Help plz..,, due tommorow

Answer:

A.) Carbon

Explanation:

Carbon is an element on the periodic table.

it has the symbol C, and is found in almost every single thing!

Answer:

Carbon

Explanation:

Ig

Stem cells is a population of cells that can be maintained for years.

Stem cells are undifferentiated cells that have the capacity to differentiate into a wide variety of body cells.

Here,

The only cells in your body that can differentiate into other cell types, including blood, bone, and muscle cells, are stem cells. They also fix tissue that has been harmed.

Stem cells are now important in the treatment of blood cancer and blood disorders. Stem cells may potentially be used to treat a wide range of other diseases, according to medical researchers.

Stem cells are highly valuable for ageing research since they are thought to be immortal in culture. Increased proteostasis, which regulates protein quality, governs this longevity.

An association between elevated proteostasis and the immortality of human embryonic stem cells was discovered by a study team.

Hence,

Stem cells is a population of cells that can be maintained for years.

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5.1.1. The force that the wall will exerts on the car during this time will be 360000N.

5.1.2. The force the wall will now exert will be 120000N.

What is force?
Force is a physical influence that is capable of changing the motion of an object or altering its shape and structure. It is a vector quantity that is measured in newtons and is often described as a push or pull. Force can be caused by many different sources such as gravity, friction, and electromagnetism. Force can also be created through the application of energy, such as when a person pushes an object or when an object is acted upon by a magnetic field.

5.1.1. The force that the wall will exert on the car during the 0.25 seconds is calculated using the equation F=m*a, where F is force, m is mass and a is acceleration.

F = 900 kg * (100 km/h / 0.25 s)

F = 360000 N

5.1.2. The force that the wall will exert on the car during the 0.75 seconds is calculated using the same equation.

F = 900 kg * (100 km/h / 0.75 s)

F = 120000 N

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10.012ml is the actual volume of water measured out.

What does the word "volume" mean?

Each thing in three dimensions takes up some space. The volume of this area is what is being measured. The space occupied within an object's borders in three dimensions is referred to as its volume. It is sometimes referred to as the object's capacity.

The measure of how densely a material is packed together is called density. As the mass per unit volume, it has that definition. Typically, there are two forms of density: absolute density and relative density. The ratio of a substance's density to the density of a reference material is known as its relative density, sometimes referred to as specific gravity. Water is frequently used as the reference material.

D ⇒ M/V

V ⇒ M/D

M ⇒ 9.990g

D⇒ 0.9978g/ml

V ⇒ 9.990/0.9978 ⇒ 10.012ml

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Option C: The thin rod with the axis through the center will rotate faster, if the same torque is applied to each.

A force that can cause an object to rotate around an axis and generate a twisting movement is measured. It is a vector quantity with SI units equivalent to Nm. It can generally be expressed as:

τ = rFsinθ

The force F must be applied at a location r distant from the pivot point in order to generate a torque. The following factors affect the torque's size:

F: the applied force; larger forces provide more torque.

Radius r: The torque rises as the radius does.

Angle between the force and the lever arm: Increasing the torque by applying a force perpendicular to the lever arm.

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Given the following two objects, if the same torque is applied to each, which will rotate faster?

A. The thin rod with the axis through the end will rotate faster.

B. It is impossible to tell from the given information.

C. The thin rod with the axis through the center will rotate faster.

D. They will have the same angular velocity.

Work is characterized as a force that causes an object to move or be displaced.  The work done would be 455040.

Work is the scalar product of the force acting on an object and the displacement that force causes when the force is constant.

Despite the fact that work lacks a direction due to the scalar product (or dot product) aspect of vector mathematics, force and displacement are both vector quantities.

"W" stands for work, "F" is the force, and "d" represents displacement (or the distance the object travels).

Therefore, Work is characterized as a force that causes an object to move or be displaced.  The work done would be 455040.

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Answer:

See below

Explanation:

No energy has been added to the system to make it swing higher than from where it was released....actually....some energy has been LOST in the system due to air friction, so the balloon will not swing QUITE as high as from where it was released.

When an orange falls off a tree, gravity pulls it downward. Gravity is the force that attracts objects towards the center of the Earth, so the orange would be pulled towards the ground.

Gravity is a force that attracts objects towards the center of the Earth. When an orange falls off a tree, the force of gravity acts on it, pulling it downward towards the ground. This is because gravity exerts a force on all objects with mass, causing them to accelerate towards the Earth's surface. The direction of gravity is always vertically downward, regardless of the orientation or position of the object. Therefore, the orange experiences a downward pull due to gravity as it falls from the tree.

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Answer:

there are no provision to head it

Explanation:

because there are no oxygen

The graph depicts how the gravitational drag of an orbiting planet affects a star's orbital speed over time. Based on these measurements, the planet's orbital period is about equal to the wavelengths of spectral lines in the star's spectrum.

Astronomers are able to detect not only the element but also the temperature and density of that element in the star by analyzing the spectral lines. The magnetic field of the star is another thing that the spectral line may shed light on for us. We can determine how quickly the material is traveling based on the breadth of the line. From this, we may learn about the winds that blow in the stars.

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The density of the unknown sample is 0.67 g/ml.

To calculate the density, we use the formula:

Density = Mass / Volume

Mass = 38.00 g

Volume = 56.39 ml

Substituting the values into the formula:

Density = 38.00 g / 56.39 ml

Dividing the mass by the volume, we find:

Density = 0.674 g/ml

Rounding to two decimal places, the density of the unknown sample is 0.67 g/ml.

Density is a measure of how much mass is contained within a given volume. In this case, we are given the mass of the unknown sample as 38.00 g and its volume as 56.39 ml. To find the density, we divide the mass by the volume. By performing the calculation, we obtain a density of 0.674 g/ml.

When rounding the value to two decimal places, the density of the unknown sample is 0.67 g/ml. This means that for every milliliter of the sample, there is 0.67 grams of mass. Density is an important property in chemistry and materials science as it can help identify substances and determine their behavior in various applications.

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To find the average power delivered to the train during its acceleration, we need to use the formula:
Power = Work / Time

First, we need to find the work done on the train during its acceleration. We can use the formula:
Work = Force x distance

The force on the train is equal to its mass times its acceleration:
Force = Mass x Acceleration

Using the given values, we get:
Force = 0.875 kg x (0.720 m/s^2) = 0.63 N

The distance the train travels during its acceleration can be found using the formula:
Distance = (1/2) x Acceleration x Time^2

Plugging in the given values, we get:
Distance = (1/2) x 0.720 m/s^2 x (22.0 x 10^-3 s)^2 = 0.17 m

So the work done on the train during its acceleration is:
Work = 0.63 N x 0.17 m = 0.1071 J

Now we can plug this value into the formula for power:
Power = Work / Time

The time given is 22.0 milliseconds, which is 0.0220 seconds:
Power = 0.1071 J / 0.0220 s = 4.87 W

Therefore, the average power delivered to the train during its acceleration is 4.87 watts.

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Answer: A

Explanation:

The photoelectric effect was first proposed by Einstein. He claimed that when a light wave comes in contact with an electron, it has the ability to strip that electron from its atom. It depends on how much energy the light wave is carrying, and what type of atom the light is hitting. We use the photoelectric effect in garage motion sensors.

Answer:

The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.

Explanation:

Please mark as brainliest

Answer:

Explanation:

atomic mass

Given:

The length of the pipe is L.

The third harmonic has teh wavelength,

To find:

The type of the pipe

Explanation:

The wavelength of the harmonics for a pipe closed at one end is,

The wavelength of the harmonics for a pipe open at both the ends is,

Here,

The given wavelength is,

which resembles the form,

Hence, the pipe is open at the other end.

Answer:

méthode if séparation muddy water

A disk of radius 2m is rotating at a constant rate. It takes 7 seconds for a complete rotation. We need to calculate the speed of the edge of the disc.

We know that the distance traveled by the edge of the disc in one complete rotation = circumference of the disc = 2πr where r = radius of the discNow, r = 2mSo, circumference of the disc = 2π × 2 = 4π mNow, time taken for one complete rotation = 7 secondsTherefore, speed of the edge of the disc = distance traveled ÷ time taken= (circumference of the disc) ÷ (time taken)= 4π ÷ 7 From the given information, we can see that the disk is rotating at a constant rate and takes 7 seconds for a complete rotation. We first calculate the distance traveled by the edge of the disc in one complete rotation, which is equal to the circumference of the disc.

Using the formula for the circumference of a circle, which is 2πr where r is the radius of the disc, we get the circumference to be 2π × 2 = 4π m. Next, we divide the circumference by the time taken for one complete rotation, which is 7 seconds, to get the speed of the edge of the disc. Thus, the speed of the edge of the disc is 4π/7.

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Answer:

I think its D.....

Answer:

A. 2000 m/s

Explanation:

The object must be placed at a distance of 2f/3 from the convex lens to obtain a magnification of -2.

A magnification of -2 indicates that the image formed by the convex lens is two times smaller than the object being viewed and is inverted. This can only be achieved if the object is placed between the focal point and the lens.

To find the distance between the object and the lens, we can use the formula for magnification:

m = -v/u

where m is the magnification, v is the image distance, and u is the object distance.

Since we want a magnification of -2, we can substitute m = -2 and solve for v:

-2 = -v/u

v = 2u

Next, we can use the lens equation to relate the object distance u, the image distance v, and the focal length f:

1/f = 1/u + 1/v

Substituting v = 2u, we get:

1/f = 1/u + 1/2u

Simplifying the right-hand side, we get:

1/f = 3/2u

Solving for u, we get:

u = 2f/3

Therefore, the object must be placed at a distance of 2f/3 from the convex lens to obtain a magnification of -2.

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Answer:

105 seconds

Explanation:

Given,

Speed ( s ) = 7 m/s

Time ( t ) = 15 seconds

To find : Distance ( d ) = ?

Formula : -

d = s x t

d = 7 x 15 = 105 seconds

Answer:

Explanation:

\(\sf \boldsymbol{ \sf Formula } : \\\\ \LARGE\boxed{\boxed{\rm S=V\cdot t }}\)

Where :

Answer: The cost of using the microwave oven for 30 minutes every day for 9 days is $0.57

Explanation: The GRASS method is used to calculate the cost of using an appliance by multiplying the power rating of the appliance (in kW) by the hours of use, and then multiplying that by the rate per kWh.

Here's the calculation:

Power rating: 0.62 kW

Time of use: 30 minutes/day for 9 days = 30/60*9 = 13.5 hours

Cost per hour = 0.62 * 6.8 / 100 = 0.04236

Total cost = 0.04236 * 13.5 = $0.57

1a) The total energy stored when all three weights are raised by 70 cm is 80.5 J.

1b) The height of the tank is 2 m.

2b) The potential energy is converted into kinetic energy when the water flows out of the taps 6.32 m/s.

3a) The mass of water that goes over the falls every second is 1 x 10⁶ kg.

3b) The gravitational potential energy of 1 kg of water at the top of the falls 1000 J.

3c) The speed of the water as it reaches the bottom if all the GPE stored in 1 kg of water is transferred to kinetic energy is 44.72 m/s.

3d) The water will not be falling as fast as the speed calculated in part c suggests because of the presence of air resistance and the fact that the water falls through a medium (air) which offers resistance to its motion.

3e) The energy transferred when the GPE stored in the water falling in one second is transferred to other energy stores is finally stored in thermal energy stores due to the heat generated by the water as it hits the bottom.

1a) To calculate the amount of energy stored in the three weights, we use the formula given below:

E = mgh

Where,E = Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

For the 4.5 kg weight:

E = 4.5 x 10 x 0.7 = 31.5 J

For each of the 3.5 kg weight:

E = 3.5 x 10 x 0.7 = 24.5 J

Thus, the total energy stored when all three weights are raised by 70 cm is:

31.5 J + 24.5 J + 24.5 J = 80.5 J

1b) To calculate how far the 4.5 kg weight must be lifted to store 45 J of energy, we use the formula:

E = mghh = E/mg = 45 / (4.5 x 10) = 1 m2a)

To calculate the gravitational potential energy stored in the water in the tank when it is full, we use the formula given below:

E = mgh

Where,E = Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

The mass of 1 litre of water is 1 kg and the tank can hold 200 litres of water. Therefore, the total mass of water in the tank is:

Mass = 200 kg

The height of the tank is 2 m.

Therefore, the gravitational potential energy stored in the water in the tank is:

E = mgh = 200 x 10 x 2 = 4000 J

Assumptions made in the answer:

We have assumed that the tank is full.

2b) To calculate the speed at which the water would come out of the bathroom and kitchen taps, we use the formula given below:

PE = KEPE = mghKE = 1/2mv²

Where,PE = Potential Energy (Joules)

KE = Kinetic Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

v = Velocity (m/s)

Assuming that the potential energy of the water in the tank is converted into kinetic energy when the water flows out of the taps, the potential energy stored in the water in the tank is given by:

PE = mgh = 200 x 10 x 2 = 4000 J

The potential energy is converted into kinetic energy when the water flows out of the taps.

Therefore, KE = 1/2mv²v² = 2KE/mv² = 2(4000)/200 = 40 m²/s²v = √(40) = 6.32 m/s (speed of the water coming out of the taps)

3a) To calculate the mass of water that goes over the falls every second, we use the formula given below:

Mass = Volume x Density

Where,Volume = 1000 m³/s, Density = 1000 kg/m³, Mass = 1000 x 1000 = 1000000 kg = 1 x 10⁶ kg

3b) To calculate the gravitational potential energy of 1 kg of water at the top of the falls, we use the formula:

E = mgh

Where,m = 1 kg, g = 10 N/kg, h = 100 m, E = 1 x 10 x 100 = 1000 J

3c) To calculate the speed of the water as it reaches the bottom if all the GPE stored in 1 kg of water is transferred to kinetic energy, we use the formula given below:

PE = KEP

E = mgh

KE = 1/2mv²

Where,PE = Potential Energy (Joules)

KE = Kinetic Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

v = Velocity (m/s)

Assuming that all the potential energy is converted into kinetic energy when the water reaches the bottom,

PE = KEKE = mghv² = 2mghv² = 2(1)(10)(100)v² = 2000v = √(2000) = 44.72 m/s

3d) The water will not be falling as fast as the speed calculated in part c suggests because of the presence of air resistance and the fact that the water falls through a medium (air) which offers resistance to its motion.

3e) To calculate the total energy transferred per second as the GPE stored in the water falling in one second is transferred to other energy stores, we use the formula given below:

Power = Energy / Time

Where,Power = 1 x 10⁶ x 10 x 100 = 1 x 10⁹ W = 1 GW (assuming that 1 m³ of water falls every second)3f)

The energy transferred when the GPE stored in the water falling in one second is transferred to other energy stores is finally stored in thermal energy stores due to the heat generated by the water as it hits the bottom.

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Answer:

To convert a millisecond measurement to a second measurement, divide the time by the conversion ratio. The time in seconds is equal to the milliseconds divided by 1,000.

Explanation:

hope it helps

The relatively stable scale degree that often resolves directly to the tonic is the fifth degree. The fifth degree is also known as the dominant scale degree, and it is one of the most essential elements of Western tonal music.

When a composer or songwriter wants to create a sense of resolution in a piece of music, they will often use the dominant chord, which is built on the fifth degree of the scale, to lead back to the tonic chord, which is built on the first degree of the scale. This is known as a V-I cadence, and it is one of the most common and effective ways to create a sense of closure in Western tonal music.In addition to its function as a dominant chord, the fifth scale degree is also used in a variety of other ways in Western music. For example, it is often used as a passing tone, connecting two other scale degrees in a melodic line. It can also be used as a pedal tone, where it is repeated over and over while other parts of the music change around it.Overall, the fifth scale degree is a crucial element of Western tonal music, and its stable and predictable nature makes it an excellent tool for composers and songwriters to use when they want to create a sense of resolution or closure in their music.

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The phenomenon you are referring to is called wave interference. Wave interference occurs when two or more waves travel simultaneously through the same medium and meet up with one another in space.

This phenomenon can be observed in various types of waves, such as sound waves, light waves, and water waves.

There are two main types of wave interference: constructive interference and destructive interference. Constructive interference occurs when the crest of one wave aligns with the crest of another wave, resulting in a wave with a larger amplitude. This causes the waves to effectively "add" together, creating a more intense wave.

On the other hand, destructive interference happens when the crest of one wave aligns with the trough of another wave. In this case, the waves effectively "cancel" each other out, resulting in a wave with a smaller amplitude or even no wave at all.

Wave interference is an important concept in various scientific fields, such as physics, engineering, and acoustics. It helps us understand how waves interact with each other and their surroundings, which in turn enables us to design and develop various technologies and applications that rely on wave phenomena.

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When considering the sum of pressure and energy per unit volume as the diameter of the pipe changes, the correct answer remains constant. Therefore, option c. is correct.

To understand this, let's look at Bernoulli's equation for an ideal fluid in a horizontal pipe:
P + 0.5 * ρ * v² + ρ * g * h = constant

Where:
- P is the pressure
- ρ is the fluid density
- v is the fluid velocity
- g is the gravitational acceleration
- h is the height (which is constant in a horizontal pipe)

In this case, we can disregard the third term (ρ * g * h) because the height is constant in a horizontal pipe. Thus, the equation becomes:
P + 0.5 * ρ * v² = constant

As the diameter of the pipe increases, the cross-sectional area also increases, and the fluid velocity decreases to maintain the same flow rate. This decrease in velocity leads to an increase in pressure.

However, the sum of the pressure and kinetic energy per unit volume remains constant according to Bernoulli's equation.

So, option c. is correct.

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Answer: 2.2 seconds!

Explanation:

The answer is approximately 2.2 seconds.

To find this, we can apply the equations of motion for a rolling sphere on an incline. Since the ball is starting from rest, its initial velocity is 0 m/s. We also know the angle of inclination (15.4°) and the distance the ball must travel (4.4m).

Using the equations of motion, we can solve for the acceleration of the ball, which is given by:

a = g*sin(θ)

where g is the acceleration due to gravity (9.81 m/s2) and θ is the angle of inclination (15.4°).

So, the acceleration of the ball is:

a = 9.81 * sin(15.4°) = 3.15 m/s2

Now we can use the equations of motion to solve for the time it will take for the ball to travel the 4.4m.

The equation for displacement is given by:

x = 1/2 * a * t^2

Where x is the displacement (4.4m in this case), a is the acceleration (3.15 m/s2) and t is the time.

Rearranging the equation to solve for t, we get:

t = sqrt(2x/a)

Substituting in the values for x and a, we get:

t = sqrt(2*4.4/3.15) = 2.2 s

Therefore, it will take the basketball approximately 2.2 seconds to roll 4.4m down the incline.

Answer:

2nd one Force

Explanation:

Without a source of force and object won't have the capability of moving.

Answer:

force

Explanation:

pushing something forward