If there are 4Hz, how many waves per second are there?

Answer:

The change in momentum for the bug and the car will be equal, impulses will be equal in opposite directions and the bug will have a greater acceleration compared to the car, because it has a smaller mass.

Explanation:

Hope this helps..

Answer:

A E and F are the correct answers

Explanation:

Answer:

A E F are correct

Explanation:

Cheryl covers the first 50 miles of the journey in 50 miles and the second 75 miles in 75 miles. 3 kilometers have been traveled in total.

It is calculated by dividing the overall distance traveled by the overall journey time. Consider the older automobile as an illustration. The car's average speed would be 70 / 2 = 35 miles per hour if it covered 70 miles in two hours. Hence, its speed would be 35 mph.

Speed indicates how quickly something or someone is moving. If you know how far something has traveled and how long it took to get there, you can calculate its average speed.

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Answer:

Gabby's momentum before the collision is 202 kg·m/s

Explanation:

The given parameters of the motion of the people playing football in the park are;

The interaction of Marie and Gabby when they go for the interception = Collide

The total momentum of Marie ang Gabby after the collision, \(\Sigma P_{final}\) = 382 kg·m/s

The initial momentum of Marie, P₁ = 180 kg·m/s

By the law conservation of conservation of linear momentum, we have;

The total initial momentum before the collision, \(\Sigma P_{initial}\) = The total momentum after the collision, \(\Sigma P_{final}\)

The total initial momentum before the collision, \(\Sigma P_{initial}\) = Marie's momentum before the collision, P₁ + Gabby's momentum before the collision, P₂

∴ \(\Sigma P_{initial}\) = P₁ + P₂ = 180 kg·m/s + P₂

From which we have;

\(\Sigma P_{initial}\) = 180 kg·m/s + P₂ = \(\Sigma P_{final}\) = 382 kg·m/s

∴ 180 kg·m/s + P₂ = 382 kg·m/s

P₂ = 382 kg·m/s - 180 kg·m/s = 202 kg·m/s

P₂ = 202 kg·m/s

Gabby's momentum before the collision, P₂ = 202 kg·m/s.

The magnitude of the gravitational force acting on the car is 14700 N.

In mechanics, gravity, often known as gravitation, is the force of attraction that acts on all matter. It has little impact on determining the intrinsic characteristics of common stuff because it is by far the weakest known force in nature.

In contrast, it governs the formations and evolution of stars, galaxies, and the entire cosmos by its extensive and ubiquitous action, which affects the trajectories of objects in the solar system and beyond the universe.

In this free body diagram: 14700 N force acting downwards due to its weight. Hence, it is the magnitude of the gravitational force acting on the car.

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Explanation:

there are 2 factors :

1. distance : the farther away the dimmer the star appears, even if it is actually brighter than the sun.

2. the basic size and brightness of the other star. as the sum is a medium-sized star, it means that there are also many stars that are smaller and/or dimmer than our sun.

Answer:

filament bulb, filament lamp

Explanation:

More length of a wire is a component that has a greater resistance as the current through it increases​.

The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions present in the wire as they pass through. The moving electrons can collide with the ions present in the metal.

This makes more difficult for the current to flow and causes resistance in the wire so we can conclude that more length of a wire is a component that has greater resistance as more current passes through it.

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Answer:

free pints for the doctor so don't provide it

For atomic transitions in hydrogen the wavelength of the first line in the Lyman series is 121.65 nm.

The Swedish spectroscopist, Rydberg, showed that all series of lines in the hydrogen spectrum could be described by the following expression:

1/λ = \(R_{H}\) [\(1/\)\(n_1^{2}\) - \(1/\)\(n_2^{2}\)]    

Where, \(R_{H}\) = Rydberg's constant = 1.09677 × 10⁷ m⁻¹ = 109677 cm⁻¹

and \(n_1 =\) 1,2,3,4......

      \(n_2 =\) \(n_{1}+1 , n_{2}+2, n_{3}+3,.......\)

For Lyman series, n₁ = 1 n₂= 2

Now, the wavelength of the first line in the Lyman series is:

1/λ = \(R_{H}\) [\(1/\)\(n_1^{2}\) - \(1/\)\(n_2^{2}\)]        

1/λ  = (1.09677 × 10⁷ m⁻¹) × [(1/1²) - (1/2²)]

1/λ  = 1.2165 m

  λ  = 121.65 nm.

Thus, the wavelength of the first line in the Lyman series is 121.65 nm.

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Answer:

No

Explanation:

Answer:

yes

Explanation:

The magnitude of the boat’s acceleration while it travels 12.0 m is b. 2.5 \(ms^{-2}\)

u= 9.5 \(ms^{-1}\)

v= 5.5 \(ms^{-1}\)

s= 12 m

From the given data we can use,

\(v^{2} -u^{2} =2as\)

to calculate acceleration.

\(v^{2} -u^{2} =2as\),

Where,

v is the final velocity,

u is the initial velocity,

a is the acceleration and

s is the distance covered.

Substituting the values we have,

\(v^{2} -u^{2}\)= 2×a×s

\((5.5)^{2}\) - \((9.5)^{2}\)= 2 ×a×12

a= \(\frac{(5.5)^{2} -(9.5)^{2}}{(2)(12)}\)

a= \(\frac{(30.25)^{2} -(90.25)^{2}}{(24)}\)

a=\(\frac{-60}{2000}\)

a=-2.5 \(ms^{-1}\)

(The negative sign says that it is a negative acceleration  )

Therefore the magnitude of the boat's acceleration is -2.5 \(ms^{-1}\)

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The density of the of the olive oil, given that it has a mass of 690 grams and a volume of 750 cm³ is 0.92 g/cm³

We know that density is defined as mass per unit volume. It is expressed as:

Density = mass / volume

Thus, with the above formula, we can determine the density of the oliver oil as illustrated below:

Density = mass / volume

Density of olive oil = 690 / 750

Density of olive oil = 0.92 g/cm³

Therefore, we can conclude that the density of the olive oil is 0.92 g/cm³

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Answer:

Waves are caused by wind, or are created by the friction between wind and surface water

Explanation:

The distance covered is 4d.

We know that

the magnetic field is inversely proportional to distance.

\(\dfrac{B_1}{B_2} = \dfrac{D_2}{D_1}\)

\(\dfrac{20}{5} = \dfrac{D_2}{d}\)

\(D_2 = 4d\)

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The moment when the coffee filter fall from the upward, it is in the equilibrium.

A coffee filter is falling through the air after being released from a specific height. The filter accelerates for a time and rotates a bit so that the bottom of the filter is facing down, but then reaches a terminal velocity. Now, it is continuing to fall at a constant speed without tipping or rotating. When it is falling from the height, the gravitational force acting on it and the air resistance acting on it balances out each other. Then there is no net force on the coffee filter that is acting on it either ways. When the filter is going downwards many are the forces they are working on it, but when it is going down all the forces acting on it got cancel out and only the net forces acting on majorly cancel each other effect and it nullifies them and their effect and we got a net zero force on it. Hence, we can conclude that at the moment, when the coffee filter is falling from the height the forces are balance out and there is no net force and the coffee cup is in equilibrium.

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A shock wave is produced when: C. a supersonic flow changes to subsonic flow.

A shock wave is a type of compression wave that occurs when a supersonic flow encounters a boundary, obstacle or change in the shape of the flow path, which causes it to slow down and transition to subsonic flow. The abrupt change in flow velocity and pressure creates a region of extremely high pressure and temperature, resulting in a shock wave. This shock wave is characterized by a sudden increase in pressure, temperature, and density, as well as a decrease in flow velocity. Therefore, the correct option is (C).

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Appliances connected so that they form a single pathway for charges to flow are connected in a(n)

A. Series circuit

Appliances connected so that they create a single pathway for charges to flow are connected in a series circuit. Therefore, option (A) is correct.

In a series combination of appliances, they are connected end-to-end. Consider two resistors, R₁ and R₂ which are connected in a series combination then their effective resistance can be given by:

Total Resistance of the series circuit, R =  R₁ + R₂

In a series combination, the current flows through one appliance and then through another appliance. The same current flows through each appliance in one direction. The total voltage of the series circuit is equal to the sum of all the voltage drops across all appliances.

A potential difference of the series circuit, V  = V₁ + V₂

Therefore, when appliances are connected in a series circuit they form a single pathway for charges to flow.

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Rx and Ry represent the x- and y-components of the force of the current, respectively.

The magnitude of the force of the current, or the strength of the current, is represented by |r|. In terms of the forces moving the boat, the x- and y-components of the force of the current represent the horizontal and vertical forces that the current exerts on the boat.

|r| represents the magnitude of this force, which can be thought of as the intensity of the current. The stronger the current, the greater the force it will exert on the boat and the greater impact it will have on its movement.

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Based on the information provided about the three LR circuits with the same resistor but different inductors, and considering the inductor current as a function of time when connected to a DC emf, you can rank the inductances L1, L2, and L3 from largest to smallest as follows:

This ranking is based on the assumption that a larger inductance will take longer to reach its steady-state current, resulting in a slower rise in current over time.

Inductance is the property of an electronic circuit that causes an electric potential to arise in proportion to the current flowing in the circuit, this property is referred to as inductance. Inductance is the property of an electronic circuit that creates an electric potential proportional to the current flowing in the circuit which is known as self-inductance.

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Explanation:

Michael should put the vase at the bottom of the shelf to reduce the potential energy because the height of the vase to the floor is nearly zero.

The net force between Superman and Spiderman is 3 N, and it acts in the direction of Superman's force.

As per the question, the force exerted by :

Superman against Spiderman = 28 N

Spiderman against Superman = 25 N,

We can determine the net force and its direction by considering the following:

To find the net force, we need to subtract the forces exerted in opposite directions. Since Superman and Spiderman are pulling against each other, we have:

Net force = Force exerted by Superman - Force exerted by Spiderman

Net force = 28 N - 25 N

Net force = 3 N

The net force between Superman and Spiderman is 3 N.

To determine the direction of the net force, we need to consider the signs of the forces. Since Superman's force is greater than Spiderman's force, the net force will be in the direction of Superman's force.

Thus, the net force of 3 N is in the direction of Superman's force.

Therefore, the net force between Superman and Spiderman is 3 N, and it acts in the direction of Superman's force.

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The vertical vector component of a ball kicked at an angle of 58 degrees with an initial velocity of 82 feet per second is 57.568 feet per second.

The vertical vector component is found by multiplying the initial velocity by the sine of the angle of inclination.

In this case, the sine of 58 degrees is 0.814155, so the vertical vector component is

82 * 0.814155 = 57.568 feet per second.

The vertical vector component represents the velocity of the ball in the vertical direction.

As the ball travels through the air, the vertical vector component will decrease due to the force of gravity.

However, the horizontal vector component will remain constant.

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Answer:

D. The total amount of energy at the bottom is equal to the amount at the top, but he gained some energy as he traveled due to a higher speed.

Explanation:

The total amount of energy at the bottom is equal to the amount at the top, but some energy was converted into other forms due to friction.

Therefore the correct answer is option B.

The sum of all the energy in motion (total kinetic energy) and all the energy that is stored in the system (total potential energy) is known as mechanical energy.

The expression for total mechanical energy can be given as follows

ME= PE + KE

As given in the problem Jacob is riding his bike down a tall hill. At the top of the hill, he has 2800J of potential energy. At the bottom of the hill, when he is going the fastest, his kinetic energy measures 2650J.

However, some energy was changed into other forms owing to friction, so the total quantity of energy at the bottom is equal to the whole amount at the top.

Thus, option B is the appropriate response,

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Answer:

F - fr = ma ,    N - W = 0

Explanation:

In this exercise we are asked to identify the forces that act on the jack, for this we will use Newton's second law

On the x axis

We have two forces: the friction and the force of the girl who pulls the cat

           F - fr = ma

On the y axis

There are two forces: normal and weight

         N - W = 0

A diagram of these forces can be seen in the attachment

Answer:

Explanation:

One example of a force acting at a distance that is not gravitational is the electromagnetic force. The electromagnetic force is responsible for the interaction between electrically charged particles, such as protons and electrons. This force can attract or repel particles depending on their charges, and it can act over long distances. For example, the electromagnetic force is responsible for the attraction between the positively charged nucleus and negatively charged electrons in an atom, as well as the interaction between magnets.

Human activities such as deforestation, pollution, and greenhouse gas emissions are altering the planet, leading to climate change, loss of biodiversity, and environmental degradation.

According to a report by the Intergovernmental Panel on Climate Change (IPCC), human activities have caused the Earth's surface temperature to rise by 1.1°C since the pre-industrial era, leading to more frequent and severe weather events, sea-level rise, and changes in ecosystems.

Deforestation and habitat destruction have led to a loss of biodiversity and habitat for many species, contributing to a sixth mass extinction event. Additionally, pollution from agriculture, industry, and transportation has negative impacts on human health and ecosystems.

To address these issues, individuals can reduce their carbon footprint, support sustainable practices, and advocate for policy change. Governments can implement regulations and incentives to promote sustainability and shift towards renewable energy.

As a species, we need to prioritize the health of our planet and work together to create a sustainable future. Sources: IPCC AR6 Report, WWF Living Planet Report 2020.

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Answer:

11 hours and 15 minutes.

Explanation:

I did the math and that was my answer.

Explanation:

The options are; Ice Steam and Water.

The state of matter associated with the options are;

Ice - Solid

Steam - Gas

Water- Liquid

The particles are arranged in a regular pattern in ____________________

Among all the state of matter, the particles are closely packed and in an ordered manner is observed in the solid state - Ice

The particles are close together but not in a pattern in ____________________

In the liquid state of matter, the particles are not as tightly bounded as that of the solid. Hence they are able to still move around a bit.  - Water

The particles move quickly in all directions in ____________________

The particles of the gaseous state move in all directions colliding with each other and the walls of the container. - Steam