Answer:
The answer is A. They are temporary magnets, so they can be turned on or off.
Explanation:
An Electromagnet consist of a soft ion core in a current carrying solenoid that is wound in opposite direction round the two arms of a bar.
They are temporary magnets and they loose their magnetic property the moment they are turned off.
Answer:
A. They are temporary magnets, so they can be turned on or off.
Explanation:
The periodic table is often referred to as the chemists'
______.
Answer:
calendar
Explanation:
A positively charged spherical object is placed equidistant between two other identical uncharged spherical objects. How would the charges in the middle sphere be distributed?
Answer: The charge in the middle sphere will be distributed by induction.
Explanation: The charge in the middle sphere will be distributed through induction. The ends of the two uncharged bodies develop same charges and mutual attraction occurs. The positive charged body pushes the positive charged of the two uncharged bodies farther away and attracts the negative electrons in them.
how does the weight of a paper airplane affect the distance it will travel
The larger the paper airplane the more it will weigh, the more it weighs the more lift will be needed to keep it flying. Eventually weight will become greater than lift and the paper airplane will decend to the ground. In adition the larger the paper airplane the larger its wings can be.
**PLEASE QUICKLY **A circuit has a resistance of 250 and is powered by a 120 V battery
The current in the circuit, to the nearest tenth, is
____А.
Answer:
Current, I = 0.48 A
Explanation:
We have,
Resistance of a circuit is 250 ohms
Voltage of the battery is 120 V
It is required to find the current flowing in the circuit. Let I is the electric current. Ohm's law is given by :
[tex]V=IR\\\\I=\dfrac{V}{R}\\\\I=\dfrac{120}{250}\\\\I=0.48\ A[/tex]
So, the current in the circuit is 0.48 A.
А_is an area of land that rises very high above the land around it.
lake
mountain
plain
Oriver
Answer:
A mountain is classified as landform that raises at least 1,000 feet or more above its surroundings areas of land.
Cells Building Blocks of Living Things
Explain the energy conversions that take place during combustion?
A sound wave traveling at STP has a period of .0023 seconds. The wavelength of this sound is closest to
1)1.4E5
2)6.9E-6
3)0.76m
4)76m
Answer: 3
Wavelength = 0.76m
Explanation:
When sound wave is travelling at standard temperature and pressure ( STP), its speed will be equal to normal speed of sound which is equal to 331 m/s
Given that the period of the wave is 0.0023 seconds.
Wave speed = wavelength/period
Substitute the wave speed and the period to obtain wavelength
331 = wavelength/0.0023
Cross multiply
Wavelength = 331 × 0.0023
Wavelength = 0.7613 metre
The wavelength of this sound is closest to 0.76 m
Current electricity is _____________________.
build-up of electric charge
a flow of electric charge
the push in a simple circuit
a positive charge
Answer: a flow of electric charge
Explanation:
A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw
based on this description?
The electric field points to the left because the force on a negative charge is opposite to the direction of the field.
The electric field points to the right because the force on a negative charge is in the same direction as the field
O No conclusion can be drawn because the sign of the charge creating the field is unknown
O No conclusion can be drawn because the amount of charge on the test charge is unknown
Answer:
The correct option is (A).
Explanation:
The direction of electric force is in the direction of electric field. The electric force acting on a charged particle is given by :
F = qE, q is magnitude of charge
We have, a negative test charge experiences a force to the right as a result of an electric field. It would mean that the electric field points to the left because the force on a negative charge is opposite to the direction of the field.
I NEED THIS ASAP
What does the satellite image below represent?
Which of the following values are in the domain of the function graphed
below? Check all that apply.
Answer:
7, 3, 2, 0 are in the domain of the function.
Explanation:
sorry if i'm wrong
Can any one please help
Answer:
1. A) lamb
candle
torch
sun
B) the stars
light bulb
Toxic Glow-in-the-Dark Millipedes
C) no, humans are not luminous objects
D) on a sunny day the light from the sun hits us and then the light gets reflected to the friends eyes and that is how they can see us.
Explanation:
What state has the longest coast
1) Johnny completing the spring lab, and makes 12 waves in 10 seconds. What is the
frequency of the waves Johnny makes?
Answer:
1.2 Hz
Explanation:
Frequency: This can be defined as the number of cycles completed in one seconds. The unit of frequency is Hertz (Hz)
From the question above,
f = N/t.................... Equation 1
Where f = frequency, N = number of wave or cycle completed by Johnny, t = time take to complete the waves.
Given: N = 12 waves, t = 10 s
Substitute into equation 1
f = 12/10
f = 1.2 Hz
Which type of energy increases when an object's atoms move faster?
A thermal
B chemical
C nuclear
D mechanical
Answer:
thermal
Explanation:
when an object's atoms move it causes friction, when friction happens, it heats ups causing thermal energy
Answer:
Thermal
Explanation:
you have to use friction to make thermal energy that's why when you rub your hands together it gets hotter and hotter. When you are playing tug of war and you get a rope burn it is because your hand is getting in contact with the rope that is slipping out of your hand
PLS CORRECT ME IF IM WRONG
A scientist places a strip of hot metal on top of a block of another metal with a lower melting point. The second metal quickly melts. What is the main type of heat transfer responsible?
Select one:
a. Convection, because the metals touch and cold from the block moves to the warmer strip of metal, cooling it down
b. Conduction, because both metals are in the sun and melt as the sun's rays heat them
c. Convection, because heat from the strip of metal heats the air around it, and then that warm air heats the metal block
d. Conduction, because the heat energy is absorbed by the metal atoms in the block. Once they have absorbed enough energy, they become liquid
Answer:
D:
Explanation:
Conduction because the heat energy is transferring directly from the separate metals convection involves "currents" like in a liquid or a gas. When you turn on the stove with a pot of water on the burner the water at the bottom of the pot gets heated first almost immediately this water rises and cooler water falls. Basically the water is "stirring" or shifting, exchanging the heat energy this is why water heats so evenly.
Answer:
D
Explanation:
The heat transfer that we'll have will be:
- At first, the metal bar will emanate heat through radiation, to the atmosphere, and to the second metal, through conduction.
- Because of this, the second bar will start to increase it's temperature, up to the fusion point, spending the energy received on the fusion, and also radiating heat to the atmosphere. It won't emit heat in any other form, since heat transmission can happen only from a hot body to a cooler one, and the only things in contact are the two bars.
list possible causes of fever and explain the benefits of fever
Answer:
Fever or elevated body temperature might be caused by:
A virus.
A bacterial infection.
Heat exhaustion.
Certain inflammatory conditions such as rheumatoid arthritis — inflammation of the lining of your joints (synovium)
A malignant tumor.
Many illness-causing microbes do best at the body's normal temperature. A fever raises the temperature beyond which certain microbes need to reproduce. A fever also kicks your child's immune system into high gear, spurring the rapid production of bug-clobbering white blood cells.
Explanation:
google lol
Four springs are stretched to the same distance from the equilibrium position. The spring constants are listed in the table. A 2 column table with 4 rows. The first column is labeled spring with entries W, X, Y, Z. The second column is labeled spring constant in newtons per meter with entries 24, 35, 22, 15. Which lists the springs based on the amount of elastic potential energy, from greatest to least?
Answer:
X,W,Y,Z
Explanation:
It is what it is. and i took the edge test
Answer:
or b on edge 2021
Explanation:
PLEASE HELP ME WILL MARK BRAINLIEST
Answer: The answer is b
The diagram shows the field lines near the poles, X and Y,
of two magnets
Based on the field lines, what are the poles of the
magnets?
O X: north
Y south
X: south
Y north
X north
Y north
Х
Y
X south
Y south
Answer:
The answer is C. X:north Y: north
Explanation:
Just took the test
Based on the field lines poles of the magnets X=North and Y=south
What are the poles of X and Y?Every magnet has the two poles that is north and the south. similarly earth also have two poles north and south and acts as a magnet.
just from that concepts the filed lines near the poles X and Y of the two magnets have north poles.
Hence based on the field lines poles of the magnets X=North and Y=south
To know more about Magnet and magnetic field follow
https://brainly.com/question/14411049
A guitar string is 0.620m long, and oscillates at 234Hz. What is the velocity of the waves in the string? m/s
Answer:
v = 72.54 m/s
Explanation:
We have,
Length of a guitar string is 0.62 m
Frequency of a guitar string is 234 Hz
For guitar string,
[tex]L=2\lambda\\\\\lambda=\dfrac{L}{2}\\\\\lambda=\dfrac{0.62}{2}\\\\\lambda=0.31\ m[/tex]
The velocity of the wave in the string is given by :
[tex]v=f\lambda\\\\v=234\times 0.31\\\\v=72.54\ m/s[/tex]
So, the velocity of the waves in the string is 72.54 m/s.
Answer:
290.16
Explanation:
i got it right
For example, imagine that your little sister wants to move her bed from one corner of the room to the other. She gives the bed a light push, but the bed does not move. She gives it a stronger push, but it still does not move. She gives it her strongest push, and still nothing happens. She calls you for help. Only when both of you push together as hard as you can does the bed finally start to move. Why? Why did the bed not move when your sister pushed it by herself? What kept it from moving?
Answer:
When the sister pushed the bed by herself, she could not move it at all because of gravity and the weight of the bed. Due to the beds mass it prevented the sister from pushing the bed, but since she received help from her brother, their strengths combined to be able to push the bed
Please please please please PLEASE help!!!
Brainliest for whoever gets this right!
Describe how an earth wire and a fuse can protect an iPad with a metal casing
- 5 clear simple points
Answer: Find the answer in the explanation
Explanation:
The earth wire act as a protective conductor in which current flows to the earth. Whenever there is a faulty flow of current, the earth wire will protect an iPad with a metal casing from letting you get shocked by allowing the faulty current to flow directly to the earth.
With the use of fuse, the wire break when it detects a faulty flow of current and the device will automatically switch off because of break in circuit.
These are to protect you from electric shock from the iPad metal casing.
Please help me whit this question
Answer:
Gypsum
Explanation:
Gypsum is a soft sulfate mineral composed of Calcium Sulfate di-hydrate. It is widely used in composition of fertilizer. It is also known as land plaster. On adding gypsum to soil, the quality of soil is improved. It conditions the soil and adds nutrients. The properties of soil is improved. Hence, the correct answer is Gypsum.
Hope this helped:)
pls mark brainlist
What is the mass number of the missing daughter nuclei?
Answer:
90
Explanation:
The mass number of the missing daughter nuclei can be obtained as shown in the attached photo.
Answer: 90
Explanation:
To calculate the mass number of the missing daughter nuclei, the equation must be balanced.
The sum of the mass number in the left hand side = 1 + 235 = 236
The sum of mass number in the right hand side must be equal to 236.
Then, 236 - (143 + 3×1)
236 - ( 143 + 3)
236 - 146 = 90
HELP ASAP!!
A 41kg girl sits on the edge of a merry-go-round. If she travels
at 0.02ms and the radius of her motion is 2.1m, what is the centripetal force acting upon her?
Answer:
Centripetal force F = 0.0078 N
Explanation: Given that the
Mass M = 41 kg
Velocity V = 0.02 m/s
Radius r = 2.1 m
Centripetal force F = MV^2/r
Substitutes all the parameters into the formula
F = (41 × 0.02^2)/2.1
F = ( 41 × 0.0004 )/2.1
F = 0.0164/2.1
F = 0.0078 N
The centripetal force acting upon her is 0.0078 Newton
Given uranium 235 go through an alpha, beta, beta, alpha, gamma, neutron and alpha. What do you have now?
a. 92, 231
b. 88, 222
c. 88, 220
d. 90, 222
Answer:
b. 88, 222
Explanation:
235U₉₂ ----→ Alpha --------→ 231P₉₀ ----→- beta -----→ 231Q₉₁ ------→-beta -------→231R₉₂--------→-alpha ------→-227S₉₀ ------→ gamma -----→-227S₉₀ ----------→ neutron ------→-226T₉₀-----------→ alpha --------→222 X ₈₈
Atomic No is 88 , atomic weight = 222 .
DISCUSS THE PROCESS OF MAKING SILAGE.
Answer:
Silage can be made by one or more of the following methods: placing cut green vegetation in a silo or pit; piling the vegetation in a large heap and compressing it down so as to purge as much oxygen as possible, then covering it with a plastic sheet; or by wrapping large round bales tightly in plastic film.
Explanation:
5. While working near flammable
substances, one should avoid iron or steel
hand tools.
O (A) True
O (B) False
Answer:
true
Explanation:
iron or steel tools can be dangerous ignition source
Answer:
(A) True...
Explanation: