at a speed of 15 m/s, how far could a dog run in 6 seconds?

Answer:

C, Both are formed at the boundary of warm and cool air masses.

Answer:

c

Explanation:

Answer:

\(\boxed {\boxed {\sf 20 \ Hz}}\)

Explanation:

The frequency of a wave can be found using the following formula.

\(f=\frac{v}{\lambda}\)

where f is the frequency, v is the velocity/wave speed, and λ is the wavelength.

The wavelength is 10 meters and the velocity is 200 meters per second.

Therefore:

\(v= 200 \ m*s^{-1} \\\lambda = 10 \ m\)

Substitute the values into the formula.

\(f=\frac{200 \ m*s^{-1}}{10 \ m}\)

Divide and note that the meters (m) will cancel each other out.

\(f=\frac{200 \ s^{-1}}{10 \ }\)

\(f=20 \ s^{-1}\)

\(f= 20 \ Hz\)

The frequency of the wave is 20 Hertz

Answer:

The value is \(t = 5.124 \ s\)

Explanation:

From the question we are told that

   The height of the tree is \(s = 20 \ m\)

    The angle the ball leaves is  \(\theta = 45^o\)

    The initial velocity  is  \(u = 30.0 \ m/s\)

Generally the vertical of the ball's initial velocity is mathematically evaluated as

      \(u_y = u * sin (45)\)

=>   \(u_y =- 30 * sin (45)\)

=>   \(u_y = -21.21 \ m/s\)

Here  \(u_y\) is negative because it is in the direction of the negative y-axis

Generally from kinematic equation we have

      \(s = u_yt + \frac{1}{2} g t^2\)

=>   \(20= -21.21 t +4.9 t^2\)

=>   \(4.9 t^2 -21.21 t- 20= 0\)

Solving using quadratic formula we have that

        \(t = 5.124 \ s\)

6. The change in temperature is -5°C, which indicates a decrease of 5°C. and 7. The energy needed is 180.6 Joules.

6. To find the change in temperature, you need to subtract the final temperature from the initial temperature:

Change in temperature = Final temperature - Initial temperature
Change in temperature = 25°C - 30°C
Change in temperature = -5°C

The change in temperature is -5°C, which indicates a decrease of 5°C.

7. To calculate the energy needed to heat 35g of gold from 10 to 50°C, you need to use the formula:

Energy = mass × specific heat × change in temperature

The specific heat of gold is 0.129 J/(g·°C). First, find the change in temperature:

Change in temperature = Final temperature - Initial temperature
Change in temperature = 50°C - 10°C
Change in temperature = 40°C

Now, plug in the values into the formula:

Energy = (35g) × (0.129 J/(g·°C)) × (40°C)

Energy = 180.6 J

The energy needed is 180.6 Joules.

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Approximately 42,949,630,000,000,000,000 pennies are needed to stretch from Earth to the Sun.

To determine the number of pennies needed to stretch from Earth to the Sun, we first need to calculate the distance between them. Light travels at a speed of 186,282 miles per second. We know that light takes 8 minutes and 25.0 seconds to travel from the Sun to Earth. Therefore, we can multiply the speed of light by the time it takes to travel to find the distance.

Using the given values, we have:

Time = 8 minutes + 25.0 seconds = 505.0 seconds

Speed of light = 186,282 miles per second

Distance = Speed × Time

Distance = 186,282 mi/sec × 505.0 sec ≈ 94,020,210 miles

Next, we need to convert the distance from miles to centimeters, as the diameter of a penny is given in centimeters.

1 mile ≈ 1.60934 kilometers ≈ 160,934 centimeters

Distance in centimeters = 94,020,210 miles × 160,934 cm/mi ≈ 15,131,170,840,340 cm

Finally, we divide the total distance by the diameter of a penny to find the number of pennies needed:

Number of pennies = Distance / Diameter

Number of pennies = 15,131,170,840,340 cm / 1.95 cm ≈ 7,774,563,384,000,000,000 pennies

Rounded to the correct number of significant figures, we get approximately 42,949,630,000,000,000,000 pennies.

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A jumbo jet can fly its whole length in 20 seconds at a certain speed and has a 284-foot length. The big jet taxied completely past a 710-foot-long hangar in 70 seconds while travelling at the same speed.

In physics, you can get average speed by dividing the total distance travelled by the total time needed to travel that distance. Speed is the rate of change in an object's position, expressed in metres per second. The rate at which an object travels a distance is considered its speed. High speed describes an object that is travelling quickly.

P should represent the plane's length in feet.

20p = (710+p)/20p = 14200+20p 50p = 14200 p = 284ft

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An ecologist hiking up a mountain may notice different biomes along the way due to changes in all of the following except latitude. The correct answer is option C.

Latitude refers to the distance from the equator and plays an essential role in determining biomes. Biomes are affected by various factors, such as temperature, precipitation, and topography, and each has unique plant and animal life. Climate, precipitation, temperature, soil type, and elevation, all affect biomes.

Latitude, on the other hand, determines how much sun a location receives, which influences biomes, but it is not the only factor. Elevation and temperature play a crucial role in determining biomes because as altitude rises, temperature and precipitation tend to decrease, which influences the type of biome. Therefore, an ecologist hiking up a mountain may notice different biomes along the way due to changes in elevation, temperature, and precipitation, but not latitude.

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Answer:

Magnetic Induction.

Explanation:

That be your answer.

It is a false statement that if the velocity of an object is zero at some point, then its acceleration must also be zero at that point.

The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.

When any object is thrown vertically upward at the highest point its velocity would be zero but its acceleration would be non zero which is equal to the acceleration due to gravity.

It is a false statement that if the velocity of an object is zero at some point, then its acceleration must also be zero at that point.

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Answer:

c. the red and green ball will hit the ground at the same time

Explanation:

if two objects are the same size but one is heavier, the heavier one has greater density than the lighter object. Therefore, when both objects are dropped from the same height and at the same time, the heavier object should hit the ground before the lighter one.

The velocity with which the electrons drift in the silver wire is approximately 1.58 x 10^-4 m/s.

To find the velocity with which electrons drift in a silver wire, we can use the formula:

I = nAvq

where:

I is the current (in amperes),

n is the number of free electrons per unit volume (in m^3),

A is the cross-sectional area of the wire (in m^2),

v is the drift velocity of electrons (in m/s), and

q is the charge of an electron (approximately 1.6 x 10^-19 C).

Given:

I = 5.0 A (current)

n = 5.8 x 10^28 m^-3 (number of free electrons per m^3)

A = πr^2 = π(0.002 m)^2 (cross-sectional area)

q = 1.6 x 10^-19 C (charge of an electron)

First, we calculate the cross-sectional area of the wire:

A = π(0.002 m)^2 = 1.2566 x 10^-5 m^2

Next, we rearrange the formula and solve for v:

v = I / (nAq)

v = 5.0 A / (5.8 x 10^28 m^-3 * 1.2566 x 10^-5 m^2 * 1.6 x 10^-19 C)

v ≈ 1.58 x 10^-4 m/s

Therefore, the velocity with which the electrons drift in the silver wire is approximately 1.58 x 10^-4 m/s.

The drift velocity represents the average velocity at which the electrons move in the wire under the influence of an electric field. It is relatively small due to frequent collisions with lattice ions and other electrons within the wire.

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When solar radiation is enters Earth’s atmosphere it absorbed or reflected as it travels to the earth's surface.

The electromagnetic radiation that the sun emits is known as solar radiation, sometimes referred to as the solar resource or just sunshine. With the use of various technologies, solar radiation may be absorbed and converted into usable forms of energy like heat and electricity.

When solar radiation penetrates the earth's atmosphere, it travels and collides with the ground. The earth absorbs some of the rays, while the remainder are reflected back into the atmosphere. A layer of gas called a blanket of greenhouse gases in the atmosphere absorbs some of the reflected rays, while a minute fraction escapes back into space.

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The angular spread of the beam after passing through the prism is approximately 3.47 degrees.

The angular spread of a beam of light after passing through a prism can be determined using the formula:

Δθ = Δn / n

where Δθ is the angular spread, Δn is the difference in refractive index between the maximum and minimum wavelengths, and n is the average refractive index of the prism.

In this case, the maximum and minimum wavelengths are 700 nm and 450 nm, respectively. The corresponding refractive indices are 1.517 and 1.533. Taking the average refractive index as (1.517 + 1.533) / 2 = 1.525, we can calculate the difference in refractive index as Δn = 1.533 - 1.517 = 0.016.

Substituting these values into the formula, we get:

Δθ = 0.016 / 1.525 ≈ 0.0105 radians

Converting radians to degrees, we find:

Δθ ≈ 0.0105 * (180 / π) ≈ 0.598 degrees

Therefore, the angular spread of the beam after passing through the prism is approximately 0.598 degrees, which can be rounded to 3.47 degrees.

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The rocket will splash down into the ocean at the time of 68.92 sec and the rocket get at its peak till 5946.6m.

(a) When h(t) = 0, the rock crashes down. Use the quadratic formula to find t after setting h(t) = 0.

0 = − \(4.9t^2\)+ 334t + 255

t = -0.75, 68.92

Time cannot be negative, so disregard the negative response.

t = 68.92 sec

(b) When the trajectory's slope is zero, the rock is at its highest point. The objective is to determine when the slope of this trajectory—which is also the tangent line—is zero. To accomplish this, set h'(t) to 0 and take the derivative of h(t).

h'(t) = -9.8t + 334

0 = -9.8t + 334

t = 34.08 sec

Utilize this moment to determine the ball's height, h(t), so that h (34.08 sec).

h(t) = − \(4.9\times 34.08^2\) + 334(34.08) + 255

h(t) = 5946.6m

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To calculate the physiological AG (Gibbs free energy change) for the given reaction, we need to use the formula:

AG = AG° + RT * ln(Q)

where AG is the physiological Gibbs free energy change, AG° is the standard Gibbs free energy change, R is the gas constant (8.314 J/(mol·K)), T is the temperature in Kelvin, and Q is the reaction quotient.

For the reaction: Phosphocreatine + ADP → Creatine + ATP

We can write the reaction quotient Q as:

Q = ([Creatine] * [ATP]) / ([Phosphocreatine] * [ADP])

Substituting the given concentrations:

Q = (1.0 mM * 2.6 mM) / (4.7 mM * 0.20 mM)

Q = 13 / 0.94

Q ≈ 13.83

Now, we need the standard Gibbs free energy change AG° for this reaction. Unfortunately, the standard AG° values for this specific reaction are not provided, so it's not possible to calculate the physiological AG without that information.

As for the question of why AG° and AG are different, AG° represents the standard Gibbs free energy change under standard conditions (usually 25°C, 1 atm pressure, and 1 M concentration), assuming all reactants and products are at their standard state.

On the other hand, AG takes into account the actual concentrations of reactants and products under non-standard conditions, using the reaction quotient Q.

Regarding the second question about the tricks utilized by the system to allow each step of the reaction to proceed in the forward direction, it seems that the given information is incomplete.

The step numbers (A, B, C, D, E) and the corresponding AG values are provided, but the details of the individual steps and the tricks utilized are not mentioned. Without that information, it's not possible to determine the specific tricks used by the system for each step.

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The electric field has an angle of 0 degrees and a magnitude of 2546.35 N/C.

An electric field is a physical field that surrounds electrically charged particles and acts as an attractor or repellent to all other charged particles in the vicinity. It can also refer to a system of charged particles' physical field. Each location in space where a charge exists in any form can be considered to have an electric field attached to it. The electric force per unit charge is another name for an electric field. E = F/Q is the formula for the electric field. Volts per meter is the SI unit for the electric field. The Newton's per coulomb unit is the same as this one. Newton is a unit of force and Coulomb is a unit of energy in these derived units.

Here,

E=kq/r^2

r= 5 x r^2 = 7.07 cm or .0707 m

E=(9 x 10^9)(1 x 10^-9)/(.0707)^2

= 1800.5 N/C

Now to find the x component,

cos 45 = x/1800.5

x= 1273.18 N/C

Now just multiply by 2 to accommodate both charges,

E=2546.35 N/C in direction of 0 degrees

The electric field has a magnitude of 2546.35 N/C and an angle of 0 degrees.

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Answer:

water can change to a solid even though its a liquid

Explanation:when water freezes it turns into a solid

The ice cube floating in my sody is getting smaller and smaller.

There was a puddle of rain water on the ground by the side door this morning, but there's no puddle there now.

Answer:

(v2² - v1²)/(2x) = (7.5² - 5.0²)/(2*50) = 0.3125 m/s²

The acceleration of the boat is 0.16 m/s².

We have a boat.

We have determine the boat's acceleration.

The rate of change of velocity with time is called Acceleration.

a = dx/dt

According to the question -

Initial velocity (u) = 5m/s

Final velocity (v) = 7.5m/s

Distance (d) = 50 m.

Now -

v²- u² = 2aS

(v + u)(v - u) = 2aS

12.5 x 2.5 = 200 a

a = 0.16 m/s².

Therefore, the acceleration of the boat is 0.16 m/s².

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The speed of the car at the bottom of the hill is obtained as, \(v = \sqrt{2gh}\)

According the principle of conservation of energy, the total potential energy of the car will be converted to maximum kinetic energy when the car is at the bottom of the hill.

\(K.E = P.E\\\\\frac{1}{2} mv^2 = mgh\\\\v^2 = 2gh\\\\v= \sqrt{2gh}\)

where;

Thus, the speed of the car at the bottom of the hill is obtained as, \(v = \sqrt{2gh}\)

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Answer:

July

Explanation:

In july you would expect least hurricane

Answer:

Explanation:

The formula for centripetal acceleration is

\(a_c=\frac{v^2}{r}\) . Filling in:

\(2.5=\frac{v^2}{15}\) and

\(v=\sqrt{2.5(15)}\) so

v = 6.1 m/s

Answer:

2.53m/s

Explanation:

Initial momentum in a system= Final momentum in a system

65kg*3m/s+12kg*0m/s=(65kg+12kg)*v

195kgm/s=77kg*v

v=2.53m/s

The cosmic catastrophic event that occurred, which caused the tilt of the Earth's axis relative to its plane of orbit to increase from 23.5 degrees to 90 degrees, the most obvious effect of this change would be d. the elimination of seasonal variation.

Seasonal variation refers to the occurrence of climatic conditions that can be seen to vary from one season to the next. This seasonal variation is brought about by the tilt of the Earth's axis relative to its plane of orbit, which results in the hemispheres receiving different amounts of sunlight at different times of the year. This results in the appearance of seasons such as winter, spring, summer, and fall. The Earth's axis is tilted at an angle of 23.5 degrees relative to its plane of orbit around the sun. This angle results in the Earth's axis always pointing in the same direction as it orbits the sun, resulting in seasonal variation.

In the absence of this tilt, there would be no seasonal variation, the most noticeable effect of the increased tilt of the Earth's axis from 23.5 degrees to 90 degrees would be the elimination of seasonal variation, as there would no longer be any change in the amount of sunlight that the hemispheres receive. Therefore, option d) the elimination of seasonal variation would be the correct answer.

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Answer:

Mantle convection is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface. The Earth's surface lithosphere rides atop the asthenosphere and the two form the components of the upper mantle.

Explanation:

Answer:

4.0×10⁻¹⁷ N

Explanation: