a car is traveling 21 m/s when the driver sees a child standing in the road. he takes 0.8s to react then steps on the breaks and slows at 7.5m/s^2. how far does the car go before it stops?

Answer:

''The combination of Earth's tilted axis and its revolution causes the atmosphere to be unequally heated by the sun.'' - jordanmiya23

Explanation:

this has been answered before

A recreational flyer does not need an airspace authorization in uncontrolled airspace.

An airspace in which the Air Traffic Control service is not considered necessary is called uncontrolled airspace.

In general, an uncontrolled airspace remains at 400 or under 400 levels surpassing the ground.

Moreover, in an uncontrolled airspace the recreational flyer does not need any prior authorization and should also have particular knowledge about the airport traffic patterns

To put it simply, the remote pilots and flyers are not allowed to use landing and take off areas in an uncontrolled airspace.

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The calculated energy is 200000 J. An item in motion has energy, which is called kinetic energy.

Motion in space you walk down the street, and the rotation of the planet around the sun are all examples of kinetic energy. is inversely proportional to the square of the object's velocity and its mass: K.E. = 1/2 m v2. Motion is created by kinetic energy. Any moving item uses kinetic energy, such as a person walking, a baseball being thrown, a piece of food falling from a table, or a charged particle in an electric field.

Energy Kinetic =.5 (m.v.v)

In this issue,

mass (m) = 1000 kg

The speed is 20 m/s.

So,

0.5 (1000 20 20 20) = 200000 J is the total kinetic energy.

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An airplane is flying in a horizontal circle at a speed of 105 m/s. 179.2 m is the minimum radius of the plane's.

Centripetal acceleration is defined as the property of the motion of an object, traversing a circular path. Any object that is moving in a circle and has an acceleration vector pointed towards the center of that circle is known as Centripetal acceleration.

The force causing this acceleration is directed also toward the centre of the circle and is named centripetal force

Centripital acceleration = velocity² ÷ radius of the circle

According to the question:

  centripital acc ≤ 6.27g

   velocity² ÷ radius of the circle ≤ 6.27g

v²÷ R = 6.27× 9.81

= 61.5

Radius of the planes path = V²÷61.50

                                          = {105×105}/61.50

                                         = 179.2 m

Radius of the planes path = 179.2 m

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Based on the current understanding of this operon, James might find it useful to test the idea that adding all lactose to the media for bacterial growth will hasten the rate at which the bacteria break down lactose. So, choosing one is the right one.

When expressed, the lac operon is a group of genes that creates the machinery for lactose metabolism. However, it chooses to use glucose as its sugar by metabolizing it. As a result, the cell does not need to develop this machinery while glucose is accessible because it won't use it. Instead, it will metabolize the glucose. However, the E. coli must be able to absorb this lactose when we add it in place of glucose, or else it won't be able to develop using the added energy source. So, we have a few different circumstances. We do not want to express the lac operon when glucose but not lactose is present. We do want to express the lac operon when glucose is removed and lactose is added, though.

Thus, we can conclude that adding allolactose to the bacterial growth medium should speed up how quickly the bacteria break down lactose.

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Answer: Its A  Addition of allolactose (inducer) to the bacterial growth media should increase the speed at which the bacteria metabolize the sugar lactose.

Explanation: yes

The work done by the student in moving the desk of mass 80 kg is 1,216J

The mass of the desk = 80 kg

The distance of the desk moved by the student = 4 meter

The coefficient of kinetic friction = 0.4

The work done by the student can be found using the formula,

                 W = F x d

where W is the work done by the student

           F is the frictional force

           d is the distance moved

Let us find the frictional force first

                     F = μmg cosθ

where μ is the coefficient of friction

           m is the mass of the object

                     F = 0.4 x 80 x 9.8 x cos 0

                        = 304 N

Then, the work done is

                      W = 304 x 4

                          = 1,216 J

Therefore, the work done is 1,216 J

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Using the theories of voltage, we got that ratio of N₂ / N₁ become 13.3 if we connect the galvanometer to the primary coil and the battery/switch to the secondary.

A transformer is the device that changes the voltage in the primary, causing a voltage to be induced in the secondary. The expression for this voltage ratio is given by

ΔV₂ = N₂ /N₁ ΔV₁

where N is the number of windings on each side of the coil and V2 and V1 are the voltages in the secondary and primary coil, respectively.

According to question  the primary voltage in this instance is 9.0 V and the secondary voltage is 120 V.

ΔV₂ /ΔV₁ = N₂ / N₁

N₂ / N₁ = 120/9

N₂ / N₁ = 13.3

Hence, if we connect the galvanometer to the primary coil and the battery/switch to the secondary, then the ratio of N₂ / N₁ become 13.3

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(Complete question) is:

A 9.0-V battery (with nonzero resistance) and switch are connected in series across the primary coil of a transformer. The secondary coil is connected to a light bulb that operates on the 120 V. a)Determine the ratio of the secondary to primary turns needed for the bell's transformer. b)Determine the ratio of the secondary to primary turns needed for the bells transformer. Ns/Np=?c), In final part how would the effects differ if you connected the galvanometer to the primary coil and the battery/switch to the secondary? write out your answer in a clear and well supported paragraph.

The distance covered by karen is 18 meter and the displacement is 6 meters.

What is the difference between distance and displacement?

Distance : The path between any two points which is completely covered, length of such path is known as distance.

It is denoted by d.

There is no need of direction for calculating a distance.

It is a scalar quantity.

Displacement: the minimum path covered between any two points and is a direct length, such length is known as displacement.

It is denoted by s.

The direction is taken into consideration for calculating displacement.

It is a vector quantity.

As karen starts from a line, runs 2.0 m, returns to the line, runs 4.0 m, returns to the line, and runs 6.0 m. so her total distance = 2+2+4+4+6= 18 m

We added 2 and 4 two times because he started and returned to the same line.

Displacement= 6m as her final displacement – initial displacement= 6-0=6m

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Yes, the objects with the same velocity and mass experience more force when stopping or when changing direction.

Heavier objects that have more mass are more difficult to move and stop as compared to other objects. Heavier objects have greater mass and resist more change as compared to lighter objects. For example, Pushing a bicycle or stopping them once moving. The objects having more mass, it is harder to start or stop.

The momentum of a moving object increases with the increase of mass and its speed. The heavier object moves faster and has greater momentum and it the harder to stop it. For example, if a truck and a car are traveling at the same speed, more force is needed to stop the truck because its greater mass provides more momentum.

So we can conclude that the bodies with the same velocity experience more force while stopping.

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Answer:

820 feet

Explanation:

.25 km = 820 feet

The sphere energy decreases as the distance from the source increases.

A magnetic field is a vector subject that describes the magnetic effect on transferring electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field story a force perpendicular to its very own pace and to the magnetic discipline.

The magnetic area is a area around a magnetic cloth or a moving electric powered rate inside which the pressure of magnetism acts. A magnetic subject is a force discipline that is created via transferring electric prices and magnetic dipoles and exerts a pressure on different close by shifting prices and magnetic dipoles.

Magnetic fild, a vector area  of a magnet, electric current, or converting electric discipline, wherein magnetic forces are observable.

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Carol Bill had a stronger lift than Bob (1400 N x 2.0 m / 2.0 s = 1400 W vs. 1000 N x 1.5 m / 1.0 s (= 1500 W).

The All-America Football Association (AAFC) team from Buffalo that bore the same moniker as the western frontiersman Buffalo Bill is whence the Bills got their name. The Bills have been the only NFL club that holds home games in Western New York and draw a sizable portion of their fan base from there.

William's short form (hypocorism), Bill, is a male given name that is typically used for boys. It can also be used as an English translation of the common Greek name Vasilis and Vasileios (Basil), particularly among Greek immigrants in Language nations, perhaps as a result of the similarity in pronunciation.

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646 N  is the strength of the gravitational force on the satellite

F=GmM/r²

satellite mass= 718 kg

mass of triton=1.35x10*23 kg

r= 352500m

F=GmM/r²

F=6.67×10^-11×718 kg×1.35x10*23 kg ÷(352500m)²

F=646 N

The gravitational subject has course, much as other electromagnetic fields just like the electric powered and magnetic fields. it's far a vector subject as a end result. The gravitational discipline power, which has the unit Newtons consistent with kilogram, is used to degree the gravitational discipline. This area force has a endless range and is constantly attracting.

The electromagnetic area, or the electrical and magnetic fields for charged debris and magnets, is comparable to the gravitational discipline. due to the fact electromagnetic discipline forces are stronger than gravitational field forces, they take priority over them.

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The frequency of oscillations is f = 7 Hz.

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1.55 x 10⁻⁶ F is the capacitance if both slices of dielectric material are placed between the plates.

An indicator of a substance or material's capacity to store electrical energy is its dielectric constant. It is a measurement of how much an object can hold or concentrate an electric flux. Dielectric constant is defined mathematically as the ratio of a material's permittivity to the permittivity of free space.

For one slice, we have

thickness, d₁ = 0.0025 x 10⁻³ m

dielectric constant, k₁ = 6.2

breakdown field strength, E₁ = 7.15 x 10⁶ V/m

For second slice, we have

thickness, d₂ = 0.0085 x 10⁻³ m

dielectric constant, k₂ = 10.7

breakdown field strength, E₂ = 3.15 x 10⁶ V/m

(a) The capacitance of each possible choice which is given as :

For one slice ; C₁ = k₁o A/d₁ = (6.2) (8.85 x 10⁻¹² C²/Nm²) (0.047 m²) / (0.0025 x 10⁻³ m)

C₁ = 1031.5 x 10⁹ F

C₁ = 1.03 x 10⁻⁶ F

For second slice; C₂ = k₂0 A / d₂ = (10.7) (8.85 x 10-12 C²/Nm²) (0.047 m²) / (0.0085 x 10⁻³m)

C₂ = 523.6 x 10⁻⁹ F

C₂ = 5.23 x 10⁻⁷ F

{one slice will have a greater capacitance than second slice }

(b) The maximum working voltage for each capacitor is given as :

For one slice; E₁ = V₁ /d₁⇒ (7.15 x 10⁶ V/m) = V₁ / (0.0025 x 10⁻³ m)

V₁ = 17.8 V

For second slice; E₂ = V₂/d₂ (3.15 x 10⁶ V/m) = V₂ / (0.0085 x 10⁻³ m)

V₂ = 26.7 V

If both slices of dielectric material are placed b/w the plates, then the capacitance will be

given as:

Ctotal = C₁ + C₂ = [(1.03 x 10⁶ F) + (5.23 x 10⁻⁷ F)]

Ctotal = 1.55 x 10⁻⁷ F

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The average temperature over the past 1000 years has been about 15∘c, from the graphs, you can conclude that the earth's average temperature during the past 800,000 years has varied between about 7∘C and 19∘C.

The earth’s average temperature record illustrates the variations in ocean and atmosphere temperatures throughout a range of historical periods. Since the end of the Pleistocene glacier, many estimations of temperature have been made, especially for the current Holocene epoch. Geologic data that dates back millions of years provides some temperature information. Ice core data, which is more recent, covers the time from 800,000 years ago to the present.

Paleoclimate research spans the time from 12,000 years ago to the present. The global temperature from 1,000–2,000 years ago till the present can be determined through observations taken from ice cores and tree rings. The most thorough records date back to 1850 when meticulous thermometer-based recordings first started.

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Answer:

N/A

Explanation:

Please word this better.

Answer:4.0

Explanation:

I got it wrong and it said this was the answer

The strength of the magnetic field required, applied perpendicular to the direction of the beam, that will deflect the beam of electrons into a circular arc with radius of 3.23 mm is 0.157 x 10^-3 T.

Explain the motion of electrons in a uniform magnetic field.

​Because magnetic force is always perpendicular to velocity, the charged particle is not affected by it. The kinetic energy and speed of the particle stay unchanged as a result. Motion's speed is unaffected, only its direction. Uniform circular motion frequently looks like this. The most straightforward scenario is when a charged particle moves perpendicular to a constant B-field. (If this happens in a vacuum, the magnetic field is what mostly controls the motion.) Here, the centripetal force is provided by the magnetic force (Lorentz force).

Cyclotron resonance is the word used to describe a particle moving in a circular pattern as a result of a constant magnetic field.

Equating the centripetal force and magnetic force we get,

r= mv/qB

we find

B= mv/er

where m is the mass of electrons

           e is the charge of electrons

B = (9.11×10 ^−31 kg)(89200 m/s)/ (1.60×10 ^−19  C)( 3.23 x 10^-3 m)

  = 157239.164 x 10^-9

  = 0.157 x 10^-3 T

Hence, the strength of the magnetic field required to deflect the beam of electrons is 0.157 x 10^-3 T

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The force produced by the weight as it stretches the spring from 0.3 m to 0.4 m is 1.5 N

F = k x

F = Force

k = Stiffness

x = Displacement

x1 = 0.3 m

x2 = 0.4 m

x = x2 - x1

x = 0.4 - 0.3

x = 0.1 m

k = 15 N / m

F = 15 * 0.1

F = 1.5 N

Therefore, the force produced by the weight is 1.5 N

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In order for the earth to be at rest in the center of the system of the sun, planets, and planets, and comets, there is required both universal gravity and another force in addiction that acts on all bodies equally meaning Gravitational force.

Newton's law of universal gravitation states that every object attracts every other object with a force.

That is exactly the form of the gravitational force, with the generic gravitational regular G as the regular of proportionality. consequently, Newton's legal guidelines of motion, with a gravitational force used within the second regulation, imply Kepler's legal guidelines, and the planets obey the equal laws of movement as objects at the surface of the Earth.

The pressure of gravity, or gravitational force, pulls items with mass in the direction of each other. We often consider the force of gravity from Earth. This pressure is what keeps your frame on the floor. however, any object with mass exerts a gravitational force on all different items with mass.

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The wavelength of the laser light is 514nm.

The principal maxima are defined by

d sin∅ = mλ (m=0,1,2.3...)

For m = 1, λ = d sin Φ

The angle and first order (m=1) maxima are located here between the center (m=0),.

The information provided regarding the distance between maxima and the grating-to-screen distance can be used to calculate the value of:

Tan Ф = 0.5m/1.76 m = 0.284

Therefore, Ф = 15.8° and sin Ф = 0.273

The inverse of the number of grating lines per centimeter is used to determine how far apart grating "slits" are.

d = 1/5735cm⁻¹ = 1.88×10⁻⁴cm = 1.88×10³ nm

What is wavelength?

A waveform output that is carried in space or down a wire has a wavelength, which is the separation between two equal places (adjacent crests) in the consecutive cycles.

The wavelength is λ = d sinФ = (1.88 ×10³nm) (0.273) = 514nm

Therefore, the wavelength of the laser light is 514nm.

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The wavelength of the laser light is 514nm.

What is wavelength?

A waveform output that is carried in space or down a wire has a wavelength, which is the separation between two equal places (adjacent crests) in the consecutive cycles.

The principal maxima are defined by

d sin∅ = mλ (m=0,1,2.3...)

For m = 1, λ = d sin Φ

The angle and first order (m=1) maxima are located here between the center (m=0),.

The information provided regarding the distance between maxima and the grating-to-screen distance can be used to calculate the value of:

Tan Ф = 0.5m/1.76 m = 0.284

Therefore, Ф = 15.8° and sin Ф = 0.273

The inverse of the number of grating lines per centimeter is used to determine how far apart grating "slits" are.

d = 1/5735cm⁻¹ = 1.88×10⁻⁴cm = 1.88×10³ nm

The wavelength is λ = d sinФ = (1.88 ×10³nm) (0.273) = 514nm

Therefore, the wavelength of the laser light is 514nm.

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A related right-hand rule relates the rotational direction to the torque direction. Your fingers will curl in the rotational direction if you point your thumb in the direction of the torque.

Positive torques cause counterclockwise rotation while negative torques cause clockwise rotation. Because T1 is smaller than T2, the net torque would point in a clockwise direction. The system would start to accelerate clockwise if it were initially at rest. The torques in Example 2 are not in equilibrium because there is a net torque. The rotational equivalent of force is torque. So an object will rotate with an angular acceleration in response to a net torque.

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Answer:

Explanation: The density of gas differentiates all the varieties of gas present in the atmosphere.

HYDROGEN- it is a lighter gas having a lesser density.

For example, a hydrogen balloon displaces the air around it thus making it rise.

CARBON DIOXIDE: It is a denser gas as it makes the balloon heavier than the air pressure around it thus making it sink.

I hope the explanation was helpful. :)

As the text cites, atoms are incredibly tiny, numerous, perpetually moving, and Ageless.

An atom consists of a nucleus and one or extra electrons bound to the nucleus. The nucleus is made from one or more protons and a number of neutrons. best the maximum common form of hydrogen has no neutrons. An atom is the smallest unit of everyday relied on that forms a chemical element.

An atom is a particle of being counted that uniquely defines a chemical element. An atom consists of an important nucleus that is surrounded by means of one or extra negatively charged electrons. The nucleus is undoubtedly charged and incorporates one or extra particularly heavy particles called protons and neutrons.

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Answer: 1.42 sec

Explanation:

The object is dropped from the height. So initial velocity, u = 0 m/s.

Height = 10m and Acceleration = g = 9.8 m/s² (or g can be approximated to 10 m/s²)

Using the Second equation of motion;

s = ut + (1/2) at²

~ 10 = 0 + (1/2) gt²

~ t² = 20/9.8 = 100/49

~ t = 10/7 seconds = 1.42 seconds

Using the concepts of momentum, we got that kinetic energy never be negative. The reason behind my possible answer is -It is always greater than or equal to zero. The kinetic energy of a moving object is equals one-half product of its mass and the square of its velocity. Since the mass of the object can never be zero, the square of velocity makes the answer positive.

Kinetic Energy (Key Points)

Hence, kinetic energy never be negative, the possible reason for my answer is that- The kinetic energy of the moving object equals one-half  product of its mass and the square of its velocity. Since the mass of the object can never be zero, the square of velocity makes the answer positive.

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(Complete question) is:

can kinetic energy ever be negative? give a possible reason for your answer without making use of any equations.

They travel 16.5 m distance before coming to a stop from the moment they saw the deer.

Distance measures the length between objects or points without regard for direction. Distance is a scalar quantity.

We can define it as to how much ground an object has covered despite its starting or ending point.

Velocity = 25 m/s

Time = 0.75 sec

acceleration (a) = -8 m/s^2

As we know the distance formula,

s = ut + 1/2 at^2

=25×0.75 + 1/2 × (-8)×0.75×0.75

=18.75 - 2.25

=16.5

Hence, total distance travel by them is 16.5 m.

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From the calculation, there is a net force that acts on the car and then the acceleration that is produced by the net force is 0.296 m/s^2.

The term net force refers to the force that is acting on an object that makes it to move. We have to recall that the force of friction is the force the limits the motion of an object. In other words, it is the force of friction that makes a body not to be able to move and this must be overcome by the forward force when it is greater than the friction force.

Now;

Mass of the car = 1352 kg

Forward force = 7820 N

Coefficient of friction = 0.56

Frictional force = μmg

= 0.56 * 1352 kg * 9.8 m/s^2

= 7419.8 N

Net force = Forward force - Frictional force

= 7820 N -  7419.8 N

= 400.2 N

Then;

Net force = ma

m = mass

a = acceleration

a = Net force/m

a = 400.2 N/ 1352 kg

a = 0.296 m/s^2

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Option C. At some height when the pendulum is displaced by some angle the total initial energy will be concerned with potential energy due to work by gravity against the displacement.

Potential energy is the energy held with the aid of an item because of its role relative to different objects, stresses within itself, its electric price, or other elements.

Potential energy saved energy that relies upon the relative role of diverse elements of a device. A spring has greater potential power whilst it is compressed or stretched. A metal ball has extra capability power raised above the floor than it has after falling to Earth.

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Disclaimer:- your question is incomplete, please see below for the complete question.

In the lab, we applied the conservation of energy to a system to allow us to equate the initial energy to the final energy. How does the initial energy become stored in the system?

A. The energy is supplied by the tension in the string

B. The energy is part of mass

C. The force of gravity does work when it is displaced some height when the pendulum is displaced by some angle theta

D. I did work on the mass by displacing it some height when I displaced the pendulum by some angle theta.

An estimation of the amount of random error is + 1.08  g/cm³.

An error is taken into consideration randomly if the value of what's being measured every now and then goes up or once in a while goes down. a completely simple example is our blood pressure. although someone is wholesome, it is regular that their blood stress does now not continue to be exactly equal whenever it is measured.

Random errors are likewise referred to as variability, random version, or 'noise inside the device'. The heterogeneity within the human population results in exceedingly huge random variations in scientific trials. Systematic mistakes or bias refers to deviations that are not because of the threat alone.

Given data,

the mean value

Here, X = Σsum of all values/number of values

And, error = measured value - X

∴ error in the first result will be Δx = 15830 - 14,75

                                                       = + 1.08  g/cm³

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Disclaimer:- your question is incomplete, please see below for the complete question.

several groups of students used the same procedure to measure the density of a specific object. the 15 different results are listed below in units of g/cm3. at a 95% confidence interval, give an estimation of the amount of random error present in any single result of this procedure.

15.830

15.700

14.112

12.783

15.586

14.723

14.526

14.524

14.805

17.985

16.186

13.925

12.553

14.175

13.837