Answer:
B. Coulomb
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.
A ____ is another name for a group of elements with similar properties
on the periodic table of elements.
Answer:
Family
Explanation:
The groups of elements are called families
What state has the longest coast
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
Explain the energy conversions that take place during combustion?
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
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Below image, please give me the answer quick.
Answer:
Option A. ⅓V
Explanation:
We'll begin by calculating the total resistance in the circuit. This is illustrated below:
R1 = 1Ω
R2 = 2Ω
R3 = 3Ω
RT =..?
Since all three resistor are in series connections, the total resistance can obtain as follow:
RT = R1 + R2 + R3
RT = 1 + 2 + 3
RT = 6Ω
Next we shall determine the current flowing through the circuit.
Voltage (V) = 2V
Resistor (R) = 6Ω
Current (I) =..?
V = IR
2 = I x 6
Divide both side by 6
I = 2/6
I = ⅓A
Finally, we can obtain the voltage across the 1Ω resistor as follow:
Resistor (R) = 1Ω
Current (I) = ⅓A
Voltage (V) =?
V = IR
V = ⅓ × 1
V = ⅓V
Therefore, the potential difference across the 1Ω resistor is ⅓V
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
Which actions are evidence that a chemical reaction has occurred? Select five options. a change in color the formation of a precipitate a clear liquid becoming cloudy a change in shape the formation of bubbles the formation of smoke
Answer:
Explanation:
Answer:
b
Explanation:
I just need a full answer here not only so I can answer the question, but also so that I can learn.
Locate the main groups of elements in each column on the periodic table, and identify the number of valence electrons there are in each element in a particular group. Infer why some elements are more reactive than others due to their number of valence electrons.
Answer: Number of valence electrons determine how fast or easy for an atom to gain stability. Either by gaining electrons or by losing electrons.
Group one and seven elements react fast because they only have one electron to gain or lose.
Explanation:
Number of valence electrons tell us the number of electrons an atom will gain or lose in order to attain stability in electron configuration.
All the elements in a particular group will have the same number of valence electrons as follows:
Group one - 1 valence electron
Group two - 2 valence electrons
Group three - 3 valence electrons
Group four - 4 valence electrons
Group five - 3 valence electrons
Group six - 2 valence electrons
Group seven - 1 valence electron
Group eight - 0 valence electron
Some elements are more reactive than the others because of the electron affinity, oxidation state and electronegativity of the atoms
For instance, elements in group 7 are more reactive than others because of their oxidation state and they have very high electronegativity.
Also, group one elements are more reactive because they only have one electron to loose.
Lasers can be used in
in place of a knife.
Answer: No
Explanation:
Laser can cut many things,
its cutting is so popular largely because of its versatility. Laser cutterscan cut a wide variety of materials – anything from paper, wood, cork, acrylic and foam to different types of metals. Still, there are some materials that would seemingly fit well into this list but should never be cut using a laser cutter.
which types of materials have a molecular structure that makes them good conductors explain how understanding this relationship can help people design more efficient technologies
Answer: Metals
Explanation:
The metals are the conductors of electricity. These are made up of atoms which conducts electricity in the form of electrons in the outer shell that can move freely. These take away the electric charge on the entire metallic system. This way the metal conducts electricity and can also pass electricity to other surfaces if come in their contact. Thus the metals are used for creating equipment of technological importance.
Answer:
Metals
Explanation:
The periodic table is often referred to as the chemists'
______.
Answer:
calendar
Explanation:
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
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 .
select all that apply so it’s not just one answer. please and thanks :))
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.
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
when discussing the earths magnetic field we could say that the earth has a
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:
**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.
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
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
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.
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.
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:
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 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.
PLEASE HELP ME WILL MARK BRAINLIEST
Answer: The answer is b
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: