Help please
Water is a compound because it (1 point)
• can be broken down into simpler substances.
• always has two hydrogen atoms for each oxygen atom.
• is made of water atoms joined together.
• both a and b
Which of the following is a heterogeneous mixture? (1 point)
• water in a swimming pool
• sugar water
• a jar of mixed nuts
• stainless steel,
The input force of a pulley system must move 8.0 m to lift a 3,000-n engine a distance of 2.0 m. what is the ima of the system?
Which of the following items is most sensitive to increased acidity in the environment?
Answer: CONCRETE BUILDINGS
Explanation:
i got it right in my quiz
Match the term to its definition. A. Conduction Heat flowing when a liquid or gas carries the heat B. Convection Heat flowing between two objects that are touching each other C. Radiation Heat flowing in waves
At noon, ship a is 30 nautical miles due west of ship
b. ship a is sailing west at 22 knots and ship b is sailing north at 23 knots. how fast (in knots) is the distance between the ships changing at 5 pm? (note: 1 knot is a speed of 1 nautical mile per hour.)
A strong magnetic field surrounds earth. How does earths magnetic feild help humans?
Answer:
Earth's magnetic field deviates high energy particles (e.g cosmic rays) that are a risk for human health.
Explanation:
Cosmic rays are high energy charged particles (88% protons, 10% nuclei of helium, 1% heavier nuclei) that came from the outer space. The energies of these particles are in the range of 1 GeV to 10⁸ TeV. Since they are charged particles, they will be deviated by Earth’s magnetic field¹ (as a reminder: A magnetic field applies a magnetic force over a moving charged particle).
Earth’s magnetic field works as a shield to humans against high energy charged particles, if cosmic rays were in touch with a human body, it can break molecules that forms DNA structure². Modifying that structure can lead to diseases as cancer, for example.
Units:
GeV: Giga-electronvolt
TeV: Tera-electronvolt
¹Magnetic field: It is generated around the space of a moving charged particle.
²DNA structure: It is a compound of different molecules that provides information to cells functionality.
what mechanical layer lies below the lithosphere
Answer: The layer below the lithosphere lies the Asthenosphere.
Explanation:
The asthenosphere is a viscous layer, in which the rocks are solid but has the ability to slightly flow due to deformation. This layer plays a very significant role in the plate tectonic movement, which initiates the motion of the lithospheric crust, due to the generation of the convection current at the mantle. It is present in the upper part of the mantle.
The internal heat from the core of the earth radiates to the mantle, and the magma at the mantle gets heated up and become less dense and rises up, and this magma when reaches on the upper part of the mantle, near the surface, gets cools down and become more dense, and sinks. This continuous circulation of magma in the mantle region is known as the convection current.
The layer below the lithosphere is the asthenosphere, which is semi-fluid and allows the tectonic plates of the lithosphere to move.
Explanation:The mechanical layer that lies below the lithosphere is known as the asthenosphere. This semi-fluid layer is located directly underneath the rigid lithospheric plate and is characterized by its ability to flow and move. Due to intense heat and pressure coming from the earth's core, the rocks in the asthenosphere exist in a plasticky, semi-liquid state, which allows the tectonic plates of the lithosphere to move and shift above it.
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a charge of 6.4x10^-7 C experiences an electric force of 1.8x10^-1 N what is the electric field strength
How much work does the electric field do in moving a proton from a point with a potential of +145 v to a point where it is -55 v ? express your answer in joules?
Final answer:
The electric field does work on a proton when it moves between two points with a potential difference, with the value calculated as 3.204 × 10-17 joules.
Explanation:
The question asks us to calculate the work done by the electric field in moving a proton between two points with a specified electric potential difference. Since work done by an electric field is equal to the charge of the particle times the change in electric potential (W = qV), and we know the proton's charge is approximately 1.602 × 10-19 coulombs, we can calculate the work done as follows:
Change in potential (V) = Vfinal - Vinitial = (-55 V) - (+145 V) = -200 VWork done by the electric field (W) = qV = (1.602 × 10-19 C) × (-200 V) = -3.204 × 10-17 JThe negative sign indicates that the electric field is doing work on the proton in the direction opposite to the electric field. Therefore, the electric field does 3.204 × 10-17 joules of work on the proton.
How does the mass relate to the momentum ?
The potential difference in a simple circuit is 9 v and the resistance is 47 ω . what current flows in the circuit? answer in units of
a.
The current flowing in the circuit with a potential difference of 9 volts and resistance of 47 ohms is approximately 0.1915 amperes (A), calculated using Ohm's Law (I = V/R).
The current that flows through a circuit can be calculated using Ohm's Law, which is given by the formula V = IR, where V is the potential difference, I is the current, and R is the resistance. In this case, the potential difference is 9 volts (V) and the resistance is 47 ohms (Ω). To find the current, we rearrange the formula to I = V/R.
Substitute the given values into the formula:
I = 9V / 47Ω
I ≈ 0.1915 A
So the current flowing in the circuit is approximately 0.1915 amperes (A).
Although Neptune is the farthest planet from the Sun, it travels in a fixed orbit around the Sun and never changes its path. What is the reason for this?
A) The magnetic pull of the Sun holds Neptune in its orbit.
B) The gravitational pull of the Sun holds Neptune in its orbit.
C) The nuclear force acting between the Sun and Neptune holds the latter in its orbit.
D) The repulsive force of bodies outside the solar system holds Neptune in its orbit.
Answer:
B. The gravitational pull of the sun holds Neptune in its orbit.
Explanation:
Whether a farthest planet or a nearest planet, all the planets in the solar system are held in their respective orbits by the mutual gravitational force of attraction. That is, the Sun exerts a gravitational force on the planet and the planet in turn pulls the Sun towards it. These two forces are equal in magnitude and oppositely directed to each other.
That is very well explained by the Newton's universal gravitational law,
As the distance between the Sun and the planet increases, the mutual gravitational force of attraction between the planets will decrease.
Mercury, Venus, Earth , Mars, Jupiter, Saturn, Neptune and Uranus are the planets that belong to the solar system. All these planets are revolving around the Sun.
Answer:
B
Explanation:
The outer shell of the atoms in group D____
Are empty
Are half full
Are full
Need one more electron to be full.
Answer: Option C) Are Full
Explanation: In the modern periodic table, Group D is placed between S and P blocks. The valency of this group display number of valencies. The valency of an element can be defined as the number of hydrogen atoms that can either or replace one atom of that element.
For Group D elements, the outer most shell are observed to be full.
This outermost shell is referred to as the valence shell, and the electrons located within it are referred to as valence electrons. The outer shell of the atoms in group D are full.
What is a periodic table?The periodic table is an organization of all known elements in order of increasing atomic number and repeating chemical characteristics. They are organized in a tabular format, with a row representing an era and a column representing a group.
Elements of the same group will have the same valence electron configuration and, as a result, will have comparable chemical characteristics.
The amount of electrons in an atom's outermost shell impacts its reactivity, or proclivity to form chemical interactions with other atoms. This outermost shell is referred to as the valence shell.
Hence the option c is correct. The outer shell of the atoms in group D are full.
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Make the following conversion.
45 m = ____ cm
4500
0.45
450
0.045
A metal sphere has a charge of +8.0 mc. what is the net charge after 6.0×1013 electrons have been placed on it?
A vector has an x-component of length 10 and a y-component of length 3. What is the angle of the vector? (Hint: Use the inverse tangent.)
The final phase of the order cycle is called order ____.
Suppose you were asked to demonstrate electromagnetic induction. Which of the following situations will result in an electric current?
A magnet is moving toward a wire loop.
A wire loop is moving away from a magnet.
A wire loop is rotated near a magnet.
All of the above
the combination of all forces acting on an object is called _____.
Michaela is babysitting little Tommy Turner who is known to be terror . Michaela answered the phone when Tommy's parents called to check him leaving Timmy unattended for three minutes .During that time Tommy turned the oven on its hottest setting and placed his new police car Mylar ballon in the oven. what will most likely happen to his ballon
the balloon will pop
The increased temperature will cause the particles in the balloon to move faster and will create more pressure on the balloon. This pressure will pop the balloon.
A car starts from rest at a stop sign. It accelerates at 4.0 m/s2 for 3 seconds, coasts for 2 s, and then slows down at a rate of 3.0 m/s2 for the next stop sign. How far apart are the stop signs?
English help please
The last answer says archer
An experiment is designed to test the relationship between the initial height of a basketball before it is dropped to the height of its rebound bounce. The height of the rebound bounce is measured using a scale positioned behind the ball.
In the above experiment, which condition would not be controlled?
The temperature differences seen between quito, ecuador, and guayaquil, ecuador, illustrate the effect of _____. ocean currents cloud cover altitude
This one has got to be the altitude.
A soccer ball is kicked with an initial speed of 8.8 m/s. After 0.179 s it is at its highest point. What was its initial direction of motion?,
Compare and contrast the movement of electric charge in a solution with the transfer of electric charge between solid objects.
Electric charge transfer between solid objects involves the movement of electrons, whereas in solutions it involves the movement of both cations and anions. Both processes follow the principle of charge conservation.
Understanding the movement of electric charge requires comparing how it occurs in solutions versus solid objects. In solid objects, charge transfer primarily happens through the movement of electrons. When two solid objects come into contact, electrons can be transferred from one object to another, often facilitated by friction, leading to one object becoming negatively charged and the other positively charged.
On the other hand, in a solution, electric charge is carried by ions. For instance, in an ionic solution like salt water, both positive ions (cations) and negative ions (anions) can move freely. This is different from the transfer between solid objects where only electrons, carrying negative charges, move.
The relationship between the total charges before and after the transfer is that the total amount of charge is conserved. This means the sum of positive and negative charges remains constant, even though the charges might be redistributed. This principle is crucial in both solid object charge transfer and ionic solutions.
So, while the transfer of electric charge between solid objects involves moving electrons, in a solution, it involves the movement of both cations and anions. Both processes abide by the principle of charge conservation, ensuring that the total charge remains constant.
A condition that affects the ability to sleep or the quality of sleep is referred to as a __________.
A. parasomnia
B. sleep disorder
C. sleep debt
D. night terror
Because speed is squared in the kinetic energy equation doubling an object's speed will what to its kinetic energy
When you look into a clear pond, a fish may appear to be in a different position than it actually is. What is this caused by?
A. diffraction
B. dispersion
C. refraction
D. reflection,
Select all that apply. A hypothesis is _____. always correct determined before experimentation begins the experimental factor that changes in response to a change in the independent variable testable and falsifiable
A hypothesis is a testable and falsifiable assumption known before experimentation. It's not always correct and does not always change in response to a change in the independent variable. Even when experiments support a hypothesis, it is not confirmed as absolutely correct.
Explanation:A hypothesis is a testable and falsifiable assumption based on what is known. It is determined before any experiment begins and serves as a guide for the collection and analysis of data. For instance, we could formulate a hypothesis like, 'If I water plants with sugar-mixed water, they will grow faster.'. If subsequent experimentation disproves this hypothesis, it must be discarded or reformed.
A hypothesis does not necessarily change in response to a change in the independent variable; rather, it predicts the expected response or outcome. However, a hypothesis is not always correct. It represents our best prediction based on the current information and can often be proven wrong as new data or insights become available via further empirical research.
Furthermore, in scientific research, even though a hypothesis is supported by multiple experiments, it does not confirm it to be correct, as future experiments could contradict it. Also, if a hypothesis explains a large amount of experimental data it could be considered a theory, but even theories can be modified if new data appears.
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