An object that weighs 75n is pulled on a horizontal surface by a horizontal pull of 50 N to the right. The friction force on this object is 30 N to the left. What is the acceleration of the object?

Explanation:

Newton's 1st law: An object in motion stays in motion, and an object at rest stays at rest, until acted upon by an unbalanced force.

Newton's 2nd law: Force equals mass times acceleration.

Newton's 3rd law: For every action, there is an opposite and equal reaction.

Answer:

[tex]\frac{1}{2}[/tex]

Explanation:

[tex]\frac{5}{6} -\frac{1}{3} = \frac{15}{18} -\frac{6}{18}=\frac{9}{18} =\frac{1}{2}[/tex]

Answer:

1/2

Explanation:

we will take the LCM of denominators with is LCM (6,3)=6.

Now we shall make denominators equal no both sides. Since 5/6 already has 6 as denominator we shall multiply 2 with 3 to make denominators equal in 1/3 and so we also multiply 1 with 2. we get

1/3 × 1/2= 1/6 ×2/1=2/6

now 5/6-2/6=3/6=1/2

The sun is the original source of solar energy, hydroelectric energy, food energy, coal energy, oil energy, and wind energy.

The sun is NOT the original source of nuclear energy. (b)​

Answer:

The answer is b. nuclear energy

Explanation:

Nuclear energy is a process through which electrical energy is generated by the disintegration of atoms from a material called uranium. The energy that uranium releases when its atoms disintegrate produces heat with which the water found in nuclear reactors is boiled to produce electricity.

Answer:

Period

Explanation:

we know that

The period of a wave is the time required for one complete cycle of the wave to pass by a point.

Period is the time which is taken by a wave to complete one complete cycle.

Explanation:

The period can also be referred as the time period or the wave period. The period is relevant to the concept of wave and its propagation, which leads to the measurement of its travel, leading to establish the relation between the period and the frequency.

The S. I. unit for the period is seconds. The period is in inverse relationship of proportionality with the frequency, which is the number of cycles completed in a second.

The answer is:

The voltage of the source is 8.40 Volts.

To solve the problem, we need to use the Ohm's Law equation, which states that:

[tex]Voltage(Volts)=Current(Amps)*Resistance(Ohm)[/tex]

From the statement we know that:

[tex]Resistance=2.21\Omega\\Power=32W\\Current=3.8A[/tex]

Now, substituting and calculating we have:

[tex]Voltage(Volts)=Current(Amps)*Resistance(Ohm)[/tex]

[tex]Voltage(Volts)=3.8A*2.21\Omega=8.40V[/tex]

Hence, we have that the voltage of the source is 8.40 Volts.

Have a nice day!

Answer:

Explanation:

An acid has H as the metal as in HCl

A base has OH as the nonmetal. (so Ca(OH)^2 is a base)

A salt has neither.

Answer:

Any medium solid, liquid or gas is required for sound waves to travel.

Explanation:

A sound wave requires a medium to travel. Sound waves are mechanical waves that is why these waves require a medium to travel. Sound waves can travel through solids, liquids, and gases.

In solids, the particles of the medium are closely packed together as compared to liquids and gases. In liquids, particles are less tightly packed and almost negligible in gases.

Therefore sound waves produce vibration in the dense or solid medium. Denser the medium faster the sound waves travel. However sound waves can not travel through empty space.

Answer:

the answer is B just took the test!!

Explanation:

Answer:

the answer is A) N2 + 3H2 → 2NH3

Explanation:

multiple reactants combine to form one product

option b is a single replacement

option c is a decomposition

options c is a double replacement

so the answer has to be A out of elimination anyway

Answer:The answer is B

Explanation:

Answer:

I beleive its B

Explanation:

If not then A but I'm positive its B

Answer:

U

Explanation:

The first law of thermodynamics states that:

[tex]\Delta U = Q-W[/tex]

where

U is the internal energy of the gas, which represents the sum of the chemical and thermal energy stored in the atoms and molecules of the gas

[tex]\Delta U[/tex] represents the variation of internal energy

Q is the heat absorbed by the system

W is the work done by the system

So, the sum of the chemical and thermal energy stored in atoms and molecules is represented by U, the internal energy.

Answer:

U APEX

Explanation:

Answer:

5.5 m/s

Explanation:

Assuming the bottle is initially stationary, we can write the law of conservation of momentum as follows:

[tex]p_i = p_f\\m_b u_b = m_b v_b + m_B v_B[/tex]

where

[tex]m_b = 0.4 kg[/tex] is the mass of the ball

[tex]u_b = 18 m/s[/tex] is the initial velocity of the ball

[tex]m_B = 0.2 kg[/tex] is the mass of the bottle

[tex]v_B = 25 m/s[/tex] is the final velocity of the bottle

[tex]v_b[/tex] is the final velocity of the ball

Solving for [tex]v_b[/tex],

[tex]v_b = \frac{m_b u_b - m_B v_B}{m_b}=\frac{(0.4 kg)(18 m/s)-(0.2 kg)(25 m/s)}{0.4 kg}=5.5 m/s[/tex]

[tex]F_{max}=7N\cdot1.75=\boxed{12.25N}[/tex]

Hope this helps.

r3t40

Refraction is the bending of light as it passes from one medium to another, causing objects to appear shifted or distorted when viewed through lenses.

The wave interaction that occurs as light passes from the air into the plastic lenses of the sunglasses is refraction. Refraction is the bending of light as it passes from one medium to another due to the change in its speed. This bending of light is what makes objects appear shifted or distorted when viewed through lenses.

Answer:

Aluminum ion is [tex]Al^{3+}[/tex]

Explanation:

Ions are formed due to the gain or loss of one or more electrons. There are two types of electric charges.

1. Positive charge

2. Negative charge

If an atom contains number of positive charges greater than the negative charges, its becomes positively charged. Also, if an atom contains number of negative charges greater than the positive charges, its becomes negatively charged.

We need to write the name of aluminium ion. The atomic number of Aluminium is 13. Its electronic configuration is, [tex]1s^22s^22p^63s^23p^1[/tex].

So, Aluminum ion is [tex]Al^{3+}[/tex]. Hence, this is the required solution.

The name of the aluminum ion is "aluminum ion" with a 3+ charge.

In chemistry, when an atom of aluminum loses three electrons, it becomes a positively charged ion known as the aluminum ion. Aluminum, as an element, is represented by the symbol Al and has an atomic number of 13, meaning it has 13 protons and 13 electrons in its neutral state.

When aluminum loses three electrons, it forms an aluminum ion with a 3+ charge. This happens because the number of protons (positive charges) remains the same, while the number of electrons (negative charges) decreases. The resulting positive charge on the ion signifies its ability to participate in various chemical reactions.

Aluminum ions play a crucial role in many industrial processes, particularly in the production of aluminum metal from its ore, bauxite. Additionally, they are essential in various chemical applications, including the manufacturing of aluminum-based products, catalysts, and electronics.

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Answer:

it is a nation wide crisis

Explanation:

Answer:

The internet is always growing

Explanation:

Answer:

Most of the eastern United States is a TROPICAL RAINFOREST bione

Answer:

A measurement standard is defined as 'the exact quantity people agree to use for comparison'.

Explanation:

For the same type of quantity, there is a unit of measurement which is defined and adopted either conventionally or by law which is used as standard for measurement of that quantity.

This measurement standard is defined as 'the exact quantity people agree to use for comparison'.

For example, for length the standard unit of measurement is 'meter'.

Answer:

is an object system or experiment that bears a defined relationship to a unit of measurement of a physical quality

At the instant the second bulb is connected ...

... the brightness of the first bulb doesn't change

... the brightness of the second bulb changes from dark (no brightness) to equal to the first bulb

When the second 20 Ohm bulb is added in parallel, the bulbs becomes brighter

Adding a second, identical 20 Ohm bulb in parallel with the first one will have the effect of increasing the brightness of the bulbs.

In a series circuit, the total resistance increases as more resistors are added, which reduces the current flowing through the circuit. As a result, the bulbs would be dimmer in a series circuit.

However, when the second 20 Ohm bulb is added in parallel, the total resistance decreases, allowing more current to flow through the circuit. This increased current results in a higher brightness of the bulbs.

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Answer:

exothermic

Explanation:

energy is absorbed by the surroundings

Answer:

endothermic, because energy is absorbed from the surroundings

Explanation:

Answer:

Yes it is a solid

Explanation:

It just has unusual properties.

Does it float when you drop it? then it is not a gas.

Does it pour into any container as water does? Then it is not a liquid.

So it's a solid.

And it can change it's shape

Answer:

Yes, it is.

Explanation: Rubber band is ab elastic material which when stretched changes it's original shape.

magnitude.

scalars are units that has magnitude only

vectors have both magnitude and direction

Answer:

The answer is C, the magnitude.

Explanation:

Because force, acceleration and speed are all vector quantities. That is, to represent them not only reaches a number, but it takes an address, meaning, etc.

Instead a scalar magnitude (for example: temperature, mass) requiere for representation of a single value.

Answer:

Question 1 : is the rate of flow of electrons in electric current.

Question 2: represents the amount of pressure behind electron flow

Question 3: is the rate of doing work

Question 4: Power

Question 5: Both AC and DC are only possible in certain materials with atoms that will allow electron flow.

Both AC and DC involve the flow of electrons.

Question 6: The flow of electrons is not constant and forward; it changes direction back and forth.

Question 7: The flow of electrons is constant and only in a forward direction.

Question 8: The movement of electrons from one atom to another atom in a line results in a flow of electric current.

Question 9: Electrons flow from the metal with the lower affinity to the metal with higher affinity and electrical current is generated.

Answer:

Carbohydrate loading, commonly referred to as carb-loading or carbo-loading, is a strategy used by endurance athletes, such as runners, to maximise the storage of glycogen (or energy) in the muscles and liver. C. maximize glycogen stores.

Explanation:

Answer:

C. maximize glycogen stores.

Explanation:

Answer: the naswer is A. hope i helped

Final answer:

The main energy source for the Sun is the fusion of hydrogen into helium, a process that takes place at the core under extreme temperatures and pressures. This fusion releases vast amounts of energy much greater than energy from fission or chemical reactions. The transformation of mass into energy in the Sun's core is the key to its consistent and long-term energy output. So the correct option is B.

Explanation:

The main energy source for the Sun is the fusion of hydrogen into helium. This process occurs at the core of the Sun, where temperatures reach about 14 million kelvin. The net reaction of fusion in the Sun can be summarized as the transformation of four protons, or hydrogen nuclei (^1H), into one helium nucleus (^4He), releasing significant energy in the form of two positrons, two neutrinos, and gamma rays. The energy produced from this nuclear fusion is much greater than the energy from nuclear fission or chemical reactions such as the burning of fossil fuels.

The fusion process in the Sun involves a series of reactions known as the proton-proton cycle. The core's extreme temperature and pressure allow protons to overcome their natural repulsion and collide, fusing into deuterium (hydrogen with one neutron), and subsequently into helium. During this fusion, mass is converted into energy, as described by Einstein's famous equation E=mc^2. This makes the fusion process highly efficient in releasing energy.

The energy released from fusion diffuses slowly from the Sun's core to its surface, except for neutrinos that escape immediately. This slow process of energy diffusion and the escape of neutrinos contribute to the stable energy output of the Sun. It's a continuous process that supports the Sun's longevity as a source of heat and light for the solar system, manifesting as the sunlight we receive.

For this case we have that by definition, Newton's Second Law states that:

[tex]F = m * a[/tex]

Where:

F: It's the strength

m: It's the mass

a: It's the acceleration

According to the data we have to:

[tex]F = 8,480N\\a = 26.5 \frac {m} {s ^ 2}[/tex]

If we clear the mass of the formula we have:

[tex]m = \frac {F} {a}\\m = \frac {8,480} {26.5} = 320kg[/tex]

Answer:

The mass of the chart is 320kg

Answer:

a car parked in a garage

Explanation:

where would a parked car go ? its not even in motion lol

Answer:

experiment

Explanation:

An organized procedure for testing a hypothesis that tests the effect of one thing on another under controlled conditions is called an experiment

Studying the effect of one thing on another in order to test a hypothesis is an experiment,

Scientific claims are statements made in science based on an experiment.

These Scientific claims are backed by experimental data and their true results obtained from scientific investigation and experimentation.

When it comes to testing a hypothesis, you can think about what precisely you should think about when it comes to how you should test a hypothesis. You might be curious what this is actually called. We refer to this as an experiment.

The popularly accepted scientific method may be thought of as a technique used to test a hypothesis to see if it is true or incorrect. If the experiment is successful, the hypothesis will then become a conclusion once the data has been examined.

Thus, studying the effect of one thing on another in order to test a hypothesis is an experiment,

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