5x-2=3 -5 + 4y = 9 solve the system of equiations

Answer:

Displacement = 16.55 km

Explanation:

The straight line displacement can be found by finding the resultant of both the displacements. The displacements given to us are 15 km north and 7 km west.  Since, west and north directions are perpendicular to each other. Therefore, the displacements will also be perpendicular and they can be modelled as the rectangular components of resultant straight line displacement. So, the resultant straight line displacement can be found by using Pythagorean Theorem:

Displacement = √[(15 km)² + (7 km)²]

Displacement = 16.55 km

Hence, his straight line displacement during this part of trip will be 16.55 km

Answer:

Before coming into any conclusion, first we have to understand radiation and conduction.

Radiation is the type of mode of transmission of thermal energy in which the radiations travels through space or vacuum without heating the intervening medium.

On the other hand, conduction is the mode of transmission of heat from one body to another body which are in contact with each other or hotter part to the colder parts of a body without any transport of material particle.

Heat always flows from a body at higher temperature to a body at a lower temperature in absence of external work done. The reverse is not possible in normal case.

Heat is flowing  from hot body to cold body, and there is no direct contact between the body. It explains correctly the mode of transmission of thermal energy through the process of radiations.

Note : Please discard your other answers as they are incorrect. I have personally solved this problem and have attached the appropriate image.

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Answer:

E = K Q / R^2         electric field due to charge Q

Q = E * R^2 / K = 300 N / C * (10^5)^2 m^2 / (9.0E9 nt-m^2/C^2)

Q = 333 C

Answer:

1650 meters

145=75+a.15

Answer:

1400 m

Explanation:

Given:

v₀ = 175 m/s

v = 105 m/s

t = 10.0 s

Find: Δx

Δx = ½ (v + v₀) t

Δx = ½ (105 m/s + 175 m/s) (10.0 s)

Δx = 1400 m

Answer:

Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing. Comment on robshowsides's post “Speed is the magnitude of velocity.

Explanation:

hope it helped tee hee

Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

Answer:

D

Explanation:

Weight and friction are paired as vectors

Answer:

True

Hope it will be

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Answer:

8.57 m

Explanation:

To solve the problem, we have to decompose the two vectors along the two directions first:Vector A:- x component: Ax = +9.66 m- y compoment: Ay = 0 (the vector lies along the x-axis)Vector B:- x component: - y component: So now we can find the sum of the two vectors by adding the components along each axis:And the magnitude of the sum is given by Pythagorean theorem:

Which force is represented by the arrow at A?

Let us understand the situation first and then we will understand which type of force is represented by arrow A

The mass of the helicopter is 3402 kg.

Kinetic energy is the energy possessed by a body as a result of its motion.

The kinetic energy of a body depends on its mass and velocity as shown below:

[tex]Kinetic\:energy = \frac{1}{2}mass*velocity[/tex]

[tex]mass = \frac{2KE}{{velocity}^{2} }[/tex]

velocity = 4.00x 10^2 km/h = 111.11 m/s

kinetic energy = 2.10 x 10^7J

[tex]mass = \frac{2 \times 2.1 \times {10}^{7} }{{111.11}^{2}} = 3402 \: kg[/tex]

Therefore, the mass of the helicopter is 3402 kg.

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Answer:

Explanation:

The work done by an object can be found by using the formula

workdone = force × distance

From the question we have

workdone = 500 × 4

We have the final answer as

Hope this helps you

Answer:

Food and oxygen would eventually become major problems.

We would need HUGE banks of photocells which would be used to charge batteries (or some other energy storing system, liked pumped water)

The batteries would power banks of LED "grow lights" in greenhouses to provide us with food and oxygen.

This would have to be done on a monumental scale, largely to replace the huge quantities of oxygen generated by life in the oceans.

For a steel piano wire, 0.721 m long has a cross-sectional area of 0.00633 cm2.  is mathematically given as

de=9.624723*10^{-4}m

Generally, the equation for the Hooks law  is mathematically given as

F/A=Yde/e

Therefore

dl=fe/Ay

de=\frac{169*0.721}{0.00633*10^{-4}*2 x 10^{11} }

de=9.624723*10^{-4}

In conclusion, the wire stretch

de=9.624723*10^{-4}m

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Answer:

50N

The table is managing to keep the dog up, the dog is not moving up or down so the force that the table applies to the dog must be equal to the dogs weight - I draw this conclusion from Newton's 3rd law.

W= mg

W = 5 × 9.8

W = 49N

round to.one significant figure = 50N

The force that the table applies on the dog is required.

The force that the table applies to the dog is [tex]10\ \text{N}[/tex]

m = Mass of dog = 5 kg

g = Acceleration due to gravity is assumed to be [tex]10\ \text{m/s}^2[/tex]

Force is given by

[tex]F=mg[/tex]

[tex]\Rightarrow F=5\times 10[/tex]

[tex]\Rightarrow F=10\ \text{N}[/tex]

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The height from which the engineer needs to release the ball is :  11.811 m

Given data:

Mass of wrecking ball = 52 kg

velocity of wrecking ball ( Vf ) = 12.3 m/s

Initial velocity of ball ( Vi ) = 0 m/s

final height ( hf ) = 4.1 m

Applying the principle of energy conservation

 Initial energy = final energy

= 1/2 mV²i  + mghi =  1/2 mV²f  + mghf  ----- ( 1 )

given that Vi = 0 also cancelling out m from both sides

Equation ( 1 ) becomes

=  0   +   hi   =  V²f / 2g  + hf

therefore :  hi = ( 12.3 )² / 2 * 9.81  + 4.1

                       = 151.29 / 19.62  + 4.1

                       = 11.811 m

Hence we can conclude that The height from which the engineer needs to release the ball is :  11.811 m

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Attached below is the missing image related to your question

[tex]\bold{\huge{\underline{ Solution }}}[/tex]

Here, we have

We know that,

That is,

[tex]\bold{\red{ C = }}{\bold{\red{\dfrac{ Q}{m{\delta}T}}}}[/tex]

So,

[tex]\sf{{\delta} T = }{\sf{\dfrac{ Q}{Cm}}}[/tex]

Subsitute the required values,

[tex]\sf{ T2 - 10 = }{\sf{\dfrac{ 7700}{3{\times}4186}}}[/tex]

[tex]\sf{ T2 - 10 = }{\sf{\dfrac{ 7700}{12558}}}[/tex]

[tex]\sf{ T2 - 10 = }{\sf{\cancel{\dfrac{ 7700}{12558}}}}[/tex]

[tex]\sf{ T2 - 10 = 0.61 }[/tex]

[tex]\sf{ T2 = 0.61 + 10 }[/tex]

[tex]\bold{ T2 = 10.61 {\degree} C}[/tex]

Hence, The final temperature of 3kg if 7,700 J of heat supplied is 10.61 °C

Answer:

1. Strike one tuning fork on the edge of the table to make it vibrate.

2.  Hold the vibrating tuning fork right beside the other one.

3. The second tuning fork will begin to vibrate at the same rate as the first one.

Explanation:

hope this helps! brainliest would be great also please click thanks button!

x(t)=voₓ.t = vo cos α.t

the greater the initial speed, the further the distance obtained

The horizontal distance traveled by a projectile (also known as the range of the projectile) is determined by the initial speed of the projectile, as well as other factors such as the angle at which it is launched and the gravitational acceleration acting on it.

A projectile is an object that is projected into the air and follows a parabolic path under the influence of gravity. Examples of projectiles include balls thrown or kicked in sports, bullets fired from guns, and rocks or other objects that are thrown or dropped.

To determine the effect of the initial speed on the horizontal distance traveled by a projectile, you can use the following formula:

[tex]Range = (Initial speed)^2 * sin(2 * Launch angle) / gravitational acceleration[/tex]

This formula shows that the range of a projectile is directly proportional to the initial speed of the projectile squared, and is also affected by the launch angle and gravitational acceleration.

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Raymond Cattell created the 16pf self-inventory assessment by first taking 4,504 personality traits and removing all of the synonyms.

This is defined as a word or phrase that has a similar meaning to another word or phrase.

By removing synonyms from the personality traits, Raymond Cattell created the 16PF self-inventory assessment.

Hence Raymond Cattell created the 16pf self-inventory assessment by first taking 4,504 personality traits and removing all of the synonyms.

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Answer:

Acceleration = Final velocity - initial velocity / time take

65-35=30 , 30/5=6

Acceleration = 6m s-2

Explanation:

Answer:

P = 0.7 [kg*m/s]

Explanation:

The amount of linear momentum is defined as the product of mass by Velocity. This way you have the following equation:

P = m*v

P = momentum [kg*m/s]

m = mass = 140 [g] = 0.140 [kg]

v = velocity = 5 [m/s]

P = 0.140*5

P = 0.7 [kg*m/s]

Answer:

The answer is see the person above is correct They must lose enough other kinetic energy so that the attractions between them hold in place has been vibrate

Explanation:Got it correct

For a substance to change from a liquid to a solid, the particles must lose enough of their kinetic energy so that the attractions between them hold in place as they vibrate. Thus, the correct option is C.

Kinetic energy is the energy which an object has because of its motion. If we want to accelerate an object, then it is required to apply a certain amount of force. Applying a force requires us to perform work. After work has been done on the object, then the energy has been transferred to the object, and the object will be moving with a new constant speed and no acceleration.

For a substance to change from a liquid to a solid, the particles must lose enough of their kinetic energy so that the attractions between them hold in place as they vibrate.

Therefore, the correct option is C.

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Answer:

PE=mgh

 Where; m is the mass

              g is the gravitational force.

               h is the height.  

   the mass is 1kg, the acceleration due to gravity has a constant value of 10ms² . And the height is 3m.

mgh= 1 x 10 x 3 = 30Joules

Answer:

21.5 i did the assesment

Explanation:

Answer:

Wave speed is related to wavelength, frequency, and period by the equation wave speed = frequency x wavelength.

Explanation:

I hope my answer helped <3 Have a nice day

The equation for the speed of the wave is v = λ × f. The speed of a wave depends on wavelength and frequency.

The rate at which a wave moves across a medium is referred to as its speed. It displays the speed at which the wave's disruption or energy spreads. The characteristics of the medium a wave travels through affect its speed.

The equation for the wave's speed (v) for a mechanical wave, such as one moving via a string or a spring, is as follows:

v = λ × f

Here:

v = speed of the wave

λ  = wavelength of the wave

f = frequency of the wave

Hence, the equation for the speed of the wave is v = λ × f. The speed of a wave depends on wavelength and frequency.

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