state any differences between Mass and weight​

Answer:

D. 72.1 m^2

Explanation:

6.01m x 12m = 72.12 m^2

Answer:

mass 3.67 kg, density 600 kg/m3) is fitted

with lead (density 1.14 * 10^4 kg/m3) so that it floats in water with

0.900 of its volume submerged. Find the lead mass if the lead is fitted

to the block’s (a) top and (b) bottom.

Answer:

Equivalent

A conversion factor is a ratio of equivalent measures

Protons can never change for any particular element because they're in the nucleus and the force keeping them there is extremely strong and hard to overcome. Electrons, however, orbit the nucleus and they change all the time. When electrons either leave or join an atom they form ions.

Positive ions (cations) are when electrons leave, so the positive charge is greater than the negative charges, and negative ions (anions) are when electrons join so the negative charge is greater than the positive charge.

hope this helps!

Water rises inside a glass tube with a narrow diameter due to the phenomenon of capillary action.

Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of, or in opposition to, external forces like gravity. In a glass tube with a narrow diameter, the attractive forces between the water molecules (cohesion) are stronger than the attractive forces between the water molecules and the glass surface (adhesion). As a result, the water molecules climb up the walls of the glass tube, creating a concave meniscus and causing the water level to rise.

The height to which water rises in a glass tube is dependent on the diameter of the tube, the surface tension of the liquid, and the angle of contact between the liquid and the tube. The smaller the diameter of the tube, the higher the water will rise due to increased surface tension and greater capillary forces.

Overall, capillary action is a fundamental principle in physics and has practical applications in many fields, including biology, chemistry, and engineering.

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a)

The distance travelled in the first 3 seconds is 6 meters.

b.)

the total distance travelled is 13 meters.

c.)

the acceleration in the time interval from 4 seconds to 7 seconds is 0.67 m/s^2.

distance = speed × time

distance = 2 m/s × 3 s = 6 meters

b)

The distance travelled in the first 3 seconds=  6 meters.

The distance travelled from 3 seconds to 7 seconds, which can be found by finding the area under the trapezium formed by the line joining (3, 2) and (7, 4), the x-axis and the vertical lines at x=3 and x=7.

The height of the trapezium is (4 - 2) m/s = 2 m/s, and the two bases are 4 s - 3 s = 1 s and 7 s - 3 s = 4 s, respectively.

the area of the trapezium is:

area = (1/2) × (1 + 4) s × 2 m/s = 7 meters

The total distance travelled is therefore:

total distance = distance travelled in the first 3 seconds + distance travelled from 3 seconds to 7 seconds

total distance = 6 meters + 7 meters = 13 meters

c)

change in speed = final speed - initial speed

At t=4 s, t speed is 2 m/s,

and at t=7 s,  speed is 4 m/s.

change in speed = 4 m/s - 2 m/s = 2 m/s

The time interval is:

time interval = 7 s - 4 s = 3 s

acceleration = change in speed / time interval

acceleration = 2 m/s / 3 s = 0.67 m/s^2

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Genetic engineering is a field of science that involves manipulating DNA sequences in living organisms. Scientists have made significant strides in this field, which has led to the development of several useful applications. These include the development of new drugs, pest-resistant plants and animals, and modified crop plants.

However, scientists have not used genetic engineering to develop human clones. While there have been attempts to do so, this practice is considered unethical and has been banned in many countries. The development of oil-eating bacteria is also a possibility, but it is still in the experimental stages. Such bacteria could be used to clean up oil spills and prevent environmental damage. Overall, genetic engineering has tremendous potential to revolutionize the field of biotechnology and improve our quality of life. However, it is essential to approach this field with caution and ensure that all experiments and applications are ethical and safe for humans and the environment.

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Answer:

I think the correct answer would be the third option. As the elements around the star begins to emit more and more electromagnetic radiation, the rocky materials are pulled in by the electromagnetic radiation. They are being drawn closer to the star and there would be a very high chance of a nuclear

Explanation:

Answer:

10 meters per seconds or 10m/s

Explanation:

Answer:

0.48N

Explanation:

according to the second law of motion

force=mass×acceleration

the mass in this question is 0.025,the acceleration 19

therefore f=0.025×19

=0.48N

I hope this helps

The net force acting on the book is zero, since the force of gravity pulling down on the book is balanced by the force of the desk pushing up on the book. This means that the book is not experiencing any acceleration or motion, and is in a state of static equilibrium.

Gravity is a fundamental force of nature that exists between any two objects in the universe that have mass. It is the force that attracts all objects with mass towards one another. The strength of the gravitational force depends on the mass of the objects and the distance between them.

The net force acting on the book is zero, since the force of gravity pulling down on the book is balanced by the force of the desk pushing up on the book. This means that the book is not experiencing any acceleration or motion, and is in a state of static equilibrium.

In other words, the book remains stationary on the desk.

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Answer:

In order to minimize the potential energy, they repel each other (in the case of a positive and negative charge, potential energy is minimized by bringing them together, so they attract).

Explanation:

Hope it helps

Two electrons repel when they interact, because they both have similar negative electric charge.

When the two charges or the charged bodies interact each other, the force of attraction or repulsion acts between them. This force of attraction or repulsion can be find out using the coulombs law.

According to the Coulombs law, the force of attraction of repulsion between charged two bodies is directly proportional to the product of charges of them and inversely proportional to the square of distance between them. It can be given as,

\(F=k\dfrac{q_1q_2}{r^2}\)

Here, (k) is the coulombs constant,  (q1 and q2) is the charges of two bodies and (r) is the distance between the two charges.

This force of attraction or repulsion is identified by the sign of the particular charge. According to the property of interacting charges-

As the electrons are negatively charges. Therefore, two electrons repel when they interact, because they both have similar negative electric charge.

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Astronomers use the big bang theory to describe how the cosmos came into being. It is the hypothesis that the universe started out as a single point, then grew and stretched to reach its current size and is still stretching.

The big bang theory contends that the universe has been expanding since its creation in all directions.

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The motion when she is running directly east is Δx = 11.7 and Δy = 15.

To determine the slope of a line select two points on the line and calculate the delta y change in y value to determine the change in elevation. Divide the change in x value by the delta x to determine the change in width. The derivative of y is the square of x with respect to y.

So the derivative of something squared with respect to something is multiplied by the derivative of that thing with respect to x. That's exactly the chain rule. Yes, it means exactly the same. y in Newton notation and dy/dx in Leibniz notation. Newton and Leibniz independently invented calculus at about the same time, so in this case, they used different notations to express the same rate of change.

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The undesirable condition you are referring to is called "islanding" in the context of power systems. Islanding occurs when an interactive inverter.

Typically used in distributed energy resources (such as solar panels or wind turbines), continues to supply power to the utility grid during a utility outage.

In normal operation, an interactive inverter synchronizes its output with the utility grid, matching the grid's voltage and frequency. This synchronization is crucial for safety and stability. However, when a utility outage occurs, the interactive inverter should disconnect from the grid to avoid the risk of energizing lines being worked on by utility personnel.

If an interactive inverter fails to detect the utility outage and continues to supply power to the grid, it creates an "island" within the grid. This island can be dangerous for utility workers repairing the grid, as they may assume the lines are de-energized when, in fact, power is still being supplied.

To prevent islanding, grid-tied inverters are required to have anti-islanding protection mechanisms. These mechanisms continuously monitor the grid's voltage and frequency. If they detect a deviation beyond a certain threshold, indicating a utility outage, they quickly disconnect the inverter from the grid, ceasing power injection.

Islanding protection is essential to ensure the safety of utility workers and prevent damage to the grid. It is an important consideration in the design and operation of distributed energy resources connected to the utility grid.

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Diffraction is the change in a wave's direction as it travels around barriers. Diffraction is observed in both light and sound waves. This means that options 1 and 2 are wrong.

For any opening or slit, waves with longer wavelengths bend more than waves with shorter wavelengths. If the wavelength is smaller than the opening, it would be difficult for diffraction to occur. Thus, the correct option is

It occurs best when the slit width is less than the wavelength of a wave.

Answer:

Angle of refraction is 23° .

Explanation:

\( \frac{ \sin(0w) }{ \sin(0a) } = \frac{n \: a}{n \: w} \)

\( \frac{ \sin(30) }{ \sin \: 0a } = \frac{1.3}{1.0} \)

\( \sin \: 0w \: = \: \frac{ \sin(30) }{1.3} \)

\( = 0.3846153846\)

\( \sin^{ - 1} (0.3846153846\)

\(0w \: = \: 23 ^{o} \)

A thermal energy transfer portfolio would be an excellent way for students to showcase their knowledge and understanding of this important scientific concept.

Thermal energy transfer is the energy transfer between two or more objects that have different temperatures. This energy transfer can take place in three different ways: conduction, convection, and radiation. A portfolio is a collection of documents or pieces of work that demonstrate a person's skills, abilities, and achievements in a particular area.

Therefore, a thermal energy transfer portfolio would be a collection of documents or pieces of work that demonstrate a person's skills, abilities, and achievements related to thermal energy transfer. This portfolio could include lab reports, experimental data, diagrams, and explanations of the various ways thermal energy can be transferred.

For example, a student's thermal energy transfer portfolio might include:

1. A lab report detailing an experiment they conducted to measure the rate of heat transfer through different materials using conduction.

2. A diagram showing the process of heat transfer through convection in a fluid, such as air or water.

3. A written explanation of the concept of radiation and how it relates to thermal energy transfer.

4. A spreadsheet of data showing the temperature changes in a system as heat is transferred through it.

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The launch proyectiles of kinematics  allows to find the maximum initial vertical velocity of the body so that it just reaches the ceiling

             v_{oy} = 2.56 m / s

Given parameters

To find

Projectile launching is an application of kinematics where on the x axis there is no acceleration or and on the y axis the acceleration is the acceleration of gravity (g = 9.8 m / s ^ 2)

In this case, the maximum vertical velocity that the body can have occurs when the velocity on the ceiling is zero.

            v_y² = v_{oy}² - 2 g y

where v and v_{oy} are the initial velocity at the ceiling e initial, respectively, g the acceleration of gravity e and the height

           0 = v_{oy}² - 2 g y

           v_{oy} = \(\sqrt{2gy}\)

           v_{oy} = \(\sqrt{2 \ 9.8 \ 3}\)

           v_{oy} = 2.56 m / s

In conclusion with the kinematic of launch projectiles we can find the maximum initial vertical velocity of the body so that it just reaches the ceiling

             v_{oy} = 2.56 m / s

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The mass of NaNO3 needed to make 4.50 L of a 1.50 M NaNO3 solution is 574 g.

To calculate the mass of NaNO3 needed, we first need to determine the number of moles of NaNO3 required. We can use the formula: moles of solute = Molarity × liters of solution. Given that the molarity is 1.50 M and the volume is 4.50 L, we can calculate the moles of NaNO3 required. To convert moles to grams, we use the molar mass of NaNO3, which is 85.00 g/mol. Multiplying the moles of NaNO3 by its molar mass gives us the mass of NaNO3 needed, which is 574 g.

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The majority of oils have densities that fall within the 700–950 kg/m3 (kg/kg/m3) range. In oils, it is typically stated as +15°C or +20°C, in kilograms per square meter.

Density Definition How closely a material gets packed together is determined by its density. It is described as the mass per volume. Density Symbol: D or Density formula: = m/V, where m is the object's mass and V is its volume.

How compact & concentrated anything is is described by its density. Consider having two boxes, on large and one tiny. They each weigh the same, though. As a result, the small box does have a greater density than the huge box. Additionally, density reveals how crowded or concentrated something is.

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Answer: 0.5334

Explanation:

i got it right on accellus :p

Volume of value V = 0.5333 \(m^{3}\)  is below the water line .

Archimedes' principle states that a body immersed in a fluid is subjected to an upwards force equal to the weight of the displaced fluid.

F(b) = rho*g*V

F(b) = buoyant force

rho = fluid density

g = acceleration due to gravity

V = fluid volume

given

density of raft = 373 kg/\(m^{3}\)

volume of raft = 1.43 \(m^{3}\)

since, density  = mass / volume

mass of raft = density * volume

                    = 373 * 1.43 = 533.3 kg

using Archimedes principal

Force = density of liquid * volume of liquid displaced * acceleration due to                gravity

  mg        = 1000 * V * 9.8

  533.3 * 9.8 = 1000 * V * 9.8

  V = 0.5333 \(m^{3}\)

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The amount of heat or energy that is lost when the water is cooled is 1,024.1 J.

The amount of heat lost is calculated by applying the formula for heat capacity of water as shown below;

Q = mcΔT

where;

The amount of heat or energy that is lost when the water is cooled is calculated as follows;

Q = 3.5 g x 4.18 J/gC x (90 C - 20 C)

Q = 1,024.1 J

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Answer:

Polar bears (Ursus maritimus) are of special interest because of their large size, white color and position as the top-level carnivore in the remote arctic environment. They occur only in the northern hemisphere nearly always in association with sea ice. They have only two colors of fur: tan and white. Polar bears were created to withstand cold temperatures and are quite adaptable. Polar bears are ferocious and the most dangerous of bears. They can lop a person's head off with one swoop of their paw.

Answer:

(200KG)(9.81 m/s^2=1962

1962N/2.5m^2=784.8pa or 7.84.8 N/m^2

Answer:

Nylon is a generic designation for a family of synthetic polymers composed of polyamides.

Explanation:

It is false that the vector u results when a vector u-v is added to the vector v.

The basic definition of the vector it that it is any physical quantity that has a magnitude as well as direction and it follows vector laws of addition. i.e. Parallelogram law of vector addition or triangle law of vector addition.

Now, it is stated that the vector u results when a vector u-v is added to the vector v, this statement may or may not be true because we cannot be certain about it. Because we do not know the direction of the two vectors u and v. This is why we conclude that the statement is false.

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When the curvature radius of a converging lens is increased, the size of the image is reduced.

“The radius of curvature is the radius of sphere formed by the convex or concave mirror.” It is also equal to the distance between the pole and centre of curvature.” The sign convention for focal length and radius of curvature is the same.

“Converging lenses are lenses which converge the light rays coming towards them, whereas diverging lenses are lenses which diverge the rays coming towards them.” A converging lens have positive focal length.

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The moon’s orbit is closer to Earth is the event which occurs during high tide.

This occurs once in a month and is the phenomenon in which the moon is

closest to the Earth. This brings about an increase in the tide levels of the

water bodies.

This is the reason why the option B is the most appropriate option as the

moon’s orbit being closer to Earth also signifies a close proximity between

the moon and the earth

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Answer: The answer is: b) The moon’s orbit is closer to Earth.

Explanation: I have my ways :>

Have a great day!

-Sunny

Answer:

The energy dissipated is 27600 J.

Explanation:

Voltage, V = 230 V

Current, I = 4 A

time, t = 30 s

The energy is given by

E = V I t

E = 230 x 4 x 30

E = 27600 J

The difference between the natural fibers and synthetic fibers is like synthetic fibers are produced using chemicals while, natural fibers are derived from plants and animals and are appreciated in the textile business for several factors.

The fibers that come from natural sources are known as natural fibers. The origins can range from zoological to botanical components. In other words, natural fibers are those that are obtained from plants and animals in their natural state. Wool, silk, hemp, cotton, and linen are a few examples of fabrics that naturally breathe.

Synthetic fibers are produced through a sequence of chemical processes, as their name suggests. These fibers are produced using a variety of chemical compounds rather than being derived from natural sources.

The creation of tiny molecules known as polymers is the process used to create synthetic, artificial, or man-made fibers. In most cases, raw materials and chemical compounds are used to extract polymers. Nylon, polyester, acrylic, and more are a few examples.

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