A 60.0 kg runner is moving at 6.00 m/s and speeds up to 9.00 m/s. The runner’s change in kinetic energy is 1,350 J.

Answer:

F = MLT^-2

Explanation:

Dimension of force

Force = Mass × acceleration

= Mass × (displacement/time²)

= M¹ × (L¹/T²)

= M¹ × L¹T-²

Force = MLT^-2

Thus, The dimension of Force is MLT^-2

Explanation:

the Dimension of force is MLT^-2

Newton’s Second Law concerns the generation of force based on an object’s mass and acceleration, as described by the equation F=ma.

Hope this helps!

The two variables which influences the body force addressed in “Newton’s second law of motion” s mass and acceleration.

Explanation:

The “Newton’s second law of motion” states that rate of change of momentum is directly in proportional to force applied on body.  

[tex]\begin{array}{l}{F \propto \frac{d p}{d t}} \\ {F=m \cdot \frac{d v}{d t}} \\ {F=m \cdot a} \\ {\text { Force }=\text {Mass} \times \text {Acceleration}}\end{array}[/tex]

This is how the Second law of motion is derived in formula by the Newton which establishes the relationship between the two variables which influences the force of the body.

Answer:

3.1 m/s

Explanation:

The acceleration of the ball is given by:

[tex]a=\frac{v-u}{t}[/tex]

where

v is the final velocity

u is the initial velocity

t is the time elapsed

Here we know:

a = 1.8 m/s^2 is the acceleration

v = 7.6 m/s is the final velocity

t = 2.5 is the time elapsed

Solving for u, we find the initial velocity of the ball:

[tex]u=v-at=7.6 m/s-(1.8 m/s^2)(2.5 s)=3.1 m/s[/tex]

Answer:

B. The core is the thickest of Earths layers

Explanation:

Option A  is incorrect because the crust is way thinner than the mantel.

Option C is incorrect because the inner core is 1k whereas the outercore is 2k

Option D is incorrect because the crust is the thinnest layer

The core is the thickest of earths layers,is the conclusion is supported by information in the table.

The core is the thickest of earths layers,is the conclusion is supported by information in the table.

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Its speed is zero at the beginning of the 3.25 s and 14 m/s at the end.

I'm thinking you probably wanted to find the car's acceleration.

Acceleration = (change in speed) / (time for the change)

Acceleration = (14 m/s) / (3.25 s)

Acceleration = 4.31 m/s²

The car's speed is 14.0 m/s; it had accelerated from 0 m/s over the course of 3.25 seconds.

The car, as described in your question, started at a speed of 0 m/s and in 3.25 s, it reached a speed of 14.0 m/s. This means the car's final speed or velocity is 14.0 m/s.

Let's add some context to help you understand. Acceleration is the pace at which an object changes its speed and is measured in m/s². In your case, the car starts from rest (0 m/s) and after 3.25 s, it attains a speed of 14.0 m/s. This implies that the car has been accelerating. Finally, it attains the speed of 14.0 m/s.

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Answer:

the main ingredient that helps a cake rise is baking powder (sodium bicarbonate); when it interacts with the heat, it creates a chemical reaction that produces carbon dioxide (tiny bubbles) to allow the cake to be light and fluffy.

This is a type of chemical reaction...exothermic (reaction that produces heat) and endothermic (reaction of taking the heat in).  Endothermic chemical reaction that changes the batter from the thick liquid state to a firm, fluffy state.

Explanation:

Answer:

27 m/s

Explanation:

Momentum is conserved.

Initial momentum = final momentum

(0.25 kg) v = (45 kg + 0.25 kg) (0.15 m/s)

v ≈ 27 m/s

To make the maximum stress the same across the entire section, the proportion needs to be X squared.

The answer is X^2

Answer:

Hey there!! So the answer is that the heat required to convert a solid into a liquid or vapor, or a liquid into a vapor, without change of temperature. Hope this helped and have a great day!!

Answer:

Explanation:

This is the invisible heat required to change the state of a body either from solid to liquid or from liquid to gas.

Latent heat is not detectable by a thermometer.

There are two types of latent heat

(1) Latent heat of fusion

(2) Latent heat of vaporization

(1) Latent heat of fusion: This is the heat energy required to convert a substance from its solid form to its liquid form without a change in temperature.

(2) Latent heat of vaporization: This is the heat required to convert a substance from its liquid form to vapour without a change in temperature.

Today, most classification systems place bacteria in the kingdom

a. Monera

Efficiency =

(energy coming out that does what you want)

divided by

(total energy you put in).

= = = = = = = = = =

Efficiency = (20 J) / (100 J)

Efficiency = 20/100

Efficiency = 0.20

Efficiency = 20%  (C)

Engine's efficiency is the ratio of the work done by the engine and heat absorbed by it.  The efficiency of the given engine is 20%.

[tex]E = \dfrac {W}{q}\times 100[/tex]

Where,

[tex]E[/tex]- efficiency

[tex]W[/tex] = work done by engine = 20J

[tex]q[/tex] - energy absorbed by engine  = 100 J

Put the values in the formula,

[tex]E = \dfrac {20}{100}\times 100\\\\E = 20\%[/tex]

Therefore, the efficiency of the given engine is 20%.

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Answer:

110 g

Explanation:

q = mCΔT

where q is heat, m is mass, C is specific heat capacity, and ΔT is change in temperature.

Given q = 250 J, C = 0.228 J/g/°C, and ΔT = 10.0 °C:

250 J = m (0.228 J/g/°C) (10.0 °C)

m = 110 g

To find the mass of tin, the formula Q = mcΔT is used, with the given specific heat capacity and the change in temperature. The calculation results in a mass of approximately 109.65 grams for the tin when 250 J of thermal energy raises its temperature by 10°C.

To calculate the mass of the tin when 250 J of thermal energy are added, and its temperature increases from 24.0 degrees C to 34.0 degrees C, we use the formula Q = mcΔT, where Q is the heat added, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. Given that the specific heat capacity of tin (c) is 0.228 J/g°C, and the change in temperature (ΔT) is 34.0°C - 24.0°C = 10°C, we can rearrange the formula to solve for the mass (m).

m = Q / (cΔT) = 250 J / (0.228 J/g°C × 10°C) = 250 J / (2.28 J/g) = 109.65 g (rounded to two decimal places).

The mass of the tin is therefore approximately 109.65 grams.

Answer: i think it would be watts

Answer:

d

Explanation:

i got it correct on my test

Answer:

A constant magnetic field creates an electric field.

Explanation:

Well, by definition, a magnetic field produces forces on moving charges. So if there’s just a magnetic field, and there’s a conductor with no charges already moving, there’s no reason for them to start to move, and plenty of reason (Ohm’s law) for them to stop.

Mind you, if you drag the conductor sideways through the field, the magnetic field will push the charges sideways to sideways, i.e., along the wire, giving an EMF and, if there’s a closed circuit, a current. This is probably the most common way of doing things.

Answer:

A moving magnetic field creates an electric field.

A moving electric field creates a magnetic field

Explanation:

Magnetic Field is the concentration of magnetism that is created around a magnetic charge in a given space. It is the magnet that creates the magnetic field, just as it is the electric charge and the mass that, respectively, create the electric and gravitational fields.

The origin of the magnetic field is in the movement of electrical charges. When the electric field oscillates in some region of space, this oscillation gives rise to a magnetic field oriented in a direction perpendicular (90º) to the electric field. To better understand the properties of the magnetic field, we make use of a feature known as induction lines, through which we can better visualize the shape of the magnetic field.

Answer:

Explanation:

They substituted the value of M₁.

∑F = ma

M₁ a = T₁ - F

M₁ a = T₁ - Nμ

M₁ a = T₁ - M₁g μ

Given that M₁ = 2, g = 9.81, and μ = 0.25:

(2) a = T₁ - (2) (9.81) (0.25)

Answer: goldilock's zone

The zone which allows the potential for life on Earth is the circumstellar habitable zone.

Explanation:

The circumstellar habitable zone is the zone in which Earth exists. This zone allows the Earth to have or support life on the planet. The habitable zone signifies the presence of support system which could lead to pursue life and that is the presence of water and oxygen.

The water needs to be in ample liquid form with a well defined atmospheric pressure. The presence of zone is circumstellar that is determined by the position of the planet in the Solar System.

Answer:

B) 2.2 Ω

Explanation:

The resistor between B and C is connected in parallel to the resistor between C and D (because their ends are connected to the same points: C on one side and B (which has same voltage as D) on the other side, so they have same potential difference across them.

So their equivalent resistance is

[tex]\frac{1}{R_{BD}}=\frac{1}{R_{BC}}+\frac{1}{R_{CD}}=\frac{1}{4.0 \Omega}+\frac{1}{5.0 \Omega}=\frac{9}{20 \Omega}\\R_{BD}=\frac{20 \Omega}{9}=2.22 \Omega[/tex]

The resistor between A and B, instead, is short-circuited, because the current flows through the upper branch of the circuit (connecting A with C), which has zero resistance (it is a wire without any resistor). This means that the resistor between A and B should not be considered: so, the total resistance of the circuit is

[tex]2.2 \Omega[/tex]

Jenny's poor performance in her speech due to nervousness and stuttering is an example of performance anxiety.

This situation can be described as a case of performance anxiety, where Jenny's nerves and fear of speaking in front of the class caused her to stutter and perform poorly in her speech.

Performance anxiety is a psychological phenomenon that affects individuals in various situations, including public speaking. It can lead to physical symptoms like stuttering and psychological distress that impairs performance.

To overcome performance anxiety, Jenny can practice her speech beforehand, use relaxation techniques, and seek support from teachers or a speech therapist.

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Jenny's situation of being nervous while giving a speech and performing poorly due to stuttering is an example of performance anxiety. This type of anxiety typically occurs when a person is performing in front of others and can result in physical reactions like stuttering. Methods of mitigating this anxiety include breathing exercises and practice.

This situation is an example of performance anxiety, which falls under the Psychology subject. Performance anxiety, or stage fright, often happens when individuals are required to perform in some way in front of others. This might include giving a speech, taking an exam, or playing a sport. When a person, like Jenny, becomes too anxious or nervous, they may have physical reactions like stuttering, sweating, or even forgetting their lines, all symptoms reflected in Jenny's situation.

Jenny's fear likely stems from her perception of the situation, including her expectations of herself and her fear of other people's perceptions. This could create a situation where she performs below her actual ability level. This type of anxiety, while common, can be mitigated with various techniques such as deep breathing exercises, visualization, and practice.

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Energy enters an apple through photosynthesis, where the apple tree captures solar energy and converts it into chemical energy, storing it as sugar within the apple.

The energy gets into the apple primarily through a process called photosynthesis. This process is essential for plants, allowing them to capture solar energy from the sun and convert it into chemical energy, which is stored in the form of sugars like glucose. Thus, the correct answer is: C. The apple tree stores energy from the Sun in the apple as sugar.

Through photosynthesis, plants absorb solar energy and use it to transform carbon dioxide and water into glucose, which is a simple sugar, and oxygen. The energy from the sun is stored in the chemical bonds of the glucose molecules. Later, this energy can be accessed by organisms that consume the plants, including humans when they eat plant products like apples.

Final answer:

Energy enters the apple through the process of photosynthesis, where the apple tree captures solar energy and stores it as sugar in its fruits, such as apples. So the correct option is C.

Explanation:

Energy gets into the apple primarily through the process of photosynthesis. The apple tree uses solar energy from the sun to convert carbon dioxide and water into glucose and oxygen. This chemical reaction captures the radiant energy in sunlight and converts it into stored chemical energy in the form of sugars, such as glucose, which accumulates in the fruits of the plant, including apples. Therefore, the correct answer to how energy gets into the apple in the first place is:

Answer:

2 2/3 m/s²

Explanation:

Acceleration is a measure of change in speed over time. What it means mathematically is the difference between your ending and starting speed divided by the total time between.

Here, our starting speed is 5 m/s and our ending speed is 13 m/s, so our change in speed is 13 m/s - 5 m/s = 8 m/s, and our total time between is 3 s, so that gives us an acceleration of (8 m/s) / (3 s), which is 8/3 m/s², or 2 2/3 m/s²

(A little note: m/s² is just an abbreviation for m/s/s, or "meters per second per second," and you read it as "meters per second squared")

Answer:

1.45 K

I had the same question and i got it right.

Answer:

T = 1.45 K

Explanation:

As per Wein's law we know that

[tex]\lambda = \frac{2.9 \times 10^6 nm K}{T}[/tex]

here we know that

[tex]\lambda[/tex] = wavelength of peak intensity

[tex]T [/tex] = temperature of the object

so as per above formula we know that

[tex]\lambda = 2 \times 10^6 nm[/tex]

so we have

[tex]2 \times 10^6 = \frac{2.9 \times 10^6 nm K}{T}[/tex]

[tex]T = 1.45 K[/tex]

Answer:

(A) burning wood

Explanation:

Burning of wood is the only combustion reaction we have listed among the options.

Combustion is an exothermic reaction in that heat is released to the environment. Combustion usually occurs in the presence of oxygen. In this reaction, a fuel source, the wood reacts with oxygen to produce heat energy and some other products.

Answer:

A. Burning wood

Explanation:

Answer:

Changing "Mass" to "Amount of electric charge"

"The correct change to correct the error in Badri's table is changing ""Mass"" to ""Amount of electric charge.""

To understand why this change is necessary, let's review the factors that affect the electric force between objects according to Coulomb's Law:

Coulomb's Law states that the electric force (F) between two point charges is directly proportional to the product of the magnitudes of the charges [tex](q_1 ~and~ q_2)[/tex], and inversely proportional to the square of the distance (r) between their centers. Mathematically, this is expressed as:

[tex]\[ F = k \frac{|q_1 q_2|}{r^2} \][/tex]

where k is Coulomb's constant[tex](\( 8.9875 \times 10^9 \) Nm^2/C^2).[/tex]

From Coulomb's Law, we can see that the electric force is affected by:

1. The amount of electric charge on each object [tex](q_1 ~and~ q_2)[/tex],: The force is directly proportional to the product of the charges, meaning that if the charge on either object increases, the force increases, and vice versa.

2. The distance between the charges (r): The force is inversely proportional to the square of the distance between the charges, meaning that as the distance increases, the force decreases, and as the distance decreases, the force increases.

Mass is not a factor in Coulomb's Law for electric force; it is a factor in Newton's Law of Universal Gravitation, which describes the gravitational force between two masses. Therefore, the table should reflect that the amount of electric charge has a direct relationship with the electric force, not mass.

The corrected table should look like this:

| Factor | Relationship to Electric Force |

|---------------|---------------------------------|

| Distance | Inverse |

| Amount of electric charge | Direct |

This correction aligns with the principles of Coulomb's Law and accurately reflects the factors that influence the electric force between objects."

Answer:

2.21

Explanation:

At STP, 1 mol of gas has a volume of 22.4 L, so we know we're starting with 1 mol of gas.

Assuming the temperature and volume are held constant, the number of moles needed to reach 325 kPa is found with ideal gas law:

PV = nRT

(325,000 Pa) (0.0224 m³) = n (8.314 Pa m³ / mol / K) (273.15 K)

n = 3.21 mol

Since we started with 1 mol, we need to add 2.21 mol.

According to the Avogadro's law, 2.2075 mole are needed to be added to the container to make the pressure equal to 325 kPa.

Avogadro's law is a gas law which states that the total number of atoms or molecules has a direct proportion to the volume occupied by a gas at a constant temperature and pressure.

It is closely related to ideal gas equation as it links temperature, pressure, volume and the amount of substance.It is given as, V∝n,

The straight line graph of volume versus moles is a straight line passing through the origin which implies that zero moles of gas occupy zero volume.

As 1atm=101.325 kPa so, 325 kPa=325/101.325=3.2075 atm,as at STP 1 atm=22.4 liter.

Applying Avogadro's law, n₂=71.848×1/22.4=3.2075 moles .In order to find moles to be added , 3.2075-1= 2.2075 moles.

Thus, 2.2075 moles of gas are to be added to the container to make the pressure equal to 325 kPa.

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Answer:

A plane mirror forms a virtual, erect, same size and laterally inverted image. Virtual means that the image is not real and cannot be obtained on screen. It means the rays appear to meet behind the mirror but when you will actually go behind, you will find nothing. A virtual image is always erect.

A real image is always inverted. It can be obtained on the screen. Rays actually meet at a point.

A virtual image in a plane mirror appears to be behind the mirror because the light rays do not actually converge there. You can see and photograph a virtual image, but it cannot be projected onto a screen.

The word “virtual” refers to something that exists in effect but not in actual fact. In the context of a plane mirror, a virtual image is one where the light rays appear to diverge from a point behind the mirror, but they do not actually meet there. When you look at yourself in a plane mirror, the image you see is indeed a virtual image because it appears to be behind the mirror where light does not truly exist. The rays of light reflecting off your face diverge and appear to the observer as if they are coming from a point behind the mirror.

Answer:

54 N

Explanation:

Draw a free body diagram.  There are four forces acting on the balloon.  Buoyant force pushing the balloon up, gravity pulling the helium down, gravity pulling the balloon skin down, and gravity pulling the load down.

Apply Newton's second law:

∑F = ma

B − Wh − Wb − L = ma

When the load is at a maximum, the acceleration is 0:

B − Wh − Wb − L = 0

B − Wh − Wb = L

B − mh g − Wb = L

The mass of the helium is its density times its volume:

B − ρh Vh g − Wb = L

Buoyant force is defined as B = ρVg, where ρ is the density of the displaced fluid (in this case, air), V is the volume of the displaced fluid, and g is acceleration of gravity.  Since the volume of displaced air = the volume of the helium:

ρa V g − ρh V g − Wb = L

(ρa − ρh) V g − Wb = L

Given that ρa = 0.90 kg/m³, ρh = 0.178 kg/m³, V = 20 m³, g = 9.8 m/s², and Wb = 88 N:

(0.9 − 0.178) (20) (9.8) − (88) = L

L = 53.5 N

Rounded to 2 sig-figs, the maximum load that can be supported is 54 N.

Answer:

81.8 m/s

Explanation:

The initial velocity of the plane is:

[tex]v_0=115 m/s[/tex] (toward east)

So, decomposing along the x- and y- directions:

[tex]v_{x0} = 115 m/s\\v_{y0} = 0[/tex]

(we took east as positive x-direction and north as positive y-direction)

The acceleration is

[tex]a=2.88 m/s^2[/tex] (northwest, so the angle with the positive x-direction is 135 degrees)

Decomposing it along the two directions:

[tex]a_x = a cos 135^{\circ} = (2.88 m/s^2)(cos 135^{\circ})=-2.04 m/s^2\\a_y = a sin 135^{\circ} = (2.88 m/s^2)(sin 135^{\circ})=2.04 m/s^2[/tex]

So the two components of the velocity after a time t = 25.0 s will be

[tex]v_x = v_{x0} + a_x t = 115 m/s + (-2.04 m/s^2)(25.0 s)=64 m/s\\v_y = v_{y0} + a_y t = 0 m/s + (2.04 m/s^2)(25.0 s)=51 m/s[/tex]

So, the magnitude of the velocity of the plane will be

[tex]v=\sqrt[v_x^2+v_y^2}=\sqrt{(64 m/s)^2+(51 m/s)^2}=81.8 m/s[/tex]

Answer:

low risk for tissue damage

uses radio waves

the last three are not correct

:)

Answer:

low risk for tissue damage

no radiations

Explanation:

MRI = magnetic resonance Imaging

Ultrasound

These are two process by which we can find the damaged tissues and and their position. These methods are used in medical science and hence these process must be safe to use.

As we know that all electromagnetic radiations are not good for humans as they are of high energy range so here in order to avoid this all we use the phenomenon of resonance to find out the situation of damaged cells or tissues in the body.

So correct answers are

low risk for tissue damage

no radiation

Answer:

0.24 kg used up

Explanation:

He has a mass of 67 kg

The gravitational constant is 9.81 m/s^2

The distance upward is 3500 m

W = m*g*h

W = 67 * 9.81 * 3500

Work = 2,300,445 Joules

Work = 2300 kj

work = 2.30 * 10^6 joules in scientific notation.

Part B

He needs 4 times this amount to climb the mountain because the body is only 25% efficient in converting energy.

4*2.30 * 10^6 = 9.20 * 10^6 Joules of energy are therefore required.

The total amount in a kg of fat = 3.8 * 10^7 joules

x kg of fat is needed to provide 9.20.*10^6 joules

1 kg / (3.8 * 10^7 J ) = x kg / (9.20 * 10^6 J)

9.20 * 10 ^6 * 1 = 3.8 * 10^7 *x

9.20 * 10 ^6 / 3.8 * 10^7 = x

x = 0.24 kg of fat are needed