You are crouched at the "start" line. Bang! The race begins and 7 seconds later you end up 60 yards down the track. What was your "acceleration?"

Answer:

"H" is a chemical symbol and "H2" is chemical formula.

Answer:

D

Explanation:431.3

Answer:

1/4

Explanation:

Mechanical Advantage = Load/Effort

Given

Effort applied = 24N

Load = 6N

Substitute

MA = 6/24

MA = 1/4

Hence the mechanical advantage is 1/4

Answer:

4

Explanation:

24n/6n=4

True. Steam that is produced from a boiling pool of water will initially be saturated steam.

Saturated steam is a state where the steam and liquid water coexist in equilibrium at a given temperature and pressure. When water is heated, it undergoes a phase transition from liquid to vapor. At the boiling point of water, the temperature and pressure conditions are such that the liquid water converts into steam.

During the boiling process, the heat supplied to the water causes its temperature to rise until it reaches the boiling point. At this point, further heat input does not cause a temperature increase but instead converts the liquid water into steam. The steam produced at the boiling point is known as saturated steam.

Saturated steam contains the maximum amount of moisture it can hold at a given temperature and pressure. It is in equilibrium with liquid water, and any further addition or removal of heat will result in a change in the steam's quality or condition (e.g., superheated steam or wet steam).

Therefore, initially, the steam produced from a boiling pool of water will be saturated steam.

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Displacement is the movement of unfavorable emotions from one thing or person to another.

As a kind of self-preservation, displacement is the act of shifting one's unfavorable emotions from one thing or person to another.

According to the notion, releasing stress or worry on a non-threatening target helps a person deal with negative emotions like fear or rage.

For instance, if a person feels angry because their boss yells at them, they might project those feelings onto someone or something else, such a member of their family or a piece of furniture.

For fear of losing their work, the person could feel unable to face their manager. As a result, they might vent their rage on a less dangerous person like their partner or housemate.

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Answer:

the si unit of force is newton

The correct answer is e. None of the above alternatives gives a true statement. None of the statements in options a, b, c, and d are true when it comes to a modulus M over a ring R having a finite basis.

When a modulus M can be formed entirely from a finite set of elements, the modulus M is said to be finitely generated. M's finite basis does not, however, automatically imply that M is finitely generated. A basis is a set of linearly independent elements, and it might not be enough to produce all of the components of the modulus.

According to the assertion in option b, M must include nonzero items of nonzero order if it has a finite basis. This is untrue, though. The smallest positive number k, such that the element raised to the power of k equals the identity element, is referred to as the order of an element.

According to option c, every non-null element in a modulus with a finite basis has a null. Nevertheless, this claim is likewise untrue. It is possible for a modulus with a finite basis to have non-null elements without a null element.

According to option d, a ring R is a body, or a field, and only then can a modulus have a finite basis. However, this assertion is also untrue. Even though the ring R is not a field, a modulus can nonetheless have a finite basis. None of the given alternatives provides a true statement about a modulus M over a ring R having a finite basis.

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During a tennis volley, the force pair involved is the action-reaction forces.

When playing tennis and returning a volley, the force pair involved is the action and reaction forces. In the process of hitting the ball, the tennis racket exerts a force on the ball, which is the action force.

The ball, in turn, exerts an equal and opposite force on the racket, which is the reaction force.Both the racket and the ball experience the force of impact during the volley.

The force applied by the racket causes the ball to move forward, while the equal and opposite force applied by the ball pushes the racket back.

These two forces are referred to as action-reaction forces or force pairs. A force pair refers to a pair of forces that are equal in magnitude but opposite in direction.

These forces always act on different objects and occur simultaneously. In this scenario, the action force was exerted by the tennis racket while the reaction force was exerted by the ball.

Therefore, during a tennis volley, the force pair involved is the action-reaction forces.

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1.) Electrons go back into like a lower energy level then would be release a thing called a photon light.

2.) I'm not sure on the correct numbers exactly but if I remember correctly around 70-80 percent is nitrogen, around 20-25 is percent oxygen, 0.9 percent is argon, and 0.1 percent other gases. 

3.) Glass is made from sand at least that's one popular element of making sand. one gathered, they are put into a high temperature and would soon make glass coming out of it within time.

Magnitude: The magnitude of the vector is approximately 47.4 units. Direction: The direction of the vector is approximately 123.7 degrees counterclockwise from the positive x-axis.

To find the magnitude of the vector, we use the Pythagorean theorem:

Magnitude = sqrt((-25)^2 + 40^2) ≈ 47.4 units.

To find the direction of the vector, we use the inverse tangent function:

Direction = atan(40 / -25) ≈ 123.7 degrees counterclockwise from the positive x-axis.

The magnitude represents the length or size of the vector, which is found using the Pythagorean theorem. The x and y components of the vector form a right triangle, where the magnitude is the hypotenuse.

The direction represents the angle that the vector makes with the positive x-axis. We use the inverse tangent function to calculate this angle by taking the ratio of the y-component to the x-component. The result is the angle in radians, which can be converted to degrees. In this case, the direction is approximately 123.7 degrees counterclockwise from the positive x-axis.

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The internal resistance of an automobile battery was found to be 2.2Ω

Explain about resistance ?

Resistance is a measure of an electrical circuit's resistance to current flow. Resistance is measured in ohms, which is represented by the Greek letter omega (Ω). Ohms are named after German scientist Georg Simon Ohm (1784-1854), who researched the link between voltage, current, and resistance. He is credited for developing Ohm's Law.

Electrical resistance is a barrier to current flow in a circuit.

While driving to a particular spot with your family, you may have noticed that when your driver encounters an impediment on the road, he slows down the automobile.

v=25.0v

emf=8.5v

current=7.5

Vint=16.5v

v=IRint

16.5=7.5(Rint)

=2.2 Ω

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No, they do not sound equally loud. The loudness of a sound is also affected by the frequency of the sound, as well as the sound level.

The 1,000-Hz tone would sound louder than the 100-Hz tone, even though they are both at the same sound level of 70 dB. This is because the human ear is more sensitive to sounds in the frequency range of 2,000-4,000 Hz, which is where the peak of our hearing sensitivity occurs.

In this case, if we were to measure the loudness of the two tones in phons, the 1,000-Hz tone would have a higher phon value than the 100-Hz tone at the same sound level, indicating that it sounds louder to the human ear.  The loudness of a sound is typically measured in units called phon, which take into account both the sound level and the frequency response of the human ear.

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Answer:

we have to use the formula f=ma to find out the unknown force

Explanation:

mass = 9kg

accelration=3m/s^2

force = mass * acceleration

force = 9 * 3

force = 27 N(newton)

Answer:

S. offspring recieve a mix of genes from two different parents

Offspring acquire genes that are exactly the same as one parent’s genes. Option B is correct.

Given that,
To choose the statement best explains the genetic variation that results from sexual reproduction.

Sexual reproduction is the process of creating new organisms by combining the genetic details of two individuals of different genders. The genetic details in most animals is carried on chromosomes in the nucleus of reproductive cells called gametes, which unite to form a diploid zygote.

Here,
The solution is due to the fact that each parent has two distinct sets of genes. Furthermore, each parent only passes on half of their DNA to their offspring. And that the half that is passed on is arbitrary. All of this ensures that each child is born with a distinct set of genes.

Thus, Offspring acquire genes that are exactly the same as one parent’s genes. Option B is correct.

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Answer:

The work is 750 J

The power is 37.5 watt

Explanation:

Mechanical Work and Power

Mechanical work is the amount of energy transferred by a force. It's a scalar quantity, with SI units of joules.

Being \(\vec F\) the force vector and \(\vec s\) the displacement vector, the work is calculated as:

\(W=\vec F\cdot \vec s\)

If both the force and displacement are parallel, then we can use the equivalent scalar formula:

W=F.s

Power is the amount of energy transferred or converted per unit of time. In the SI, the unit of power is the watt, equal to one joule per second.

The power can be calculated as:

\(\displaystyle P=\frac {W}{t}\)

Where W is the work and t is the time.

a)

The table is pushed d=15 m across a room with a force F=50 N, thus the work is:

W=50 * 15 = 750 J

The work is 750 J

b)

The time needed to push the table is t=20 seconds, thus:

\(\displaystyle P=\frac {750}{20}=37.5\)

The power is 37.5 watt

Answer:

The man is standing on the plank then he is pulling the rope towards himself. He pushes forward with the legs so that pushes the plank "rope backwards

So that friction f acts in forward direction the plank.

The tension T in the rope is 100 N

\((A)  \frac{100}{3}  N  \: towards \: left\)

the fiction force f newtons.

\(Man's \:  F _{net} ⇒T−F=ma\)

\(F _{net}  (man)⇒T−F=50a\)

\(Plank  Fnet ⇒T+f=ma\)

\(F _{net}  ( plank)⇒T+f=lov \: a\)

\(As T=100 N\)

\(a = \frac{4}{3} {m/s}^{2} \)

\(f = \frac{100}{3} \: newton\)

Answer:

Man applies a force of 100 N,therefore,F=100N.

\(m=m_o+m_p\)

\(m = 50 + 100\)

\( \implies{m = 150 kg}\)

Now,

We know that F=\(100 N\)

\( \implies{ \displaystyle{ a = \frac{F}{m} }}\)

\( \implies{ \displaystyle{a = \frac{100}{150} }}\)

\(\therefore{ \displaystyle{a = \frac{2}{3}m/ {s}^{2} }}\)

Now,let's find the fiction force acting on the man.

\(F=m_oa\)

\(F=50×\frac{2}{3}\)

\(\therefore F=\frac{100}{3} N\)

The acceleration of the crate after it begins to move is 0.5 m/s²

We'll begin by calculating the the frictional force

Mass (m) = 50 Kg

Coefficient of kinetic friction (μ) = 0.15

Acceleration due to gravity (g) = 10 m/s²

Normal reaction (N) = mg = 50 × 10 = 500 N

Fբ = μN

Fբ = 0.15 × 500

Frictional force (Fբ) = 75 N

Force (F) = 100 N

Fₙ = F – Fբ

Fₙ = 100 – 75

Mass (m) = 50 Kg

Net force (Fₙ) = 25 N

a = Fₙ / m

a = 25 / 50

Therefore, the acceleration of the crate is 0.5 m/s²

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Answer:

The answer is "26.208 km"

Explanation:

Given value:

\(\to S= 2.6 \ \frac{m}{s}\\\\\to t= 2.8 \ hours\)

Formula:

\(d= st\\\\d= 2.6 \times 2.8 \times \frac{60 \times 60}{1000}\\\\d= 26.208\ km\)

A horizontal line, not on the x-axis.

The beginning acceleration of both the particles is equal to 2b, according to the question.

The rate at which velocity changes is called acceleration. Acceleration often indicates a change in speed, but not necessarily. An item that follows a circular course while maintaining a constant speed is still moving ahead because the vector of its motion is shifting.

By calculating the derivative of position function in respect to time, it is possible to calculate the particle's initial acceleration.

The velocity function is the first component of the positioning function with regard to time.

v(t) = \(3at^2 + 2bt + c\)

The acceleration function is the second derivatives of both the position functional with respect to time:

a(t) = 6at + 2b

At time t=0, the initial acceleration of the particle is given by:

a(0) = 6a * 0 + 2b = 2b

So, the initial acceleration of the particle is equal to 2b.

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750 mg of mercury bichloride (HgCl2) are needed to make 300 ml of a 1:400 w/v solution.

To determine the amount of mercury bichloride (HgCl2) needed to make a 1:400 w/v (weight/volume) solution, we need to calculate the mass of HgCl2 required based on the given concentration and volume.

In a 1:400 w/v solution, the ratio indicates that there is 1 gram of solute (HgCl2) dissolved in 400 mL of solution.

First, let's convert the volume to milliliters (ml):

300 ml = 300 ml

Now, we need to calculate the mass of HgCl2 needed:

1 gram HgCl2 is dissolved in 400 mL

x grams HgCl2 is dissolved in 300 mL

To find x (the mass of HgCl2), we can set up a proportion:

1 g / 400 mL = x g / 300 mL

Cross-multiplying:

400x = 1 × 300

400x = 300

x = 300 / 400

x = 0.75 grams

Since the question asks for the amount in milligrams (mg), we can convert grams to milligrams:

0.75 grams = 750 mg

Therefore, 750 mg of mercury bichloride (HgCl2) are needed to make 300 ml of a 1:400 w/v solution.

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Answer:

Metamorphic

Explanation:

Metamorphic rocks form when rocks are subjected to high heat and high PRESSURE.

In a series circuit, the current that flows through one resistor is the same current that flows through all the other resistors in the circuit.

This is because there is only one path for the current to flow through, so it must flow through each resistor in turn. Therefore, the current in series resistors is constant for all resistors.

On the other hand, the voltage drop across each resistor depends on the resistance of that particular resistor. According to Ohm's Law, the voltage drop across a resistor is proportional to the resistance of the resistor and the current flowing through it.

Therefore, the voltage drop across each resistor in a series circuit will be different, since each resistor has a different resistance. The larger the resistance of a particular resistor, the larger the voltage drop across it will be, given a constant current.

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Answer:

b

Explanation:

b

Kinetic Energy. Energy is transferred from one object to another when a reaction takes place. Energy comes in many forms and can be transferred from one object to another as heat, light, or motion, to name a few. For the blue ball to move to the position of the green ball, energy must be given to the blue ball.

Answer:

  3.6 kN

Explanation:

Given a giant squid has a mass of about 0.37 tons, you want its weight in newtons.

Weight in newtons is the force that results from the acceleration of a mass by gravity.

  F = ma

  F = (0.37 Mg)(9.8 m/s²) ≈ 3.6 kN

__

Additional comment

We can multiply 0.37 t = 370 kg by g = 9.80655 m/s² to get 3628.4605 N. However, the mass is given to 2 significant figures, so the product cannot be more precise than 2 significant figures. That is why we rounded it to 3600 N or 3.6 kN.

1 Mg is 1000 kg, or 1 t (metric ton)

27m./s speed do a bicycle and its rider, with a combined mass of 120 kg , have the same momentum as a 1800 kg car traveling at 5.4 m/s.

Speed can be defined as the distance travelled by the object per unit time. Momentum can be defined as the product of the mass and the speed of the object.

The equation for the momentum is     p = mv

Here, m is the mass of the object and v is the speed of the object. The equation for the impulse is,                 I = mΔ v

Here, m is the mass and is the change in momentum. The equation for the change in speed is                      

Here,   ΔV = \(V_{f} -V_{i}\)

is the initial speed \(v_{i}\)

is the final speed.\(v_{f}\)

Step: 1

The equation for the momentum of the bike and rider is, P (B+R)= M \((B+R)^{V}\)…… (1)

Here, M (B+R) is the mass of the bike and rider, and v is the speed of the bike and rider.

The equation for the momentum of the car is \(P_{car} = m_{car} V_{car}\)…… (2)

Here,

\(m_{car }\)is the mass of the car and

\(V_{car}\)is the speed of the car.

According to the question, the momentum of the bike and rider is the same as that of the momentum of the car, that is,

Substitute the equations (1) and (2) in above equation.

\(M_({B+R^{v} )}\)= \(M_{car}V_{car}\)

Rearrange the above equation for v.  v = \(M_{car}V_{car}\)/\(M_({B+R^{} )}\)

Substitute  1800 kg for\(M_{car}\) , and for 5.4m/s in above equation.

v = ( \(\frac{(1800) (5.4)}{120}\) = 27m./s

Here, the momentum of the bike and rider is depending on the combined mass of the bike and rider and the speed of the bike and raider.

Measurement is the most important concept in science. There are many measurable quantities that are measured in basic or fundamental physical  units. Speed ​​is one such measurable quantity that measures the ratio of the distance travelled by an object to the time it takes to travel. Acceleration is defined as the rate of change of velocity with respect to time. Acceleration is a vector quantity because it has both magnitude and direction. It is also the second derivative of position with respect to time or  the first derivative of velocity with respect to time.

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Answer:

False

Explanation:

Solid particles have the least amount of energy, and gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles. A change in phase may occur when the energy of the particles is changed.