A car is traveling driving at 80 km/h when the driver sees an accident 50 meters ahead and applies the brakes. What constant deceleration is required to stop the car in time to avoid hitting the vehicles ahead? express your answer in m/s2.

At constant temperature pressure is inversely proportional to volume, so pressure will increase.

To know more about pressure visit:

https://brainly.com/question/5018408

#SPJ13

Answer:

Energy

Explanation:

Some of the suns energy is converted into wind and water waves

Answer:

1. If the knot is in equilibrium - no net force acts on the knot.

2. F1x = 0                 F1y = -F1

   F2x = -F2 cos θ1        F2y = F2 sin θ1

    F3x = F3 cos θ2        F3 = sin θ2

3.    Fx net = 0        

       Fy net = 0          for equilibrium to occur

4. F2 cos θ1 = F3 cos θ2

   F1 = M g = 2.1 * 9.8 = 20.6 N

    F2 sin 30 + F3 sin 60 = 20.6      balancing forces in y-direction

or   .5 F2 + .866 F3 = 20.6       (use this equation below )   (I)

    F2 cos 30 = F3 cos 60       as stated above

    .866 F2 = .5 F3        or F3 = 1.732 F2        substituting for θ

    .5 F2 + .866 (1.732 F2) = 20.6       using (I) above

   2.0 F2 = 20.6       and

     F2 = 10.3 N

    F3 = 1.732 * 10.3 = 17.8 N

Check:

    10.3 * .866 = .5 * 17.8        using values above

     8.92 = 8.9       forces balance

Also    .5 * 10.3 + .866 (1.732 * 10.3) = 20.6

option c A gun is fired horizontally from a tower with a muzzle velocity of 100 m/s. The bullet will arrive 100m away and arrive 1 second late if air resistance is ignored.

That is not to argue that there isn't a velocity increase. It absolutely depends on the specific firearm, cartridge, and loading in question. The reason for an increase in velocity is that the pressures are slightly higher, which causes the bullet to move less before engaging the rifling.

However, a significant improvement in accuracy is what many handloads will discover. A smaller distance to the rifling reduces the possibility of any bullet tipping and the variation in breech pressures that exists between different rounds. From round to round, slightly variable pressures can and will be produced even with equal powder loads, down to less than 1/10th of a grain. It's a simple reality.

Learn more about velocity here:

https://brainly.com/question/28738284

#SPJ4

The red light is the least refracted by the prism.

Each beam of light with a particular wavelength is slowed differently by the glass. Since violet light has a shorter prism wavelength, it is brake more than the longer wavelengths of red light. accordingly, violet light is bent the most while red light is bent prism the least. Prism on dispersion, the light rays with longer wavelengths bend less than ones with shorter wavelengths. Since red has the longest wavelength, it bends the least. prism Among the 7 constituent colors of light, violet light has the least wavelength and hence it deviates the most, and red light having the largest wavelength deviates the least. Hence, prism the required order is violet, indigo, blue, green, yellow, orange, and red.

So we can conclude that in a prism, the red light is less refracted.

Learn more about prism here: https://brainly.com/question/23963432

#SPJ1

The theory is that:

H0: The amount of salt added to ice has no bearing on how quickly it melts.

H1: The amount of salt added to ice will have an impact on how quickly it melts.

By altering the rate at which salt is introduced to the equation, the independent variable can be modified.

The ice, which is the dependent variable, will alter or melt in response because it will get smaller as the rate at which salt is injected rises.

The boiling point of water, or the temperature at which it may erupt, rises when salt is added to it. For every 58 grams of dissolved salt per kilogram of water, the temperature required to reach boiling rises by around 0.5 C. This is an illustration of an elevated boiling point, which is not just a property of water.

Learn more about hypothesis :

https://brainly.com/question/606806

#SPJ4

Fraction of the initial kinetic energy is lost in the collision f = 3/4.

Two balls of masses M and 3M kinetic energy

Initially before collision:

Speed of ball of mass M = −V0 (Right direction is taken as negative)

Speed of ball of mass 3M = +V0

Finally after collision: Speed of ball of mass M = v

Speed of ball of mass 3M = V02

[tex]Finding the fraction(f) of initial kinetic energy lost in the collisionf=1−Final Kinetic EnergyInitial Kinetic Energyf=1−12×M×(v02)2+12×3M×(v02)212×M×(−v0)2+12×3M×(v0)2f=1−v024v02f=1−14=34[/tex]

Learn more about kinetic energy here:

https://brainly.com/question/999862

#SPJ4

We can calculated the maximum power as follows:

Since the heater consumes 1600W, we can write the following inequality:

Where n is the number of heaters, so:

Answer:

2 heaters

The weight of the body on the surface of mars would be 333.9 Newtons.

Weight is the force exerted by the earth on an object at the surface of the earth and this force is directed towards the center of the earth. Mathematically -

W = mg

where -

[m] is the mass of object

[g] is acceleration due to gravity

Given is a body that weighs 900N on the surface of earth. Mars is a planet whose mass is one ninth and radius is one half that of the earth. The same body is now placed on mars.

Since the weight of the body is 900 N on earth, we can write -

W = mg

900 = m x 10

m = 900/10

m = 90 Kg

Now, we know for a body of mass [m] on a planet of mass [M], the gravitational force exerted by planet on the body will be -

F = GMm/r²

but

F = W = mg

So, we can write -

mg = GMm/r²

g = GM/r²

For the planet of mars, we can write -

g = GM[mars]/r[mars]²

g = (6.6743 × 10⁻¹¹ x 0.65 x 10²⁴)/(3185.5 x 10³)

g = 3.71 m/s²

So, the weight of the body on mars will be -

W = mg = 90 x 3.71

W = 333.9 N

Therefore, the weight of the body on the surface of mars would be 333.9 Newtons.

To solve more questions on Mass and weight, visit the link below-

brainly.com/question/13429205

#SPJ1

A ball is released from a certain height of 20m then the time taken by the ball to fall is 2 sec and the velocity is 20m/s

Here: s (height) = h =20

a=g=±10m/s

a=10m/s (since it is dropped)

[tex]v^{2} -u^{2} =2as\\v^{2} =2*10*10\\v^{2}= 200[/tex]

(u=0; it is dropped not thrown)

v=20m/s

for calculating time we know,

v=u+at

20= 0+ 10xt

t=20/10

t=2seconds

Learn more about velocity visit: https://brainly.com/question/25749514

#SPJ4

The magnitude of the magnetic torque on the coil is 9.435 Nm.

A magnetic field exerts a torque that tries to align the normal vector of a loop of current with the magnetic subject. the size of the torque on a loop

The magnetic torque, τ, skilled by using a unmarried particle of quantity V and domain magnetization Md whose moment is oriented at attitude θ to carried out induction B is given by means of τ=mHsinθ where m=MdV is the magnetic second of the particle.

This is the torque on a modern-wearing loop in a uniform magnetic field. This equation can be proven to be valid for a loop of any form. The loop includes a modern I, has N turns, every of area A and the perpendicular to the loop makes an angle θ with the field B.

Calculation:-

τ = μ×B

 = I A B sin90°

 = 4.38 × 3.14×(0.77)²×  1.157

 = 9.435 N m.

Learn more about magnetic torque here:-https://brainly.com/question/6585693

#SPJ4

The cycling of matter in Earth’s atmosphere is related to the movement of dust from the Sahara desert to the Amazon because the biosphere is a major ecosystem that connects all ecosystems around the world.

The ecosystems are specific geographic regions in which biotic factors (life) and abiotic factors (e.g. dust) interrelate to shape the environmental condition of the area, while the term biosphere makes reference to a major ecosystem that connects all these region in the world.

Therefore, we can conclude that ecosystems are interconnected to shape the biosphere, thereby the phenomena that occur in Sahara desert are able to modify the conditions in a Forest like Amazon.

Learn more about ecosystems and biosphere here:

https://brainly.com/question/605396

#SPJ1

A Car is travelling at a speed of 60 km/h and then  accelerates to the velocity 85 km/h than acceleration in 5 sec is given by 18000 km/h² .

Acceleration of body is defined as rate of change of the velocity with respect to the time. Acceleration is a vector quantity it have magnitude as well as direction.

Acceleration =  (final velocity - initial velocity )/ time

Acceleration =  change in velocity / change in time

Given that in the question that the velocity changes from 60 km/h to 85 km/h in 5 sec =( 0.00138 h ) then the acceleration of the car is given as,

Acceleration of the car  = (60 - 85)/0.00138

Acceleration of the car  = 18000 km/h²

Acceleration of the car travelling with the velocity 60 km/h to final the velocity 85 km/h in time 5 sec is given by 18000 km/h².

To learn more about the acceleration refer to the link brainly.com/question/12550364

#SPJ1

The charge of 15 Chas been flowing through a circuit with current of 2 A for a time period of 7.5 s

Q = I t

Q = Electric charge

I = Electric Current

t = Time

Q = 15 C

I = 2 A

t = Q / I

t = 15 / 2

t = 7.5 s

Electric current is the rate of flow of charge. In a circuit the current always flows from the negative terminal to the positive terminal. Its unit is Ampere ( A ) which is C / s.

To know more about Electric current

https://brainly.com/question/2264542

#SPJ1

The 50 N force applied at an angle to the crate may be broken down into horizontal and vertical force components. As the angle created by the rope, e, increases from 0° to 90°, the horizontal component, Fx, drops and the vertical force component, Fy, increases.

The components of a force are the force parts acting in perpendicular directions, horizontal and vertical, that combine to give the specified force.

The direction the crate is sliding = The horizontal, x-direction

The force exerted by the man = 50 N

The angle of the rope

The components of the force are therefore:

Horizontal component, Fx = 50 × cos(8)

Vertical component, F₁ = 50 x sin(0)

The value of cos(e) and sin(e) as the angle the rope makes with the horizontal,

e, increases from 0° to 90° are as follows:

Therefore, the horizontal component of the force exerted by the man, Fx has a maximum value at = 0, and decreases to 0, as increases from 0° to 90°.

The vertical component of the force exerted, Fy, has a minimum value of O at → = 0°, and the value of sin(e) and therefore Fy, increases to a maximum of (sin(90°) 1) 50 N as increases to 90°.

Please find attached the graph showing the components of the force, Fx, and Fy, exerted by the man as the angle formed by the rope increases from 0° to 90°

Learn more Resolution of force here:

https://brainly.in/question/31565885

#SPJ4

1year is the orbital period of this planet.

The orbital period  is the quantity of time a given astronomical object takes to complete one orbit around every other object. In astronomy, it generally applies to planets or asteroids orbiting the solar, moons orbiting planets, exoplanets orbiting different stars, or binary stars.

Kepler's third law - indicates the relationship among the length of an items orbit and the common distance that it's far from the issue it orbits. this could be used  for something clearly orbiting round another factor.

Entire revolution is known as the orbital duration. At 200 km that is approximately ninety minutes. The orbital duration will increase with altitude for two motives. First, as the altitude increases, Earth's gravity decreases, so the orbital speed had to stability it decreases.

Learn more about orbital period here:- https://brainly.com/question/27063414

#SPJ1

With low-frequency stimulation, the muscle relaxes fully between contractions, resulting in identical twitches twitches per stimulus.

Alpha motor neurons are the motor neurons that innervate the fibers of the skeletal muscle. A number of branches, each innervating a different muscle fiber, are formed as the alpha motor neuron enters the muscle. A motor unit is made up of one alpha motor neuron and all of the muscle fibers it innervates. Small motor units with 3-5 muscle fibers per motor neuron are found in muscles that are involved in delicate, coordinated control. Our hand and eye muscles, as well as those that control eye movement, have very small motor units.

learn more about contractions here :

https://brainly.com/question/984979

#SPJ4

The power dissipated by the resistor is 3000W.

Electrical power, or (P), in a circuit is a unit of measurement for the rate at which energy is consumed or produced inside a circuit. The energy produced or delivered by an energy source, such as a voltage, is absorbed by the associated load.

In physics, power is referred to as the rate of energy conversion or transfer over time. The unit of power in the SI system, often known as the International System of Units, is the Watt (W). A single joule per second is one watt. Power was formerly referred to as activity in some research. A scalar quantity is power.

The resistor's power dissipation can be computed as P = I²R

here ,

I = 2 A

R =  750

Therefore P= 2² x 750 W

= 3000W

To learn more about electrical power click on the link below:

https://brainly.com/question/13080026

#SPJ9

To travel at 230 m/s at an altitude where the air density is 1.0 kg/m3, the jet's engines must deliver 111kN of thrust.

Air Density is defined as the mass of an object, including air, divided by its volume.

Scientists measure density in terms of kilogrammes per cubic metre when using the metric system.

The density of the air is influenced by its temperature, pressure, and water vapour content. We'll discuss dry air initially, so just temperature and pressure will be a concern.

In addition to a fundamental explanation of air density, we will go into how humans are affected by decreased air density, such as that experienced at high altitudes, how humidity influences air density in unexpected ways, and how air density affects things like aircraft, baseballs, and even racing automobiles.

The density of the air in a free environment drops as temperature increases.

Learn more about air density here:

https://brainly.com/question/3551743

#SPJ4

The mass of the other skater who is pushed is 51.4 kilograms.

According to the law of conservation of momentum,

The total linear momentum is always conserved in a system if no external force is applied.

So. we can write,

Initial momentum = final momentum

Initial momentum is zero as both the skater are at rest.

So, Final momentum should be 0,

Final momentum = 0

M₁V₁ + M₂V₂ = 0

M₁ is the mass of first skater,

V₁ is the final speed of the first skater,

M₂ is the mass of the second skater,

V₂ is the final speed of the second skater, V₂ will taken as negative because the second skater is pushed into opposite direction,

Putting all the values,

61(0.75) = -M₂(-0.89)

M₂ = 51.4 Kg.

So, the mass of the skater is 51.4 kg.

To know more about Linear momentum, visit,

https://brainly.com/question/7538238

#SPJ4

Answer:

See below

Explanation:

x component =  90 cos 45 = 63.6 N

y component =  90 sin 45  = 63.6 N

The coefficients of the variables in each equation can be arranged in a row to create the coefficient matrix. A constant term should always be written on the right in standard form for each equation.

A coefficient matrix, a variable matrix, and a constant matrix can all be used to describe a system of linear equations in matrix form.

Think about the system,

2x+3y=8

5x−y=−2

X and Y are the variables that we have. As a result, the variable matrix can be written as [xy].

The constant terms from the equations, 8 and 2, are on the right side of the equivalence. The first and second rows of the constant matrix are occupied by the two integers in that order since they are the ones that correspond to the first and second equations. The matrix then takes the form [82].

The system is now represented by the equation [2531] [xy] = [82].

Now, the system is denoted as [2531] [xy]=[82].

You can see that the matrix representation is identical to the system of equations using matrix multiplication.

To know more about matrix click on the link:

https://brainly.com/question/11348768

#SPJ4

a. The magnitude of the force exerted on the electron F = 3.64*10^-18N

b. The force F is 4.08*10^11 times the weight of the electron

a. In order to calculate the magnitude of the force exerted on the electron you first calculate the acceleration of the electron, by using the following formula:

v: final speed of the electron = 7.00*10^5 m/s

vo: initial speed of the electron = 3.00*10^5 m/s

a: acceleration of the electron = ?

x: distance traveled by the electron with certain speed= 5.0cm = 0.05m

you solve the equation (2) for a and replace the values of the parameters:

[tex]a=v^{2} - V^{2} /2x[/tex]

a=4×10^12 m/s²

to calculate the force we now use the second Newton law :

F=ma

m: mass of the electron = 9.11*10^-31kg

F=3.64*10^-18N

The magnitude of the force exerted on the electron is 3.64*10^-18N

b. given weight of  electron is :

Fg=mg

Fg = 8.92*10^-30N

The Division between the force electron and the weight of the electron F is:

F/Fg=4.08*10^11

The force F is 4.08*10^11 times the weight of the electron

Learn more about force here:

https://brainly.com/question/13191643

#SPJ4

The change in velocity experience by a driver, driving a Bugatti Veyron, accelerating at 26.7 m/s² for 2.4 seconds is 64.08 m/s.

Change in velocity is the difference between the final and the initial velocity of a body.

To calculate the change in velocity experienced by the driver, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values above into equation 1

Hence, the change in velocity experienced by the driver is 64.08 m/s.

Learn more about change in velocity here:https://brainly.com/question/26246534

#SPJ1

The gravitational acceleration on the surface of the exoplanet is 0.188 m/s².

Gravitational acceleration has an important role in uniform motion. Uniform motion is an object's motion under acceleration. It should follow the rule

vt = vo + a . t

vt² = vo² + 2a . s

s = vo . t + 1/2 . a . t²

where vt is final velocity, vo is initial velocity, a is acceleration (gravitational acceleration), t is time and s is displacement.

From the question above, we know that

h = 18 m

vo = 2.6 m/s

In this case, the final velocity should be zero. Hence,

vt² = vo² + 2a . s

vt² = vo² - 2g . h

0² = 2.6² - 2.g . 18

36g = 6.76

g = 0.188 m/s²

Find more on gravitational acceleration at: https://brainly.com/question/19050897

#SPJ4

The important Physics chapter "Conductors and Dielectrics in an Electric Field" focuses on the electric field and its interactions with different kinds of materials, such as conductors and dielectrics.

The significance of its components in the electrical circuit is explained in Conductors and Dielectrics in an Electric Field. is a crucial resource component that all students require in order to succeed in the Class 12 Physics exams and admission exams. It is one of the greatest ways to prepare for physics exams and practice problems in order to get good marks. Here, the questions are primarily centered on electric field, current, speed, voltage, and other related concepts.

In-depth explanations are provided for the behavior of conductors and dielectrics. The issues help to strengthen the applicability of the theoretical ideas in daily life and activities.

For clear knowledge and a firm grasp of the syllabus and concept, students aiming for a good mark in a competitive examination must solve every issue provided.

Based on each and every formula, equation, and procedure, there are a variety of difficulties that can be accessed. Each problem's solution is broken down into logical steps and supported with relevant data, formulas, graphs, and equations. All questions based on conductors and dielectrics are readily available to students. This aids in conceptual clarity and full knowledge for kids.

To know more about conductors click on the link:

https://brainly.com/question/8426444

#SPJ4

Answer:

Option 2

Explanation:

This is the definition of the plum-pudding model.

Any bridge is subject to three different types of forces: the dead load, the live load, and the dynamic load. The weight of the bridge itself is discussed in the first of these words.

Any of the four fundamental forces in physics—gravitational, electromagnetic, strong, and weak—that control how objects or particles interact as well as how some particles decay—is referred to as a fundamental force, also known as a fundamental interaction.

Compression and tension are the two main forces that are ever-present on a bridge. A force that compresses or shortens the object it is acting on is known as a compressive force. A force known as tension or tensile force works to stretch or expand the object it is acting on.

To know more about Force visit:

https://brainly.com/question/13191643

#SPJ13

The environmental impact of the changes in the amount of energy resources is reduction in air pollution.

Energy resources are the materials that can act as sources of energy which is grouped into two namely:

From the given figures,

In 2014 renewable energy = 19%; while in 2015 it is = 25%

In 2014 non renewable energy when added = 79%; while in 2015 it is = 73%

This shows that there was reduction in the use of non renewable energy from 2014 to 2015 by 6%.

This would affect the environment positively as there would be reduction in air pollution caused by non renewable energy resources.

Learn more about energy resources here:

https://brainly.com/question/26289235

#SPJ1

The magnitude of the total velocity of the package at the moment it is thrown as seen by an observer on the ground is D = 193m/s  15.2s = 2934 m.

What is velocity ?

velocity is the prime indicator of the position as well as the rapidity of the object

Sol-

1. 0.5gt^2 = 2010 m.

4.9t^2 = 2010.

t = 20.3 s. = Fall time.

D = Xot. = 193m/s 20.3s = 3909 m.

2. V=sqrt(Xo^2+Yo^2)=sqrt(193^2+58^2) = 202 m/s.

3. Vot + 0.5gt^2 = 2010 m.

58t + 4.9t^2 = 2010.

4.9t^2 + 58t - 2010 = 0.

Use the  quadratic formula we are get  

t = 15.2 s. = Fall time

D = 193m/s  15.2s = 2934 m.

D = 193m/s  15.2s = 2934 m.

To know more about velocity click-

https://brainly.com/question/25749514

#SPJ9