True or False—The vector for a negative acceleration points in the opposite direction when compared to the vector for a positive acceleration.

Answer: D. prefrontal cortex

Explanation: The Prefrontal Cortex (PFC) and hippocampus are the most critical parts of the human brain for decision making

The statement that is true about mass and weight is as follows: Mass must be in kg and weight in N to do our calculations (option E).

Mass is the quantity of matter which a body contains, irrespective of its bulk or volume. The mass of a substance is measured in kilograms.

On the other hand, weight is the force on an object due to the gravitational attraction between it and the Earth. It is measured in Newtons.

The mass of an object is the same everywhere, however, it's weight is dependent on location. For example, the weight of an apple on Earth will differ from it's weight in Mars.

Therefore, the statement that is true about mass and weight is as follows: Mass must be in kg and weight in N to do our calculations.

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If a ruler is knocked off the end of a desk with a horizontal velocity of 1.2ms-1. If the desktop is 0.8m above the floor then the resultant velocity of the ruler would be 4.13 meters/seconds.

It can be defined as the motion of any object or body when thrown from the earth's surface and follows any curved path under the effect of the gravitational force of the earth.

The final velocity of the ruler can be calculated with the help of the third equation of motion in the vertical direction under the influence of gravity,

v² - u² = 2as

v = √(2gh)

  =√2*9.81*0.8

  = 3.96 m/s

The resultant velocity of the ruler = √(3.96² + 1.2²)

                                                        =4.13 meters / seconds

Time is taken to hit the ground = 3.96 / 9.81

                                                 =0.4036 seconds

The horizontal displacement of the ruler = 1.2*0.4036

                                                                    =0.48432 meters

Thus, the resultant velocity of the ruler would be 4.13 meters/seconds.

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If sample of silver and lead each had volumes equal to 1ml, Lead would have the greater mass, and the difference in the masses would be around 0.84grams

The mass of a physical body is a measure of its entire makeup. This also measures inertia, or the body's resistance to acceleration (change in velocity) in the presence of a net force.

The basic mass unit in the SI is the kilogram (kg)

The Density of Silver = 10.5 g / cm^3

The Density of Lead = 11.34 g / cm^3

So the masses given  volume of 1 cm^3 is:

mass of Silver = 10.5 grams

mass of Lead = 11.34 grams

So we see that Lead has greater mass for similar volume.

On solving the given problem we get

The difference is

11.34 – 10.5 = 0.84 grams

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When you square the unit of momentum, the new unit will be expressed as kg²m²/s².

Linear momentum is defined as the product of the mass (m) of an object and the velocity (v) of the object.

P = mv

where;

Unit of momentum is given as; kgm/s

When unit of momentum is squared, = (kg.m/s)² = kg²m²/s²

Thus, when you square the unit of momentum, the new unit will be expressed as kg²m²/s².

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The constant acceleration of the train is 0.33 m/s.

The average velocity can be calculated by using the formula:

velocity = distance/time

For the 1st car, the velocity is calculated as:

v₁ = 8.60 m / 1.80 s = 4.78 m / s

For the second car, velocity can be calculated as:

v₂ = 8.60 m / 1.66 s = 5.34 m / s

Now we can solve for the acceleration using the formula:

v₂² = v₁² + 2 a d

Rewriting in terms of a, we get

a = (v₂² – v₁²) / 2 d

a = (5.34)² – (4.78)² / (2 × 8.6)

a = 0.33 m/s

Therefore, the constant acceleration of the train is 0.33m/s.

what is acceleration explain?

acceleration, fee at which speed modifications with time, in terms of each pace and course. A factor or an object shifting in a directly line is improved if it hastens or slows down. motion on a circle is improved even if the velocity is steady, due to the fact the route is constantly converting

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A. The value of x in the given circular geometry is determined as 9.75.

The value of x can be calculated by applying the following rules of geometry as shown below.

angle AC = angle at the center

angle at center = twice angle at circumference

147 = 2(6x + 15)

147 = 12x + 30

147 - 30 = 12x

117  = 12x

x = 117/12

x = 9.75

Thus, the value of x in the given circular geometry is determined as 9.75.

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The uneven gamete division causes chromosomal abnormalities.

A gamete is a fully developed reproductive or sex cell with haploid chromosomes that has the capacity to mate with another haploid gamete to create a diploid zygote. The fusion (or combining) of two gametes, namely a male and a female gamete, results in the zygote. Fertilization is the process through which two gametes combine to form a zygote.

One of the gametes is typically bigger and non-motile, which is characteristic. It is sometimes referred to as an ovum or an egg cell. The second gamete cell is smaller and motile. It is also known as a sperm cell or a male gamete. In humans, each gamete has 23 chromosomes, and when they fuse, a diploid zygote with 46 chromosomes is created. These reproductive cells are created in the gonads, or reproductive organs, of the male and female animals. The male gametes in seed-bearing plants are the pollen, whereas the female gametes are housed in the plant's ovules. The gamete in plants, however, is not invariably a haploid cell.

Hence, Uneven gamete division causes the chromosomal abnormalities.

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The gravitational pull between the sun and Earth decreases if the sun was farther away from the earth.

Any two bodies' gravitational pull on one another is directly proportional to the product of their masses and inversely proportional to the square of their distance from one another.

How do the planets move in relation to the Sun? The planets' orbits around the Sun are maintained by the gravity of the Sun. The Moon orbits the Earth due to the Earth's gravitational pull on the Moon for the same reason. But if the Earth is being drawn to the Sun, why doesn't it fall into it or the Moon strike the Earth?

The cause of this is because Earth moves at a speed that is perpendicular to the Sun's gravitational pull. The planets are thus kept in their designated orbits by the Sun's attraction as well as their sideways motion. Similar to how the Earth orbits the Moon, the Moon does so without touching it.

F=G(M1M2)/R² where,

F denotes gravitational force between two bodies,

R is the distance between two bodies from their center,

M1 denotes mass of first body and,

M2 denotes mass of second body.

So according to the question, if the distance between two bodies will increase, then the gravitational force between them will also decrease.

Hence, if the sun was farther away from earth, then gravitational pull between the sun and earth will decrease.

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Answer:

d. 1-proton 2-nuetron 3-electron 4-nucleus

Answer:

Explanation:

Impulse of a force is defined as the product of the average force and the time interval for which the force acts on the body.

Answer:

The product of the force & the time for which it acts on a body is called impulse of a force.

The correct answer is Scoliosis is a spine curvature that occurs most frequently in adolescents.

Scoliosis is a spine curvature that occurs most frequently in adolescents.The most commonly used brace is made of plastic and contoured to fit the body. Because it fits under the arms and around the rib cage, lower back, and hips, this brace is almost invisible under clothing.

The majority of braces are worn between 13 and 16 hours per day. Idiopathic, congenital, and neuromuscular conditions The most common type of scoliosis is idiopathic. This means that the cause is unknown or that no single factor contributes to the disease's development.Scoliosis can improve with treatment, but it is not always a sign of something serious, and it is not always necessary if it is mild.

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Explanation:

the ratio between two circles vqjoizxcvu g çm

The ball reaches a height of 9.57 meters against gravity.

The acceleration an object experiences as a result of gravitational force is known as acceleration due to gravity. M/s2 is its SI unit. Its vector nature—which includes both magnitude and direction—makes it a quantity. The unit g stands for gravitational acceleration. At sea level, the standard value of g on the earth's surface is 9.8 m/s2.

A body is drawn toward the center of the earth by the force of gravity. Let's have a look at two bodies with masses ma and mb. When two bodies are subjected to equal forces, the force in terms of mass is given by:

The inertial mass of a body is defined as mb = ma [aA/aB].

In response to the gravitational pull of two bodies,

FA = GMmA/r2,

FB = GMmB/r2,

mB = [FB/FA] × mA

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The volume of the rectangular box is 39559.36 cm³.

Volume can be defined as the capacity of a solid substance. The S.I unit of volume is m³.

To calculate the volume of the rectangular box, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the volume of the rectangular box is 39559.36 cm³.

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A. The car's average velocity (in m/s) in the interval between t = 1.0 s to t = 1.5 s is 1 m/s

B. The car's acceleration (in m/s²) at t = 1.5 s is 0.4 m/s²

C. The speed of the car is increasing with time

Average velocity = total distance / total time

Average velocity = 0.5 / 0.5

Average velocity = 1 m/s

We'll begin by calculating the velocity at t = 1.5 s. This can be obtained as follow:

Velocity = Distance / time

Velocity = 0.9 / 1.5

Velocity = 0.6 m/s

Finally, we shall determine the acceleration . This is shown below:

Acceleration = velocity / time

Acceleration = 0.6 / 1.5

Acceleration = 0.4 m/s²

The acceleration we calculated above (i.e 0.4 m/s²) is positive. This simply indicates that the speed of the car is increasing.

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Missing part of the question:

(a) What is the car's average velocity (in m/s) in the interval between t = 1.0 s to t = 1.5 s?

(b) Using data from t = 1.0 s to t = 2.0 s, what is the car's acceleration (in m/s2) at t = 1.5 s?

(c) Is the car's speed increasing or decreasing with time?

25.487 km did the scramjet travel during its 11 second test.

Given that the scramjet travels at a speed seven times that of sound, speed v is equal to 7 x 331 m/s or 2317 m/s.

(A) We require the scramjet's travel time over a distance of

       d = 5000 km (5x10^6 m).

Using the formula

time taken = distance traveled/speed,

we can calculate the following:

(5x10^6)/2317 sec

= (5x10^6)/(23175x60) minute

= 5000000/139020 minutes

= 35.97 seconds

As 1 second equals 1/60 of a minute, Therefore, the travel time on Scramjet from San Francisco to New York will be 35.97 minutes.

(B) The distance covered by the Scramjet in 11 seconds must now be determined. as a result,

using speed, distance, and time relation.

Distance = Speed x Time

               = 7  x 331  x 11

                =  25487 m

Since 1 metre equals 1/1000 of a kilometer, 25487 m of 25.487 km

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The correct answer is option D. That is, the branch of Physics that study the particles movement at any speed, including very high speeds is Relativity

Kinematic is a branch of Physics that deal with a study of particle's motion without considering the cause of the motion. While dynamics deals with the motion of a particle as well as the causes of the motion.

The branch of Physics that study the particles movement at any speed,

including very high speeds is Relativity.

We have relativity of mass, relativity of time and relativity of length. All deal with the speed of light which is the fastest speed on earth as of now.

Therefore, the correct answer is option D. That is, the branch of Physics that study the particles movement at any speed, including very high speeds is Relativity.

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What is reference frame?

Reference frame can be described as the stationary background to which an object is compared to tell if it is moving.

A frame of reference is therefore a purely kinematical device, for the geometrical description of motion without regard to the masses or forces causing the motion.

The instance we discussed had different reference frames all of which are the stationary background of the objects.

In conclusion, reference frame of an object describes the motion without regard to the forces causing the motion.

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When an object is thrown with an angle with horizontal, it makes projectile motion

It is given that angle of projectile was 25 degree

The formulas of projectile motion is as follows:

component of velocity at time t = Vxcos[tex]\alpha[/tex]

time of maximum  height= vsin[tex]\alpha[/tex] /g

maximum height = (v sin[tex]\alpha[/tex] )^2/2g

horizontal range = v^2 sin2[tex]\alpha[/tex]/g

v is given to be 20 m/s

time of flight is given by v 2sin[tex]\alpha[/tex]/g

therefore, time of flight = 20 x 2x0.4226 /10 = 1.690 seconds

maximum horizontal range = 20 x 20 x 0.766/10 =30.641 meters

Disclaimer: The value of acceleration due to gravity is assumed to be 10 m/s^2 also the speed of velocity has no unit and hence m/s has been considered

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The correct answer is displacement.

Average velocity differs from average speed because displacement is used to calculate average velocity.

What is displacement?

Being a vector, displacement has both magnitude and direction. In one-dimensional motion, the direction should be stated with a plus or minus sign to ensure sure the direction is right. It always occurs in a straight line between two sites. Although it is not a vector variable and lacks a direction sign, the word "distance traveled" is also used to refer to the length of the path that was taken to get from one place to another. The distance traveled is not always equal in both magnitude and direction; on occasion, it may exceed the magnitude of the displacement between the sites.

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C. On an electrolytic or paper capacitor, the black band indicate that the capacitor is color-coded to military specifications.

Paper Capacitor is a fixed capacitor in which flat thin strips of metal foil, usually aluminium is separated by dielectric material paper.

Paper capacitor is used in electronic noise filtering, signal coupling and decoupling systems, and remote sensing systems.

The coloured bands represent the capacitance value as per the colour code. That is the capacitor is color-coded to specifications.

The black band usually indicate the specification of the capacitor.

Thus, on an electrolytic or paper capacitor, the black band indicate that the capacitor is color-coded to military specifications.

So the correct option is C.

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The speed of the electron when it is 10.0 cm from the +3.00 nC charge is 30×[tex]10^{-2}[/tex] meters per second.

Given :

q=3.00 nC

r=distance=10 c.m

we apply formula

Velocity of electron =qd

=10×[tex]10^{-2}[/tex]×3=30×[tex]10^{-2}[/tex] m/sec

The speed of electricity is determined by what you mean by the term "electricity." This is a broad term that essentially means "all things relating to electric charge." I'll presume we're talking about an electrical charge current moving through a metal wire, like the power cord of a light. Electrical currents passing through metal wires have three different velocities, all of which are physically significant:

The velocity of electron drift.

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The horizontal component of the force of cable is 2.22 kN. The vertical component of the force of cable is 6.1 kN.

If we draw a free body diagram of the force of the cable with its horizontal and vertical components, it will form a right angled triangle.

sin θ = Opposite side / Hypotenuse

cos θ = Adjacent side / Hypotenuse

θ = 20°

Hypotenuse = Force of cable = 6.5 kN

Opposite side = Horizontal component

Adjacent side = Vertical component

sin 20° = Horizontal component / 6.5

Horizontal component = 0.342 * 6.5

Horizontal component = 2.22 kN

cos 20° = Vertical component / 6.5

Vertical component = 6.1 kN

In a right angled triangle, trigonometric ratios can be used as mentioned below.

Therefore,

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100 grams of oil-heated to 80°C are added to 200 grams of water at 20°C. Then the resulting temperature would be 55.48°C.

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.

As given in the problem 100 grams of oil (specific heat capacity 2200 J/kg °C) heated to 80°C is added to 200 grams of water (specific heat capacity 4200 J/kg °C) at 20°C

mCΔT for oil =mCΔT for water

100×2200×(80-T) = 200× 4200×(T-20)

1760-22T = 84 T -1680

62T = 1760+1680

T = 55.48°C

Thus, the resulting temperature of the mixture would be 55.48°C.

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A. Experimental evidence is collected that supports that astrology is to be considered a science.

Through experiments and researches, we can collect a lot of evidences about the relationship between science and astrology. If the evidences are in favour of astrology so we can say that astrology is to be considered as science. The invention of the astrology was made in Babylon far back in antiquity. An astrology is not considered to be the part of the science, because there is no evidence present in the history that the astrology is the part of the science. But the main thing is that the astrology contains the logics, and logics is present in the science. So there is a very small relation between the astrology and the science.

So we can conclude that Experimental evidence is collected that supports it is the correct statement.

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A. Experimental evidence is collected that supports it.

B. The majority of people believe that its claims are true.

C. Its explanations are supported by a scientific law.

d. Government funding is used to support it.

Answer:10

Explanation: Acceleration of car is given by a= v^2/r, v= 50m/s, r= 250m a= 10 m/s^2 2