the figure shows a refracted light beam in linseed oil making an angle of = 17.0° with the normal line nn'. the index of refraction of linseed oil is 1.48.

Answer:

The net force is now 12

Explanation:

The boy is applying a force of 5 newtons + his mother is helping him to apply 7 newtons = 12 newtons.

The magnitude of the particle's acceleration is 0.202 m/s² and its direction is upward (in the positive z-direction).

The force on a moving charged particle in a magnetic field is given as follows:

F= q×v

Therefore, the acceleration of the charged particle is given as follows:

ā = q/m (v×B)

F = \({(1.22*10^-8 C)(3.00*10^4 m/s)j^}*(1.63T)i^ + (0.980T)j^\)

F= (3.66×10^-4 N)k^

F= ma

a=\(\frac{F}{m}\) =  \(\frac{(3.66*10^-4 N)}{(1.81*10^-3 kg)}\) = 0.202 m/s²

Acceleration is an important concept in physics and is used to describe the behavior of objects in motion. The magnitude of the acceleration is measured in units of meters per second squared (m/s²) in the International System of Units (SI).

An object accelerates when there is a net force acting upon it. This net force can be caused by many factors such as gravity, friction, or applied forces. If the net force is in the same direction as the object's velocity, the object will speed up; if it is in the opposite direction, the object will slow down. If the direction of the force is perpendicular to the direction of the velocity, the object's path will curve.

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Answer:

homo 1 3 hetero 2 4

Explanation:

Answer:

I think its dense and solid and located near a star.

Explanation:

Hope this helps, good luck.

Option C is correct. It has a high frequency. Wavelength is inversly proportional to the frequency. For short-wavelength, the frequency will be high.

Frequency and wavelength have an inverse connection with one another. As a result, the wave with a high frequency should have a short wavelength.

For short-wavelength, the frequency will be high.

Hence Option C is correct. It has a high frequency.

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Answer:

c <33

Explanation:

Given,

The mass of the board, m=5 kg

The reading on the weighing board near the feet of Annabelle, F₁=380 N

The reading of the weighing board near the head of Annabelle, F₂=280 N

The total distance between the two weighing boards, d=2.50 m

Let us assume that the centre of mass of the board lies exactly at its geometrical centre. Thus the distance of the centre of mass of the board from either of the weighing boards is l=2.50/2=1.25 m

a)

As the system is in equilibrium, the total downward gravitational force is equal to the upward reaction force applied by the boards. Thus,

Where M is the mass of Annabelle and g is the acceleration due to gravity.

On substituting the known values,

Thus Annabelle's mass is 62.35 kg

b)

The entire system is also in rotational equilibrium and net torque is zero.

Let us assume that the weighing board near Annabelle's feet is the pivot point of the system.

Therefore,

Where d_c is the distance of the centre of mass of Annabelle from her feet.

On rearranging the above equation,

On substituting the known values,

Thus the centre of mass of Annabelle is 1.05 m from her feet.

Interstellar dust clouds are best observed at a wavelength of 2.6 mm.

Interstellar dust clouds are best observed at longer wavelengths, at a 2.6 mm specifically in the infrared part of the electromagnetic spectrum.

Interstellar dust clouds consist of tiny particles, such as grains of dust and molecules, that are distributed throughout the interstellar medium between stars. These dust clouds can obscure and absorb visible light, making it difficult to observe them directly in optical wavelengths.

However, at longer wavelengths, such as in the infrared range, the dust particles in interstellar clouds emit thermal radiation. This thermal emission allows astronomers to study the properties of the dust and the structures of the clouds. Infrared observations provide valuable information about the temperature, composition, density, and distribution of interstellar dust.

By using infrared telescopes and instruments, astronomers can penetrate through the obscuring effects of dust and observe the thermal emission from the dust clouds. These observations provide insights into the processes of star formation, the evolution of galaxies, and the formation of planetary systems.

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Answer:

18 m/s

Explanation:

Given that,

Speed of river is 8 m/s due South

From the shore, you see a boat moving South with a speed of 10 m/s. Both boat and river are moving in same direction. The resultant velocity will add up.

v = 10 m/s + 8 m/s

v = 18 m/s

Hence, the rowers are moving with a speed of 18 m/s.

Answer:

A

Explanation:

just did took quiz

Nuclear power plants provide cheap electricity to power people's

homes the statement that illustrates how engineering has influenced society, therefore the correct option is A.

It is a type of power plant in which the power is generated with the help of a nuclear reactor involving a nuclear which could be either nuclear fission or fusion reaction.

There is an enormous amount of energy generated when a radioactive material goes into a nuclear reaction, this energy is utilized to form steam from the water in the nuclear reactor which is further passed through the turbine to produce the electricity.

As we can see how complex it is to produce electricity from a tiny amount of radioactive material,humanity has come so far to solve complex problems for the betterment of human society.

Science and its application with help of applicative engineering drive the growth of human civilization.

Hence , we can say that nuclear power plants provide cheap electricity to power people's homes the statement that illustrates how engineering has influenced society, therefore the correct option is A.

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If something is moving anticlockwise, it is moving in the opposite direction to the direction in which the hands of a clock move.

The terms clockwise and anti-clockwise are used to indicate the direction of a turn. So, which direction is clockwise is Clockwise is a turn to the right that follows the direction of a clock’s hands, while anti-clockwise is a turn to the left that opposes the direction of a clock’s hands.

We can detect which way the vector is heading by computing the dot product of (0,0,1). If (ab)(0,0,1) > 0, the points are anticlockwise. If (ab)(0,0,1)0, the points are arranged clockwise. If the vectors are same, they are parallel to one other. The loading is statically identical to the load FC applied at the beam’s center, plus a clockwise moment of magnitude FCt/2 and an anticlockwise moment of magnitude FCt/2.

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Answer: move with constant vilocity

Explanation:

As the effel tower being roughly perpendicular to the earth's surface,exerts an enormous perpendicular force (or pressure) on ground.For that reason when the base of eiffel tower is made broad,this enormous pressure gets spreads throughout a huge area and acts on a larger area

and hence it avoids the sinking of the tower.

neutralization reactions occur when you combine two extremely reactive substances together for the purpose of rendering them inactive, or neutral.

The velocity of the ball when it strikes the ground, given the data is 21.56 m/s

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

The velocity of the ball when it strikes the ground can be obtained as illustrated below:

v = u + gt

v = 0 + (9.8 × 2.2)

v = 0 + 21.56

v = 21.56 m/s

Thus, the velocity of the ball when it strikes the ground is 21.56 m/s

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The soil loss in  \(Mg ha^{-1}\) (Ton/ha) if the bulk density of the soil is 1.01  \(Mg m^{-3}\)  is option a. 0.202 Mg/ha.

For expressing the soil loss in \(Mg ha^{-1}\), need to convert the units appropriately. First, convert the soil loss from millimetres (mm) to meters (m) by dividing it by 1,000 (1 mm = 0.001 m). Thus, the soil loss is 0.0002 m.

Next, calculate the volume of soil lost per unit area (ha). The volume can be obtained by multiplying the soil loss (0.0002 m) by the area (ha). Since the bulk density of the soil is given as 1.01 \(Mg m^{-3}\), can convert the volume to mass by multiplying it by the bulk density.

Using the formula:

Soil loss (Mg ha-1) = Soil loss (m) × Bulk density (\(Mg m^{-3}\)) × Area (ha)

Substituting the values:

Soil loss (\(Mg ha-1\)) = 0.0002 m × 1.01 \(Mg m^{-3}\) × 1 ha

Calculating the result:

Soil loss (\(Mg ha-1\)) = 0.0002 × 1.01 = 0.000202 \(Mg ha-1\)

Therefore, the correct answer is option a. 0.202 Mg/ha.

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Answer:

Explanation:

VR ( Velocity ratio ) is the ratio of displacement to effort of load. So it is obvious that displacement takes place. Frictional force cannot change the displacement as it only an opposing force. So VR is not affected by friction.

Hope this helps

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Answer:

because VR is velocity ratio

Answer:.

Explanation:

Z

The spring constant for a spring that can store 25J of elastic potential energy when compressed by 7.5 cm is 8.9*10³ N/m.

given,

 energy stored in the  spring = E = 25J

compressed  distance = x = 7.5cm = 0.075m

  E = 1/2 * kx²

  K = 2E/x²

     = 8.9*10³ N/m

The energy that an item retains due to its position in relation to other objects, internal tensions, electric charge, or other reasons is known as potential energy in physics.

Potential energy can take many different forms. Some examples are an object's gravitational potential energy, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field. The joule, denoted by the letter J in the International System of Units (SI), is the unit of energy.

Although it has connections to the Greek philosopher Aristotle's concept of potentiality, the word "potential energy" was first used in the 19th century by the Scottish engineer and scientist William Rankine.

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The equation that shows the relationship between X₁ and X₂ in the springs is X₁ = 4X₂.

From the complete question, for case I, the two springs stretch up to the distance of X₁. Therefore, f = mg = kx₁.

For case 2, f = mg = kx₂.

Therefore, we'll equate the equations. This will be:

Kx₁ = Kx₂

(K/2)x₁ = (2k)x₂

K(x₁/2) = k(2x₂)

X₁/2 = 2x₂

X1 = 2 × 2x₂

X₁ = 4X₂.

In conclusion, X₁ = 4X₂.

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X₁ = 4X₂ is the equation that shows the connection between X₁ and X₂ in the springs.

The force required to extend or compress a spring by some distance scales linearly with respect to that distance is known as the spring force. Its formula is

F = kx

For case 1;

f=mg=kx₁

For case 2;

f=mg=kx₂

After equating the equation we get;

\(\rm Kx_1 = Kx_2 \\\\ \frac{K}{2}x_1 = (2k)x_2 = k(2x_2) \\\\ \frac{x_1}{2} =2x_2\\\\ x_1 = 4x_2\)

Hence  X₁ = 4X₂ is the equation that shows the connection between X₁ and X₂ in the springs.

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The density of the cylinder is 14100 kg/m³. The result is obtained by using the formula for density.

The density is the mass of a substance per unit of volume. It can be expressed as

ρ = m/V

Where

A cylinder is measured to have

Find its density in kg/m³!

The radius of the cylinder is

r = ½d

r = ½(3.5)

r = 1.75 inches

r = 1.75 × 2.54 cm

r = 4.4 cm

We find the volume of the cylinder.

V = ⅓ πr²l

V = ⅓ (3.14))(4.4)²(5.6)

V = 113.5 cm³

The density will be

ρ = m/V

ρ = 1600/113.5

ρ = 14.1 g/cm³

Let's convert the unit of density to kg/m³!

ρ = 14.1 × 1/1000 × 1000000/1 kg/m³

ρ = 14100 kg/m³

Hence, the cylinder has the density of 14100 kg/m³.

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The position of the center of mass of the Earth-Moon system is located 4,676 kilometers from the center of the Earth.

First, let us recall the formula for the center of mass, which is:

center of mass = (m1r1 + m2r2)/(m1 + m2)

where,

m1 and m2 are the masses of the two objects

r1 and r2 are their distances from the reference point

Earth: m1 = 5.97 x 10^24 kg,

r1 = 0 km

Moon: m2 = 7.35 x 10^22 kg,

r2 = 384,400 km (3.84 x 10^8 m)

We can ignore the radii of the two objects because they are negligible compared to their orbital radii. So the center of mass of the Earth-Moon system can be calculated as follows:

center of mass = (m1r1 + m2r2)/(m1 + m2)

= [(5.97 x 10^24 kg)(0 km) + (7.35 x 10^22 kg)(3.84 x 10^8 m)]/(5.97 x 10^24 kg + 7.35 x 10^22 kg)

= 4.67 x 10^6 m or 4,676 km from the center of the Earth

Therefore, the position of the center of mass of the Earth-Moon system is located 4,676 kilometers from the center of the Earth.

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the answer is zero (0). Isothermal process is a thermodynamic process that involves no change in temperature. Hence, during an isothermal process, the internal energy remains constant.

Therefore, the change in internal energy, ΔU = 0. Thus, the answer to your question is zero. The First Law of Thermodynamics states that the change in internal energy of a system is the sum of heat absorbed and work done by the system. It can be expressed as follows:ΔU = Q + W where ΔU is the change in internal energy, Q is the heat absorbed, and W is the work done by the system. During an isothermal process, the temperature of the gas remains constant. Hence, ΔU = 0. If 5.0 J of heat is removed from an ideal gas during an isothermal process, the gas must perform an equal amount of work to maintain its temperature. Therefore, the work done by the gas, W = -5.0 J. Since ΔU = Q + W, the change in internal energy, ΔU = Q + (-5.0 J) = Q - 5.0 J. Since the internal energy is constant during an isothermal process, the change in internal energy, ΔU = 0 - 5.0 J = -5.0 J. Hence, the answer is zero (0).

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Given, Width of gate = 1.5m rhow = 1.0 mg/m3 a = 3m, b = 1m, c = 1.3m. We have to find the force required to open the gate, F.To find the force required to open the gate, we use the following formula F = rhow  g  (a + b/2)  c  w where w is the width of the gate.w = 1.5mNow, substituting the given values in the above equation, we get F = 1.0 mg/m³  9.81 m/s²  (3 + 1/2)  1.3m  1.5mF = 69.602 NThus, the force required to open the gate is 69.602 N.

An equation is a statement in the form of a symbol that states that two things are exactly the same. Equations are written with an equal sign, as follows x + 3 = 5, which states that the value x = 2. 2x + 3 = 5, which states that the value x = 1. The statement above is an equation.

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All the paper clips, coiled wire with nail and wrapping or coiling the wire more times are the correct answers.

All the paper clips will the wire wrapped around the nail just a few times pick up. A coiled wire with nail in the center is the electromagnet design which is most successful in picking up the most paper clips. Wrapping or coiling the wire more times around the nail make the electromagnet more stronger.

If an iron nail that was much thicker was used, it will make the magnet stronger that leads to strong electromagnetism. There are three main parts that is necessary for making a motor i.e. a rotor, a stator and a commutator.

These three parts use the attractive and repulsive forces of electromagnetism, causing the motor to spin continually as long as it receives a steady flow of electric current. Motors comprise of loops of wire in a magnetic field.

When current is passed through the loops, the magnetic field exerts a torque on the loops, which rotates the shaft that leads to the generation of electricity. Water pump, mixer and washing machine are three appliances in your house that use a motor that turns electrical energy into mechanical energy.

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On prevent the puppies from tearing down the board, Ginger must apply 32 N of force to the opposite side.

The total force acting on the system is equal to the acceleration of the center of mass times the system's total mass. When applied to an extended object, Newton's second law, F = ma, predicts the motion of a specific reference point for this object.

The vector sum of all forces acting on an object is known as the net force. In other words, the net force is the sum of all the forces, taking into mind that a force is a vector and that two forces that have the same magnitude but facing the opposite direction will cancel each other out.

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The estimated azimuth and altitude of Venus is 270 degrees and 16 degrees, respectively. These values will change after an hour.

Azimuth is the angle in the horizontal plane between a celestial body and the north (or south) point of the horizon. The altitude is the angle between the celestial body and the horizon.Using a star chart, one can determine that Venus is located in the constellation Pisces, and its right ascension is approximately 0 hours, which corresponds to the vernal equinox.

Since Venus is due west, its azimuth is 270 degrees. Also, since it is a third of the way up from the horizon, its altitude can be estimated to be approximately 16 degrees.After an hour, the values of azimuth and altitude will change. Venus will have moved due to the Earth's rotation. The new azimuth and altitude can be calculated by using the formulas:azimuth_new = azimuth_old + (15 x t)altitude_new = altitude_oldwhere t is the time elapsed in hours. Since an hour has passed, t = 1. Thus,azimuth_new = 270 + (15 x 1) = 285 degreesaltitude_new = 16 degreesTherefore, the azimuth and altitude of Venus will change after an hour.

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Answer:

a = 30 m/s²

Explanation:

Given: 250 kg, 7500N    

To find: Acceleration (a)    

Solution: To find the acceleration (A), divide the force by the weight  

A = F ÷ m

=  7500 ÷  250

= 30 m/s²

Newtons are derived units, equal to 1 kg-m/s². In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second squared.

The statement that illustrates how progress in engineering has affected the natural environment is extracting mineral resources with modern mining equipment removes fertile topsoil.

The natural environment may be defined as anything that can be present in the surroundings of living entities whether it is a biotic or abiotic factor.

The utilization of contemporary mining tools terminates fertile topsoil and admiringly impacts the fertility of the soil.  It is tough to rebuild topsoil and modern mining tools constantly damage soil fertility.

Advancement in engineering has influenced the natural environment and mining is one of the most accepted measures of this.

The complete question is as follows:

Therefore, it is well described above.

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Explanation:

a) Velocity and acceleration of a car are parallel when the car is moving along a straight line in the same direction. For example, when a car is gaining speed as it moves forward in a straight line, both velocity and acceleration are directed in the same direction.

b) Velocity and acceleration of a car are anti-parallel when the car is moving along a straight line in the opposite direction. For example, when a car slows down while moving in a straight line, its acceleration is directed opposite to the direction of its velocity, or the other way around.

Answer:

a)

There is only one case where velocity and acceleration are parallel only when they are moving in the same direction.

b)

There are 3 cases where velocity and acceleration are antiparallel.

(i) When both are moving in different direction

   It means :

(ii) When the object is slowing down, where velocity and acceleration are in the opposite direction.

(iii) In case of motion reversal.

Explanation:

Astronauts always wear spacesuits that provide them with a controlled environment, protection from temperature extremes, and a supply of oxygen to survive in space.

The human body in space would be exposed to the vacuum of space, extreme temperatures, and lack of oxygen. Here's what would happen:
1. Vacuum of Space: In space, there is no air pressure. Without a spacesuit, the body's fluids, including saliva and tears, would boil due to the low pressure. This would lead to rapid evaporation of moisture from the skin, causing dehydration.
2. Extreme Temperatures: Space is extremely cold, with temperatures reaching below -270 degrees Celsius. Without proper protection, the body would quickly lose heat, leading to hypothermia. On the other hand, if exposed to direct sunlight, the body would be exposed to intense heat, resulting in burns.
3. Lack of Oxygen: In space, there is no oxygen to breathe. Within a few seconds, a person would lose consciousness due to the lack of oxygen. Eventually, without oxygen, the brain and other vital organs would cease to function, leading to death.

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