An astronaut is on a spacewalk to make repairs to the solar panel array on the international space station. The astronaut somehow accidentally bumps into the soyuz space( the one the crew rode up to the iss) and the capsule breaks free of its dock. Which statement describes the motion of the capsules after it breaks free of the iss but before the panicked astronaut are able to retrieve it?

When an infrared heater is switched on, a person a few meters away begins to warm up, has moved from the heater to the person is transfer of thermal energy, this occurs through the movement of infrared radiation, which is a form of electromagnetic radiation with longer wavelengths than visible light.

Infrared heaters generate heat by emitting infrared radiation from their heating elements, such as quartz tubes or ceramic plates. This radiation travels through the air and is absorbed by objects and people in its path, including the person who feels the warmth. The absorbed radiation raises the temperature of the object or person, causing them to feel warmer.

Infrared radiation does not rely on direct contact or the movement of air, making it an efficient way of transferring heat over a distance. This type of heating is known as radiant heating, and it is different from convection heating, which relies on the movement of air particles to transfer heat. In summary, when an infrared heater is switched on, thermal energy moves from the heater to a person a few meters away via infrared radiation. This radiation is absorbed by the person, raising their temperature and making them feel warmer.

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The term packet size, or ensemble length, describes the number of pulses used to interrogate a color line of sight

The number of pulses needed to query a color line of sight is referred to as packet size or ensemble length. The dwell time is the period of sampling along each line of sight, which is equal to the product of the inverse of the pulse repetition frequency (PRF) and the packet size.

The number of pulses broadcast in the same direction is referred to as the ‘packet size,' and it must contain at least three pulses for velocity measurement. The beam is guided to the next color scan line after acquiring data for one color scan line.

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Answer:

Explanation:

For refraction , the formula is

sin i / sin r = μ₂ / μ₁

where light is travelling from medium 1 to 2 having refractive index of μ₁ and μ₂ . Angle of incidence in medium 1 is i and angle of refraction in medium 2 is r .

Here i = 70°, r = 37°

μ₁ = 1.8 ,μ₂ = ?

sin70 / sin 37 = μ₂ / 1.8

.939 / .602 = μ₂ / 1.8

1.56 =  μ₂ / 1.8

μ₂ = 2.81 .

The value of refraction index for the second medium will be  \(\mu_2=2.16\)

Every material has a different refractive index. The refracted index of any material shows that the light is refracted by how much angle.

So like for water its value will be different also for glass its value will be different.

Now it is given in the question that

Angle of incidence \(i=70^o\)

Refractive index of the first medium \(\mu_1=1.8\)

Angle of refraction \(r=37^o\)

Now from snells law

\(\dfrac{Sin \ i}{Sin \ r} = \dfrac{\mu_2}{\mu_1}\)

\(\dfrac{Sin70}{Sin37} = \dfrac{\mu_2}{1.8}\)

\(\mu_2= \dfrac{Sin70\times1.8}{Sin37}\)

\(\mu_2=2.16\)

Thus the value of the refraction index for the second medium will be  \(\mu_2=2.16\)

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Answer:

Explanation:

a )

hear energy required to melt 1 g of ice = 340 J ,

hear energy required to melt 80 g of ice = 340 x 80  J = 27220 J .

b ) energy gained by the melted ice ( water at O°C ) = m ct

where m is mass of water , s is specific heat and t is rise in temperature

= 80 x 4.2 x ( 8°C - 0°C)

= 2688 J .

c )

energy lost by lime juice = energy gained by ice and water

= 27220 J + 2688 J .

= 29908 J .

d )

Let specific heat required be S

Heat lost by lime juice = M S T

M is mass of lime juice , S is specific heat , T is decrease in temperature

= 320 g x S x ( 29 - 8 )°C

= 6720 S

For equilibrium

Heat lost = heat gained

6720 S = 29908 J

S = 4.45 J /g °C .

The magnetic field outside the solenoid \(B_{\text {out }}\) is zero.

The magnetic field lines are present outside the solenoid, but there are significantly less of them there than there are inside the solenoid. This is known as the flux. As a result, the magnetic field outside is thought to be almost nil. It is more accurate to assume that the magnetic field outside the solenoid is zero if the solenoid is quite long. It is false close to the solenoid's edge. We consider the magnetic field outside the solenoid to be zero for practical purposes. This amount of flux divided by the area outside the solenoids gives the flux density, which is equal to the strength of the field outside the solenoid is zero.

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Spring tides are extremely wide ranges of tidal highs and lows that occur during full moon or new moon phases when the gravitational forces of the Sun and Moon are at their strongest.

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Newton's Third Law of Motion states that springs exert a restoring force when they are pulled. The relationship between the spring force, spring constant, and spring displacement is governed by Hooke's Law.

Mass of the object= k*x/a= 26kg

what is Hooke's law?

The force (F) required to extend or compress a spring by a certain distance (x) scales linearly with respect to that distance, according to the empirical law known as Hooke's law.

according to  Hooke's law

f=-k x (-ve because spring is compressing)

from force equation f=ma m-=mass, a= acceleration , k=spring constant, x= displacemt due to compression

so, ma=-k x, (mass can not be -ve so remove -ve sign)

m=k x/a= 40*2/3=26.67 kg

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Where the first reflected pulse hits the second advancing pulse, the deflection is doubled.

A pulse in which all of the particles it disturbs move perpendicularly (at a right angle) to the pulse's direction of motion. The vibrational motion of the particles or layers of the medium in a longitudinal wave is parallel to the direction of the disturbance's propagation. When a slinky that is tied at one end sends two successive transverse pulses, one caused by a brief displacement to the right and the other by a brief displacement to the left. The deflection doubles (in comparison to that of a single pulse) when the first reflected pulse meets the second advancing pulse.

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If a space rover has a mass of 3900 kg on Earth, then its mass when it lands on Mars will be the same i.e. 3900 kg.

Mass is the amount of matter present in the object.

The mass of the object is always constant, anywhere it is on the Earth or Moon or any other planet.

Thus, If a space rover has a mass of 3900 kg on Earth, the mass on Mars when it lands will be 3900kg.

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The cremaster muscle is responsible for the elevation and contraction of the scrotum. It is innervated by the genitofemoral nerve.

The cremaster muscle plays a crucial role in the male reproductive system by assisting in the elevation and contraction of the scrotum. This muscle is located within the spermatic cord and is responsible for regulating the position of the testicles in response to various stimuli, such as temperature changes or sexual arousal.

The cremaster muscle functions to raise the testicles closer to the body, helping to maintain an optimal temperature for sperm production, or to lower them when cooling is required.

Innervation of the cremaster muscle is provided by the genitofemoral nerve. The genitofemoral nerve arises from the lumbar region of the spinal cord and consists of two branches: the genital branch and the femoral branch.

The genital branch is responsible for providing sensory innervation to the scrotum, while also supplying motor fibers to the cremaster muscle. When the genitofemoral nerve is stimulated, it triggers the contraction of the cremaster muscle, resulting in the elevation of the scrotum.

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When a body is positively charged, it implies that there is positive as well as negative charge in the body but the positive charge is more than negative charge.

Most of the materials that make up our world are composed of atoms, which are made up of a nucleus containing protons and neutrons surrounded by electrons. When an atom loses or gains electrons, it becomes positively or negatively charged, respectively. This is because the number of protons in an atom, which determines its atomic number and chemical properties, does not change.

When there are more protons than electrons, the atom becomes positively charged, and when there are more electrons than protons, it becomes negatively charged.Positive charge is the property of a material that has lost one or more electrons and therefore has more protons than electrons. Positive charges repel other positive charges, while negative charges attract positive charges.

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Answer:

Radiation is the transfer of heat energy through space by electromagnetic radiation.

Explanation:

The ratio v1/v2 of the speed of the comet at position 1 to the speed at position 2 will be the ratio of the angular velocity.

Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ices.

It should be noted that the tangential speed can alternatively be represented as;

\(\rm v_t= r\frac{d\theta}{dt}\)

where,

θ  is the comet's position angle with respect to some given direction.

The amount dθ/dt is known as angular speed

The ratio v1/v2 of the speed of the comet at position 1 to the speed at position 2 IS;

\(\rm \frac{v_1}{v_2} = \frac{\frac{d \theta_1}{dt_1} }{\frac{d \theta_2}{dt_2} } \\\\\ \frac{v_1}{v_2} =\frac{\omega_1}{\omega_2}\)

Hence,the ratio v1/v2 of the speed of the comet at position 1 to the speed at position 2 will be the ratio of the angular velocity.

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"When comparing gases with liquids, gases have high compressibility and low density.

Gases are materials that have no specific shape or volume. They don't have a fixed volume or shape. When placed in a container, gases occupy the entire volume of that container. They can be compressed or expanded quickly when subjected to pressure. Liquids are a type of material that takes the shape of its container and has a fixed volume. Liquids have the ability to flow and take the shape of their container. They have fixed volume and are incompressible. They take up the shape of their container and do not compress easily. Gases and liquids have different properties that distinguish them from one another. The differences between gases and liquids are: Gases have a higher compressibility than liquids. Liquids have a lower compressibility than gases. Gases have a lower density than liquids. Liquids have a higher density than gases. Gases can flow rapidly and are not affected by external pressure. Liquids can flow, but they are affected by external pressure. The kinetic energy of gases is high, while the kinetic energy of liquids is lower than that of gases.

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Answer:

They are spherical and hollow (not compact or dense)

Explanation:

An elastic collision is a form of a collision where kinetic energy and momentum are conserved in the process. When there is zero loss of kinetic energy and momentum, it is called a perfectly elastic collision.

This form of collision is observed in atmospheric gases and colliding balls which happens to be spherical and hollow.

Answer:

4

Explanation:

because when u have 5 then take 1 away u have 4

(a) Using the information in table 26.2, we can find the resistivity of aluminum at this temperature. From the table, we find that the resistivity of aluminum at \(50.08°C is 2.83 x 10^-8 Ωm.\)

(b) The current density J in the wire is given by:

\(J = σE\)

where σ is the conductivity of aluminum and E is the electric field. Since σ = 1/ρ, where ρ is the resistivity, we have:

J = (1/ρ)E

Plugging in the values, we get:

\(J = (1/2.83 x 10^-8 Ωm)(0.200 V/m) = 7.06 x 10^6 A/m^2\)

(c) The total current I in the wire is given by:

I = JA

where A is the cross-sectional area of the wire. The cross-sectional area of the wire can be calculated using the formula:

\(A = πr^2\)

where r is the radius of the wire, which is half of the diameter. So, we have:

\(A = π(0.100/2 x 10^-3 m)^2 = 7.85 x 10^-8 m^2\)

Plugging in the values, we get:

\(I = (7.06 x 10^6 A/m^2)(7.85 x 10^-8 m^2) = 0.554 A\)

(d) The drift speed v of the conduction electrons can be calculated using the formula:

\(v = (J/ne)(1/A)\)

where n is the number of free electrons per unit volume of the wire, and e is the charge of an electron. Since there is one free electron per atom and the atomic mass of aluminum is 26.98 g/mol, we can calculate the number density of aluminum atoms using the formula:

\(ρ = (N/V)m\)

where N is Avogadro's number, V is the molar volume of aluminum, and m is the atomic mass of aluminum. Plugging in the values, we get:

\(ρ = (6.022 x 10^23/mol)(10.0 cm^3/mol)(26.98 g/mol)/(1000 g/kg) = 2.699 x 10^22 atoms/m^3\)

Since each atom has one free electron, the number density of free electrons is also 2.699 x 10^22 electrons/m^3. Plugging in the values, we get:

\(v = (J/ne)(1/A) = (7.06 x 10^6 A/m^2)/(2.699 x 10^22/m^3)(1/7.85 x 10^-8 m^2) = 0.054 m/s\)

(e) The potential difference V required to produce the stated electric field along a length L of the wire is given by:

V = EL

Plugging in the values, we get:

\(V = (0.200 V/m)(2.00 m) = 0.400 V\)

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Answer:

Momento = 170.8 Kgm/s

Explanation:

Dados los siguientes datos;

Masa = 3,05 kg

Velocidad = 56 m/s

Para encontrar el impulso;

El momento se puede definir como la multiplicación (producto) de la masa que posee un objeto y su velocidad. El momento se considera una cantidad vectorial porque tiene magnitud y dirección.

Matemáticamente, el momento viene dado por la fórmula;

\( Momento = masa * velocidad \)

Sustituyendo en la fórmula, tenemos;

\( Momento = 3.05 * 56 \)

Momento = 170.8 Kgm/s

a. To find the total resistance, we need to consider the resistors connected in series and in parallel. The 15Ω resistor is connected in series, so we simply add its resistance to the total. The two 10Ω resistors are connected in parallel, so we need to calculate the equivalent resistance of the parallel combination.

To find the equivalent resistance of two resistors in parallel, we use the formula:

1/Req = 1/R1 + 1/R2

Substituting the values, we have:

1/Req = 1/10 + 1/10

Simplifying, we get:

1/Req = 2/10

1/Req = 1/5

So, Req = 5Ω

Now, we can calculate the total resistance by adding the resistance of the 15Ω resistor and the equivalent resistance of the parallel combination:

Total resistance

= 15Ω + 5Ω = 20Ω

b. To find the circuit's current, we can use Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). The voltage in the circuit is given as 120V, and the total resistance is 20Ω. So, we have:

I = V/R = 120V/20Ω = 6A

Therefore, the circuit's current is 6A.

c. Since the two 10Ω resistors are connected in parallel, they have the same potential difference across them. Therefore, the current in each of the 10Ω resistors is the same as the circuit's current, which is 6A.

d. To find the potential difference across the 15Ω resistor, we can again use Ohm's Law. The current flowing through the circuit is 6A, and the resistance of the 15Ω resistor is given as 15Ω. So, we have:

V = I * R = 6A * 15Ω = 90V

Therefore, the potential difference across the 15Ω resistor is 90V.

In summary:
a. The total resistance is 20Ω.
b. The circuit's current is 6A.
c. The current in each of the 10Ω resistors is 6A.
d. The potential difference across the 15Ω resistor is 90V.

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The electric force between two or more charged objects depends on the charge and the distance between the charged objects

Coulomb's law states that the force of attraction or repulsion between two charged bodies is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Coulomb's law shows the relationship between the force , charge and the distance between the bodies

therefore F= kq1q2/r²

where q1 is the charge of body 1 and q2 is the charge of body 2. r is the distance between them and k is called electrostatics constant which have a value of 9,×10⁹ Nm²/C²

Therefore what can affect the force between two charges are the product of the charge of the two bodies and the distance between the two charge.

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the first equation of motion, is determined as v = u + at.

The derivation of the first equation of motion by graphical representation​ is determined as follows;

Consider the diagram in the image attached;

Let, OE = time (t)

From the graph:

BE = AB + AE

v = DC + OD (QAB = DC  and AE = OD)

v = DC + v [QOD = u]

v = DC + v -------(1)

Now, Acceleration, a= Change in Velocity/ Time taken

a = (v – u)/ t

a = (OC – OD)/ t = DC/ t

at = DC --------(2)

By substituting the value of DC from (2) in (1):

We get:

v = at + u

v = u + at

Thus, the first equation of motion, is the relationship between the final velocity, initial velocity, acceleration and time of motion.

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Answer:

V=IR

V=0.8×2.5

V=2V

where V=potential difference

I=Current

R=Resistance

.........

A Chromebook is accelerated out a widow at 8m/s². The amount of  force was needed for this acceleration is (F)=10.88 N

When a object start with a velocity and end with other velocity, The difference of velocity divided by given time is called the acceleration. This is a vector quantity.

To calculate the force we are using the formula here is,

F=ma

Here we are given,

m= The mass of the Chromebook we know = 1.36 kg.

a = The acceleration of the object = 8 m/s².

We have to calculate the value of force = F

Now we put the values in the equation we get,

F=ma

Or, F = 1.36*8

Or, F=10.88N

From the above calculation we can say that, The amount of  force was needed for this acceleration is (F)=10.88 N

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Answer: The amount of force needed for the acceleration is F=10.88N

Explanation:

acceleration is the rate of change of velocity over time, both in terms of speed and direction. It is a vector quantity.

A mass-containing object's change in velocity is referred to as a force when a push or pull is applied to it. A body can change its state of rest or motion when an external force acts on it. It is directed and has a magnitude.

using formula, F=ma

where, F=force ; m=mass ; a= acceleration

given quantities are:

known mass(m) of Chromebook= 1.36kg

acceleration (a)= 8m/s²

on putting the values in the formula we get,

F=ma

F=1.36*8

F=10.88N

therefore amount of force needed for this acceleration of 8m/s² is 10.88N

It defines the direction in which the body or item is moving. In its basic form, speed is a scalar quantity. In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate.

Speed is the rate of movement of an object along a path in time.

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Answer:

A physical can be changed back to its original state. A chemical can not.

Explanation:

Answer:

Physical and chemical changes are similar because matter experiences a change in state. Physical changes are different because matter remains the same substance, just in a different state, whereas chemical changes change the matter

Explanation:

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Most of the energy moves through the water when it is transferred to ocean water from the moving air above it. Option c is correct answer.

When energy is transferred to ocean water from the moving air above it, the most common response is that it moves through the water. The energy transferred from the moving air above the ocean is typically in the form of wind energy, which can generate waves and currents in the water. These waves and currents carry the energy through the water, causing the water to move and creating a variety of ocean phenomena such as tides, upwelling, and ocean currents. While some of the energy may be reflected off the surface of the water or cause some water to evaporate, these are typically minor effects compared to the overall energy transfer that occurs through the water. Hence, Option c is correct answer.

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--The complete question is, What happens to most of the energy when energy is transferred to ocean water from the moving air above it? responses

a. it pushes the water forward.

b. it reflects off the surface of the water.

c. it moves through the water.

d. it causes the water to evaporate.--

Answer: It moves through the water.

Explanation: I took the quiz on k12 and got 100% and here is proof.

Answer: I believe it’s location D. Or whichever is the location of slow crystallization.

Explanation: Slow crystallization of magma forms granite. Hope this helps. :)

Answer:

D

Explanation:

The two longest resonant standing wave wavelengths in this case are 0.68 m and 0.34 m.

To find the longest resonant standing wave wavelengths in a pipe open at one end, we can use the formula λ = 4L/n, where λ is the wavelength, L is the length of the tube, and n is the harmonic number.

In this case, the length of the tube is 17 cm (or 0.17 m) and we want to find the two longest resonant standing wave wavelengths.

Using n = 1, the first harmonic, we can calculate the wavelength using the formula:
λ = 4L/n = 4(0.17)/1 = 0.68 m

Using n = 2, the second harmonic, we can calculate the wavelength using the formula:
λ = 4L/n = 4(0.17)/2 = 0.34 m

Therefore, the two longest resonant standing wave wavelengths in this case are 0.68 m and 0.34 m.

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