20\ s}\\\\a=0.1\ m/s^2\)

So, her average acceleration of the swimmer is \(0.1\ m/s^2\).

Answer:

Correct Answer: Option B

Explanation:

Explanation

P1/T1 = P2/T2

80/(273+47) = P1/(273+27) = 75Nm-2

Answer: 75.0 Nm^-2

Explanation:

P1/T1 = P2/T2 80/(273+47) = P1/(273+27) = 75Nm-2

Answer:

Explanation:

Distance = speed *time

as per the question, THE average speed is 40Km/h

time1 = S/40,time2 = S/40

now , time1 +time2

s/40+s/40

The time taken for Arun's journey can be calculated by dividing the distance to his school by the average speed. Assuming the school is 20km away, at an average speed of 40km/h, it would take Arun 30 minutes to reach school.

The question involves applying the concept of speed as being the distance traveled divided by the time it takes to get to the destination. To determine how long Arun's journey takes taking into account the average speed of 40km/h, we need to know the distance to school. However, if we assume the distance as 'd' kilometers, the time taken can be found by the formula: time = distance/speed

Let's say, for example, Arun’s school is 20 kilometers away. Using the formula time = distance/speed, we substitute the distance and speed into the formula: time = 20km / 40km/h = 0.5 hours. To convert this time into minutes, we multiply by 60 (since there are 60 minutes in an hour), which gives us 30 minutes. Therefore, if Arun’s school was 20 kilometers away, his journey would take him 30 minutes.

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A refrigerator exhausts around 400 to 700 BTUs into the kitchen, relying on the compressor's power.

In most refrigerators, a large fan blows out hot air from the compressor's cooling fins, directing it to the coils' back. These coils radiate the heat into the kitchen. The heat output of a fridge could be greater in size, i.e., the bigger the fridge, the more heat it dissipates.

Furthermore, a fridge's temperature settings affect the quantity of heat it produces; the lower the temperature, the more heat produced. Another factor to keep in mind is that a refrigerator exhausts heat into the room where it is installed; if it is installed in a hot and stuffy room, it may have to work more than usual, resulting in more heat being released into the environment. A fridge must, therefore, be positioned in a well-ventilated area to minimize heat and save energy.

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Answer:

Heat is a source of energy

Explanation:

Just took the test

The tension at which a material starts to permanently distort under load is known as yield strength. The yield strength of a material is referred to as biaxial yield strength.

when exposed to loads applied in opposite directions. It is, in other words, the amount of stress that a material can endure before simultaneously deforming in two directions. When designing materials and structures that must withstand difficult loading conditions, such as those found in mechanical, automotive, and aerospace engineering applications, this kind of strength is crucial. Testing is often used to assess a material's biaxial yield strength, which might differ depending on the composition, processing, and microstructure of the material. The yield point is the location on a stress-strain curve that denotes the end of elastic activity and the start of plastic behaviour in materials science and engineering.

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what is yield strength biaxial?

Answer:

False, true

Explanation:

Answer:

an unbalanced force is always needed to a moving object FALSE

an object in motion will stay in motion unless it is acted on by an unbalanced force TRUE

Explanation:

Please Brainliest :)

a) Calculation of the maximum operating frequency:

Maximum clock frequency = 1 / (critical path delay)

where the critical path is the longest delay between the input and output pins of a particular circuit. Here, the critical path is the clock-to-Q propagation delay, which is 100 ps.

Maximum clock frequency = 1 / 100 × 10^-12 = 10 MHz

b) Calculation of maximum clock skew:

A hold time violation happens when data input changes near the same edge of the clock signal that the previous data is sampled. Therefore, to prevent hold time violations, the clock skew must be greater than or equal to the hold time. `Thus, the maximum clock skew is:

Hold time is 50 ps. Contamination delay is 70 ps. Therefore, the clock skew should be at least 70 - 50 = 20 ps greater than the hold time to prevent a hold time violation.

Maximum clock skew = hold time + contamination delay = 50 ps + 70 ps = 120 ps

Therefore, the circuit can tolerate up to 120 ps of clock skew before it experiences a hold time violation.

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A fish appears closer to the surface of the water than it really is when observed from a riverbank. Refraction is the bending of light as it passes from one medium to another with a different optical density. In the case of the fish appearing closer to the surface of the water, this is an example of refraction because the light rays coming from the fish underwater undergo bending at the air-water interface.

When light passes from water (a denser medium) to air (a less dense medium), it changes its direction due to the difference in optical density. This bending of light causes the fish to appear higher or closer to the surface of the water than its actual position.

The other options mentioned in the question are not examples of refraction:

A parabolic mirror in a headlight focusing light into a beam is an example of reflection and focusing of light using a curved surface.

Light bending slightly around corners is an example of diffraction, not refraction.

In a mirror, when you lift your right arm, the left arm of your image is raised. This is an example of lateral inversion due to reflection, not refraction.

Therefore, the correct example of refraction from the given options is when a fish appears closer to the surface of the water than it really is when observed from a riverbank.

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Answer:

hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9

Answer:

The better choice is the line of bushes.

Explanation:

Momentum is defined as the force in a time interval. But the linear momentum is also equal to the product of mass by Velocity.

\(P=m*v\\P=1000*15\\P=15000[kg*m/s]\)

Now assuming that the truck hits the wall in a very short time interval, i.e. around 0.5 [s], we can calculate the force of the impact.

\(P=F*t\\15000=F*0.5\\F=30000[N]\)

While if you enter a region of bushes. It won't crash with a solid object. Therefore the bushes will not develop a great impact force on the truck.

According to a signal velocity, the cable length is 9.45 inches.

We need to know about the velocity to solve this problem. The velocity can be determined as the total distance divided by the total time. It can be written as

v = d / t

where v is velocity, d is distance and t is time.

From the question above, we know that

v = 80%c = 0.8c = 2.4 x 10⁸ m/s

t = 1 ns = 1 x 10¯⁹ s

The length of cable can be represented by the distance

v = d / t

d = v . t

d = 2.4 x 10⁸ . 1 x 10¯⁹

d = 0.24 m

Convert to inches (1m = 39.37 inches)

d = 0.24 m

d = 0.24 x 39.37 inches

d = 9.45 inches

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The spring constant is 1045.3 N/m.

Given data:

The vertical distance traveled is h=2 m.

The compression in the spring is x=1.5 m.

The mass of Rosario is m=60 kg.

The formula for the elastic potential energy stored in the spring is givne by,

Here, k is the spring constant.

The formula for the gravitational potential energy gained by the person is given by,

Here, g is the gravitational acceleration.

Applying the conservation of energy.

As the total of spring remains constant; therefore, the amount of gain in gravitational potential energy will be equal to the elastic potential energy of the spring. It can be applied as,

Thus, the spring constant is 1045.3 N/m.

Answer:

I'm pretty sure its 160, correct me if I am wrong

Explanation:

Answer:

ya it is 160

Explanation:

the original answer is 159.897 so if u round it to 3 Sig u get 160

Answer:

Explanation:

A concave mirror is a curved mirror that is coated outwards. The outer part of the mirror is always coated. The nature of image formed by an object placed in front of a concave mirror can be real or virtual depending on the distance of the object on the axis from the mirror. The only time the object produces a virtual image is when it is placed between the focus and the pole of the mirror. The virtual image formed is a "MAGNIFIED and upright image"

For a convex mirror, the inner part is always coated and the nature of the image formed by the object doesn't depend on the distance between the image and the mirror. No matter where the object is placed, the image formed will always be virtual, upright and DIMINISHED. This means that magnification is always less than 1.

For a plane mirror, the nature of the image produced by a plane mirror also virtual because it is always formed behind the mirror. The size of the image formed is always THE SAME as that of the object. This means that the magnification is always equal to 1.

a) In summary, the difference between virtual images produced by concave, plane, and convex mirrors is that virtual images produced by concave mirror are MAGNIFIED, virtual images produced by plane mirror are THE SAME SIZE as that of the object and virtual images produced by convex mirrors are always DIMINISHED.

b) Magnification is defined as the ratio of the image distance to the object distance. Mag = v/u

Note that object distances are always positive, hence it is only the image distance that can either be positive or negative which in turn affects the magnification causing it to be positive or negative.

Negative image distance shows that the image is virtual while positive image distance shows that the image is real.

A negative magnification therefore shows that the nature of the image is a virtual image.

Answer:

5(2)+5(7)

Explanation:

5(2)+5(7)=10+35=45

At time t, the ring experiences a magnetic force due to the interaction of the magnetic field with the current induced in the ring by Faraday's law of induction.

A magnetic field is a region of space where a magnetic force is present. A magnetic force is a force that acts on objects that have a magnetic field. This force can be felt when magnets are brought near each other, as the magnetic fields interact with each other. Magnetic fields are created by moving electric charges, and are found around electric motors, generators, wires, and magnets.

The force is directed to the left, perpendicular to the plane of the ring, and is equal to B x aI, where B is the magnitude of the magnetic field, a is the area of the ring, and I is the induced current. The induced current is equal to -(dΦ/dt)R, where Φ is the magnetic flux through the ring and R is the resistance of the ring. Therefore, the resultant force on the ring at time t is equal to B x a(-dΦ/dt)R.

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Answer:The main forces in a suspension bridge are tension in the cables and compression in the towers. The deck, which is usually a truss or a box girder, is connected to the suspension cables by vertical suspender cables or rods, called hangers, which are also in tension.

Explanation:Hope this helped u also may i have brainlist only if u wanna give me brainlist thoygh! Have an bless day and stay safe good day kindsir or ma'am.

Answer:

\(\color{pink}{HOPE} \ \color{pink}{THIS} \ \color{pink}{WILL} \ \color{pink}{HELP} \ \color{pink}{YOU}\)

Explanation:

Internal Forces:

Tension: Tension is the pulling force that acts on the cables and suspenders of a suspension bridge. ...

Compression: Compression is a pressing force that acts on the towers of a suspension bridge as they are acted upon by gravity.

Introduction of Bridge Engineering

The main forces in a suspension bridge are tension in the cables and compression in the towers.