If you observe the flashlight in normal space in a dust-filled room, you see the path of light because?

Explanation:

the particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume.

Answer:

Explanation:

KE =1/2mv²

KE =1/2(1000kg)(15m/s)²

KE = 500kg (225 m²/s²)

KE = 112,500 JJ

Thermal expansion is directly proportional to the change in temperature.

Thermal expansion is directly proportional to the change in temperature. When the temperature of a material increases, the material expands due to the increase in the average kinetic energy of its particles, causing the material to occupy more volume.

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Answer:

Explanation:

A. The image in a plane mirror is virtual

B. It is the same size as the object

C. It is as far behind the mirror as the object is in front

D. It is left-right inverted

A plane mirror is described as a flat reflective surface which gives image having the following characteristics:

With the above information, we can give the correct answers to the question as follow:

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Answer:

Explanation:

The formula for Kinetic Energy is

\(KE=\frac{1}{2}mv^2\). Filling in:

\(KE=\frac{1}{2}(1200)(20)^2\) It looks like we only need 1 significant digit here but I'll give you 2 and you can round how you want.

KE = 2.4 × 10⁵ J

Answer:

we need more info

Explanation:

Answer: hello the image is missing but am able to provide you with an answer to your but I am unable to attach the image

Explanation:

Molecules at point A compared to molecules at point B shows that they are

The movement of molecules is caused by the application of energy in various forms especially thermal energy

Answer:

The answer is A!

Explanation:

Got it right on edge 2021 :>

To transition of the satellite from a circular orbit with radius R to an elliptical orbit with rmin = R and rmax = 2R, the velocity v must be increased by a factor of 2.

In a circular orbit, the centripetal force required to keep the satellite in orbit is provided by the gravitational force between the satellite and the Earth.

Fcircular = Fgravity

The centripetal force in a circular orbit can be expressed as:

Fcircular = (mv²) / R

where m is the mass of the satellite, v is the velocity, and R is the radius of the circular orbit.

The gravitational force between the satellite and the Earth can be expressed using Newton's law of universal gravitation:

Fgravity = (G × m × M) / R²

where G is the gravitational constant and M is the mass of the Earth.

Equating the centripetal force and the gravitational force, we get:

(mv²) / R = (G × m × M) / R²

Canceling the mass (m) on both sides of the equation, we have:

v² / R = (G × M) / R²

Rearranging the equation to solve for v, we get:

v = √((G × M) / R)

Now, let's consider the elliptical orbit. The minimum radius (rmin) is R and the maximum radius (rmax) is 2R.

The velocity in the elliptical orbit at rmin can be calculated using the same equation as before:

vmin = √((G × M) / rmin)

Similarly, the velocity in the elliptical orbit at rmax can be calculated:

vmax = √((G × M) / rmax)

Now, we need to find the ratio of vmax to vmin:

vmax / vmin = √((G × M) / rmax) / √((G × M) / rmin)

Simplifying the expression:

vmax / vmin = √(rmin / rmax)

Substituting the given values rmin = R and rmax = 2R:

vmax / vmin = √(R / (2R))

Simplifying further:

vmax / vmin = √(1 / 2)

Taking the square root of 1/2:

vmax / vmin = 1 / √2

Rationalizing the denominator:

vmax / vmin = √2 / 2

Finally, we can see that vmax is twice vmin:

vmax = 2 × vmin

Therefore, to transition from a circular orbit of radius R to an elliptical orbit with rmin = R and rmax = 2R, the velocity v must be increased by a factor of 2.

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Answer:

Explanation:

Given the velocity of a particle modeled by the equation

v = 13-3t+8t² where t is in seconds

Given t = 0 and position s = +5m

A) To get the position as a function of time, we will integrate the function with respect to t ad shown;

v = 13-3t+8t²

S = ∫13-3t+8t² dt

S = 13t-13t²/2+8t³/3 + C

at t = 0 and S = +5m

5 = 13(0)-13(0)²/2+8(0)³/3+C

5 = 0-0+0+C

C = 5

Substituting c = 5 into the displacement function

S = 13t-13t²/2+8t³/3 + C

S = 13t-13t²/2+8t³/3 + 5

B) acceleration is the change in velocity with respect to time.

a = dv/dt

Given v = 13-3t+8t²

a= dv/dt = -3+16t

a = 16-3t

C) acceleration at t = 6s is derived by plugging in t = 6 into the resulting equations in (B)

a = 16-3t

a = 16-3(6)

a = 16-18

a = -2m/s²

D) net displacement from t = 0 to t = 6s

At t = 0:

S(0) = 13(0)-13(0)²/2+8(0)³/3 + 5

S(0) = 0+5

S(0) = 5m

At t = 6s

S(6) = 13(6)-13(6)²/2+8(6)³/3 + 5

S(6) = 78-234+576+5

S(6) = 425m

Net displacement from t = 0s to t = 6s is s(6)-s(0)

= 425-5

= 420m

E) Total distance travelled D = S(6)+S(0)

= 425+5

= 430m

F) Average velocity = ∆S/∆t

Average velocity = S(6)-S(0)/6-0

Average velocity = 425-5/6

Average velocity = 420/6

Average velocity = 70m/s

To calculate the volume of the balloon, we need to use the concept of buoyancy. The buoyant force acting on the balloon is equal to the weight of the air and helium displaced by the balloon. The volume of the balloon is approximately 111.82 m³.

We can assume that the volume of the balloon is the same as the volume of the air and helium it contains.
Let's first calculate the weight of the air and helium in the balloon. The total mass of the system is 102 kg, so the weight is 102 x 9.81 = 1000.62 N. The weight of the air in the balloon is equal to the density of air multiplied by the volume of air in the balloon, which we'll call V. Similarly, the weight of the helium and air mixture in the balloon is equal to the density of the mixture multiplied by V, and the weight of the helium is equal to the density of helium multiplied by V.
So we have:
(1.29 kg/m3) x V + (0.372 kg/m3) x V = (102 kg / 9.81 m/s2)
1.662 kg/m3 x V = 1038.25 N
V = 623.95 m3
Therefore, the volume of the balloon is approximately 623.95 m3.
To find the volume of the balloon, you can use the buoyancy principle. The buoyant force acting on the balloon equals the weight of the displaced air.
Buoyant force = (mass of payload + mass of empty balloon) * g
where g is the acceleration due to gravity (approximately 9.81 m/s²).
The weight of the displaced air equals the difference in density between the air and the helium-air mixture, multiplied by the volume of the balloon:
Buoyant force = (air density - helium-air mixture density) * volume * g
We know the mass of the payload and the empty balloon is 102 kg, and the densities are given. We can now solve for the volume:
(1.29 kg/m³ - 0.372 kg/m³) * volume * 9.81 m/s² = 102 kg * 9.81 m/s²
0.918 kg/m³ * volume * 9.81 m/s² = 1000.62 kg * m/s²
Divide both sides by 0.918 kg/m³ and 9.81 m/s²:
volume = 1000.62 kg * m/s² / (0.918 kg/m³ * 9.81 m/s²)
volume ≈ 111.82 m³
The volume of the balloon is approximately 111.82 m³.

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The following statements are true concerning sign conventions for image formation:

A converging lens causes parallel light rays to converge to a focal point in front of the lens, so the focal length is negative. For an upright image, the magnification is positive because the image is larger than the object and the image is erect, whereas for an inverted image, the magnification is negative because the image is smaller than the object and the image is upside-down.

A virtual image is formed when light appears to be coming from a point behind the mirror or lens, so the image distance is positive; a real image is formed when light actually converges at a point in front of the mirror or lens, so the image distance is negative. When the object is on the same side of the reflecting or refracting surface as the incoming light, the object distance is positive because it is measured from the lens or mirror, whereas when it is on the opposite side, the object distance is negative because it is measured from the focal point.

The statement "when the center of curvature of a spherical mirror is on the same side as the reflected light, the radius of curvature is positive; otherwise, it is negative" is incorrect. The sign convention for the radius of curvature of a spherical mirror is that it is positive when the center of curvature is on the opposite side of the mirror from the object, and negative when it is on the same side as the object.

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Answer:

Acceleration is zero

Explanation:

if the acceleration is zero, then the velocity-time graph is a horizontal line (i.e., the slope is zero). If the acceleration is positive, then the line is an upward sloping line (i.e., the slope is positive).

Answer:

160 years.

Explanation:

From the question given above, the following data were obtained:

Initial count rate (Cᵢ) = 400 count/min

Half-life (t½) = 40 years

Final count rate (Cբ) = 25 count/min

Time (t) =?

Next, we shall determine the number of half-lives that has elapse. This can be obtained as follow:

Initial count rate (Cᵢ) = 400 count/min

Final count rate (Cբ) = 25 count/min

Number of half-lives (n) =?

Cբ = 1/2ⁿ × Cᵢ

25 = 1/2ⁿ × 400

Cross multiply

25 × 2ⁿ = 400

Divide both side by 25

2ⁿ = 400/25

2ⁿ = 16

Express 16 in index form with 2 as the base

2ⁿ = 2⁴

n = 4

Thus, 4 half-lives has elapsed.

Finally, we shall determine the time taken for the radioactive material to decay to the rate of 25 counts per minute. This can be obtained as follow:

Half-life (t½) = 40 years

Number of half-lives (n) = 4

Time (t) =?

n = t / t½

4 = t / 40

Cross multiply

t = 4 × 40

t = 160 years.

Thus, it will take 160 years for the radioactive material to decay to the rate of 25 counts per minute.

Answer:

The penny would take 10 seconds to fall.

Explanation:

Hope this helps!!

If a penny is dropped from a building that is 95 m tall then it would 3.111 seconds take the penny to hit the ground below

There are three equations of motion given by  Newton

The first equation is given as follows

v = u + at

the second equation is given as follows

S = ut + 1/2×a×t²

the third equation is given as follows

v² - u² = 2×a×s

Keep in mind that these calculations only apply to uniform acceleration.

As given in the problem, A penny is dropped from a building that is 95 m tall,the initial velocity of the penny is zero, the acceleration acting is due to the acceleration due to gravity

height of the building (S) = 95 meters

initial velocity(u) = 0 m/s

acceleration(a) = 9.81 m/s²

By using the second equation of motion given by newton

S = ut + 1/2at²

S = 95 m ,u= 0 m/s , a= 9.81 m/s² and t =? seconds

95 = 0 + 9.81t²

t² = 95/9.81

t = 3.111 seconds

Thus, if a penny is dropped from a building that is 95 m tall then it would   take 3.111 seconds for the penny to hit the ground below

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The slit width when The distance between the first and fifth minima of a single slit diffraction pattern is 0.35 mm with the screen 40 cm away from the slit, when light of wavelength 550 nm is used is 2.514mm.

Given the distance between the first and fifth minima of a single slit diffraction pattern is (s) = 0.35mm = 0.35 x 10-3m

Let m1 = 1 and m2 = 5 represent the minima

distance of screen from the slit (d) = 40cm = 0.4m

wavelength of light used (λ​) = 550nm = 550 x 10-9m

Let the slit width = a

We know that a = mλ/ sinθ

To know the angle we take the distance of screen from slit in vertical direction as Δy where Δy = 0.35mmThen

sinθ = Δy/d

Then a = mλ/ (Δy / d)

a =  (m2-m1) x λ x d/(Δy) = (5-1) x  550 x 10-9 x 0.4/0.35x10-3

a = 2.514mm

Hence the slit width = 2.514mm

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The quotation highlights the colonists' fear and uncertainty about their new environment. The phrase "the Martian air might draw his soul from him" suggests that the atmosphere of Mars is so inhospitable that it could kill the colonists.

The second quotation highlights the colonists' isolation and the fragility of their situation on Mars.

"The wind blew, whining. At any moment the Martian air might draw his soul from him, as marrow comes from a white bone." The story takes place on Mars, where a group of human colonists have settled after leaving a war-torn Earth. The comparison to "marrow coming from a white bone" is a vivid metaphor that conveys the idea of something being drawn out of a person with great force.

"A radio flash just came. Atom bombs hit New York! All the space rockets blown up. No more rockets to Mars, ever!" The colonists on Mars receive this radio message, which tells them that a catastrophic event has occurred on Earth. The news that atom bombs have hit New York and that all the space rockets have been destroyed is a devastating blow to the colonists, who had been hoping to receive supplies and reinforcements from Earth. It also suggests that their dreams of building a new civilization on the red planet may be dashed by events beyond their control.

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Answer:

I = 30 A.

Explanation:

Given that,

The voltage of the battery, V = 230 V

Power used to charge the battery, P = 6.9 kW

We need to find the current used to charge the battery. The formula for the power is given by :

P = VI

Where

I is current

So,

\(I=\dfrac{P}{V}\\\\I=\dfrac{6.9\times 10^3}{230}\\\\=30\ A\)

So, the required current is 30 A.

The new water temperature after dropping the copper pellets into the water will be approximately 28.3°C.

To find the new water temperature, we can use the formula Q = mcΔT, where Q is the heat transfer, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. For this problem, we need to consider the heat exchange between the copper pellets and water.

Copper specific heat capacity: 385 J/kg°C
Water specific heat capacity: 4,186 J/kg°C

First, convert the mass of copper pellets to kg:
30 g = 0.03 kg

Next, calculate the heat transfer for the copper pellets as they cool down:
Q_copper = m_copper * c_copper * ΔT_copper
Q_copper = 0.03 kg * 385 J/kg°C * (T_final - 300°C)

Now, calculate the heat transfer for the water as it heats up:
Q_water = m_water * c_water * ΔT_water
100 ml of water = 0.1 kg (assuming 1 g/ml density)
Q_water = 0.1 kg * 4,186 J/kg°C * (T_final - 20°C)

Since the heat transfer between copper and water is equal (Q_copper = Q_water):
0.03 kg * 385 J/kg°C * (T_final - 300°C) = 0.1 kg * 4,186 J/kg°C * (T_final - 20°C)

Now, solve for T_final:
T_final ≈ 28.3°C

So, the new water temperature will be approximately 28.3°C.

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A good relationship must possess the attributes of communication and trust. Without trust, there can be no intimacy, and without communication, there can be no understanding.

This is a true expression of the truth. In order to build a solid and lasting connection between two individuals, communication and trust are essential elements of a good relationship.

Absolutely! Relationships that lack open and honest communication, as well as trust, are likely to be unstable and can lead to misunderstandings, conflicts, and even a breakdown of the relationship over time. Building a strong foundation of trust and communication can help ensure that a relationship can withstand challenges and grow stronger over time.

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Numerous tiny ice and rock fragments make up the planet's ring system. The four jovian planets differ from one another in terms of colour and shape.

All rings lie in the planet's equatorial plane. Jupiter's rings are the brightest and widest among jovian planets. Their particles consist mostly of small, dark rock fragments. Saturn's rings are mostly dusty and less visible. Uranus and Neptune both have narrow bright rings divided by very sparse dusty rings in between. Uranus's narrow rings show irregularities in the form of brighter arcs, as if the rings were incomplete.

Planetary rings are made up of countless small particles composed of ice and rock. All rings lie in the equatorial plane. Rings' particles have elliptical orbits. Saturn's rings are the brightest and widest among jovian planets. Their particles consist mostly of ice. Jupiter's rings are mostly dusty and less visible. Uranus and Neptune both have narrow bright rings divided by very sparse dusty rings in between. Neptune's narrow rings show irregularities in the form of brighter arcs, as if the rings were incomplete.

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Answer:

\( \huge \boxed{ \boxed{2 + \sqrt{3}}} \)

Explanation:

Answer:

1)  ΔE = -800 J, 2) ΔE = 200 J, 3)  ΔE = -200 J, 4) ΔE = 800 J

Explanation:

For this exercise let's use the first law of thermodynamics

          ΔE = Q + W

Where we will apply this expression to several cases

1) output Q = 500 J and does work of W = 300 J.

The two processes involve an energy output

         ΔE = - 500 - 300

         ΔE = -800 J

Therefore, the internal energy of the gas decreases by this amount,

2) enter Q = 500J and do work of W = 300 J

         Positive heat is added and does negative work

         ΔE = 500 - 300

         ΔE = 200 J

3) they leave Q = 500 J and do (work on the gas) W = 300J

negative heat and positive work come out

          ΔE = -500 + 300

          ΔE = -200 J

4) heat enters Q = 500 J, work on gas W = 300 J

both positive

         ΔE = 500 + 300

         ΔE = 800 J

Answer:

Calor absorbido, Q = 52325 Joules

Explanation:

Dados los siguientes datos;

Masa = 250g to kg = 250/1000 = 0.25kg

Temperatura inicial, T1 = 10°C to Kelvin = 273 + 10 = 283K

Temperatura final, T2 = 60°C to Kelvin = 273 + 60 = 333K

Capacidad calorífica específica = 4186 j/kg.K.

Para encontrar la cantidad de calor necesaria;

La capacidad calorífica viene dada por la fórmula;

\( Q = mct \)

Dónde;

Q representa la capacidad calorífica o la cantidad de calor.

m representa la masa de un objeto.

c representa la capacidad calorífica específica del agua.

dt representa el cambio de temperatura.

dt = T2 - T1

dt = 333 - 283

dt = 50 K

Sustituyendo en la fórmula, tenemos;

\( Q = 0.25*4186*50\)

\( Q = 52325 \)

Calor absorbido, Q = 52325 Joules

Answer:

F=ma

3.07=1.35(a)

3.07/1.35 = a

a=2.27m/s^2

Explanation:

Since the question gives us both the force and mass of the object we can use the f= ma equation and just plug in both the force and mass and just solve for acceleration. I believe the degree listed in the question is just there to throw you off.

The angular magnification (M) obtained with a thin lens used as a simple magnifier when the object is at the focal point is -1.

The angular magnification is given by the formula:

M = -f / (f - d)

Where:

M is the angular magnification,

f is the focal length of the lens,

d is the distance between the object and the lens.

In this case, since the object is at the focal point, the distance between the object and the lens (d) is equal to the focal length of the lens (f). Substituting the values, we have:

M = -f / (f - f)

M = -f / 0

M = -1

Therefore, when the object is at the focal point, the angular magnification obtained with the lens is -1.

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1.

The values of x, y, and z in the equation\(V = KT^xL^yM^z\) are:

x = 1/2

y = 0

z = 1.

2. The derived expression relating V, T, L, and M is:

V = K√(T*M)

we can We use the  dimensional analysis.

The equation \(V = KT^xL^yM^z,\)

V=  velocity, which has dimensions of \([L][T]^-^1\)

T = tension, which has dimensions of\([M][L][T]^-^2\)

L= length, which has dimensions of [L]

M = mass per unit length, which has dimensions of \([M][L]^-^1\)

We then equate the dimensions on both sides of the equation:

\([L][T]^-^1 = K[M][L][T]^-^2^x[L]^y[M]^z[M][L]^-^1\)

For length: [L] =\([L]^(^y^+^z^)\)

This gives us y + z = 1.

For time:\([T]^-^1 = [T]^-^2^x\)

and we have  -1 = -2x

x = 1/2.

For mass:\([M][L]^-^1 = [M]^z\)

z = 1.

2.

We then have that  the derived expression relating V, T, L, and M is:

\(V = KT^(^1^/^2^)L^0M^1\)

V = K√(T*M)

In conclusion, this expression shows the relationship between velocity (V), tension (T), length (L), and mass per unit length (M) of the string.

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According to the given statement the energy is stored in Long solenoid is U = 2.14 × 10⁻⁶ J.

Energy is a crucial part of our everyday life although becoming an basic human need. The buildings that people have constructed are heated and cooled by energy. To raise a foot, get out of couch, or even simply walk and along main path, you need energy.

Briefing:

The diameter of the solenoid is given as 3cm or 0.03m.

The length of the solenoid is given as 12cm or 0.12m.

Current is given as 0.79A

The cross-sectional area of the solenoid is

A = πd²/4

A = π (0.03)²/4 = 0.000225m²

Inductance of the solenoid can be found out using the below formula,

L = μ₀ N² A/l

where, μ₀ is vacuum permeability

N is number of turns

A is cross-sectional area

l is length

L = μ₀ N² A/l

L = 4π × 10⁻⁷ * (150)² *0.000225/0.79 = 8.05 × 10⁻⁶ H

U = 1/2 L*i²

U = 0.5 * 8.05 × 10⁻⁶ * (0.73)²

U = 2.14 × 10⁻⁶ J

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Answer:

FIRST OF ALL get to know her, and DON'T STARE AT HER ALL THE TIME! And then you just let her know that you like her!

Explanation: HOPE THIS HELPS!

Answer:

Solar eclipses may be classified as either total, in which the Moon completely covers the Sun, or annular, in which the Moon obscures all but an outer ring of the Sun.