The earth connection is because the earth connection(third cable) helps to prevent the casing from turning into a live wire.
What are the three cables?It is normal to find that the cable that is used in the pressing iron has three wires that connect to live, neutral and earth. The earth connection is very important in the pressing iron.
The reason why we ought to have the earth connection is because the earth connection helps to prevent the casing from turning into a live wire.
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what piece of equipment on a boat is most important in preventing propeller
the amount of air that can be forcefully exhaled after a normal tidal volume exhalation is called the ________.
Answer:
Expiratory Reserve Volume
Explanation:
A battery-powered lawn mower has a mass of 48.0 kg. If the net external force on
the lawn mower, including both your push and any resistance, is 40.5 N, then what
is the mower's acceleration?
The lawnmower's acceleration is 0.844 meters/sec².
Given to us:
Mass of the lawnmower, m = 48.0 kgs. ,
Net external force, F = 40.5 N,
As we know, a force can change the motion of an object. A force causes an object with mass to change its velocity.
Therefore, when we calculate force, we take force as a net force.
[tex]\bold{ Force= Mass\times (change\ in\ velocity)=Mass\times acceleration}[/tex]
[tex]F = m\times a\\40.5 = 48 \times a\\\\a= \dfrac{40.5}{48} \\\\a= 0.844\ m/sec^2[/tex]
Hence, the lawnmower's acceleration is 0.844 meters/sec².
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imagine you would interview a news Anchor about how they use graphs in presentation of Science in the news think of at least four questions you would ask then imagine how they would answer your question
Answer:
The conventional wisdom of the digital era is that journalists can now know their audiences in far more intimate detail than at any other time in the history of the profession. Previously, journalists based their audience knowledge primarily on their closest social circles. Now, new tools can help them solicit readers’ feedback, analyze and understand readers’ behavior, and open new channels for conversation. These new capabilities promise to shine a light on the abstract audience — making one’s readers present, quantified and real
need an answer asap
if u know physics pls answer the rest of my question!!
i will give brainliest
a] negative charge it's e-
A possible answer to a scientific problem is called a
Answer:
A hypothesis is a possible explanation for a set of observations or an answer to a scientific question. A hypothesis must be testable and measurable.
Explanation:
Answer:
hypothesis is likely tobe the answer, im indian
Help asap please thank you
Which city has the lowest temperature and slowest speed of sound?
a. Baguio
b. Manila
c. Lipa
d. Cagayan
e. Cebu
f. Tagaytay
ITS A a AAA A A a A A A A A A A
Sound wave is an example of ……………………………………. wave.
1.Energy
2.Medium
3.Transverse
4.Longitudinal
Answer:
4
Explanation:
longitudinal
have a beautiful day ahead
HELP!
Electronic signals can travel very long distances in _______ fibers, due to total internal reflection.
optical fibre
[tex] \huge \mathfrak \blue{hope \: it \: helps}[/tex]
which type of energy does a ball falling through the air have?
Answer:
the answer would be kinetic energy
A 70 kg child escapes from a burning building by walking off a roof 30 m above a catching net. Assuming that resistance is a constant 90 N on the child during their fall, calculate the person's velocity just before hitting the net.
Newton's second law and kinematics allow to find the result for the velocity at the point of reaching the child's net is:
v = 23.7 m / s
Newton's second law states that the net force is proportional to the mass and acceleration of the body.
∑ F = m a
Where F is the force, m the mass and the acceleration of the body.
In the attachment we can see a free body diagram of the system, where the positive direction is up.
F -W = m a
Weight is
W = m g
[tex]a = \frac{F}{m} - g[/tex]
Let's calculate
[tex]a= \frac{30}{70} - 9.8[/tex]
a = -9.37 m / s²
Negative indicates downward direction.
Kinematics studies the movement of the body, let's look for speed.
v² = v₀² - 2 a (y-y₀)
Where v is the speed, v₀ is the initial speed, a tha acceleration ang (y-y₀) is the eight.
As the child is released, his initial velocity is zero, upon reaching the floor his height is zero and his initial height is I = 30 m.
[tex]v= \sqrt{2 a y_o}[/tex]
Let's calculate
v = [tex]\sqrt{2 \ 9.37 \ 30}[/tex]
v = 23.7 m / s
In conclusion using Newton's second law and kinematics we can find the velocity at the point where the child reaches the net is:
v = 23.7 m / s
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The velocity of the child before hitting the ground is 22.596 m/s.
The given parameters;
mass of the child, m = 70 kgheight of the roof, h = 30 mair resistance on the child, F = 90 NThe weight of the child acting downwards is calculated as follows;
W = mg
W = 70 x 9.8
W = 686 N
The net force on the child is calculated as follows;
∑Fₙ = 686 N - 90 N
∑Fₙ = 596 N
The acceleration of the child is calculated as follows;
F = ma
[tex]a = \frac{F}{m} \\\\a = \frac{596}{70} \\\\a = 8.51 \ m/s^2[/tex]
The velocity of the child before hitting the ground is calculated as;
v² = u² + 2as
v² = 0 + (2 x 8.51 x 30)
v² = 510.6
v = √510.6
v = 22.596 m/s
Thus, the velocity of the child before hitting the ground is 22.596 m/s.
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The air is 80% Nitrogen, in what form do organisms use nitrogen?
Answer:
Nitrogen in the air
Explanation:
The Earth's atmosphere contains almost 80 % nitrogen gas. It cannot be used in this form by most living organisms until it has been fixed, that is reduced (combined with hydrogen), to ammonia.
Which describes a phase change? (Select all that apply.)
Energy is released or absorbed.
The process is reversible.
The process moves atoms into permanent places.
The compounds transform protons into neutrons.
Answer:
Energy is released or absorbed
The process is reversible
Phase change can be described as:
Energy is released or absorbed.The process is reversible.What is phase change?The physical process of changing a medium's state from one to another is known as a phase transition (or phase change) in the domains of chemistry, thermodynamics, and other related sciences.
The phrase is frequently used to describe transitions between the three fundamental states of matter—solid, liquid, and gas—and, in rare instances, plasma.
The physical characteristics of a phase of a thermodynamic system and the states of matter are constant. Certain properties of a given medium change during a phase transition as a result of a change in the environment, such as temperature or pressure. This change can be discontinuous.
Hence, Phase change can be described as:
Energy is released or absorbed and the process is reversible.
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PLS HELP, 20 POINTS
Which statement accurately describes the motion of the object in the graph above?
A. It moved from 3 cm to 10 cm at a constant speed of 2 cm/s.
B. It moved from 0 cm to 6 cm at an average speed of 1 cm/s.
C. It moved from 0 cm to 10 cm at an average speed of 2 cm/s.
D. It moved from 3 cm to 6 cm at a constant speed of 3 cm/s.
Answer:
A. It moved from 3 cm to 10 cm at a constant speed of 2 cm/s.
Explanation:
Just took the quiz.
It moved from 3 cm to 6 cm at a constant speed of 3 cm/s. This statement accurately describes the motion of the object in the graph above
What is motion of object ?
An object is said to be in motion , if its position changes with respect to its surroundings and time.
A. Object's motion is from 3 cm to 10 cm at a constant speed of 2 cm/s
let us check
time = 7 sec
distance = 10 - 3 = 7 sec
speed = distance / time = 7/7 = 1 m/s
wrong option
B. Object's motion is from 0 cm to 6 cm at an average speed of 1 cm/s.
distance = 6 cm
time = 7.5 sec
speed = 6/7.5 = 0.8 m/s
wrong option
C. Object's motion is from 0 cm to 10 cm at an average speed of 2 cm/s.
distance = 10 cm
time = 9 sec
speed = 10 / 9 = 1.11 m/s
wrong option
D. Object's motion is from 3 cm to 6 cm at a constant speed of 3 cm/s.
distance = 6-3 = 3 cm
time = 7.5 - 6.5 = 1 sec
speed = 3 /1 = 3 m/s
correct option D. It moved from 3 cm to 6 cm at a constant speed of 3 cm/s.
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Quinn accelerates her skateboard along a straight path from 0 m/s to 4.0 m/s
in 2.5 seconds. Calculate the acceleration of the skateboard
[tex]\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{4-0}{2.5}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{4}{2.5}[/tex]
[tex]\\ \sf\longmapsto Acceleration=1.6m/s^2[/tex]
A mango fruit drop from a branch 10m above the ground. Just before hitting the ground the velocity is ?
Answer:
Below
Explanation:
Here are all the values we are given :
dy = 10m
We know that :
a = 9.8 m/s^2 because it is a free falling object
vi = 0 m/s
Here is the formula to find the final velocity :
vf^2 = vi^2 + 2ad
vf^2 = (0)^2 + 2(9.8)(10)
vf^2 = 196
vf = 14 m/s
Therefore the mango's velocity before hitting the ground is 14 m/s
Hope this helps!
what is deltoids muscle?
Answer:
The deltoid muscle is a large triangular shaped muscle associated with the human shoulder girdle, explicitly located in the proximal upper extremity.
Explanation:
Why is Energy not created nor destroyed?
(Need the answer ASAP!!)
Since both heat and work can be measured and quantified, this is the same as saying that any change in the energy of a system must result in a corresponding change in the energy of the surroundings outside the system. In other words, energy cannot be created or destroyed.
The (blank) energy of a baseball can break a window.
1- Kinetic
2- potential
Answer:
kinetic
Explanation:
since it's energy possessed by a moving body/object.
If the mass of an object is 35grams and it takes 7 cm3 of space ,calculate the density
how are wavelength, frequency, and energy related for photons of light?
The wavelength and the frequency of the light are inversely proportional to each other, the multiplication of the wavelength and the frequency of the light is equal to the speed of the light.
What is Wavelength?It can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.
C = λν
As given in the problem we have to find out how are wavelength, frequency, and energy-related to photons of light,
The relationship between the wavelength and the frequency of light is inverse, and the product of the wavelength and the frequency equals the speed of light.
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A car starts from rest and retains the acceleration of 4m/s² in 20 second . calculate its final velocity.
STEP BY STEP
Given : A car starts from rest and retains the acceleration of 4m/s² in 20 second. Calculate its final velocity.
Solution : As we know that a car starts from rest so it's initial velocity should be 0 m/s. Acceleration is 4 m/s² and time taken is 20 sec. So, we need to calculate it's final velocity which we can get it usi g the first equation of motion.
First Equation of Motion : v = u + at
Putting all the required values in the formula we will get v
v = 0 + 4(20) v = 0 + 80 v = 80Henceforth, final velocity is 80 m/sec.
has your doctor ever said that you should only do physical activity? yes or no
No,
Doctor not only advice for physical activity but also for social and mental activities
Answer:
No
Explanation:
Your doctor wouldn't said anyone to do only physical activities.Physical activities is not enough.You should be mentally fit as well as physicallyFor mental fitness you should do mental activities
Fig. 2.1 is a head-on view of an airliner flying at constant speed in a circular horizontal path.
The centre of the circle is to the left of the diagram.
The weight of the airliner is 1.20 x 10^6 N and there is an aerodynamic lift force of
1.39 x 10^6N acting to the left by drawing a scale vector
Ps: ^ to the power of
[tex]1.39[/tex] × [tex]10^{6} N[/tex] acting [tex]30^{o}[/tex] to the left of the vertical.
Constant speed:We refer to an object as traveling at a constant speed when its speed is constant and neither rises nor falls, at a continuous rate.Lift:A force is applied to an object by a fluid flowing around it. The part of this force that is perpendicular to the direction of the incoming flow is called lift. In contrast, the drag force, or portion of the force parallel to the flow direction, is the opposite. Lift typically acts upward to counteract the pull of gravity, but it can also act at an angle to the flow in any direction.The force is referred to as an aerodynamic force if the fluid is air.It is known as a hydrodynamic force in water or any other liquid.Solution -The weight of the airliner is [tex]1.20[/tex] × [tex]10^{6} N[/tex] and there is an aerodynamic lift force of [tex]1.39[/tex] × [tex]10^{6} N[/tex] acting [tex]30^{o}[/tex] to the left of the vertical.
Therefore, the airliner follows this circular path while maintaining a steady speed.
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what process is a form of mechanical weathering ?
Answer: abrasion-is the physical process by which rocks and clasts are reduced in size
Explanation: but i didn't see any answer chooses
Drag the correct object from the left to the statement that goes with it at the right. Use each choice only once. ResetHelp generates energy deep in its core through the fusion of hydrogen into helium has a single moon that is surprisingly large compared to its planet. is orbited by at least two geologically active moons: Titan and Enceladus. has a large moon, Triton, that almost certainly once orbited the Sun independently. has a surface hot enough to melt lead as a result of an extremely strong greenhouse effect. has an axis tilt that gives it very extreme seasons. was studied up close in 2015 by the New Horizons spacecraft. has no surface liquid water today, but shows clear evidence of such water in the distant past. has a famous storm known as the Great Red Spot. is similar in size to Pluto and also considered a dwarf planet. has a greater difference in temperature between its day and night sides than any other world.
The solar system is bounded together by gravity, and is made up of the Sun eight planets and dwarf planets
The correct options are;
The Sun ⇒ generates energy deep in its core through the fusion of hydrogen and into heliumEarth ⇒ has a single moon that is surprisingly large compared to its planetSaturn ⇒ is orbited by at least two geologically active moons: Titan and EnceladusNeptune ⇒ has a large moon, Triton, that almost certainly once orbited the Sun independentlyVenus ⇒ has a surface hot enough to melt led as a result of extremely strong greenhouse effectUranus ⇒ has an axis tilt that gives it very extreme seasonsPluto ⇒ was studied up close in 2015 by the New Horizons spacecraft.Mars ⇒has no surface liquid water today, but shows clear evidence of such water in the distant pastJupiter ⇒ has a famous storm known as the Great Red SpotEris ⇒ is similar in size to Pluto and also considered a dwarf planetMercury ⇒ has a greater difference in temperature between its day and night sides than any other worldReasons:
The Sun generates energy by nuclear fusion in its cores
The size of the Moon more than a quarter of the Earth's size
Saturn moon Titan shows signs of volcanic activity
The moon Triton rotates in the opposite direction to the rotation of Neptune
Venus is the second closest planet to the Sun with a thick CO₂ atmosphere, resulting in a greenhouse effect that makes the planet 510°C hotter
Uranus has seasons that last for approximately 20 years
The New Horizons spacecraft took 9.5 years to reach Pluto after the mission was launched in 2006
Mars liquid water disappeared billions of years ago
The Great Red Spot storm has lasted for over 300 year
Eris, one of the largest dwarf planets and is further from the Sun than Pluto
The difference in temperature between the day and night sides of Mercury is 427°C - (-180°C) ≈ 607°C
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When a 10V battery is connected to a resistor, 2A of current flows in the resistor.What is the resistors value? Formulas: V=IR, I=V/R, R=V/INote no need to write the unit in your answer.help im dying
Answer:
V = 10
I = 2
R = ?
from,
R = V/I
R = 10/2 = 5 ohms.
P.S; don't die. :))
A box is being pushed at constant speed up an inclined
Answer:
ok what is the question
Explanation:
I don't know what the question is
Select all that apply.
The spectrum of Star S is compared to a reference hydrogen spectrum. What can be concluded about Star S?
Star S is moving away from Earth.
Star S is moving toward Earth.
Star S has transverse motion.
Star S has radial motion.
Answer:
Star S has radial motion
Explanation:
Because the radial motion stracture is kinda similar to hydrogen spectrum(I'm guessing,only lol)
The spectrum of Star S is compared to a reference hydrogen spectrum. It is concluded that Star S has transverse motion.
What is hydrogen spectrum?Hydrogen spectrum is used to show the quantized electronic structure of an atom.
If Star S is not showing radial motion. So, it is not moving away or towards the Earth.
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