If a car has a mass of 1,300 kg and is moving at a constant velocity of 20 m/s, what is the net force acting on the car?

(a) The swimmer needs 3000 seconds before take a bath across that whole river.

(b) D = 2730 meters, which represents how far downstream the swimmer will be when they cross the river.

Two miles downstream, in the course of or closer to the entrance of a stream drifting downstream. in or around the end of a typical industrial process and the stages after fabrication that increase earnings for downstream products.

Downstream It is referred to as downstream if somehow the boat is moving downwards of the stream. The downstream speed in this situation refers to the boat's net speed. In this situation, still water is seen as being immobile.

Time = ?

d / v = t

3000 m / 1.0 m/s

T = 3000 s

Distance = ?

t * v = d

3000 s * 0.91 m/s

D = 2730 m

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The approximate number of taste buds that humans have is 10,000 (option C).

Tastebuds are any of the small organs on the tongue used for tasting.

Taste buds are cells on the tongue that allow one to perceive tastes, including sweet, salty, sour, bitter and umami.

Taste buds regenerate approximately every 10 days, which means injured taste buds usually repair on their own. The average adult human has between 2000 and 8000 tastebuds.

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The quantity of heat energy that must be transferred to 2.25 kg of brass to raise its temperature from 20 °C to 240 °C is 195030 J

First, we shall list out the given parameters from the question. This is shown below:

The quantity of heat energy that must be transferred can be obtained as follow:

Q = MCΔT

= 2.25 × 394 × 220

= 195030 J

Thus, we can conclude quantity of heat energy that must be transferred is 195030 J

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The quarterback is getting hit with a force of 100 Newtons.

We can use Newton's second law of motion:

Force = Mass * Acceleration

Given that the mass of the defensive lineman is 100 kg and the acceleration is 1 m/s², we can substitute these values into the equation:

Force = 100 kg * 1 m/s²

Force = 100 N

Therefore, the quarterback is getting hit with a force of 100 Newtons.

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Answer:

M1 L1 T-1

Therefore, linear momentum is dimensionally represented as [M1 L1 T-1].

The height of the tower if the distance AB is 50m is 22.36m.

What is distance?

Distance is a measurement of how far apart two objects or points are, either numerically or occasionally qualitatively. Distance can refer to a physical length in physics or to an estimate based on other factors in everyday language (e.g. "two counties over"). The term is also frequently used metaphorically to denote a measurement of the degree of separation between two common pieces (such as statistical distance between probabilistic or edit distance between strings of text). This is because spatial cognition is a rich source of implicatures in human thought. The concept of a metric space is used in mathematics to formalise the majority of these notions of distance, both literal and figurative.

Sol-Here in right ∆AOB

AB= 50m (as per given question)

Let height of the tower is =OD = A meters

in ∆AOD , tan theta= DO/AO

Tan 38= A/∆O

∆O= A /tan 38= a/0.78

Also in ∆ BOD

tan 29 = DO/BO

BO = a/tan 29°

=9/0.55

So a^2 = 500

=>a=10√5=22.36 approx.

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The best, most helpful observation you can make is to LOOK steadily and squarely at the PICTURE of the stack.

For some nefarious reason, you decided to prevent us from doing that.

The general driving forces behind most chemical interactions is the need for atoms to be electrically neutral and to complete their outer electron orbital area (shell).

When both the cases are fulfilled i.e. when the enthalpy change is negative and the entropy change is positive, the reaction is said to be spontaneous and thus enthalpy and entropy are the two thermodynamic driving forces of chemical reactions.

There are several factors that affects the driving force:

1. Release of heat (exothermic reactions are driven)

2. Free energy – the change in free energy should be negative

3. Entropy – An increase in entropy drives a reaction

4. Equilibrium Shift - Removal of products drives the reaction

The general driving forces behind most chemical interactions is the need for atoms to be electrically neutral and to complete their outer electron orbital area (shell).

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The net force on particle q₂, located between particles q₁ and q₃, is approximately 189000 N. The force exerted by particle q₁ on q₂ is positive and equals 252000 N, while the force exerted by particle q₃ on q₂ is negative and equals -63000 N.

To find the net force on particle q₂, we need to calculate the individual forces exerted on q₂ by particles q₁ and q₃ and then determine their sum.

The force between two charged particles can be calculated using Coulomb's law:

F = k * |q₁ * q₂| / r²

Where F is the force between the particles, k is the electrostatic constant (k ≈ 9.0 x \(10^9\) Nm²/C²), q₁ and q₂ are the charges of the particles, and r is the distance between them.

First, let's calculate the force exerted on q₂ by q₁:

F₁₂ = k * |q₁ * q₂| / r₁₂²

F₁₂ = (9.0 x \(10^9\) Nm²/C²) * |(8.0 μC) * (3.5 μC)| / (0.10 m)²

F₁₂ ≈ 252000 N

The force is positive because q₁ and q₂ have opposite charges.

Next, let's calculate the force exerted on q₂ by q₃:

F₂₃ = k * |q₂ * q₃| / r₂₃²

F₂₃ = (9.0 x \(10^9\)Nm²/C²) * |(3.5 μC) * (-2.5 μC)| / (0.15 m)²

F₂₃ ≈ -63000 N

The force is negative because q₂ and q₃ have the same charge.

Finally, we can find the net force on q₂ by summing the individual forces:

Net force = F₁₂ + F₂₃

Net force = 252000 N + (-63000 N)

Net force ≈ 189000 N

The net force on particle q₂ is approximately 189000 N.

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Answer:

24 m/s

Explanation:

V=Vi+at

given initial velocity is 0, acceleration is 2 and time is 12 sec

find final velocity by plugging in the variables into the equation above.

V=0+2x12=24m/s

Given the mass of the cell is 1 * 10⁻¹⁴ kg, the number of cells in the 65 kg person is  6.5 * 10¹⁵  cells.

The number of cells in a human is calculated as follows:

The mass of an average cell is ten times the mass of a bacterium.

The mass of a bacterium = 1 * 10⁻¹⁵ kg

mass of an average cell = 10 *  1 * 10⁻¹⁵ kg =  1 * 10⁻¹⁴ kg

Number of cells = mass of person/mass of cell

Number of cells = 65 kg/1 * 10⁻¹⁴ kg

Number of cells = 6.5 * 10¹⁵  cells.

In conclusion, the number of cells is obtained by dividing the mass of the person by the mass of a average cell.

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Note that the complete question is given below:

Assuming the mass of an average cell is ten times the mass of a bacterium (which is 10⁻¹⁵ kg): Calculate the number of cells in a human assuming the mass of the person is 10² kg.

Answer:

HOPE IT HELPS YOU!!!

Explanation:

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Answer:

Explanation:

a) To find a z value such that the probability of obtaining a larger z value is 0.05, we need to find the z value such that the area to the right of it is 0.05. Using a standard normal distribution table or calculator, we find that z = 1.645.

b) To find a z value such that the probability of obtaining a larger z value is 0.025, we need to find the z value such that the area to the right of it is 0.025. Using a standard normal distribution table or calculator, we find that z = 1.96.

c) To find a z value such that the probability of obtaining a larger z value is 0.20, we need to find the z value such that the area to the right of it is 0.20. This is equivalent to finding the z value such that the area to the left of it is 0.80. Using a standard normal distribution table or calculator, we find that z = 0.84 (rounded to two decimal places).

Answer:

a . Long wavelengths and low frequencies

Explanation:

Low energy waves usually show long wavelengths and a low frequency.

Energy of a wave is dependent on the wavelength and frequency of such a wave.  

   The wavelength of a wave is the distance between successive crests and troughs of a wave. The frequency of a wave is the number of waves that passes through a particular point per unit of time.

  Mathematically, wave energy;

               Energy  = h x f

 where h is the planck's constant

             f is the frequency

 Also,

              Energy  = \(\frac{h x speed of light}{wavelength}\)

 A high energy wave will have a high frequency and a long wavelength.

 A low energy wave have a low frequency and a long wavelength

Answer:

a

Explanation:

i just took the test

1. (NF)- splits the nucleus

2 lighter atoms

(BOTH)- releases lots of energy

2.(NF)- produces a heavy atom

combines 2 atoms

i’ve been up for 20 hours my dritydrops

Explanation:

Assuming constant speed:

Distance = speed × time

17.8 m = (5.3 m/s) t

t = 3.36 s

Answer:

Today's stereotyping, bias, and racial profiling can intersect with religion in several ways. In many cases, individuals who are members of certain religious groups may be subject to stereotyping and prejudice based on their beliefs, dress, or appearance. This can lead to bias and discrimination in employment, housing, and other areas of life.

Racial profiling, or the use of race or ethnicity as a factor in law enforcement practices, can also intersect with religion in cases where individuals of certain religious groups are targeted for surveillance or scrutiny based on their perceived association with terrorism or other criminal activities. This can lead to a breakdown of trust between law enforcement and the affected communities, and can have negative consequences for public safety.

Personal opinions fueled by social media outlets can also affect how we understand or view religious beliefs. Social media can provide a platform for individuals to express their opinions and beliefs, but it can also perpetuate stereotypes and misinformation about certain religious groups. This can lead to polarization and divisiveness, and can contribute to a climate of fear and suspicion towards certain religious groups.

To address these issues, it's important to promote education and awareness about different religious beliefs and practices, and to work towards building inclusive and respectful communities. This can involve engaging in dialogue with individuals from different religious backgrounds, challenging stereotypes and prejudices, and advocating for policies that promote equity and justice for all.

Explanation:

brain

The change in EPE (ΔU) as a charge of (a) 2.2 x 10⁻⁶ c and (b) -1.1 x 10⁻⁶c moving from A⇒B given that the change in EP (ΔU) between the points is 24V are 5.28 x 10⁻⁵ J and 2.64 x 10⁻⁵ J respectively.

The change in electric potential energy (ΔU) can be calculated using the equation ΔU = qΔV, where q is the charge and ΔV is the change in electric potential between the two points.

For a charge of 2.2 x 10⁻⁶ c moving from A to B:

ΔU = (2.2 x 10⁻⁶ c)(24 V) = 5.28 x 10⁻⁵ J

For a charge of -1.1 x 10⁻⁶ c moving from A to B:

ΔU = (-1.1 x 10⁻⁶ c)(24 V) = -2.64 x 10⁻⁵ J

The negative sign on the second case indicates that the work done would be done against the direction of the electric field and thus the energy would be absorbed from the field.

Therefore, the correct answers are as given above.

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The resultant wave for the two given waves is option (a). As the trough of first wave will add up with the crest of second wave. Therefore, the resultant will be the cancellation of crest and troughs and results into a straight line.

Without the Sun's gravity, the planets would stop moving because sun provides centripetal force to the planets.

A planet moves around the sun in a circular path due to gravitational force of attraction of the sun that provides the centripetal force. This centripetal force is responsible for circular motion of planet.

So we can conclude that without the Sun's gravity, the planets would stop moving because sun provides centripetal force to the planets.

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Answer:

B

Explanation:

Without the Sun's gravity, the planets would move off into space in

a straight line.

The speed of the river flowing is 3.75 km/h, and the canoe speed in a still lake for the same paddling effort is 3.6 km/h (approximately).

The distance between the two points upstream and downstream is equal to the distance traveled by the empty bottle. Hence, the distance traveled by the bottle = distance traveled by canoeists = 4 km.Total distance traveled = distance upstream + distance downstreamTotal distance traveled = 2.5 + 4 = 6.5 kmTotal time taken = 2 hours upstream + (4/6) hours downstream (since they are covering 4 km in downstream with the current flowing downstream)Total time taken = 3.67 hours upstream + downstreamFrom the definition of speed, the speed upstream is given by:Speed upstream = distance/time upstreamSpeed upstream = 2.5/2Speed upstream = 1.25 km/hSimilarly, the speed downstream is given by:Speed downstream = distance/time downstream Speed downstream = 4/(4/6)Speed downstream = 6 km/hThe speed of the canoe in still water is given by the average of the upstream and downstream speeds:Speed in still water = (1.25 + 6)/2Speed in still water = 3.625 km/h or 3.6 km/h (approximately).

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The type of radiation which can damage the living cells are the X-rays, beta particles, and the gamma rays. Thus, the correct option is A.

Radiations have been found to damage the DNA molecules present in the cells. High doses of the radiation damage the cell and these radiations could lead to Acute Radiation Syndrome (ARS) or Cutaneous Radiation Injuries (CRI). High doses of these radiation could also lead to formation of tumor and cancer later in the life.

Gamma rays are the most harmful external hazard or radiations among all the radiations and these result into acute effects. Beta particles are also harmful to the cell because these can partially penetrate the skin, causing beta burns in the skin. Alpha particles cannot penetrate the intact skin. Gamma and x-rays can pass through a person which results into damaging cells in their path.

Therefore, the correct option is A.

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Answer:

C) high efficiency light bulbs, because they produce more heat

Light bulbs produce useful energy in the form of light and waste energy in the form of heat, the kind of light bulb would you use to incubate eggs are low-efficiency light bulbs, because they produce more heat, therefore the correct answer is option B.

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

The type of light bulb you would use to incubate eggs is a low-efficiency light bulb since they produce more heat; consequently, option B is the right response. Light bulbs produce useful energy in the form of light and waste energy in the form of heat.

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Answer:

In a material, the magnetic behavior depends on the alignment of magnetic moments of the atoms. Magnetic moments are generated by the motion of the electrons in the atoms. When the magnetic moments of atoms in a material are aligned in a specific pattern, it creates a magnetic field which results in the material being magnetic.

In many materials, the magnetic behavior arises due to the alignment of magnetic domains, which are regions of atoms with magnetic moments aligned in the same direction. When many domains with aligned magnetic moments are present in a material, the material becomes magnetic.

The magnetic behavior of a material depends on the number of electrons and the arrangement of those electrons in the atoms. In particular, for an atom to have a magnetic moment, it must have unpaired electrons, meaning electrons that are not paired with another electron with the opposite spin. When these unpaired electrons in the atoms are aligned, they generate a magnetic moment. If all electrons are paired, there will not be a net magnetic moment, so the material will not be magnetic.

So, in summary, the magnetic behavior of a material is determined by the alignment of magnetic moments of atoms. When the magnetic moments of many atoms in a material align in the same direction, it creates a magnetic field, leading to a material being magnetic. This alignment is usually present in magnetic domains consisting of atoms with unpaired electrons.