in which of the following conditions does the velocity of the car NOT change?

Motor vehicle crashes account for more than 90% of all transportation-related fatalities.Motor vehicle crashes are a significant contributor to fatalities in transportation-related incidents worldwide.

They encompass accidents involving cars, trucks, motorcycles, and other vehicles on roads. The high percentage indicates that the majority of fatalities in transportation are directly linked to motor vehicle accidents. This highlights the urgent need for improving road safety measures, promoting responsible driving behaviors, and implementing effective traffic regulations to reduce the number of accidents and ultimately save lives. Efforts such as enforcing seatbelt usage, discouraging distracted driving, and educating the public on the dangers of impaired driving can contribute to decreasing this alarming statistic.

Lern more about transportation here:

https://brainly.com/question/11161029

#SPJ11

Answer:

R = 1.71 ohms

Explanation:

Two resistors are connected in parallel. There equivalent resistance is given by :

\(\dfrac{1}{R}=\dfrac{1}{R_1}+\dfrac{1}{R_2}\)

Put all the values,

\(\dfrac{1}{R}=\dfrac{1}{3}+\dfrac{1}{4}\\\\R=1.71\ \Omega\)

So, the resultant resistance of the circuit is equal to 1.71 ohms.

The intensity of the electromagnetic wave with a peak electric field strength of 250 V/m is 82.8 W/m².

The intensity of an electromagnetic wave is determined by the square of its peak electric field strength. In this case, the given peak electric field strength is 250 V/m. To calculate the intensity, we square this value and use the equation:

Intensity = (Electric Field Strength)² / (2 * Permittivity of Free Space)

Using the given permittivity of free space (8.85 x 10⁻¹² C²/Nm²), we can substitute the values into the equation and solve for the intensity.

Intensity = (250 V/m)² / (2 * 8.85 x 10⁻¹² C²/Nm²)

         = 62500 V²/m² / (2 * 8.85 x 10⁻¹² C²/Nm²)

         = 82.8 W/m²

Therefore, the intensity of the electromagnetic wave with a peak electric field strength of 250 V/m is 82.8 W/m².

The intensity of an electromagnetic wave is a measure of its power per unit area. It is directly proportional to the square of the electric field strength. In this scenario, we are given the peak electric field strength of the wave (250 V/m) and the permittivity of free space (8.85 x 10⁻¹² C²/Nm²).

By using the equation for intensity and substituting the values, we calculate the intensity of the wave to be 82.8 W/m². This value represents the amount of energy the wave carries per unit area.

The relationship between electric field strength and intensity provides insights into the power and behavior of electromagnetic waves.

Learn more about intensity

brainly.com/question/13155277

#SPJ11

The minimum height required for a simple water-filled barometer to work when the atmospheric pressure is 102.5 kPa is approximately 10.5 meters.

What is Density?

Density is a physical quantity that measures how much mass is contained in a given volume of a substance. It is a property of matter and is defined as the mass per unit volume of a substance. The density of a substance can be calculated by dividing its mass by its volume.

The height of the water column in a simple water-filled barometer is directly proportional to the atmospheric pressure. The formula to calculate the height of the water column is given by:

h = P/(ρ*g)

where h is the height of the water column, P is the atmospheric pressure, ρ is the density of water, and g is the acceleration due to gravity.

Substituting the given values, we get:

h = (102.5*\(10^{3}\) N/\(m^{2}\)) / (1000 kg/\(m^{3}\) * 9.81 m/\(s^{2}\))

h ≈ 10.5 m

Therefore, the minimum height required for a simple water-filled barometer to work when the atmospheric pressure is 102.5 kPa is approximately 10.5 meters.

Learn more about Density, visit;

https://brainly.com/question/26364788

#SPJ4

Answer:

Explanation:D

When two atoms bond chemically it is because of the interaction between the valence electrons in each atom because only the valence electrons of an atom are responsible for the chemical activity.

Therefore the correct answer is option D.

A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products.

Because only an atom's valence electrons are responsible for the chemical activity and because the quantity of valence electrons indicates an atom's valency,

Valency is a highly important requirement for the chemical reactivity of any element, two atoms connect chemically as a result of their contact.

Thus, the correct answer is option D.

To learn more about chemical reactions here, refer to the link;

brainly.com/question/22817140

#SPJ6

Visible light, ultraviolet rays, and X-rays are all forms of electromagnetic radiation, with differences in their wavelengths, frequencies, and energies.

Visible light is the part of the electromagnetic spectrum that human eyes can perceive. It has a wavelength range of 400-700 nanometers, with violet having the shortest wavelength and red having the longest. Visible light can be refracted, reflected, and diffracted, and it can be split into its component colors using a prism.

Ultraviolet (UV) rays have shorter wavelengths and higher frequencies than visible light. They have wavelengths between 10-400 nanometers. UV radiation is classified as UVA, UVB, and UVC, with UVC having the shortest wavelength and highest energy. UV rays can cause damage to DNA and can cause sunburn and skin cancer.

X-rays have even shorter wavelengths and higher frequencies than UV rays. X-rays have wavelengths between 0.01-10 nanometers. They can penetrate through materials that visible light and UV radiation cannot, such as body tissues and bones, making them useful in medical imaging. X-rays are also produced in outer space and can be used to study the universe.

In summary, the main differences between these types of electromagnetic radiation are their wavelengths, frequencies, and energies, which determine their properties and potential applications.

To know more about X-rays click this link -

brainly.com/question/29861000

#SPJ11

Answer:

Explanation:

Given:

V = 2.1 v

I = 0.30 A

R = Unknown

Solution:

R = V / I

= 2.1V / 0.30A

= 7Ω

Answer:

7Ω is the resistance of the wire in ohms

The resistance of the wire will be 7 ohms. Resistance is the antagonism strength shown in the discharge of the electric current.

Resistance is the opposition force offered in the flow of the electric current. It is denoted by R.It s unit is ohms.

The given data in the problem is;

V is the potential difference  = 2.1 v

I is the current = 0.30 A

R  is the resistance =?

According to Ohm's law resistance is the ratio of the voltage to the current.

\(\rm R = \frac{V}{I} \\\\ \rm R = \frac{2.1}{0.30} \\\\ \rm R = 7 \ ohm\)

Hence the resistance of the wire will be 7 ohms.

To learn more about the resistance refer to the link;

https://brainly.com/question/20708652

The potential energy would decrease by 0.16 J. The correct answer is C.

To find the change in potential energy, we need to use the formula

∆U = -q∆V,

where q is the charge and ∆V is the change in electric potential.

The change in electric potential is given by ∆V = Ed, where E is the electric field and d is the displacement of the charge.

Since the electric field is uniform and points to the right, the displacement of the charge in the x-direction is the only factor that will affect the change in electric potential. The displacement in the x-direction

is 16m - 0m = 16m.

Plugging in the values into the formula, we get:

∆U = -(2 x 10^-3 C)(5 V/m)(16m)

∆U  = -0.16 J
.

To learn more about  Potential energy :

https://brainly.com/question/1242059

#SPJ11

To determine the number of half-lives that have elapsed, we need to compare the ratio of 14C to 14N atoms found in the hip bone fragment.

The ratio of 1 14C atom for every 31 14N atoms suggests that the hip bone fragment contains a smaller amount of 14C compared to the expected ratio found in a living organism. Since 14C undergoes radioactive decay with a half-life of approximately 5730 years, we can calculate the number of half-lives that have elapsed by observing how many times the ratio needs to double to reach the expected ratio.

In this case, if the expected ratio is 1:1, then the observed ratio of 1:31 would require five doublings to reach 1:1. Therefore, approximately five half-lives have elapsed since the death of the organism from which the hip bone fragment originated.

learn more about fragment click here;

brainly.com/question/10596402

#SPJ11

Option D, the sentence that best describes the object is the material of the object can be magnetized.​

The direction of the magnetic fields of the atoms that make up an object is always aligned towards the north pole or south of the material.

Objects that are made of unmagnetised  materials such iron, cobalt and nickel are attracted to either pole of a magnet, but not repelled.

The diagram given shows unmagnetised material, and hence the material of the object can be magnetized.​

Learn more about magnets here: https://brainly.com/question/14997726

#SPJ1

The feature of the components that changes in chemical reactions is the chemical bonds between atoms. Option D

Chemical reactions involve the rearrangement of atoms to form new substances with different chemical properties. In a chemical reaction, the bonds between atoms in the reactant molecules break, and new bonds form to create the products. This rearrangement of atoms is governed by the principles of chemical bonding.

Chemical bonds are formed when atoms share or transfer electrons to achieve a more stable configuration, typically by filling their outermost electron shells. Different types of chemical bonds can exist, including covalent bonds, ionic bonds, and metallic bonds, depending on the nature of the atoms involved.

During a chemical reaction, the types of atoms involved and the numbers of atoms remain the same. The atoms themselves do not change; rather, they rearrange to form new compounds or molecules. The chemical equation for a reaction represents this rearrangement, showing the reactant molecules on one side and the product molecules on the other side.

For example, in the combustion of methane (CH4), the methane molecule reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O):

CH4 + 2O2 -> CO2 + 2H2O

In this reaction, the carbon and hydrogen atoms from methane combine with oxygen atoms to form carbon dioxide and water molecules, respectively. The chemical bonds between the atoms break and new bonds form to create the products. Option D

For more such questions on chemical bonds visit:

https://brainly.com/question/12707167

#SPJ11

Answer:

No

Explanation:

The gravitational force always acts opposite the direction of motion. Air resistance only acts on objects that are moving. The force of friction does not exist when an object is stationary. All objects experience a normal force.

btw pls mark as branliest! Thanks!

The answers are A. The period of the wave is 4 × 10⁻⁴ s, B. The frequency is 2500 Hz and C. The wavelength is 6 cm.

For more questions on frequency

https://brainly.com/question/254161

#SPJ8

The unit in which force is measured.

A newton is the unit in which force is measured because it represents the amount of force required to accelerate a 1 kilogram mass at a rate of 1 meter per second squared. In other words, it is the force needed to cause a mass of 1 kilogram to accelerate at a rate of 1 meter per second squared. This relationship between force, mass, and acceleration is described by Newton's second law of motion. The unit is named after Sir Isaac Newton, a physicist and mathematician who formulated the laws of motion.

Answer:

hlo

Explanation:

plzz mark me as brainlest

i can do anything

Answer:

Yes

Explanation:

An atom is made up of itself. Yes this is crazy but true. So far we have found the universe is everlasting, and the universe is part of itself meaning there nothing outside, except heaven and hell

A new measure of depression correlates very poorly with a new measure of happiness. it is likely that the new measure of depression has good criterion validity.

Cortisol levels in the hippocampus rise as a result of depression, which inhibits neural growth in the brain. The decline in function of the damaged part is closely correlated with the atrophy of brain circuits. The amygdala grows as a result of elevated cortisol levels, while other cerebral regions shrink.

A depression can permanently harm the brain, causing long-term memory loss and concentration problems in addition to making a person feel sad and depressed. Up to 20% of those who suffer from depression never fully recover. Depression makes dangerous behaviors, including drug or alcohol addiction, more likely.

To learn more about depression please visit -
https://brainly.com/question/17293944
#SPJ4

The speed of water in the constriction is faster when compared to the rest of the pipe.

The venturi effect consists of a physical phenomenon applied in fluid dynamics in which the pressure of flow decreases when there is a constraint in the conduct, accompanied by an increase in velocity of the fluid due to a decrease in cross-sectional area of the conduct.

The constriction is said to have a lower radius when compared to the rest of the pipe.

Applying the equation of continuity, A₁ v₁ = A₂ v₂

where, A is the area

v is the velocity

It is said from the above equation that, if area decreases velocity increases and if area increases velocity decreases, as velocity and area are inversely proportional to each other.

To know more about constriction:

https://brainly.com/question/17191659

#SPJ4

Answer:

60 kWh

Explanation:

The computation of the annual energy consumption in KW-h is shown below:

As we know that

1 kw = 1000 w

So, for 1400 W it would be

= 1,400 ÷ 1,000

= 1.4 kW

Now the number of hours it used in a year

= 7 minutes × 365 days ÷ 60 minutes

= 42.58333 hours

So in one year it used

= 1.4 kW × 42.58333

= 59.61 kWh

= 60 kWh

The amount of heat required to evaporate 20 g of water at 100 °C is 10,800 calories and the amount of heat required to convert 28 g of ice at -16 °C to 24 °C into liquid water is 3,136 calories.

What is heat?

Heat is a form of energy that is transferred between objects or systems due to temperature differences. It is the energy that flows from a higher temperature object to a lower temperature object.

Q = m * H

Q = 20 g * 540 cal/g

Q = 10,800 cal

Therefore, the amount of heat required to evaporate 20 g of water at 100 °C is 10,800 calories.

     2. Heating 28 g of ice from -16 °C to 24 °C until it becomes liquid water:

First, calculate the heat required to raise the temperature of the ice from -16 °C to 0 °C:

Q1 = m * C * ΔT

Q1 = 28 g * 0.5 cal/g °C * (0 °C - (-16 °C))

Q1 = 224 cal

Next, calculate the heat required to melt the ice at 0 °C:

Q2 = m * H

Q2 = 28 g * 80 cal/g

Q2 = 2,240 cal

Then, calculate the heat required to raise the temperature of the water from 0 °C to 24 °C:

Q3 = m * C * ΔT

Q3 = 28 g * 1 cal/g °C * (24 °C - 0 °C)

Q3 = 672 cal

Total heat = Q1 + Q2 + Q3

Total heat = 224 cal + 2,240 cal + 672 cal

Total heat = 3,136 cal

Therefore, the amount of heat required to convert 28 g of ice at -16 °C to 24 °C into liquid water is 3,136 calories.

To learn more about heat,

https://brainly.in/question/54170243

#SPJ4

Answer:

answer is 4

Explanation:

The charge that is moved is required.

The magnitude of charge moved is option 4. \(2\times 10^{-3}\ \text{C}\)

V = Potential difference = 10.0 V

W = Work done = \(2\times10^{-2}\ \text{J}\)

q = Magnitude of charge

When work done on moving a charge is divided by the potential difference we get the magnitude of the charge that is moved.

The charge of an object is the result of an excess or a lack of positive or negative charges on a body.

So, the magnitude of charge is given by

\(q=\dfrac{W}{V}\\\Rightarrow q=\dfrac{2\times 10^{-2}}{10}\\\Rightarrow q=2\times 10^{-3}\ \text{C}\)

Learn more about potential difference:

https://brainly.com/question/469388

The lowest frequency of light that can exist is zero hertz (Hz), which is also known as direct current (DC).

This is because light is a type of electromagnetic radiation that consists of oscillating electric and magnetic fields. These fields oscillate at a certain frequency, and the frequency determines the energy and properties of the light.

However, in the absence of any oscillation, there is no frequency and hence no light. In other words, the lowest frequency of light is no light at all.

It's worth noting that there are other forms of electromagnetic radiation that have frequencies lower than visible light, such as radio waves and microwaves. These types of radiation have frequencies that range from about 3 kilohertz (kHz) to several gigahertz (GHz).

To know more about direct current here

https://brainly.com/question/10715323

#SPJ4

Answer:

3420.39 N

Explanation:

Applying,

Fd = 1/2(mv²-mu²)................. Equation 1

Where F = force on the bumber, d = distance, m = mass of the car, v = final velocity, u = initial velocity.

make F the subject of the equation

F = (mv²-mu²)/2d............... Equation 2

From the question,

Given: m = 890 kg, v = 0 m/s (to rest), u = 1.4 m/s, d = 0.255 m

Substitute these values into equation 2

F = [(890×0²)-(890×1.4²)]/(2×0.255)

F = -1744.4/0.51

F = -3420.39 N

The negative sign denotes that the force in opposite direction to the motion of the car.

Answer:

object stop

Explanation:

Temperature and energy ➡️ Surface temperature and ocean temperature

Atmospheric composition ➡️ Carbon-dioxide and other greenhouse gases

Ocean and water ➡️ Ocean acidification and sea level

Cryosphere ➡️ Sea ice and galciers

Here are the answers

A) To find the frequency of the fundamental mode of vibration, we can use the formula:

f1 = (1/2L) * √(T/μ)

where f1 is the fundamental frequency, L is the length of the wire, T is the tension, and μ is the linear mass density.

First, we need to calculate μ. The mass is given in grams and needs to be converted to kilograms:

mass = 3.70 g = 0.00370 kg

Now we can find μ:

μ = mass / length = 0.00370 kg / (0.400 mm * 10^(-3) m/mm) = 9.25 kg/m

Now we can find the fundamental frequency:

f1 = (1/(2 * 0.400 * 10^(-3))) * √(985 N / 9.25 kg/m) ≈ 1680 Hz

B) To find the highest harmonic that can be heard by a person with an upper limit of 1000 Hz, we can use the formula:

n = f_max / f1

where n is the number of the highest harmonic, and f_max is the maximum frequency a person can hear.

n = 1000 Hz / 1680 Hz ≈ 0.595

Since the number of harmonics must be a whole number, the highest harmonic that can be heard is n = 0, which means that this person would not be able to hear any of the harmonics of this piano wire.

Learn more about frequency here:

https://brainly.com/question/31189964

#SPJ11

Answer:

Yes it can.

Explanation:

A object undergoing a constant acceleration has a constantly changing velocity. If the acceleration always points in the same direction as the velocity, the trajectory will be no different than if there were no acceleration, but in general acceleration will change the trajectory.