i wanna learn a little bit of physics so if anyone could teach me a thing or two it would be much appreciated

Answer:

0.95 metre

Explanation:

divide the value in centimeters by 100 because 1 meter equals 100 centimeters.

So, 95 centimeters = 95/100

= 0.95 meter.

Since cost = 0 €, the value of sinθ will be 1.  Recall that the Pythagorean identity for sine and cosine states that sin²θ + cos²θ = 1. So, sin²θ = 1 - cos²θ. Given cost=0 €,cosθ=0. Substituting cosθ = 0, we get;sin²θ = 1 - cos²θ.  sin²θ = 1 - 0² = 1Therefore,sinθ = √1 = 1  

This means that sin28 = 1  Since sin20 lies in the first quadrant (0° to 90°), it will have a positive value. To determine sin20, we can use a calculator or reference a trigonometric table. To the nearest tenth of a degree, sin20 is 0.3 and it lies in the first quadrant.

An identity that expresses the Pythagorean theorem in terms of trigonometric functions is known as the Pythagorean trigonometric identity, or simply the Pythagorean identity. It is one of the fundamental relations between the sine and cosine functions, along with the sum-of-angles formulas. The angle can be any real value, and the equation is s i n 2 + c o s 2 = 1. Given both the sine value and the quadrant in which the angle is located, we can use the Pythagorean identity to determine the angle of cosine.

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Answer:

I think the second one

Explanation:

its the only one that makes since tell me if I'm wrong

Answer:

the answer is "The atmosphere is so thin that gas molecules rarely contact each other."

Explanation: just took the semester test  

The moment of inertia,I of this assembly about the axis through which it is pivoted is  \(I=x^2(m_1+m_2+\frac{m_r}{3})\)

From figure,

we can observe that the data,

\(m_1\) = sphere 1's mass

\(m_2\) = sphere 2's mass

\(m_r\) = the weight of the rod

x= the distance between sphere 1 and pivot

x= the distance between sphere 2 and pivot

2x = total length of the rod

We must determine the expression of the sphere's moment of inertia and the expression of the rod's moment of inertia.

The formula for moment of inertia of sphere is expressed as,

\(I=mr^2...i\)

Where, m=mass of sphere

r=distance between sphere and pivot

The formula for moment of inertia of rod can be expressed as ,

\(I=\frac{ml^2}{12}....ii\)

Where,

m=mass of rod

l=length of the rod

Substituting the values of sphere 1 and sphere 2 in the eq. i,

\(I_1=m_1x^2\\\\I_2=m_2x^2\)

substitute the values of rod in the moment of inertia in eq.ii

\(I_r=\frac{m_r(2x)^2}{12}\\\\I_r=\frac{4m_rx^2}{12}\\\\I_r=\frac{m_rx^2}{3}\)

Now, the total moment of inertia is the sum of all the inertias of spheres and the rod,

\(I=I_1+I_2+I_r\\\\I=m_1x^2+m_2x^2+\frac{m_rx^2}{3}\\\\I=x^2(m_1+m_2+\frac{m_r}{3})\)

Hence, the moment of inertia of the whole assembly is \(I=x^2(m_1+m_2+\frac{m_r}{3})\)

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Your question is incomplete, here is the complete question

what is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr , m1 , m2 , and x . keep in mind that the length of the rod is 2x , not x .

Answer:

The dimensional formula for specific latent heat is L²/T²

Explanation:

The unit of specific latent heat is J/kg

The moment of resistance (MOR) of the reinforced concrete beam is approximately 1249.548 kN-m.

To determine the moment of resistance (MOR) of a reinforced concrete beam, we need to consider the properties of the concrete and steel reinforcement, as well as the dimensions of the beam.

Given:

Width of the beam (b) = 300 mm

Effective depth of the beam (d) = 600 mm

Number of reinforcement bars (n) = 4

Diameter of each reinforcement bar (diameter) = 20 mm

Concrete grade (M20) - Assuming a characteristic compressive strength of 20 MPa

Steel grade (Fe 415) - Assuming a characteristic yield strength of 415 MPa

Calculate the area of steel reinforcement:

Area of each reinforcement bar (A) = (π/4) × \((diameter)^2\)

Total area of steel reinforcement (As) = n × A

Calculate the moment of resistance (MOR) using the formula:

MOR = (0.87 × As × fy × (d - (0.42 × d)) / 1000

where:

fy = Characteristic yield strength of the steel reinforcement

Substitute the given values into the formula to calculate the MOR:

As = 4 × (π/4) × \((20 mm)^2 = 1256 mm^2\)

fy = 415 MPa

d = 600 mm

MOR = (0.87 × \(1256 mm^2\) × 415 MPa × (600 mm - (0.42 × 600 mm))) / 1000

MOR = 1,249,548 N-mm or 1249.548 kN-m

Therefore, the moment of resistance (MOR) of the reinforced concrete beam is approximately 1249.548 kN-m.

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The meteorological term used for the bomb cyclone is bombogenesis.

Bomb cyclones, also known as bomb arches, are rapidly developing storms that form when atmospheric pressure drops by at least 24 millibars in 24 hours, notes the National Oceanic and Atmospheric Administration online. The term "bombing cyclone" is coming from the meteorological term "bombogenesis" or also called an "explosive cyclone". This occurs when the central pressure of the storm system drops by at least 24 numbers in 24 hours. Some Storm systems develop rapidly, sometimes taking hours or even a day. When this happens, the system becomes very violent and can have a variety of effects. Storms that intensify very quickly are called "bomb cyclones," "weather bombs," or "bombs." 

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Answer:

A net restoring force then slows it down until its velocity reaches zero, whereupon it is accelerated back to the equilibrium position again. As long as the system has no energy loss, the mass continues to oscillate. Thus simple harmonic motion is a type of periodic motion.

(a) The new speed of the aircraft with respect to the ground is 1,539.13 mph.

(b) The direction of the aircraft is 7⁰ north east.

The new speed of the air craft is the resultant speed of the aircraft and it is calculated as follows;

R² = A² + B² - 2AB cos(R)

where;

A = 701 mph + 848 cos(13)

A = 1,527.266 mph

B = 848 x sin(13)

B = 190.76 mph

R = √(A² + B²)

R = √[(1,527.66²) + (190.76²)]

R = 1,539.13 mph

θ = arc tan (y/x) = arc tan (B/A)

θ = arc tan (190.76/1527.66)

θ = 7⁰ north east (measured anticlockwise)

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Nebulae are red because of the Balmer line, which is created when ionized hydrogen catches an electron and turns back into neutral hydrogen. Ionized hydrogen, which is abundant in nebulae.

In space, a supernova is a huge cloud of gas and dust. Some nebulae, including multiple nebulae, are made of gas and dust that have been released from the exploding of a dead star called a supernova. There are other nebulae that are star-forming regions.

The nebular theory proposes that a swirling cloud of dust, known as a nebula, composed primarily of light components, condensed into a planetary nebula, and eventually developed into a solar system made up of a star and planets in orbit.

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Answer:

(a) The magnitude of the force electric force F = k ×(+Q) × (-2·Q)/r₀² = -2·Q²/(r₀²) which can be written as follows;

\(F = \dfrac{k \times (+ Q) \times (-2\cdot Q)}{r_0^2} = -\dfrac{k \times 2 \times Q^2}{r_0^2}\)

Given that the charge of Y is twice the charge on X, we have the charge X will move towards the charge Y which is the +x direction

(b) The force, F, acting between the charges is given as follows;

\(F = \dfrac{k \times Q_1 \times Q_2}{r_0^2}\)

When, Q₁ = X = -4Q, Q₂ = Y = -2Q, and r₀ = 2·r₀ we have;

\(F = \dfrac{k \times (-4\cdot Q) \times (-2\cdot Q)}{(2 \cdot r_0)^2} = \dfrac{k \times 8 \times Q^2}{4 \cdot r_0^2} = \dfrac{k \times 2 \times Q^2}{r_0^2}\)

Therefore, the electric force exerted on object Y by the object X is the same and acts in an opposite direction to the force of X on Y in (a)

The net charge of the two objects in part (a) is Q - 2Q = -Q

The net charge of the two objects in part (b) is -4Q - 2Q = -6Q

Therefore, the net charge increases by a factor of 6 in part (b)

Explanation:

Answer:

1. 59 Ω

2. 3 Ω

3. 0.625 kΩ

Explanation:

1. The total resistance in a series circuit is equal to the sum of the resistance.

\(R_T=R_1+R_2+R_3...\\R_T=20+19+20\\R_T=59\)

Therefore, the total resistance in the first circuit is 59 Ω.

2. The total resistance in a parallel circuit is equal to the sum of the reciprocals of the resistance.

\(\frac{1}{R_T} = \frac{1}{R_1} +\frac{1}{R_2} +\frac{1}{R_3} ...\\\frac{1}{R_T} = \frac{1}{6.0} +\frac{1}{12} +\frac{1}{36}+\frac{1}{18} \\\frac{1}{R_T} = \frac{1}{3} \\R_T=3\)

Therefore, the total resistance in the second circuit is 3 Ω.

3. This is another parallel circuit, so we use the same equation from above:

\(\frac{1}{R_T} = \frac{1}{R_1} +\frac{1}{R_2} +\frac{1}{R_3} ...\\\frac{1}{R_T} = \frac{1}{10} +\frac{1}{2} +\frac{1}{1} ...\\\frac{1}{R_T} =1.6\\R_T=\frac{1}{1.6}\)

Therefore, the total resistance in the third circuit is \(\frac{1}{1.6}\) kΩ, or 0.625 kΩ.

I hope this helps!

The number of valence electrons in neutral atoms equals the atom's main group number. A periodic table column can be used to determine an element's main group number.

The position-time graph depicts the movement of an item across time. Time in seconds is traditionally represented on the x-axis, while object location in metres is plotted along the y-axis. The slope of the position-time graph offers vital information about the object's velocity.

Gravity causes objects in free fall to accelerate. As a result, the free fall motion position-time graph must be curved. This means that objects in free fall begin with a moderate velocity and gradually accelerate, as illustrated by the graph's steep downward curve.

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Because they sit high up, truck drivers have excellent visibility (option c) forward.

The statement suggests that truck drivers have a good view of the road and surroundings in the direction they are moving, which is forward.

The high position of the driver's seat in trucks provides an advantageous vantage point, allowing them to see the road ahead clearly and have a better perspective of the traffic conditions.

Sitting higher than most vehicles on the road, truck drivers benefit from an elevated position that enhances their field of vision.

This elevated viewpoint allows them to have a broader and clearer view of the road, enabling them to anticipate and react to potential hazards or obstacles in advance.

The improved visibility from the elevated seat position helps truck drivers make informed decisions while driving and enhances overall safety.

In conclusion, the phrase "truck drivers have excellent visibility because they sit high up" suggests that the excellent visibility is primarily in the forward direction, providing them with a clear view of the road and surroundings ahead.

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Answer:

Voltage, electric potential difference, electric pressure or electric tension is the difference in electric potential between two points, which is defined as the work needed per unit of charge to move a test charge between the two points.

Answer:

shirt is little attached to the body, it can come off and fly away

Explanation:

In electrostatics, charges of different signs attract and charges of the same sign repel.

In this case, when a negative charge is placed on it, both the inventor and the shirt are charged, therefore there is a repulsive force, also there is an attraction between the positive charge of the roof attracts the negative charge, such as the shirt. of weak the two forces not greater than the resistance of the walk.

As the shirt is little attached to the body, it can come off and fly away

To determine the mass of granite, we must first understand the definition of density. Density is defined as the amount of matter present in a substance per unit volume.

We use the formula: density = mass/volume to calculate the mass of a substance given its density and volume. To calculate the mass of 54.3 m³ of granite, we use the following steps:

Given Density of granite = 2700 kg/m³Given volume of granite = 54.3 m³Let us substitute the values in the formula of density:density = mass/volume Solving for mass, we get:mass = density × volume Substitute the given values of density and volume into the formula:mass = 2700 kg/m³ × 54.3 m³

The m³ unit in the volume cancels out, leaving us with kg as the unit for mass.

We then solve the equation to get the mass:mass = 146,610 kg

Therefore, the mass of 54.3 m³ of granite is 146,610 kg.

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A light, inextensible cord passes over a light, frictionless pulley with a radius of 8.9 cm. It has a 19 kg mass on the left and a 2.6 kg mass on the right, both hanging freely. The rate at which the two masses are accelerating when they pass each other is 7.44 m/s². The tension in the cord is 44.84 N.

What is tension of wire ?

In physics, tension is the force exerted on one or more bodies by ropes, cords, cables, or similar bodies. Anything that is pulled, hung, supported, or swung by a rope, cord, cable, etc., is subject to tension. Like all forces, stress can accelerate or deform objects.

Using Newton's Law to the mass m₁

m₁ g - T = m₁ a

where;

the tension T = m₁ (g -a) ----- Let this be equation (1)

For mass m₂,  

T - m₂ g = m₂ a   ------- Let this be equation (2)

equation both equation (1) and (2) together;

By rearrangement and collecting like terms;

a(m₂ + m₁) = g(m₁ - m₂)

Making acceleration (a) the subject of the formula:

a = 7.44 m/s²

According to equation (1), the cord's tension is:

Tension (T) = m1 (g -a)

T = 19(9.8 - 7.44) (9.8 - 7.44)

T = 19(2.36) (2.36)

T = 44.84 N

From this we can conclude that the speed at which the two masses accelerate as they pass each other is 7.44 m/s² and the tension in the cord as they pass is 44.84 N.

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Answer:

A.6s

Explanation:

Average time=

\(average time \: t = \frac{t1 + t2}{2 } \\ \frac{0 + 12}{2} \\ \frac{ 12}{2} \\ t = 6s\)

The second thinnest coating of magnesium fluoride for a lens system primarily used for 695 nm red light is approximately 503 nm.

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.

To determine the second thinnest coating of magnesium fluoride for a lens system primarily used for 695 nm red light, we will use the formula for thin film interference:

t = (mλ) / (2n)
where t is the thickness of the coating, m is the order of interference (1 for the thinnest coating, 2 for the second thinnest, etc.), λ is the wavelength of light (695 nm), and n is the index of refraction of MgF₂.

For the second thinnest coating (m=2), we can calculate the thickness:
t = (2 * 695 nm) / (2 * 1.38) ≈ 503 nm

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The principle of conservation of energy allows to find the result for the mechanical energy of the system is:

Mechanical energy is defined by the sum of the kinetic energy and the potential energies.

            Em = K + U

In the principle of energy conservation, it establishes that energy cannot be created or destroyed, it is only transformed, in the case of no friction, mechanized energy is conserved at all points.

They indicate that the system is rotating, which is why it is subjected to a force that expends its energy in changing the direction of the speed to keep the system in rotation, so the speed of the system remains constant.

          Em = K = ½ I w²

Consequently, using the principle of conservation of energy we can find the result for the mechanical energy of the system is:

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Answer: Job and career

Explanation:

Work is associated with job and career. If somebody is having a great career and if somebody wants a great career he will look for a job that is fitting his career and in that way, he will work for it to have an even better career which will bring him a better job.

If a  book of mass 0.4 kg is pushed to the left across a table with a force of 2.4 N. Kinetic friction provides a force of magnitude 0.8 N, then the normal force acting on the book would be 3.92 Newtons.

Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact.

As given in the problem If a  book of mass 0.4 kg is pushed to the left across a table with a force of 2.4 N. Kinetic friction provides a force of magnitude 0.8 N,

The normal force = m × g

                             =  0.4 × 9.8

                             = 3.92 Newtons

Thus, the normal force acting on the book would be 3.92 Newtons.

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Answer:

the range or the ball is 48.81 m

Explanation:

given;

Nicole throws a ball at 25 m/s at an angle of 60 degrees abound the horizontal.

find:

What is the range of the ball?

solution:

let Ф = 25°

Vo = 25 m/s

consider x-motion using time of fight: x = Vox * t

where x = R = range

t = 2 Voy

      g

R = Vo² sin (2Ф)

           g

plugin values into the formula:

R = (25)² sin (2*25)

               9.81

R = 48.81 m

therefore, the range or the ball is 48.81 m

4.8miliseconds broooo.

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Extra info related to the question :-

What is a rationlising factor ?

If the product of two irrational numbers is a rational number then each of the the two is rationalising factor of the other.

What is the purpose of rationilising the denominator ?

If the denominator of a fraction is irrational it is somewhat difficult to locate the fraction on number line. So, to make it easy we need to rationalise the denominator.

How to rationalise the denominator ?

1) Consider the denominator of the fraction.

2) Then multiply the numerator and denominator with rationalising factor of the denominator.

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The magnitude of the magnetic force on the proton is 4.31 × 10⁻¹¹ N.

Given values: B = 5.5 Tθ = 25°q = 1.602 × 10⁻¹⁹ VC = 1.00 × 10⁷ m/s Formula: The formula to calculate the magnetic force is given as;

F = qvBsinθ

Where ;F is the magnetic force on the particle q is the charge on the particle v is the velocity of the particle B is the magnetic field strengthθ is the angle between the velocity of the particle and the magnetic field strength Firstly, we need to determine the angle between the velocity vector and the magnetic field vector.

From the given data, The angle between velocity vector and x-axis;α = -15°The angle between magnetic field vector and x-axis;β = 25°The angle between the velocity vector and magnetic field vectorθ = 180° - β + αθ = 180° - 25° - 15°θ = 140° = 2.44346 rad Now, we can substitute all given values in the formula;

F = qvBsinθF

= (1.602 × 10⁻¹⁹ C) (1.00 × 10⁷ m/s) (5.5 T) sin (2.44346 rad)F

= 4.31 × 10⁻¹¹ N

Therefore, the magnitude of the magnetic force on the proton is 4.31 × 10⁻¹¹ N.

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Answer:

7.5secs

Explanation:

Using the equation of motion

v = u + at

v is the final velocity = 0m/s

u is the initial velocity = 9m/s

a is the deceleration = -1.2m/s²

t is the required time

Substitute;

0 = 9 + 1.2(t)

-9 = -1.2t

t = -9/-1.2

t = 7.5secs

hence it takes the child 7.5secs to stop

Answer:

A

Explanation:

synthesis decompostion

Answer:

Decompositon

Explanation:

Typically, units of J/molK are used to denote the gas constant R. (joules per mole per kelvin). But, by dividing by 1000, it can be changed to kJ/molK (kilojoules per mole per kelvin) units.

A fundamental physical constant that connects the characteristics of gases to one another is called the gas constant (symbolised as R). It is a proportionality constant that is mentioned in the ideal gas law, which defines how gases behave under conditions of high temperature and low pressure. According to the gas constant, which has an estimated value of 8.314 joules per mole per Kelvin (J/mol*K), a mole of gas has a volume of roughly 22.4 litres at standard temperature and pressure. To determine a gas's pressure, volume, temperature, and number of moles, the gas constant is frequently used in thermodynamics, chemistry, and physics. It is a fundamental constant that is essential to our comprehension of how gases behave.

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