Which two energy transformations are taking place as the dog slides?
A. Potential energy
B. Mechanical energy
kinetic energy
1
chemical energy
C. Kinetic energy electromagnetic energy
D. Potential energy - thermal energy
SUBMIT

For an 85 kg man walking on a treadmill at a speed of 2.8 mph with a 6% grade, we can calculate both the relative and absolute VO2 values. Similarly, for a 65 kg woman running on a treadmill at a speed of 6.0 mph with a 2% grade.

1. For an 85 kg man walking on a treadmill at a speed of 2.8 mph with a 6% grade:

Relative VO2:

\(\[\text{{VO}}2_{\text{{relative}}} = 3.5 + 0.1 \times \text{{speed}} + 1.8 \times \text{{speed}} \times \text{{grade}}\]\[\text{{VO}}2_{\text{{relative}}} = 3.5 + 0.1 \times 2.8 + 1.8 \times 2.8 \times 0.06\]\[\text{{VO}}2_{\text{{relative}}} \approx 7.33 \, \text{{ml/kg/min}}\]\)

Absolute VO2:

\(\[\text{{VO}}2_{\text{{absolute}}} = \text{{VO}}2_{\text{{relative}}} \times \text{{body weight}}\]\[\text{{VO}}2_{\text{{absolute}}} = 7.33 \times 85\]\[\text{{VO}}2_{\text{{absolute}}} \approx 622.05 \, \text{{ml/min}}\)

2. For a 65 kg woman running on a treadmill at a speed of 6.0 mph with a 2% grade:

Relative VO2:

\(\[\text{{VO}}2_{\text{{relative}}} = 3.5 + 0.1 \times \text{{speed}} + 1.8 \times \text{{speed}} \times \text{{grade}}\]\[\text{{VO}}2_{\text{{relative}}} = 3.5 + 0.1 \times 6.0 + 1.8 \times 6.0 \times 0.02\]\[\text{{VO}}2_{\text{{relative}}} \approx 12.37 \, \text{{ml/kg/min}}\]\)

Absolute VO2:

\(\[\text{{VO}}2_{\text{{absolute}}} = \text{{VO}}2_{\text{{relative}}} \times \text{{body weight}}\]\[\text{{VO}}2_{\text{{absolute}}} = 12.37 \times 65\]\[\text{{VO}}2_{\text{{absolute}}} \approx 803.05 \, \text{{ml/min}}\]\)

These calculations provide the values for both the relative and absolute VO2 for the given scenarios. The relative VO2 is expressed in milliliters per kilogram per minute (ml/kg/min), and the absolute VO2 is given in milliliters per minute (ml/min).

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Answer:

Suppose the micrometeoroid weighed 1 g = .001 kg

Suppose also the spacecraft were moving at 18,000 mph (1.5 hrs per rev)

Usually, the smaller particle would be moving but for simplicity suppose that it were stationary wrt the ground

v = 18000 miles / hr * 1500 m/mile / 3600 sec/hr = 7500 m/s

KE = 1/2 * .001 kg * (7500 m)^2 = 28,125 Joules

One can see that 28000 Joules could be damaging amount of energy

Answer:

1. I would like to change the time of distraction. Because 8 s is a long time to be distracted while driving on the road. Its not safe for the driver and the other people on road if the driver is distracted even for a second.

2. s₁ = 80 m

3. s₂ = 5 m

4. t = 1.25 s

5. s₃ = 7.5 m

6. s = 92.5 m    

Explanation:

1.

I would like to change the time of distraction. Because 8 s is a long time to be distracted while driving on the road. Its not safe for the driver and the other people on road if the driver is distracted even for a second.

2.

Distance Covered While Distracted = s₁ = (speed of car)(distraction time)

s₁ = (10 m/s)(8 s)

s₁ = 80 m

3.

Distance Covered While Reacting = s₂ = (speed of car)(reaction time)

s₂ = (10 m/s)(0.5 s)

s₂ = 5 m

4.

Using 1st equation of motion braking motion:

Vf = Vi + at

where,

Vf = Final Speed = 0 m/s

Vi = Initial Speed = 10 m/s

a = acceleration = - 8m/s²

t = ?

Therefore,

0 m/s = 10 m/s + (-8m/s²)t

t = (10 m/s)/(8 m/s²)

t = 1.25 s

5.

Now, using second equation of motion:

Distance Covered While Braking = s₃ = Vi t + (1/2)at²

s₃ = (10 m/s)(1.25 s) + (1/2)(-8m/s²)(1.25 s)²

s₃ = 12.5 m - 5 m

s₃ = 7.5 m

6.

Total Distance = s = s₁ + s₂ + s₃

s = 80 m + 5m + 7.5 m

s = 92.5 m

Answer:

l

Explanation:

Answer:

true I believe

Explanation:

Answer:

The answer is below

Explanation:

1) The resultant force of two forces acting in the same direction is equal to the sum of the two magnitudes. Therefore:

Resultant force = 10N + 7N = 17 N

2) The resultant force(R) between two forces A and B at an angle θ is given by:

\(R=\sqrt{A^2+B^2+2ABcos\theta} \\\\R=\sqrt{7^2+10^2+2(7)(10)cos(60^o)} =14.8^o\\\\\)

3) The resultant force (R) between perpendicular forces (90°) A and B is given by:

\(R=\sqrt{A^2+B^2}\\ \\R=\sqrt{7^2+10^2}=12.2\ N\)

Answer: For example, if you drop a water balloon onto the ground, its kinetic energy is converted mostly to thermal energy.

Explanation: When the temperature of an object increases, the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.

The molar mass of the unknown gas is approximately 44.07 g/mol. The molar mass of the unknown gas can be calculated using Graham's law of effusion, which states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass.

By using the given data, we can set up a proportionality equation where the ratio of the rates of effusion for the two gases (unknown gas and nitrogen gas) is equal to the square root of the ratio of their molar masses.

The equation can be written as:

Rate of effusion of nitrogen gas / Rate of effusion of unknown gas = √(Molar mass of unknown gas / Molar mass of nitrogen gas)

Substituting the given values, we get:

48 s / 63 s = √(Molar mass of unknown gas / 28 g/mol)

Simplifying and solving for the molar mass of the unknown gas, we get:

Molar mass of unknown gas = 28 g/mol x (48/63)^2 = 20.6 g/mol

Therefore, the molar mass of the unknown gas is approximately 20.6 g/mol.

In explanation, the effusion experiment measures the rate of gas escaping through a small opening in a container. The unknown gas is compared to nitrogen gas, which has a known molar mass of 28 g/mol. By using Graham's law of effusion, we can calculate the molar mass of the unknown gas. The equation relates the rate of effusion of each gas to its molar mass, and by setting the two ratios equal, we can solve for the unknown molar mass.

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To determine the amount of current flowing through the circuit, we need to consider Ohm's Law, which states that current (I) is equal to the ratio of electromotive force (E) to the resistance (R) in the circuit. The formula for this relationship is I = E/R.

However, in your question, only the total electromotive force (E) is given as 4.0V, but the resistance (R) is not provided. Without the value of resistance, we cannot calculate the current directly.

To find the current flowing through the circuit, we need to know the resistance value. Once we have the resistance value, we can use Ohm's Law to calculate the current by dividing the electromotive force by the resistance.

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Answer:

A. 50 m/s

Explanation:

Given in the y direction:

v₀ = 0 m/s

a = 10 m/s²

t = 4 s

Find: v

v = at + v₀

v = (10 m/s²) (4 s) + 0 m/s

v = 40 m/s

In the x direction, the velocity is constant at 30 m/s.

The overall speed is:

v² = (30 m/s)² + (40 m/s)²

v = 50 m/s

The answer:

A) 50 m/s

Answer:

d. Is indicated when a magnetometer measures intervals of magnetism that are weaker than expected

Explanation:

Magnetic field intensity is measured with a magnetometer on the surface of the Earth. Areas in which the magnetic field strength is lower or more than average are known as areas with magnetic anomalies, which may be due to  the presence of rocks that have a different magnetic characteristics

Where the magnetic anomaly is negative, it is indicative of a magnetic field strength reading that is lower than average magnetic field which is generally obtainable

Therefore, the correct option is indicated when a magnetometer measures intervals of magnetism that are weaker than expected

One movement is walking. A skill we use is writing. Another movement is blinking. Another skill we use with muscles is typing. And finally, another skill we use muscles during is brushing your teeth.

The moment caused by the 2 kg mass placed at a distance of 0.5 m to the left of the pivot is 1 kg m. This moment is anticlockwise.

Moment is a physical parameter equal to the product of the distance or displacement and another physical quantity such as mass, force etc.

For a mass of 2 kg and distance of 0.5 m the moment is  :

moment = mass × distance

= 2 × 0.5 = 1 kg m

If we are taking the moment of force, then it the product of the distance and force acting on the body is taken.

force = mg

F =  2 kg × 9.8 m/s² = 19.6 N

then moment of force = 19.6 N × 0.5 m = 9.8 N

The moment from left to right in direction is anticlockwise.

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Answer:

Velocity.

Explanation:

It is given that, the officer reports that the suspect is traveling north at 100 miles per hour. It means the suspect covers a distance of 100 miles every hour and moving in North direction.

It shows the velocity of the suspect. This is because his speed and direction are given. Velocity is a vector quantity.

So, the officer has reported the suspect's velocity.

Answer:

The magnitude of the emf induced in the loop is 2.4 × 10⁻⁵ V

Explanation:

The magnitude of the induced emf of a loop moving relative to a wire is given as follows;

The given parameters are;

I = 50 A, a = 50 cm, and b = 6.0 cm

The constant rate of change of x, v = 20 cm/s

Motional emf formula

The magnetic field due to the straight wire, B = μ₀·i/(2·π·x)

The flux given by the rectangular loop, Ф = BA =  μ₀·i/(2·π·x) × a × b

Therefore, we get;

\(e = \dfrac{-d\phi}{dt} = \dfrac{-\mu_0 \cdot i \cdot a\cdot b}{2 \cdot \pi} \times \dfrac{d}{dt} \left (\dfrac{1}{x} \right ) = \dfrac{-\mu_0 \cdot i \cdot a\cdot b}{2 \cdot \pi} \times \left (\dfrac{1}{x^2} \right ) \dfrac{dx}{dt}\)

\(\because \dfrac{dx}{dt} = v\)

Therefore;

\(e = \dfrac{-\mu_0 \cdot i \cdot a\cdot b}{2 \cdot \pi} \times \left (\dfrac{1}{x^2} \right ) \dfrac{dx}{dt} = \dfrac{-\mu_0 \cdot i \cdot a\cdot b}{2 \cdot \pi} \times \left (\dfrac{1}{x^2} \right ) \times v \left(\because \dfrac{dx}{dt} = v \right)\)

μ₀ = 4·π × 10⁻⁷ H/m

We get;

\(e = \dfrac{4\cdot \pi \times 10^{-7} \, H/m\times50 \, A \times 0.5 \, m\times 0.06 \, m}{2 \cdot \pi} \times \left (\dfrac{1}{(0.05 \, m)^2} \right ) \times 0.2 \ m/s = 2.4 \times 10^{-5} \, V\)

The induced emf, e = 2.4 × 10⁻⁵ V

Answer: 0

Explanation:

75 newtons will push back canceling it out make it 0

If I push on the wall with 75 Newtons of force, the wall will push back with 75 Newtons of force.

Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.

It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.

The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.

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The reason behind circular motion at constant speed is not a natural state of motion is centripetal acceleration acting on it.

Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any item travelling in a circle with an acceleration vector pointing in the direction of the circle's center.

A natural state of motion is that motion where object moves with constant velocity and no acceleration. As  in circular motion of  an object at constant speed, a constant centripetal acceleration remains, this is not a natural state of motion.

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Answer:

this is because gravity is pulling both objects down to the ground and hence they are falling. Both objects have the same mass and weight but the resultant force of the paper ball is smaller than that of the unfolded paper. The unfolded paper has a larger surface area and so a larger force is acted upon it, meaning there is more air resistance. This shows that the paper ball falls faster than the unfolded paper.

Explanation:

hope this helps!!

The force against motion can make the air resistance higher. For the flat sheet of paper the gravitational force is less because of its surface area and lower centre of mass.

Force is an external agent that changes a body from the state or rest or motion. Higher the mass of the body at rest higher will be the force applied to move it on.

The gravitational force by earth make every falling body hit to the ground. A plane sheet or paper have more surface area through which the air can travel easily. Hence, the air resistance to its motion will be higher and it takes more time to fall.

In the case of folded paper as the centre of mass is increasing here and its experience more gravitational pull make opposes the force by air resistance and it hit the ground fastly upon falling than the flat sheet.

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Answer:

down below

Explanation:

I assume you're asking about it's orbit around the sun. I believe the Earth's orbit around the sun would be shorter. If the Earth sped up, one can assume that means the days are shorter and the rate at which the Earth orbits the sun would also speed up.

This sounds like an open ended question, so I don't think there can be a wrong answer.

Hope this helps! :)

The correct frequency of electromagnetic radiation has photons of energy 4.7 × 10⁻²⁵ . The Option c is correct.

A more detailed explanation of the answer.

Electromagnetic radiation refers to waves of energy that are produced by the movement of charged particles. It comprises a wide spectrum of wavelengths, including radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Electromagnetic radiation is capable of traveling through a vacuum, as well as a variety of substances.

In physics, a photon is an elementary particle that is the basic unit of all light. It is the quantum of the electromagnetic field, a concept that refers to the movement of photons that create electromagnetic waves. The energy carried by a single photon is referred to as photon energy.The formula to calculate the photon energy is:

E = hf

where E is photon energy, h is Planck's constant, and f is frequency of radiation.

From the formula we can calculate the frequency of electromagnetic radiation having photons of energy 4.7 × 10⁻²⁵ as follows:

E = hfE = 4.7 × 10⁻²⁵h = 6.626 × 10⁻³⁴J.s (Planck's constant)

f = E / h = (4.7 × 10⁻²⁵) / (6.626 × 10⁻³⁴)= 710.0684 x 10⁹ Hz≈ 710 MHz

Therefore, the correct frequency of electromagnetic radiation having photons of energy 4.7 × 10⁻²⁵ is c. 710 MHz.

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the height of the image of the insect will be the same as the height of the insect, but with a negative sign.

To determine the height of the image of the insect formed by a lens with a focal length of f = -125 mm, we need to apply the sign conventions used in lens imaging.

In the sign convention:

Distances measured from the lens towards the object are positive.

Distances measured from the lens towards the image are negative.

Focal length (f) is positive for a converging lens (convex) and negative for a diverging lens (concave).

Since the given focal length is f = -125 mm (negative value), we know that we are dealing with a diverging lens.

When an object is placed in front of a diverging lens, the resulting image is virtual, upright, and located on the same side as the object. The image formed by a diverging lens is always reduced in size compared to the object.

Since the image is virtual and upright, the height of the image will have the same magnitude as the height of the object, but it will be negative to indicate that it is located on the same side as the object.

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ω-transaminase is more selective in the synthesis of amino acid, while normal transaminase is less selective.

Transaminase is an enzyme that transfers an amine group from an amino acid to an α-keto acid, resulting in the conversion of an amino acid to a different amino acid. The ω-transaminase differs from normal transaminase in the selectivity of amino acids synthesized.ω-transaminase is a narrow-range enzyme and is often used to synthesize enantiomerically pure amino acids. Normal transaminase is less selective, synthesizing a variety of amino acids in the reaction.

Way of production of ω-transaminase and normal transaminase: The ω-transaminase and normal transaminase are often produced using genetic engineering techniques. Production methods include mutation, immobilization, or in vitro recombination.

Mutation: Genetic mutations can be introduced to generate ω-transaminase from normal transaminase.Immobilization: Both ω-transaminase and normal transaminase can be immobilized in the matrix to facilitate recovery and reuse of enzymes.

In vitro recombination: In vitro recombination can also be used to produce ω-transaminase.

ω-transaminase is more selective than normal transaminase in the synthesis of amino acids. Both enzymes can be produced through genetic engineering techniques such as mutation, immobilization, or in vitro recombination.

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The bird has the most potential energy when it is at the highest point of its dive into the ocean.

1. Potential energy is the energy possessed by an object due to its position or state.

2. In this case, we are considering the potential energy of a bird diving into the ocean.

3. The potential energy of an object depends on its height and mass.

4. When the bird is at the highest point of its dive, it has the maximum potential energy.

5. As the bird dives deeper into the ocean, its height decreases, resulting in a decrease in potential energy.

6. At the moment the bird reaches the surface of the water, its potential energy is at its minimum, as it is at its lowest height.

7. The potential energy is converted into kinetic energy as the bird accelerates towards the water.

8. Kinetic energy is the energy possessed by an object due to its motion.

9. When the bird enters the water, its potential energy is completely converted into kinetic energy.

10. The bird continues to possess kinetic energy as it moves through the water.

11. Once the bird comes to a stop in the water, its kinetic energy is reduced to zero.

12. At this point, the bird's potential energy is also zero, as it is at its lowest height and not in motion.

13. Therefore, the bird has the most potential energy when it is at the highest point of its dive into the ocean.

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Answer:

43.58kg

Explanation:

The equation F=ma will help here.

F=ma

523N=m(12m/s^2)

43.58kg=m

The speed ratio of particle A to particle B is approximately 2.83.

The kinetic energy of a particle is given by the formula KE = (1/2)mv^2, where m is the mass of the particle and v is its speed.

Given that particle A has half the mass and eight times the kinetic energy of particle B, we can write:

(1/2)mAvA^2 = 8(1/2)mBvB^2

Simplifying, we get:

mAvA^2 = 4mBvB^2

Dividing both sides by mBvB^2, we get:

(mA/mB)(vA/vB)^2 = 4

Since mA/mB = 1/2, we can substitute and solve for the speed ratio:

(1/2)(vA/vB)^2 = 4

vA/vB = sqrt(8)

vA/vB ≈ 2.83

Therefore, the speed ratio of particle A to particle B is approximately 2.83.

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The equivalent resistance of the circuit will be option (D) 80.0 Ω

According to Ohm's law, the voltage across two places is precisely proportional to the current flowing through a conductor between them.

The obstruction to current flow in an electrical circuit is measured by resistance. The Greek letter omega (Ω) represents the unit of measurement for resistance, known as ohms. Georg Simon Ohm is the name given to ohms.

Since in the given figure the resistance are in series so there equivalent resistance will be sum of the two resistance. If they were in parellal connection then we will add reciprocal of their resistance.

Let R1 = 60 Ω and R2 = 20 Ω. So their equivalent resistance will be as follow:

R = R1 + R2

R = 60 + 20

R = 80 Ω

Hence the equivalent resistance of the circuit will be 80 Ω

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