Big fish swim substantially faster than small fish, while big birds fly faster than small ones. However, the speeds of runners vary a lot less with body size, although big ones do go somewhat faster, never mind a lot of highly unreliable top speed data. Some general scaling rules might help. Assume that the cost of transport (cost per distance) varies with body mass^0. 68, that the maximum metabolic rate varies with body mass^0. 81, and that efficiencies and so forth don't vary with body size. How many times faster should a 450 kilogram bear be able to run than the top speed of a 45gram rodent

Answer:

The Tesla moves approx. 25 meters from rest before reaching 60 mi/hr

Explanation:

Given:

Initial velocity = 0 m/s

Final velocity = 26.8 m/s

Time = 1.9 seconds

Acceleration = change in velocity/time

\(a = \frac{26.8}{1.9}\)

The equation to find displacement (Δx) with given starting and final velocity, time, and acceleration is:

\(x = x_{0} + v_{0}t + \frac{1}{2} at^{2}\)

Starting position and initial velocity both equal 0, so

\(x = \frac{1}{2} at^{2}\)

\(x=\frac{1}{2} (\frac{26.8}{1.9})(1.9)^{2}\)

x = 25.46m

Rounded to the nearest whole number, x = 25m

Answer:

ITS 20

Explanation:

C. Optical telescopes are used to study visible light from objects in space.

Answer:

Optical telescopes are used to study visible light from objects in space

Answer:

B

Explanation:

Answer:

B

Explanation:

In contrast to other fish, who have bladders filled with gas, sharks have a liver filled with low-density oil that is similar to vegetable oil. This oil is lighter than water and tends to rise to the top of the water if not contained but because it is in the sharks liver its contained therefor the shark floats!

The amount of energy that is transferred by a force acting through a distance is known as work.

If we apply a force on an object, this force transforms into kinetic motion and distance is moved by the object. When there is displacement due to this force, work is said to be done.

Work is actually the transfer of mechanical energy from one substance to another. As work is the result of the transfer of energy, it has the same unit as energy, i.e., joule.

When work is done, the kinetic energy of the object is changed, or it has altered potential energy. Potential energy may change into kinetic energy due to the application of force. If position or shape is changed due to force, then we have altered potential energy.

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Explanation:

The clowns need to leave the diving boards with enough horizontal velocity such that each travels 15 m (half the width of the pool) in the same time that they fall (vertically) the 10-m from the top of the diving board.

We'll assume no force acts on the clowns horizontally to slow them down while they are in flight. And we'll assume that only gravity acts on the clowns vertically.

We can treat the horizontal and vertical components separately. This will help simplify the problem.

Let's start with the vertical displacement. Let's say the clown is dropped from a height of 10-m. How long would it take them to fall that distance?

Using our equations of motion (with constant, linear acceleration), we can solve for this time. \(d = vt + \frac{1}{2} at^2\)

Where d is the distance travelled, v is the initial velocity, a is acceleration, and t is time.

If the clown is dropped, they have an initial velocity of 0 (zero). We assumed only gravity acts on the clown, so acceleration equals the gravitational acceleration on earth. \(a = 9.8m/s^2\)

The distance the clown travels is 10-m from the diving board to the surface of the water.

Let's solve. \(10 = 0*t + \frac{1}{2} (9.8) t^2 \rightarrow 20/9.8 = t^2 \rightarrow t = \sqrt{20/9.8}\)

Now that we know time, we can calculate how fast the clown needs to be running when they leap from the diving board to cover a distance of 15-m (Remember, half the width of the pool.)

Using our equations of motion, we know that \(d = vt + 0.5at^2\)

We assumed no forces act horizontally on the clown, therefore a = 0. We just need to solve for v. Substituting in the time we just solved for, we get something like this. \(15 = v \sqrt{20/9.8}\)

I'll leave it to you to solve this equation.

Answer:

a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically. An example is a predator-prey relationship. If there was no more prey the predators may began to fall ill and die and if there was no more predators the prey would eventually over populate  

Explanation:

Answer:

High current flow

Explanation:

Generally , the measuring instruments used by technician also have some resistance, though its value is very low  . So when high current is present in the circuit , that current also passes through the instrument which creates a good potential drop across the instrument . So the external voltage used in the circuit measures less voltage .

Answer:

e-can be absorbed and transformed into heat

Explanation:

Blue light has a greater frequency and carries more energy than red light when compared.

Electromagnetic frequencies that can be seen by human eyes make up visible light. This spectrum excludes ultraviolet and infrared radiation. The wavelengths and frequencies that an object reflects determine the colours we see. Both waves and particles of light exist. It has wave characteristics like amplitude, period, wavelength, and frequency.

The number of times a wave completes a cycle each second is known as its frequency. Hertz, or cycles per second, is the unit of measurement (Hz).

There is more energy in the light the higher the frequency. As a result, its wavelength shrinks.

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Answer:

When covalent compounds dissolve in water, they break apart into molecules, but not individual atoms. Water is a polar solvent, but covalent compounds are usually nonpolar. This means covalent compounds typically don't dissolve in water, instead, it makes a separate layer on the water's surface.

Explanation:

I don't understand the second part but hope this helps.

The rolling straight-edge, also known as a rolling straightedge or planograph, is a tool used to gauge the regularity of the surface of roads and other comparable constructions, such airport runways.

It comprises of a fixed-distance straightedge placed on wheels with a sensor in the center measuring height deviation.  A 2 m straight edge is positioned on the ground and supported by its own weight. The largest distance between the places of the straight edge's underside that are in touch with the floor should be measured. The 'go' and 'no go' strategy is used to accomplish this. With the use of a slip gauge, the measurements are collected.

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Answer:

Explanation:

Kinetic energy is the energy of movement. To find the kinetic energy, you need to...

1.) Check out the object mass and velocity from the question.

2.) Square the velocity value and multiply it with mass of the object.

3.) Divide the product by 2 to get the kinetic energy value.

The formulas to calculate kinetic energy is given by

Kinetic Energy = ½ * m * v²

m = (2 * KE) / v²

v = √((2 * KE) / m)

The "m" is mass, and the "v" is velocity, and the "KE" is kinetic energy.

Or where can you see Kinetic energy?! People who are moving, they can be sprinting, or jogging, or walking, or jumping, any type of movement.

Even you typing is kinetic energy since you are moving your hands to be able to type. Any little thing can be kinetic energy, if you're still, it's called potential energy since something remains at rest.

Hope this helped!

Have a supercalifragilisticexpialidocious day!

The electron drift speed in the wire is 4.10 x 10^-5 m/s.

The cross-sectional area of the wire can be calculated from the diameter:

A = πd²/4

Substituting the given values, we have:

A = π(0.710 mm)²/4 = 0.396 mm² = 3.96 x \(10^{-7\) m²

I = 50.0 mA = 50.0 x \(10^{-3\) A

n = 5.86 x \(10^{28\) electrons/m³ (for silver)

e = 1.6 x \(10^{-19\)C

(a) The electric field can be calculated from the electric current density as

J = I/A = (50.0 x \(10^{-3\) A)/(3.96 x \(10^{-7\) m²) = 126,263 A/m²

The current density is related to the electric field by Ohm's law:

J = σE, where σ is the electrical conductivity of silver.

Therefore, the electric field E can be found as:

E = J/σ = (126,263 A/m²)/(6.17 x \(10^7\) S/m) = 2.05 x \(10^{-3\) V/m

(b) The electron drift velocity can be calculated from the current density as:

v = J/ne = (126,263 A/m²)/(5.86 x \(10^{28\) electrons/m³ x 1.6 x \(10^{-19\)C/electron) = 4.10 x \(10^{-5\) m/s

Drift velocity refers to the average velocity of charge carriers (such as electrons) in a material when an electric field is applied to it. When a voltage is applied across a conductor, an electric field is generated inside the conductor which exerts a force on the charge carriers, causing them to move in the direction of the electric field. The drift velocity of these charge carriers is proportional to the magnitude of the electric field and the material's ability to conduct electricity.

In most materials, the charge carriers move randomly due to thermal energy, so their overall velocity is zero. However, when an electric field is applied, the carriers move in the direction of the field with a net average velocity known as drift velocity. The magnitude of the drift velocity is typically much smaller than the speed of the individual charge carriers, but it is essential for the operation of devices such as semiconductors, transistors, and diodes.

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Answer:B) Frequency

Explanation:

Answer:

B) Frequency

Explanation:

Answer:

Th ball

Explanation:

A photon is a quantum of light is the correct answer.

A photon is tiny packets of energy of electromagnetic radiation. This concept is presented by Albert Einstein in order to explain the photoelectric effect. Photon is also known as light quantum because it is related to light.

So we can conclude that photon is a quantum of light is the correct answer.

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Answer:

a quantum of light

Explanation:

I got it right on the test.

GPE = mgh

3.36 x 10⁹ J = m x 9.8 m/s² x 1.45 x 10³ m

m = 2.36 x 10⁵ kg

Answer:

70 km!

Explanation:

Hope this helps!

Answer:

the quantity which has both magnitude and direction is called vector quantity

Answer:

I think 1. is 17 and 2. is 600

Explanation:

sorry its been a while..

The work done is 6000J  

The product of a force's component acting in the displacement's direction and its magnitude is known as the work done by the force. Formula.

The following formula can be used to determine work by multiplying force and distance in the direction of the force. Unit: W = F d.

Given

Output work formula

L*Ld = 680*8 = 5440

Hence the output is 5440J  

Input work  

We know  

the input work formula is  

E*Ed

500*12= 6000J  

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Answer:

10 m/per second

Explanation:

he speeds up 10 m in a single second

Answer:

A

Explanation:

got it right on edge 2021 :)

The product needs to better solve the problem for which it was designed ( first option )

After testing the new technology on patients and it showed only 25% success rate ( very low success rate).  It is concluded that before Doctors can report that the new technology design is successful is when it better solves the problem for which it was designed for ( i.e. increase in the success rate to > 50% ). because for a procedure to be considered successful for deployment it will need to record a success rate of over 50% of the test patients.

Therefore the product needs to better solve the problem for which it was designed

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The correct option for the given question is D. Decreasing the mass of the box and releasing the ball from a higher point on the hill.

 A cardboard box was placed at the bottom of a hill, and a ball was released from a point on the hill. The box moved a distance of 2 meters before coming to rest, along with the ball. To move the box a greater distance, a change in the initial conditions is required. It can be achieved by decreasing the mass of the box and releasing the ball from a higher point on the hill.

According to the law of conservation of momentum, the total momentum before and after the collision is conserved. If the mass of the box is decreased, its momentum will be less after the collision. Therefore, the momentum of the ball will be greater than the momentum of the box, allowing it to move the box to a greater distance. Thus the correct option is Option D.

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A hydrogen atom can be excited from the n = 2 state to the n = 6 state with a wavelength of around 3.65 x 10⁻¹⁵ m.

To calculate the frequency of light emitted from a hydrogen atom during a transition, we can use the Rydberg formula:

\(\frac{1}{\lambda} = R_H \left( \frac{1}{n_f^2} - \frac{1}{n_i^2} \right)\)

where λ is the wavelength, R_H is the Rydberg constant for hydrogen (approximately 3.29 x 10¹⁵ Hz), \(n_f\) is the final state, and \(n_i\) is the initial state.

For the transition from n = 4 to n = 2, we have:

\(\frac{1}{\lambda} = 3.29 \times 10^{15} \, \text{Hz} \times \left(\frac{1}{2^2} - \frac{1}{4^2}\right)\)

\(\frac{1}{\lambda} = 3.29 \times 10^{15} \, \text{Hz} \times \left(\frac{1}{4} - \frac{1}{16}\right)\)

\(\frac{1}{\lambda} = 3.29 \times 10^{15} \, \text{Hz} \times \frac{3}{16}\)

\(\frac{1}{\lambda}\) = 1.21 x 10¹⁵ Hz

So, the frequency of light emitted during this transition is approximately 1.21 x 10¹⁵ Hz.

To calculate the energy difference \(Ef - Ei\), we can use the formula:

ΔE = \(E_i\) - \(E_f\)

where ΔE is the energy difference, \(E_i\) is the initial energy, and \(E_f\) is the final energy.

The energy of a hydrogen atom in a given state can be calculated using the formula:

\(E = \frac{-13.6 \, \text{eV}}{n^2}\)

For the transition from n = 7 to the ground state (n = 1), we have:

\(ΔE = \left(-\frac{13.6 \text{ eV}}{1^2}\right) - \left(-\frac{13.6 \text{ eV}}{7^2}\right)\)

      = -13.6 eV + 0.271 eV

      = -13.329 eV

So, the energy difference \(Ef - Ei\) is approximately -13.329 eV.

To calculate the wavelength of light that can excite a hydrogen atom from the n = 2 state to the n = 6 state, we can use the Rydberg formula as mentioned earlier:

\(\frac{1}{\lambda} = R_H \left( \frac{1}{n_f^2} - \frac{1}{n_i^2} \right)\)

For this transition, we have:

\(\frac{1}{\lambda} = 3.29 \times 10^{15} \text{ Hz} \left( \frac{1}{6^2} - \frac{1}{2^2} \right)\)

\(\frac{1}{\lambda} = 3.29 \times 10^{15} \text{ Hz} \left( \frac{1}{36} - \frac{1}{4} \right)\)

\(\frac{1}{\lambda} = 3.29 \times 10^{15} \text{ Hz} \left( \frac{3}{36} \right)\)

\(\frac{1}{\lambda}\)= 2.74 x 10¹⁴ Hz

Now, we can calculate the wavelength:

\(\lambda = \frac{1}{2.74 \times 10^{14} \text{ Hz}}\)

   = 3.65 x 10⁻¹⁵ m

So, the wavelength of light that can excite a hydrogen atom from the n = 2 state to the n = 6 state is approximately 3.65 x 10⁻¹⁵ m.

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Answer:

970 kN

Explanation:

The length of the block = 70 mm

The cross section of the block = 50 mm by 10 mm

The tension force applies to the 50 mm by 10 mm face, F₁ = 60 kN

The compression force applied to the 70 mm by 10 mm face, F₂ = 110 kN

By volumetric stress, we have that for there to be no change in volume, the total pressure applied by the given applied forces should be equal to the pressure removed by the added applied force

The pressure due to the force F₁ = 60 kN/(50 mm × 10 mm) = 120 MPa

The pressure due to the force F₂ = 110 kN/(70 mm × 10 mm) = 157.142857 MPa

The total pressure applied to the block, P = 120 MPa + 157.142857 MPa = 277.142857 MPa

The required force, F₃ = 277.142857 MPa × (70 mm × 50 mm) = 970 kN