Answer:
-magnesium and silicon
Explanation:
The two elements that will most likely form an ionic bond are magnesium and silicon. The correct option is b.
What are ionic bonds?Ionic bonds are defined as those that are created when all of an atom's electrons completely transfer to another atom. Ionic compounds are those that contain ionic bonding.
The atom losing electrons in this bond formation is referred to as an electromotive atom, while the atom acquiring electrons is referred to as an electronegative atom.
In these compounds, ions with opposing charges are drawn to one another and combine to form a compound. Magnesium and silicon form a crystalline compound that is black, and these elements can form ionic bonds. The formula of magnesium and silicon is MgO₃Si
Therefore, the correct option is b, magnesium, and silicon.
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If the current at a certain point is 2.0 A, then _______ C of charge flow past that point in 10 seconds.
6 points
5 C
20 C
12 C
0.2 C
Final answer:
If the current at a certain point is 2.0 A, then 20 C of charge flow past that point in 10 seconds, as current is the flow of charge per unit time.
Explanation:
The solution goes as follows: If the current at a certain point is 2.0 A, then the amount of charge that flows past that point in 10 seconds can be calculated using the relationship between current (I), charge (Q), and time (t), which is given by the formula I = Q/t. Therefore, to find the charge, Q, we rearrange the formula to Q = It. Plugging in the given values, we get Q = 2.0 A × 10 s = 20 C. This means that 20 coulombs of charge flow past the point in 10 seconds.
If you were doing a research study on sleep and student achievement, which
of the following might be the hypothesis?
O
A. Students get enough sleep to be effective.
O
B. Memory is affected for students.
O
C. Achievement isn't dependent upon sleep.
O
D. The amount of sleep a student gets affects student achievement.
The hypothesis for a research study on sleep and student achievement would be that the amount of sleep a student gets affects student achievement. Option D. is correct.
Explanation:The hypothesis for a research study on sleep and student achievement would be D. The amount of sleep a student gets affects student achievement. This hypothesis suggests that the amount of sleep a student gets has an impact on their academic performance.
To support this hypothesis, the study would collect data on students' sleep duration and analyze their academic achievements, looking for any correlation between the two.
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Crust describes the outermost shell of a terrestrial planet. Earth’s crust is relatively thin, just 40-kilometers (25-miles) deep. Earth's crust can be divided into two types: continental and oceanic. How do these two types of crust differ? All BUT ONE could apply.
Answer:
?
Explanation:
A horse is running at 12m/s accelerated to 38m/s in 10 seconds. What is the horses acceleration.
Answer:
A horse is running at 12m/s accelerated to 38m/s in 10 seconds. What is the horses acceleration.
2.6m/s^2
When a horse is running at 12 m/s accelerated to 38 m/s in 10 seconds, the horse's acceleration is 2.6 m/s².
What is acceleration?Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.
Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions. Acceleration is a vector quantity since it has both a magnitude and a direction.
Initial speed of the horse = 12 m/s.
Final speed of the horse = 38 m/s.
Time interval = 10 seconds.
Hence, the horse's acceleration is = change in speed/time interval
= (final speed - initial speed)/time interval
= ( 38 m/s - 12 m/s)/10 s
= 26/10 m/s²
= 2.6 m/s².
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8. What is the resistance of a 1100W hair dryer plugged into a 110V outlet with a 10A current flowing through it?
Solve using the GUESA method
Answer:
11 ohms
Explanation:
V=IR
110=10xR
R=11 ohms
Explanation:
v=IR
110=10R
R=11
resistance of the hair dryer=11
Consider two circular metal wire loops each carrying the same current I as shown below. In what r... Consider two circular metal wire loops each carrying the same current I as shown below. In what region(s) could the net magnetic field B be equal to zero? III IV .RS O None of them O 1, III, and v O III only O II and IV Submit Answer Tries 0/1
Answer:
1, III, and v
Explanation:
The will be repulsion of magnetic field at that region since the direction of magnetic field is perpendicular to the direction of current.
In regions symmetrically located between two circular wire loops with current flowing in opposite directions, it is possible for the net magnetic field to be zero.
The question involves finding the regions where the net magnetic field could be equal to zero when two circular metal wire loops each carry the same current I. According to physics, particularly the study of magnetism and Ampere's Law, the magnetic field around a current-carrying wire forms concentric circles. If two such loops carry current in the same direction, their magnetic fields at a point between them will add together. Contrarily, if the loops carry currents in opposite directions, the magnetic fields may cancel each other out at some point between them, resulting in a net magnetic field of zero.
Such a scenario is depicted in the provided example where two loops are shown with their respective magnetic fields acting in opposite directions at point P, yielding a net magnetic field of zero. Therefore, to answer the student's question, it is likely that the net magnetic field could be zero in a region that lies symmetrically between the two loops if the currents are flowing in opposite directions.
When a rubber ball is thrown against a wall, energy is transferred and transformed. Select the
statement from the list below that does not support the law of conservation of energy. *
(1 Punto)
A. Before the ball is thrown, it has the highest potential energy due to the position of
S
in
O
B. When the ball is released, the thrower's arm transfers its energy to the ball.
O
C. After it is thrown, all of the ball's potential energy becomes kinetic energy.
O
D. When the ball hits the wall, it compresses, transforming its kinetic energy to potential energy.
E. The ball returns to its original shape and propels from the wall, transforming its potential energy to kinetic
energy.
energy.
The incorrect statement that does not support the law of conservation of energy is when the ball hits the wall, it compresses and transforms its kinetic energy to potential energy.
Explanation:The correct statement that does not support the law of conservation of energy is D. When the ball hits the wall, it compresses, transforming its kinetic energy to potential energy. According to the law of conservation of energy, energy cannot be created or destroyed, only transferred or transformed. Therefore, when the ball hits the wall, its kinetic energy is not transformed into potential energy, but rather into other forms of energy such as sound and heat.
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Which of the following pairs of terms directly relates to the actual brightness of a star?
A. absolute magnitude and luminosity
B. apparent magnitude and luminosity
C. size and luminosity
D. absolute magnitude and apparent magnitude
Answer:
D. absolute magnitude and apparent magnitude
Absolute magnitude and apparent magnitude are the pairs of terms
directly relates to the actual brightness of a star.
Star brightness can be viewed in two ways and they include
Absolute magnitude Apparent magnitudeApparent magnitude refers to the how the brightness of the star is viewed
from the Earth while absolute magnitude refers to how the stars are viewed
from a standard distance of 32.6 light-years, or 10 parsecs.
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Which is an example of a solution? A) sugar water B) muddy water C) sand and water D) cereal and milk
Sugar water (A) and salt water are solutions.
Muddy water, sand and water, cereal and milk, and vegetable soup are not solutions.
what is potential energy
Answer:
potential energy is energy that is being stored that is going to go into motion. Hope that helps a little
Explanation:
Answer:
Potential energy is the stored energy in an object.
Explanation:
When a roller coaster is going up it is gaining potential energy. When the roller coaster is at the highest point it has the most potential energy, stored energy.
What role does voltage play in the formation or use of an electromagnet?
Answer: did you try using socratic?
Explanation:
ASAP pls will mark brainiest Pls
1.) a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
2.) Weight is the measure of the force of gravity on an object's mass, while mass is the measure of how much matter there is in an object.
3.) 110.231 pounds
In the diagram, each charge is
-2.35*10^-6 C. What is the net force on
q3? Include a + or - sign to indicate the
direction of the force.
Answer:
Quick maths
First you find the fafarick and the lalickc and the caprisum and the joinnt
Based on the time measurements in the table, what can
be said about the speed of the car on the lower track as
compared to the higher track?
How can the reasoning for the above answer be best
explained? On the higher track, the elapsed time is
Calculate speeds for each track. How much faster was
the car on the higher track than the lower track?
Answer:
1) car travel faster on the higher track
2) shorter
3) 0.56m/s
Explanation:
Epeirogeny is crustal uplift without deformation. True False
Answer: True
Explanation: Epeirogeny is the regional uplift of an extensive area of the earth's crust.
When two bodies are charged, the total charge before and after charging remains the same because of:
a.
quantization of charges
c.
law of induction
b.
conservation of charges
d.
Coulomb’s law
Answer:
b. Conservation of charges
Explanation:
Carlota does 2000 J of work on a machine. The machine does 500 J of work. What is the efficiency of the machine?
A. 4%
B. 25%
C. 75%
D. 400%
Correct option is B. The efficiency of the machine is 25%, determined by dividing the work output (500 J) by the work input (2000 J) and then multiplying by 100 to get the percentage.
The efficiency of a machine is defined as the ratio of the work output to the work input, often expressed as a percentage. In this case, Carlota does 2000 J of work on the machine, and the machine does 500 J of work. To find the efficiency, we use the formula:
Efficiency (%) = (Work Output / Work Input) x 100
So, the calculation would be:
Efficiency (%) = (500 J / 2000 J) x 100 = 25%
The correct answer is B. 25%.
I NEED THIS FAST
Which of the following is true of real machines?
o work output is less then work input
o work output equals work input
o work input is decreased because of friction
o work output is greater than work input
Answer:
Work output is less than work input.
Explanation:
Work output can never be greater than work input. Machines allow force to be applied over a greater distance, which means that less force will be needed for the same amount of work. When a machine changes the size of the force, the distance through which the force is exerted must also change.
Brainliest???
How are magnetic force and distance from an object related
Answer:
Magnetic force obeys an inverse square law with distance
Explanation:
PLEASE HELP I WILL GIVE MAX POINTS
Collect the water sample in a glass tumbler and then put a straw in the water. Record the bending in the straw using a protractor and the angle is the answer required
Craig used 60 joules of work to lift a weight in 5 seconds.how much power was used
Answer:
the answer is 12
Explanation:
the answer is 12 because u have to think about 5 times 12 which would look like this: 5 x 12 = 60 would have to divide 60 from 5 like it says in the question.
Physics is explicitly involved in studying which of these activities?
A.
the mixing of metals to form an alloy
B.
the metabolic functions of a living organism
C.
the motion of a spacecraft under gravitational influence
D.
the depletion of the atmospheric ozone layer due to pollutants
E.
the killing of cancerous cells by radiation therapy
Each alveolus is surrounded by a network of _____.
capillaries
arteries
veins
cilia
What is the amplitude and wavelength of the wave shown below?
A. Amplitude: 30 cm; wavelength 60cm
B. Amplitude: 30 cm; wavelength 110cm
C. Amplitude: 60 cm; wavelength: 60cm
D. Amplitude: 60cm; wavelength 110cm
Choice-B is correct, but only halfway. This weird drawing appears to show TWO waves travelling through the same medium.
-- The big wavy line is a transverse wave, with amplitude=30cm and wavelength=110cm.
-- The short vertical lines are placed where the medium is squished, with thin spread out regions between them. This is a longitudinal wave, with amplitude=5cm and wavelength=10cm.
This could be the picture of a sound wave zipping along through the top of a train of 30cm waves on the lake.
How many times louder is the intensity of
sound at a rock concert in comparison with
that of a whisper, if the two intensity levels
are 130 dB and 2 dB, respectively?
Answer:[tex]6.309\times 10^{12}[/tex]
Explanation:
Given
Intensity level of rock concert [tex]=130\dB[/tex]
Intensity level of Whisper [tex]=2\dB[/tex]
Intensity of sound is given by
[tex]I=10\log _{10}(\frac{I}{I_o})[/tex]
where [tex]I_o=10^{-12}\ watts/m^2[/tex]
and difference in the intensity of the two sounds is [tex]db=130-2=128\ dB[/tex]
and
[tex]db=10\log _{10} (\frac{I_1}{I_2})[/tex]
[tex]12.8=\log _{10}(\frac{I_1}{I_2})[/tex]
[tex]\frac{I_1}{I_2}=10^{12.8}[/tex]
[tex]\frac{I_1}{I_2}=6.309\times 10^{12}[/tex]
Thus intensity of Rock concert is [tex]6.309\times 10^{12}[/tex] times louder than that of a whisper
What is acceleration?
Change in velocity
Change in displacement
change in distance
Answer:
acceleration is the rate of change of velocity
What is the relationship between the potential energy of a pendulum and the values of =(M) mass, (H) height, and (P) gravitational acceleration?
Answer: P.E = MPH
Explanation: given that
Mass = M
Height = H
Gravitational acceleration = p
The relationship between the potential energy of a pendulum and all these values will be
P.E = MPH
What was significant about the clay samples from the Western Hemisphere? How was the Alvarez hypothesis modified in response?
Final answer:
Clay samples from the Western Hemisphere are significant for studying ancient migration patterns, but they are not connected to the Alvarez hypothesis, which concerns the asteroid impact at the end of the Cretaceous period. The discussion of human migration into the Americas includes theories of both coastal and interior pathways. European contact led to diseases affecting the Indigenous population, with the post-colonization period marking the lowest numbers due to disease and conflict.
Explanation:
The significance of clay samples from the Western Hemisphere lies in their potential to provide insight into ancient migration patterns in the Americas. When discussing significant findings like clay samples or the Alvarez hypothesis, it's worth noting that the latter relates to the mass extinction at the end of the Cretaceous period, caused by an asteroid impact, rather than early human migration. Consequently, there's no direct modification of the Alvarez hypothesis in response to clay samples from the Western Hemisphere. In historical context, when dealing with human migration theories in the Americas, two predominant arguments arise: one supporting a coastal migration and the other an interior pathway. The debate over which came first remains unresolved, but both theories are supported by archaeological evidence.
As for the historical antecedents explaining why people in the Western Hemisphere became ill following contact with Europeans, it was largely due to a lack of immunity to diseases brought by Europeans, to which Indigenous populations had never been exposed. The year identified with the lowest population of Indigenous people varies according to different sources but is commonly placed after the European colonization, due to the devastating impact of disease, conflict, and dispossession.
Which of the following statements is TRUE in regards to Signal #2?
1) Signal #2 is a digital signal that transmits signals continuously.
2) Signal #2 is a digital signal that transmits signals in segments/intervals.
3) Signal #2 is an analog signal that transmits signals continuously.
4) Signal #2 is an analog signal that transmits signals in segments/intervals.
Answer:
2) Signal #2 is a digital signal that transmits signals in segments/intervals.
Explanation:
Signals are form of information propagating from the source to a display unit for appropriate interpretation. It can be either in a digital or analogue form.
A digital signal is a definite signal which is discrete in time and amplitude. It is mostly in the form of codes obtained from set of values. Graphically it transmits in the form of 1 and 0, showing a point of maximum amplitude (1) and minimum amplitude (0).
Analog signal is continuous signal describing the variation of two variables with respect to time.
Order the sounds made by these sources from highest to lowest pitch.
telephone, piano, motorcycle, lawn mower
lawn mower, motorcycle, piano, telephone
motorcycle, telephone, piano, lawn mower
lawn mower, piano, telephone, motorcycle
The order of the sounds made by these sources from highest to lowest pitch is motorcycle, telephone, piano, lawn mower. So, the third option is correct.
What is meant by pitch of a sound ?Pitch of a sound is defined as the characteristic of sound that helps us to sense the shrillness of a sound according to the frequency of vibration of the sound.
Here,
The various instruments given are considered as some sources of sound. Among them, the motorcycle is the sound source having the highest pitch.
Then comes the telephone that has second highest pitch.
The sound source that has the third highest pitch is the piano.
Among all the instruments, the lawn mower have the least pitch.
Hence,
The order of the sounds made by these sources from highest to lowest pitch is motorcycle, telephone, piano, lawn mower.
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