Why do we use sharp pointed needle while stiching cloths ? physic​

Answers

Answer 1

Answer:

Explanation:

A blunt needle won't get the job done as it won't pass through the fabric well


Related Questions

A compass works because its magnetic needle
a. contain atoms
b. contain charged particles
c. repels magnet
d. spins freely

Answers

Answer :

D) spins freely

Answer

c. repels magnet

A hydrogen atom has a diameter of about 12.7 nm, express this diameter in centimeters.

Answers

1 meter = 1e9 nm
To get meters, divide nanometers by 1e9: 9.95nm / 1x10^9 = 9.95x10^-9 meters
Answer: 9.95e-9 meters

We have to convert 12.7nm to cm

[tex]\\ \sf\longmapsto 12.7nm[/tex]

[tex]\\ \sf\longmapsto 12.7\times 10^{-9}m[/tex]

[tex]\\ \sf\longmapsto 0.127\times 10^{-7}m[/tex]

[tex]\\ \sf\longmapsto 0.00000127\times 10^{-2}[/tex]

[tex]\\ \sf\longmapsto 0.0000013cm[/tex]

a skateboarder fell doing a jump. she got up and after 5 seconds, returned to a velocity of 5m/s. what is her acceleration

Answers

Acceleration= Velocity/time
Acceleration=5m/s\5s
Acceleration=1m/s2

if you have 75 hectograms it is the same as how many centigrams?

Answers

Answer:

As we know 1 hc = 10000cg

now,

75hg=(75×10000)cg750000cg

hope it helps.stay safe healthy and happy.
10000cg hope it helps.

Why is sound not a example of matter

Answers

Answer:

Because it doesn`t take space or have weight

It also can`t be considered a medium for these reasons

At dinner, Hans passed the salt shaker to his sister Jessica by sliding it across the wooden table. The salt shaker gradually slowed down and stopped after moving 12 centimeters.
Why did the salt shaker stop moving?

Answers

Answer:

the salt shaker stop moving is because of heavy centimeters

Lois Price came up with a brilliant idea of creating a 1,500m perfectly circular track. In order to do so she wanted
to know her distance and displacement at four different locations. Starting at the TOP of the circle, what are her
distance and displacement if she travels... (HINT - Remember the circumference of a circle)
a. quarter way around the track
Isoo
b. half way around the track
4
Р A
C. 4 around the track
d. an entire lap
dist = 375

Answers

Her distances and displacement are;

[tex]\begin{array}{|l|c|c|}\mathbf{Location}&\mathbf{Displacement}&\mathbf{Distance}\\&&\\a. \ Quarter \ way \ around&\dfrac{750 \cdot \sqrt{2} }{\pi} m &375 \ m\\&&\\b. \ Half \ way \ around&\dfrac{1500}{\pi} m&750 \ m\\&& \\C. \ Three \ quarter\ way \ around&\dfrac{750 \cdot \sqrt{2} }{\pi} m&1,125 \ m\\&&\\d. \ Entire \ lap&0&1,500 \ m\\\end{array}\right][/tex]

The reason the above values are correct are as follows:

The known details are:

The length of the circular track, C = 1,500 m

The required details;

Her distance and displacement at four locations starting at the top of the circle, as follows;

At the top, the starting point, the displacement = The distance = 0

a. A quarter way round the track;

The radius of the circular track, r = C/(2·π)

∴ r₁ = 1,500 m/(2·π) = (750 m)/π

The displacement a quarter way round the track, s₁² = r² + r²

∴ s₁² = ((750 m)/π)² + ((750 m)/π)²

s₁ = ((750 m)/π)·√2

The displacement a quarter way round the track, s₁ = ((750·√2)/π) m

The distance a quarter way round the track, d₁ = C/4

∴ d₁ = 1,500 m/4 = 375 m

The distance a quarter way round the track, d₁ = 375 m

b. The displacement half way around the track, s₂ = r + r

∴ s₂ = r + r = (750 m)/π + (750 m)/π = (1,500 m)/π

The distance moved half way round the circular track, d₂ = C/2

∴ d₂ = 1,500 m/2 = 750 m

The distance moved half way round the circular track, d₂ = 750 m

C. The displacement 3/4 way round the track, s₃ = s₁ = (750 m)/π)·√2

The distance moved 3/4 way round the circular track, d₃ = (3/4) × 1,500 m = 1,125 m

D. The displacement for an entire lap, which is back to starting point at the TOP, s₄ = 0

The distance traveled in one lap = The circumference of the track, C = 1,500 m

Therefore, we have the following displacement and distances at the four different locations;

[tex]\begin{array}{|l|c|c|}\mathbf{Location}&\mathbf{Displacement}&\mathbf{Distance}\\&&\\a. \ Quarter \ way \ around&\dfrac{750 \cdot \sqrt{2} }{\pi} m &375 \ m\\&&\\b. \ Half \ way \ around&\dfrac{1500}{\pi} m&750 \ m\\&& \\C. \ Three \ quarter\ way \ around&\dfrac{750 \cdot \sqrt{2} }{\pi} m&1,125 \ m\\&&\\d. \ Entire \ lap&0&1,500 \ m\\\end{array}\right][/tex]

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what is meant by rusting​

Answers

Answer:

The formation of reddish brown ferric oxide on iron by low temperature oxidation in the presence of water .

make me as brilliant answer

5. How much does a 20 m x 10 m x 8 m swimming pool filled with water weigh? Assume that water has a density of 62 kg/m².​

Answers

Answer:

fxhehjejejkwkwkkwkwkqklwkjsnenrnkeke

Answer:

99,200kg

Explanation:

density= mass/volume

given d-62kg/m*3

v=20×10×8. =1600

m=x

1600×62=99,200kg

Make a Table Organize the following measurements from smallest to largest and
include the multiplying factor for each: kilometer, nanometer, centimeter, meter, and
micrometer.

Answers

We have that the Table for the Factors is

              [tex]\begin{center}\begin{tabular}{ |c|c|c| } Mesurements & Multiplying factor \\ Nanometer& 10^{-9} \\ Centimeter& 10^{-2} \\ Micrometer& 10^{-3} \\ Meter& 10^{1} \\ Kilometer& 10^{3} \\ \end{tabular}\end{center}[/tex]

From the Question we are told to

Organize the following measurements from smallest to largest

Kilometer,NanometerCentimeter Meter Micrometer.

Note that we Determine the multiplying factor by using Metre which is the SI unit of length as the bases

                        [tex]\begin{center}\begin{tabular}{ |c|c|c| } Mesurements & Multiplying factor \\ Nanometer& 10^{-9} \\ Centimeter& 10^{-2} \\ Micrometer& 10^{-3} \\ Meter& 10^{1} \\ Kilometer& 10^{3} \\ \end{tabular}\end{center}[/tex]

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how energy from food can be used to make a flashlight shine?

Answers

Answer:

a toaster

Explanation:

Energy from food can be used to make a flashlight shine by converting it into electrical energy.

When we eat food, our bodies break down the food into glucose. Glucose is a type of sugar that our bodies can use for energy. When glucose is broken down, it releases energy. This energy is used to power our cells and to do work.

One of the things that our bodies can do with energy is to convert it into electrical energy. This electrical energy can be used to power devices, such as flashlights. In a flashlight, the electrical energy from food is converted into light by a process called incandescent lighting. Incandescent lighting works by heating a filament until it glows. The filament is made of a material that gives off light when it is heated.

The electrical energy that powers the filament comes from a battery. The battery is charged by the energy from food. When we turn on the flashlight, the battery sends electrical energy to the filament. The filament heats up and glows, creating light.

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5. How much does a 20 m x 10 m x 8 m swimming pool filled with water weigh? Assume that water has a density of 62 kg/m'.​

Answers

Explanation:

First of all we calculate the volume which is 20m×10m×8m= 1600m^3 and then multiply the density by the volume to get the mass which will equal to 99200kg therefore the weight will be

Weight

mass × acceleration due to gravity

=99200kg × 10m^s^2

=992000N

If you wanted to know the location of a vehicle that ran out of gas after taking a zigzag route through the city, which quantity would be
most useful?

a. the vehicle's speed

b. the vehicle's distance

c. the vehicle's direction

d. the vehicle's displacement

Answers

Explanation:

the vehicles displacement, since displacement deals with position

To know the location of a vehicle that ran out of gas after taking a zigzag route through the city, the quantity that would be  most useful is the vehicle's displacement.

In physics, the term quantity refers to something that can be measured.

Displacement is a vector quantity. Displacement simply means distance covered in a specified direction.

Notice that we want to find out the location of the vehicle after it ran out of gas. In this case, we don't only need to know the distance covered by the vehicle but also the direction in which the distance was covered in order to enable us to track the vehicle.

Hence, we need to find out the vehicle's displacement.

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A machine has mechanical advantage,what does it mean? ​

Answers

Answer:

In machines that transmit only mechanical energy, the ratio of the force exerted by the machine to the force applied to the machine is known as mechanical advantage. Under mechanical advantage the distance the load will be moved will be only be a fraction of the distance through which the effort is applied.

A student doing an experiment spilled some salt and sugar into the sink. How should these substances be cleaned up?

Answers

Answer:

I guess rinse it out and wipe it up. It's not a hazardous substance so there's nothing to worry about.

These substances should be cleaned up rinsing the area or removing the compounds with a cloth and dispose of it in the trash.

Sugar is a chemical compound also called sucrose. Its chemical formula is C12H22O11. This compound is normally used to sweeten foods.

On the other hand, common salt is a chemical compound. Its chemical formula is NaCl. This compound is normally used to give food a salty taste.

According to the above, in which a student spilled some salt and sugar in the sink and does not know how to clean it, it can be concluded that the proper way to clean these chemical compounds is by rinsing the area or removing the compounds with a cloth and dispose of it in the trash because neither of them represents biological, chemical or physical risks and a specialized treatment is not required for them.

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4 facts about relative dating?

Answers

Relative dating is used to arrange geological events….

Relative dating puts geologic events in chronological order without requiring that a specific numerical age be assigned to each event….

Relative Dating uses the half life of isotopes to get the exact age of a rock or mineral.

10. Scientists try to develop an explanation for what
they see happening in the natural world. What
must be true of any explanation they develop?

A. It must be supported by evidence.

B. It can never be changed.

C. It must be shown to have practical value for
humans.

D. It must be based on information that other
scientists have also gathered.

Answers

Answer:

it must be based on information that other scientists have also gathered

Answer:

hope its ok

Explanation:

 

Science is a way of learning about what is in the natural world, how the natural world works, and how the natural world got to be the way it is. It is not simply a collection of facts; rather it is a path to understanding.so it should contain a logical theory but it can also never be said as the final answer.

so A) OR D) both are correct

Newton's Law of Inertia states that ________.

Answers

Answer:                                                                                                                     It states that an object in motion will stay in motion, and an object at rest will stay at rest unless acted upon by an unbalanced force.

Explanation:

hope i helped

Answer: A object that is currently in motion will stay at motion. The law of interia is also known as Newton's first law of motion.

Explanation:

1.How many significant digits are in 101,407,063?

Answers

Answer:

= 9

Explanation:

just count the numbers :D

What is somethings important in mental health

Answers

Answer:

Some of the things that are important in mental health is how it affects us in how we think, Also How we feel, and act.

Explanation:

Mental health includes our emotional, psychological, and social well-being. It affects how we think, feel, and act. It also helps determine how we handle stress, relate to others, and make healthy choices. 

1. Mental health is important at every stage of life, from childhood and adolescence through adulthood.

what is gravitational constant?also write it's si unit​

Answers

Answer:

its the constant in Newton's law of gravitation that yields the attractive force between two bodies when multiplied by the product of the masses of the two bodies and divided by the square of the distance between them

6.67408 × 10-11 m3 kg-1 s-2

hope this helps

a person walks 20 steps forward and 20 backward and converse a distance of 40 steps while his displacement is zero .why?

Answers

Answer:

he walked 20 forward and back so he ended at the same spot but still walked 40 steps by going forward and back

a) If the mass of the car is doubled (by adding passengers and cargo) by what factor must the
force change so the car can make the turn? (2 pts)

Answers

Let Mass be m

F=ma

If its doubled then

[tex]\\ \sf\longmapsto F=2ma[/tex]

Hence force also needs to be doubled.

help me please i dont understand

Answers

The choose C. 1.33

Tanθ =opposite / adjacent

Tanθ =20/15

Tanθ =1.33

I hope I helped you^_^

Grop 17 of the periodic table contains the ?

Answers

Group 17 is the second column from the right in the periodic table and contains six elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (As), and (Ts). Astatine and are radioactive elements with very short half-lives and thus do not occur naturally.

You ride your skateboard to school and tell all your friends your rode at speed of 25 miles per hour. They know this cannot be true because they know

when you left the house and when you arrived at school
how far school is from your house and what time school starts
the distance between your house and school and how long it took you to get there
the distance between school and your house and the direction you traveled

Answers

Answer:

The correct answer is "The distance between your house and your school, and how long it took you to get there." This is the proper answer choice because mph is miles per hour. Meaning you can travel 25 miles in just one hour. Speed in such form is used for measuring distance, or time. Hope it helped.

Explanation:

A car start from rest and reached with a speed of 20m/s in 9seconds calculate the acceleration of the car and calculate the displacement covered in this time ​

Answers

Hi there!

Acceleration:

a = Δv / Δt, so:

a = 20/9 ≈ 2.22 m/s²

Displacement:

We can use the equation Δd = v₀t + 1/2at² to solve. (Initial velocity is 0).

Δd = 1/2at²

Plug in the acceleration and time:

Δd = 1/2(2.22)(9)² ≈ 89.91 m

A bus is moving with a speed of 72 km/hr.If the driver applies brake and stops the bus in 4 seconds,what distance does the bus travel before stopping?​

Answers

Answer:

The distance is 40m

Explanation:

hopefully the picture is visible and understandable

:)

7. Our state of mind affects how we observe our surroundings. What
mental state is the best for observing?
I
a) happy
c) nervous
b) relaxed d) excited

Answers

It has to be C Nervous

what do you mean by Spin quantum number?​

Answers

Answer:

In atomic physics, the spin quantum number is a quantum number (designated ms) which describes the intrinsic angular momentum (or spin angular momentum, or simply spin) of an electron or other particle.

Hello!

The answer is:

Spin Quantum Number: In atomic physics, the spin quantum number is a quantum number (designated ms) which describes the intrinsic angular momentum (or spin angular momentum, or simply spin) of an electron or other particle.

Hope it help you
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