1. How do the magnetosphere and plasmasphere protect Earth? Select all that apply.
by deflecting most of the solar wind
by allowing all of the Sun's energy to reach Earth's surface
by preventing Earth from being stripped of its protective layers
by causing our rotation to be on a tilted axis

Answer:

255 metres

Explanation:

The answer to the question is actually quite simple. Since the car goes for 3.4 seconds, and it goes 75 metres every second, the answer is just 3.4 multiplied by 75 Metres.

Answer:

Explanation:

According to conservation of energy, the energy of interacting bodies in a closed system remains constant. The total energy of an isolated system remains constant; it is said to be conserved over a period of time.

Elastic energy is the mechanical implicit energy stored in the configuration of a material or physical system as it's subjected to elastic distortion by work performed upon it. Elastic energy occurs when objects are impermanently compressed, stretched or generally misshaped in any manner.

The mechanical energy is never lost forever , rather it gets converted to thermal energy because of the friction .

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Answer:

40.1 m/s or 144.36 km/h

Explanation:

The equation is (v=∆ f/f) x (c/2)

V is velocity

delta f is returned frequency minus intial frequency divided by the initial frequency

c is the speed of light in m/s divided by 2

v= (400,000,109 Hz - 400,000,002 Hz)/400,000,002Hz x (299,792,458 m/s)/2

Therefore, the work done by the force F=12i-10j on an object as it moves from the origin to the point r=13i+11j is 203.06i + 171.82j.

The formula for calculating the work done by a force F when an object is moved from point A to point B is:

W = F. d

Where, W = work done by the force F, F = magnitude of the force, d = displacement vector of the object from point A to point B

Therefore, the work done by the force F=12i-10j on an object as it moves from the origin (point A) to the point

r=13i+11j (point B) can be calculated as follows:

First, we need to find the displacement vector (d) of the object from point A to point B. This is given as:

r - r0 = 13i + 11j - 0i - 0jr - r0 = 13i + 11j - 0 - 0j (where r0 = 0i + 0j is the position vector of the origin

So, the displacement vector of the object from point A to point B is

d = 13i + 11j.

Next, we need to find the magnitude of the force F, which is given as:

F = 12i - 10j

Magnitude of F = √(12² + (-10)²) = √(144 + 100) = √244 = 15.62 (approximately)

Now, we can use the formula W = F. d

to find the work done by the force

F.W = F. d= (15.62)(13i + 11j) (since F = 12i - 10j)

W = (15.62)(13i) + (15.62)(11j)

W = 203.06i + 171.82j

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The maximum speed of this car is equal to 8.90 m/s.

In Mathematics and Science, the centripetal acceleration of a physical object (body) can be calculated by using the following mathematical expression:

A = V²/r

Where:

Based on the information provided, the centripetal acceleration experienced by this car can be determined as follows;

A = 0.60g

A = 0.60 × 9.8

A = 5.88 m/s²

Note: Radius = diameter/2 = 27/2 = 13.5 m.

Now, we can determine the maximum speed of this car:

V = √Ar

V = √(5.88 × 13.5)

V = 8.90 m/s.

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Complete Question:

In a roundabout (or traffic circle), cars go around a 27-m-diameter circle. If a car's tires will skid when the car experiences a centripetal acceleration greater than 0.60g, what is the maximum speed of the car in this roundabout?

Answer:

s = 50.4 m

Hence, the point C is 50.4 m towards east from point B

Explanation:

Since, the motorcyclist travels at a constant speed in straight line towards east after point B. Therefore, we can use the following equation in this case:

s = vt

where,

s = distance covered = position of point C = ?

v = uniform speed of motorcyclist = 18 m/s

t = time interval = 2.8 s

Therefore,

s = (18 m/s)(2.8 s)

s = 50.4 m

Hence, the point C is 50.4 m towards east from point B

Answer:

d: 870 Hz

Explanation:

Answer:

HELIOS- The god of the sun in

HAZMAT-Hazardous materials

NIRSpec- Near Infrared Spectrograph

Explanation:

The acronyms will be:

HAZMAT is an abbreviation for “hazardous material that is the substances in quantities or forms that may pose a reasonable risk to health, property, or the environment.

Near-infrared spectroscopy (NIRS) is a brain imaging method that measures light absorbance to calculate oxy-hemoglobin (oxy-HB) and deoxy-hemoglobin.

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Answer: Acceleration

Detailed Explanation:

Acceleration is defined as the rate of change of velocity.

Answer:

There is direct evidence that the weak and electromagnetic forces were once unified as a single electroweak force from the study of subatomic particles.

Explanation:

The discovery of the W and Z bosons, which are particles that mediate the weak nuclear force, provided strong evidence that the weak force was once part of a larger electroweak force. The fact that the W and Z bosons have electric charge, and that their masses are related to the masses of the photon (the particle that mediates the electromagnetic force), supports the idea that the weak and electromagnetic forces were once part of a single electroweak force. Additionally, the mathematical symmetry of the electroweak theory, which unifies the weak and electromagnetic forces, provides further evidence for this theory.

Answer:

Statement D about pneumatic systems is true. Pneumatic systems are cleaner than hydraulic systems.

Pneumatic systems are employed in a wide range of manufacturing and assembly applications. They can be used to transport objects on production lines as well as in maintenance facilities.

In hydraulic systems liquid is used as fluid for the force transmission. While in the pneumatic system air is used causing more cleanliness in the system.

The pneumatic systems are cleaner than hydraulic systems.

Hence, a statement D about pneumatic systems is true.

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Answer:

\(speed \: = \frac{distance}{time} \\ speed \times time = distance \\ 8.3ms^{ - 1} \times 1200s \\ 9960m\)

30km/h = 8.3ms^-1

20min = 1200s

If a car moves along a straight path with a speed of 30 kilometers per hour then it would cover a distance of 10 kilometers in  20 minutes​.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

As given in the problem If a car moves along a straight path with a speed of 30 kilometers per hour then we have to find how much distance will the car travel in 20 minutes​

the distance covered in 1 hour = 30 kilometers

the distance covered in 60 minutes = 30 kilometers

the distance covered in 1 minute  = 30/60 kilometers

the distance covered in 20 minutes = 20 ×30/60 kilometers

                                                            = 10  kilometers

Thus, the car would cover a distance of 10 km in 20 minutes.

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The speed of the automobile after 1.32 s have elapsed is 11.77 m/s

we are given the speed which is  19.8 m/s and the time which is  1.32 s.As we know  that acceleration is the rate of change of velocity,  so the formula we can use is to calculate the value of velocity

v = u + a t  .................. (1)

here the t is the time taken, u is the initial velocity and a is  the acceleration. As after slamming the brakes, there rising up an  external force which  is due to friction, and it is equal to the  product of normal force and coefficient of kinetic friction, as  it is only external  force acting horizontally and here the normal force is equal to the gravity

using Newton's 2nd Law,

F(total) = ma

=> Ff = m a

⇒ -μk *m*g = m.a

=> a = -  0.620*9.8 =  -6.076

substituting the value of  a, and other values in equation  1

=> v= 19.8 +(-6.076)*1.32 = 11.77 m/s

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The reason behind action and reaction forces not balance each other out is d)because the action force acts on the carriage, while the reaction force acts on the horse. So, correct option is d.

Forces generally act two by two, which are known as activity and response forces.

The activity force is the power applied to an article by the first activity, and the response force is an equivalent power applied by the item the other way.

A power that is applied to an item is alluded to as an activity force. A response force is the consequence of an inverse heading activity force.

Newton's third law of motion tends to these two forces, alluded to as activity and response powers.

The depicted activity and response powers don't adjust each other out in light of the fact that the activity force follows up on the carriage and the response force follows up on the pony.

Hence, correct option is d.

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(Complete question) is:

A horse pulls on a carriage. By Newton's third law, the carriage pulls back on the horse with equal force. Why do the action and reaction forces just described not balance each other out?

A.

because this is not an action--reaction pair

B.

because action and reaction forces are not equal in magnitude in this case

C.

because action and reaction forces act in the same direction in this case

D.

because the action force acts on the carriage, while the reaction force acts on the horse

Answer:

Nedecito puntos para mi tares

Answer:

D. It is very small when compared to the universe

Explanation:

The Milky Way can be regarded galaxy which has Solar System in it. Milky way gives the description of appearance of galaxy from Earth, it is a hazy band of light that's been formed from the stars which can be visualized in the sky during the night, though it cannot be sorted by mere human eyes. Milky Way has existed for about 13.51 billion years with the radius of 52,850 light years. the Number of stars in milky way is about 100-400 billion. It should be noted that themilky way galaxy is a very large galaxy but It is very small when compared to the universe

.

Answer:

A. Perpendicular

Explanation:

Clarification:

The inquiry is inadequate as it does not have the picture of the rope wave movement.

From all that, we can say that;

The rope's are moving at the same time in a similar example without contacting one another.

This is hence a mechanical wave being made with the movement having motions that are opposite to the course of energy move of the ropes.

This is a meaning of cross over waves in light of the fact that the rope molecule movement is opposite to the wave movement.

Perpendicular describes the motion of the rope particles in relation to the motion of the rope wave shown in the photograph. Hence option A is Correct.

Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase.

Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase.

Phase is the position of a wave at a point at time t on a waveform.

There are two types of the wave longitudinal wave and transverse wave.

Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave.  Sound wave is a longitudinal wave.

Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a longitudinal wave.

In the picture we can see that wave is traveling in the direction out of the paper and rope particle is vibrating along Y axis perpendicular to the propagation of the wave.

Hence Perpendicular option is correct.

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A square loop of wire that encloses an area of 0.20 m² is in a uniform magnetic field of 0.10 t. The flux through the loop if its plane is at an angle of 62 degrees to the field is 1.8 × 10⁻² Wb.

The amount of magnetic field lines passing through a loop of area A which is tilted at angle θ from the field is defined as magnetic flux and is found by the below formula Φm = B A cos ⁡θ.

Given,

Area of the loop, A = 0.20 m² = 20 × 10⁻² m²,

Magnetic field, B = 0.10T,

As we know, Magnetic flux through a loop (Φm),

⇒ Φm = BA cos ⁡θ

⇒ Фm = 0.1 × 20 × 10⁻² × cos 62°

⇒ Фm = 2 × 10⁻² × 0.47

⇒ Фm = 1.8 × 10⁻² Wb.

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A change in pressure will cause a corresponding change in the size of the air bubble trapped inside the test tube.

The relationship between pressure and volume of a gas is described by Boyle's Law, which states that at a constant temperature, the pressure and volume of a gas are inversely proportional. Mathematically, this can be expressed as P1V1 = P2V2, where P1 and V1 are the initial pressure and volume of the gas, and P2 and V2 are the new pressure and volume of the gas, respectively.

Therefore, if the pressure inside the test tube increases, the volume of the air bubble trapped inside will decrease, and vice versa. For example, if the pressure inside the test tube doubles, the volume of the air bubble will be reduced to half of its initial volume.

A change in pressure will cause a corresponding change in the volume of air trapped inside the test tube, according to Boyle's Law. This relationship between pressure and volume is important in many areas of science and technology, such as in the design of engines, compressors, and pneumatic systems.

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Answer:

Limestone classifacation: sedimentary rock

Sandstone: sedimentary rock

The Flame Spread Index (FSI) test measures flame propagation, while the Smoke Developed Index (SDI) test assesses smoke generation. Both tests provide important measures of performance for interior finish systems in terms of fire safety.

Two important fire tests conducted on interior finish systems are the Flame Spread Index (FSI) test and the Smoke Developed Index (SDI) test.
The Flame Spread Index (FSI) test measures how quickly flames spread across the surface of a material. It involves exposing a sample of the material to a controlled flame and measuring the rate of flame spread. The FSI is derived from this test and indicates the material's ability to resist flame propagation. A lower FSI value indicates better fire resistance.
The Smoke Developed Index (SDI) test measures the amount of smoke generated by a burning material. It involves burning a sample of the material and measuring the density of smoke produced. The SDI is derived from this test and indicates the material's smoke generation potential. A lower SDI value indicates less smoke production, which is important for visibility and safe evacuation during a fire.
Both the FSI and SDI tests provide valuable information about the fire performance of interior finish systems. By evaluating flame spread and smoke generation, these tests help assess the potential fire hazard and impact on occupants during a fire emergency.

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A race car is moving at a constant speed around a track. The race car is changing its velocity as the direction of motion changes.

The primary indicator of an object's position and speed is its velocity. It is the distance that an object travels in one unit of time. The displacement of the item in one unit of time is the definition of velocity.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

As the race car is moving at a constant speed around a track, the magnitude of velocity remains same but during race it may changes its direction of motion, that is why, velocity of it, which depends on both magnitude and direction, may changes.

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The total energy of the body at evevry point is remained same due to the law of conservation of energy. Distance from A to B and final velocity of the ball just reach before C is 44.3 m/s.

d (distance) from A to B is = √2gh

In this case given are, g = 9.8 m/s² and h = 100m,

so here d = √(2⋅9.8⋅100) = 44.3m.

Final velocity ,v = √2gh

Here given are , v is the velocity, g is the acceleration due to gravity, and h is the height. In this case,

g = 9.8 m/s² ,h = 100m,

v = √(2⋅9.8⋅100)

= 44.3 m/s (final velocity)

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Answer:

c. convection currents in the asthenosphere

Explanation: