Can someone please help me with this?

Taking into account the Boyle's law, the original pressure of a gas was 2.5 atmospheres and the original volume was 578 mL.

Boyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant. This is because when the volume decreases, the distance that the particles have to travel is less and therefore more shocks occur in each unit of time, that is, the pressure increases.

Mathematically, if the amount of gas and the temperature remain constant, the product of the pressure and the volume always has the same value:

P×V= k

where:

Being an initial state 1 and a final state 2, it is fulfilled:

P₁×V₁= P₂×V₂

In this case, you know:

Replacing in Boyle's law:

2.5 atm ×V₁= 1.7 atm ×850 mL

Solving:

V₁= (1.7 atm ×850 mL)÷ 2.5 atm

V₁= 578 mL

The original volume was 578 mL.

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Answer: Gravity is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth

Explanation:

To ensure proper airspace protection while holding at5,000 feet in a civil aircraft, the maximum indicated airspeed a pilot should use is 200 knots.

Indicated airspeed means that the speed of an aircraft as shown on pitot static airspeed indicator is calibrated to reflect standard atmosphere adiabatic compressible flow at sea level uncorrected for airspeed system errors.

Indicated airspeed is the airspeed which is read directly from the airspeed indicator on an aircraft and driven by the pitot-static system. It uses difference between total pressure and static pressure, to mechanically or electronically measure dynamic pressure.

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Answer:

The friction between the crate and the floor is the same amount as your pushing force when you push a crate across a level floor at constant velocity.

Explanation:

Remember that the force produced by two surfaces coming into contact and sliding against one another is frictional force. This is expressed by the direct relationship between frictional force and normal force.

f=μN

Where

f = frictional force

µ = coefficient of friction

N = Normal force

By dry friction, two solid surfaces in touch are opposed to one another's relative lateral motion. Dry friction is further separated into kinetic friction between moving surfaces and static friction (sometimes known as "stiction") between non-moving surfaces. Additionally, dry friction is typically caused by the interaction of surface characteristics, particularly rough surfaces.

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The acceleration of the ball while it is in contact with the wall is 4036.023 m/s²

ball strikes the wall at a speed of 17.9m/sec

after striking its goes in opposite direction with a speed of 16.0026m/sec

We have given that speed towards the wall is positive

So, u = 17.9m/sec

v = -16.0026m/sec

t = 0.0084 sec

We know that acceleration is given by

a = v-u/t

where

v = final speed

u = initial speed

t = time taken

a = v-u/t

a = 17.9 - (-16.0026) / 0.0084

a = 33.9026 / 0.0084

a = 4036.023 m/s²

So the acceleration of the ball while it is in contact with the wall is 4036.023 m/s²

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Answer:

The model using two cars is very simple. It will also involve the use of a recording machine.

Whilst the sound is being recorded, one model will involve the two cars traveling at approximately the same speed in the same direction with Car A blaring its horn.

They have to repeat the same experiment but this time, the two cars traveling apart from each other at approximately the same speed

The third will entail Car A being stationary and blaring the horn whilst Car B travels towards it all the while recording.

The recorder will be able to demonstrate the Doppler effect does NOT occur.

Explanation:

Doppler Effect refers to the apparent change in sound waves as an observer moves closer or farther from its source.

For example, the definition states that it is apparent which means that the source of the sound does not change the frequency of the sound waves. The sound waves appear to have a higher pitch the closer the source of the sound is to the observer and a lower pitch the farther away the source of the sound is to the observer.

Cheers

Answer:

mustt have same speed

Explanation:

The force constant of the spring is 200.696 N/m & The height the object achieves when the spring releases its energy is 2.5087 m

The spring constant is the force needed to stretch or compress a spring, divided by the compressive or expansive distance. It's used to determine stability or instability in the spring, and therefore the system it's intended for. we know,

F = kx

Therefore,

k = F/x

We also know that the force being exerted on the spring is equal to the mass of the object. Hence, F = mg = 5.13 * 9.8 N = 50.174 N and we know compression due to the mass is 0.25m. Therefore,

K = 50.174/0.25 N/m

K = 200.696 N/m

Therefore, The Spring Constant is 200.696 N/m

On release, the spring potential energy gets converted to kinetic energy. Hence, on release, the height attained by the object is given by:

h = \(1/2 kx^{2}\)

We know that k=200.696 N/m and x=0.25 m. Therefore the height is:

h = \(1/2 (200.696 N/m)(0.25 m)^{2}\)

h = 2.5087 m

Therefore, the force constant of the spring is 200.696 N/m & The height the object achieves when the spring releases its energy is 2.5087 m

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The answer is

Pitch of the buzzer increased (higher tone) as it moves towards the observer

The correct option that explains the change in the observed pitch of the buzzer as it moves  towards the observer is;

A; pitch of the buzzer increased (higher tone) as it moves towards the observer

In conclusion, the pitch of the buzzer will increase as it moves towards the observer.

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Answer:

Goodall

Explanation:

Answer:

200

Explanation:

has to be long this us just random words anseer is b. 100

If the speed of a fluid increases along a horizontal streamline, the pressure of the fluid decreases.

This phenomenon is described by Bernoulli's principle, which states that as the velocity of a fluid increases, its pressure decreases (and vice versa) when the fluid is incompressible and flowing along a horizontal streamline. This is due to the conservation of energy; as kinetic energy (associated with velocity) increases, potential energy (associated with pressure) must decrease to maintain a constant total energy.

In summary, when the speed of a fluid increases along a horizontal streamline, the pressure of the fluid will decrease, in accordance with Bernoulli's principle.

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Answer:

Explanation:

v=u+at

Final velocity v=0 , u=35m.s, a=-a , t=0.02

a=u/t = 35/0.02 = 1750 m/s2

force = mass * acceleration = 0.15 * 1750 = 262.5N

Answer:

22J+10

Explanation:

that is it in verbal expression

a) The power input to the compressor in the Carnot refrigeration cycle, in order to supply 2 kW of cooling to the room, will depend on the efficiency of the cycle and the heat transfer involved.

b) The net power input to the cycle can be determined by considering the work done by the compressor and the work done on the system.

a) To calculate the power input to the compressor, we need to determine the heat transfer from the groundwater to the room. The Carnot refrigeration cycle is an idealized cycle, and its efficiency is given by the equation: Efficiency = 1 - (T_evaporator / T_condenser), where T_evaporator and T_condenser are the temperatures at the evaporator and condenser, respectively. Using this efficiency, we can calculate the heat transfer from the groundwater and convert it to power input.

b) The net power input to the cycle takes into account the work done by the compressor and the work done on the system. It can be calculated by subtracting the work done by the compressor from the heat transfer from the groundwater. The work done by the compressor can be determined using the power input calculated in part a), and the heat transfer from the groundwater can be obtained using the given temperatures and the specific heat properties of the refrigerant.

Overall, the Carnot refrigeration cycle involves several calculations to determine the power input to the compressor and the net power input to the cycle, considering the heat transfer and work done in the system.

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Answer

The wave length in picometers for above problem was 32pm

What is wavelength?

Have you ever given any thought to why it is possible for humans to perceive colour? The explanation is that different light wavelengths of electromagnetic radiation are what give colours their distinct appearance. The visible portion of the electromagnetic spectrum is also known as visible light. These colours also come in a variety of wavelengths. Learn more about wavelength and visible light's wavelength in this article. The distance between the two crests or troughs of the light wave is known as the wavelength of light. Using the Greek letter lambda (λ), it is identified. As a result, wavelength refers to the separation between one wave's crest or trough and the following wave.

v=c/λ

v: 9.3 × 10^18 Hz c: 3.00*10^8 λ:

9.3 × 10^18 Hz

λ = 3.0010^8 m/s /9.3× 10^18

The calculated wavelength is in unit of meter. use the relationship between meter and nanometer to convert to the correct units.

= 32 nm

Explanation:

Answer:

Soln:

d=30m

t=3s

now:

v=d/t

=30/3

=10

The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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Answer:

HP is power and power is related to work by

P = W / t       work / time

W = F * S        work = force * distance

F = M * a        force = mass * acceleration

Thus  

W = M * a * S from above

Since P = W / t     we must have

P = M * a * S / t

Also S / t = average velocity over distance S

P = M * a * v

Or P = (M v ) * a

and power delivered = momentum * acceleration

Checking units:

Joules / sec = mass * meters/sec * meters /sec^2

kg m^2 / sec^3 = kg m^2 / sec^3

In raising a 5000-N piano with a pulley system, for every 1 m of rope pulled down, the piano rises 0.1  the force needed to lift the piano is 500 N Option C is correct answer.

We need to calculate the force needed to lift the piano. The formula to calculate the force is as follows:

Force = Load / Effort The load is the weight of the piano, which is given as 5000 N. Effort is the force needed to lift the load which we need to calculate. To calculate the effort, we need to find the total distance the rope is pulled which can be calculated as follows:

Total distance = Distance piano is lifted / Distance rope is pulled down  the distance piano is lifted is 1 m for every 0.1 m of rope pulled down.

Therefore, Distance rope is pulled down = 0.1 m/1m = 1/10Total distance = 1/10 * d, where d is the distance rope is pulled down. When the piano is lifted, the distance it is lifted is equal to the distance the rope is pulled down. Therefore, the distance the piano is lifted is d. Thus,

Total distance = d Therefore, Load = 5000 N Total distance = d Effort = ?Force = Load / Effort Therefore, Load / Effort = Total distance Effort = Load / Total distance = 5000 / d NAs per the question,  for every 1 m of rope pulled down, the piano rises 0.1 m. Therefore, Total distance = 10 m (If we pull down the rope by 10 m, the piano will be lifted by 1 m)Therefore, Effort = Load / Total distance = 5000 / 10 = 500 N Thus, the force needed to lift the piano is 500 N.

Option (C) is the correct answer.

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If an object is moving in a straight line, the change in velocity equals the final speed minus the initial speed.

The change in velocity of an object moving in a straight line is a measure of how much its speed has changed over time. The change in velocity is equal to the final speed minus the initial speed, and it is a vector quantity, meaning it has both magnitude and direction.

For example, if an object is moving at a speed of 10 m/s at time t1 and has a speed of 20 m/s at time t2, then its change in velocity would be;

20 m/s - 10 m/s = 10 m/s.

The direction of the change in velocity would depend on the direction of the speed change, which could be either positive (increasing speed) or negative (decreasing speed).

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A student is holding a stone at a certain height. The stone has 50 joules of potential energy and 0 joules of kinetic energy. The stone is released from that height.  the stone has 50 joules of kinetic energy right before it hits the ground, with no remaining potential energy. This energy is responsible for the stone's motion and will be dissipated upon impact with the ground.

When the stone is released from a certain height, it begins to fall under the influence of gravity. As it falls, its potential energy is converted into kinetic energy. At the same time, the total mechanical energy of the stone remains constant, assuming there is no significant loss of energy due to factors such as air resistance or friction. Initially, the stone has 50 joules of potential energy, which gradually decreases as it falls. At the same time, its kinetic energy increases, as it gains speed during its descent. This is due to the principle of conservation of energy, which states that energy cannot be created or destroyed, but only transferred or transformed.

Right before the stone hits the ground, all of its potential energy is converted into kinetic energy. This means that the stone has 50 joules of kinetic energy at that moment. The potential energy has been completely transformed into the energy of motion. Therefore, the stone has 50 joules of kinetic energy right before it hits the ground, with no remaining potential energy. This energy is responsible for the stone's motion and will be dissipated upon impact with the ground.

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Answer:

R// Por lo tanto, la aceleración que produce una fuerza de 35 N a un carrito con víveres que tiene una masa de 2800 g es de 12,5m/s².

Answer:

A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming. Modern computers have the ability to follow generalised sets of operations, called programs. These programs enable computers to perform an extremely wide range of task

Explanation:

The orbit radius of the blob in a circular orbit about the black hole is approximately 33,288 km.

The orbit radius of a blob in a circular orbit about a black hole whose mass is 13.5 times the mass of the Sun can be calculated using the formula:

r = (GMT²/4π²)1/3,  where G is the gravitational constant, M is the mass of the black hole, and T is the period of the orbit.

X-ray pulses from Cygnus X-1, a celestial x-ray source, have been recorded during high-altitude rocket flights. The signals can be interpreted as originating when a blob of ionized matter orbits a black hole with a period of 7.84 ms. Therefore,

T = 7.84 × 10⁻³ seconds

M = 13.5

Mʘ = 13.5 × 1.991 × 10³⁰ kg = 2.68585 × 10³¹ kgG = 6.67259 × 10⁻¹¹ N m²/kg²

Now, substituting the given values in the formula:

r = [(6.67259 × 10⁻¹¹ × 2.68585 × 10³¹ × (7.84 × 10⁻³)²) / (4π²)]1/3r = 33,288,375 meters ≈ 33,288 km

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(a) The power required for the car to climb the hill at steady speed is 15,555.56 W.

(b) The power required for the car to climb the hill at a changing speed is  19,444.44 W.

The power required for the car the move the incline is calculated as follows;

When the speed is steady, the average speed is calculated as;

v = ( 80km/h + 80 km/h) / 2 = 80 km/h = 22.22 m/s

P = Fv

where;

P = ( 700 N x 22.22 m/s )

P = 15,555.56 W

When the speed changes from 90 km/h to 110 km/h, the average speed is calculated as;

v = ( 90 km/h + 110 km/h ) / 2 = 100 km/h = 27.78 m/s

P = ( 700 N x 27,78 m/s )

P = 19,444.44 W

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The Horizontal distance to floor  is 0.7246 m or 72.46 cm

The reflection of the nearest part of the floor will be seen at the bottom part of the mirror.

Vertical Distance of eyes - Vertical distance of bottom edge of mirror

= 1.62 - 0.4

= 1.22 m

Note that:

Tan(theta) = Perpendicular/Base

Tan(theta) = 1.22 / 2.21

= 0.552036

Taking the inverse of tan to find theta we get: Theta = 28.9°

90° - 28.9° = 61.1°

Based on the fact that the height of the mirror and angle of reflection of the beam are known, we can calculate the horizontal distance of the floor:

Tan (61.1°) = Horizontal distance to floor / height of mirror

Tan (61.1°) = Horizontal distance to floor / 0.4

Hence Horizontal distance to floor is 0.7246 m or 72.46 cm

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A person whose eyes are H = 1.62 m above the floor stands L = 2.21 m in front of a vertical plane mirror whose bottom edge is 40 cm above the floor, shown below. What is the horizontal distance x to the base of the wall supporting the mirror of the nearest point on the floor that can be seen reflected in the mirror?

The theory describes electrons in experiments, but the electron cloud model theory has limitations in its ability to provide precise information about the exact position and trajectory of electrons in an atom.

This is due to the inherent probabilistic nature of electron behavior, as described by quantum mechanics. The electron cloud model represents the probability distribution of finding electrons in certain regions around the nucleus but does not provide specific information about the precise paths or orbits they follow.

On the other hand, a law about electrons would typically focus on the observed behavior or relationships of electrons rather than attempting to describe their precise positions or trajectories.

Laws, such as the law of conservation of charge or the law of electric current, provide general principles or rules that govern electron behavior within a given context. They are empirical observations derived from experimental evidence rather than detailed theoretical models.

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Answer:

Since F = G * m1 * m2 / r^2

F = 6.67 * 19E-11 * 2.79 * 9.47 * 10E23 / (1.2 * 10^7)^2

F = 126 * 10E-2 N  = 1.22 N