with the current, you can row 9 miles in 2 hours. against the current, your return trip takes 6 hours. find your average rowing velocity in still water and the average velocity of the current

Answer:

The molecules in hot air are moving faster than the molecules in cold air.

There is proof that our ancestors survived the 800,000 years ago asteroid collision into Southeast Asia, which was caused by a kilometer-long space rock. The Sun was obscured for many years by the dust the asteroid produced, which had an effect on human evolution. Still, the human race was spared.

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Answer:

...wow...

interesting

A photon of blue light has a higher frequency and a lower wavelength than a photon of red light.

The wavelength of light is the distance between corresponding points in two adjacent light cycles, and the frequency of light is the number of cycles of light that pass a given point in one second.

Wavelength is typically represented by λ, the lowercase Greek letter lambda, while frequency is represented by ν, the lowercase Greek letter nu

Red light has a wavelength of ~700 nm, and a frequency of ~4.3*\(10^{14}\) Hz. Visible light makes up just a small part of the full electromagnetic spectrum.

Wavelength of blue light: 450nm and  frequency of blue light 6.66 * \(10^{14}\) Hz

Blue light has higher frequency, shorter wavelength and more energy.

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Answer:

\(3.9056\times 10^6\)

Explanation:

The number given in standard form is

\(3905600\)

The given scientific notation is

\(3.9056\times 10^7=39056000\)

The decimal will move seven digits to the right.

There is an extra zero when we expand the given scientific form.

\(3905600\neq 39056000\)

The scientific form of the given number is \(3.9056\times 10^6\).

So, the given scientific notation of the number is wrong.

The angle of the balls with respect to the vertical would decrease

When an atom has an equal amount of protons and electrons, it also has an equal number of positive and negative electric charges, which are represented by the electrons (the protons). Because of this, an atom is said to be neutral because its overall electric charge is zero.

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As you gradually raised the mass of the balls, the angle of the balls with regard to the horizontal would decrease non-neutral charge.

When an element has an equal amount of protons and electrons, it also has an equivalent number of positive and negative electrostatic force (the protons). Since the atom has a zero total electric charge, it is considered to as neutral.

If we are to establish the total charge of an atom, we must also know the value of the minuscule particles that make up the atom. Neutrons were positively charged particles that are found in the nucleus. Furthermore, neutrons are found in.

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The coefficient of kinetic friction μ = 0.22.

The frictional force on the crate is given by F = μN where

μ = the coefficient of kinetic friction and

N = normal force.

The normal force equals the weight of Block W = 50 N.

Since the kinetic friction F = 11 N,

and the normal force which is the weight of the Block equals

N = W = 50 N,

the coefficient of kinetic friction μ is given by μ = F/N

= 11 N/50 N

= 0.22

So, the coefficient of kinetic friction μ = 0.22

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The value of the capacitance required to tune an FM radio circuit to 91.3 MHz with a coil inductance of 0.0036 mH is 2.65E-12 F.

To calculate the capacitance, we can use the formula for the resonant frequency of an LC circuit: f = \(1 / (2\pi \sqrt(LC)\)). Rearranging the formula, we have L = \((1 / (4\pi ^{2} f^{2} C))\). Plugging in the given values, we can solve for C.

First, convert the inductance to Henrys:\(L = 0.0036 mH = 0.0036 * 10^(^-^3^)\) H = 3.6 × 10^(-6) H. The frequency is given as 91.3 MHz, so f = 91.3 × 10^6 Hz. Plugging these values into the formula, we get\(3.6 * 10^(^-^6^) = (1 / (4\pi ^{2} * (91.3 * 10^6)^{2} * C))\). Solving for C, we find \(C = 2.65 * 10^(^-^1^2^)\) F, which corresponds to option b.

Therefore, the value of the capacitance required to tune the FM radio tuning circuit to 91.3 MHz is approximately \(2.65 * 10^(^-^1^2^)\) F.

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The direction and magnitude of the minimum magnetic field needed to lift this wire vertically upward is clock wise direction and 0.245T.

The magnetic field is the area that is affected by magnetism and is located around a magnet. The magnetic field is a valuable tool for explaining the distribution of the magnetic force within and around a magnetic object in nature.

The mass per unit length of the wire = 0.460 g/cm = 0.046 kg/m

Current in the wire, A = 2.12 A (due south)

To find,

The minimal magnetic field's magnitude as well as its direction.

F = ILB = mg

B = mg/IL

B = 0.046 × 9.8 /2

B = 0.225T

B = 0.245T.

The right hand rule specifies the magnetic field's direction, which is clockwise around the wire.

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Answer:

D

Explanation:

a twist is an event that a reader probably wouldn't have been able to predict

Answer:

d) the object gets bluer

blue wavelengths are shorter than red wavelengths (in the visible spectrum)

blue light will carry more energy than an equivalent amount of red light

The appearance of an object as it gets hotter is that the object gets bluer. Hence, option (d) is correct.

Wavelength is the separation between the equivalent points of two successive waves. When two points or particles are referred to be "corresponding points," it means that they are both in the same phase and have completed exactly the same portions of their vibration. Typically, the wavelength of transverse waves—those whose points advance at right angles to one another—is assessed from crest to crest or from groove to trough; for longitudinal waves—those whose points advance in the same direction—the wavelength is measured from compression to compaction or from rarefaction to rarefaction.

A wave train's speed (v) in a medium is equal to its frequency (f), hence the formula for wavelength is v/f. Wavelength is commonly represented by the Greek character lambda λ.

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Answer:

ok

Explanation:

Have a nice day!

Answer:

1

Explanation:

How many digits are in front of the decimal in scientific notation?

Answer:

Explanation:

Thousands of avalanches occur in Canada each year. They happen in all regions of Canada, but are more frequent in the mountains of British Columbia, Yukon and Alberta. Avalanches can be triggered by wind, rain, warming temperatures, snow and earthquakes. They can also be triggered by skiers, snowmobiles, hikers, vibrations from machinery or construction.            Avalanche facts:

An avalanche occurs when a layer of snow collapses and slides downhill.

Avalanches are caused by four factors: a steep slope, snow cover, a weak layer in the snow cover and a trigger.

Roads and railway tracks may be rerouted to reduce risks.

Safe avalanches may be triggered in dangerous snow packs.

Avalanches can travel up to 90 km/h.

After one hour, only one in three victims buried in an avalanche is found alive. The most common causes of death are suffocation, wounds and hypothermia.

Its acceleration is parallel to the x-axis

Using Newton Second Law of motion

Where M is mass of the object, \(\overrightarrow{F}\) = Net force,\(\overrightarrow{a}\) = acceleration.

Thus net force and acceleration has always the same direction.

Now net force on the box is in the positive x-direction then acceleration on the box is in the positive x-direction.

Acceleration is given by

\(\overrightarrow{a}\) = \(\frac{d\overrightarrow{v}}{dt}\)

Where \(\overrightarrow{v}\) = velocity of the box and t = time

thus acceleration is parallel to change in velocity but not velocity. Thus it is not necessary that velocity of the box is parallel to the x-axis. Because if initially box is moving in arbitary direction then only its x-component of velocity changes only but another component of velocity remain same.

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The period of the mass-spring system is 0.39 seconds.

It is given that a spring with a spring constant of 245 N/m is attached to a 1. 5 kg mass and then set in motion. To calculate the period of the mass-spring system, you can use the formula:

T = 2π√(m/k)

where T is the period, m is the mass, and k is the spring constant.

Given the mass (m) as 1.5 kg and the spring constant (k) as 245 N/m, plug in these values:

T = 2π√(1.5 kg / 245 N/m)

T ≈ 0.39 s

So, the period of the mass-spring system is approximately 0.39 seconds when rounded to two decimal places.

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Answer:

It is True that Humans are not the only animals that pollute the air.

True

Every animal exhales CO2, that's why they pollute the air too, except that it is much less than that of humans.

Answer:

A. 4 m³

B. 1 m³

Explanation:

A. Determination of the new volume.

Initial Volume (V₁) = 2 m³

Initial temperature (T₁) = 27 °C + 273 = 300 K

Final temperature (T₂) = 327 °C + 273 = 600 K

Final volume (V₂) =?

V₁ / T₁ = V₂ / T₂

2 / 300 = V₂ / 600

Cross multiply

300 × V₂ = 2 × 600

300 × V₂ = 1200

Divide both side by 300

V₂ = 1200 / 300

V₂ = 4 m³

B. Determination of the new volume.

Initial Volume (V₁) = 2 m³

Initial temperature (T₁) = 27 °C + 273 = 300 K

Final temperature (T₂) = –123 °C + 273 = 150 K

Final volume (V₂) =?

V₁ / T₁ = V₂ / T₂

2 / 300 = V₂ / 150

Cross multiply

300 × V₂ = 2 × 150

300 × V₂ = 300

Divide both side by 300

V₂ = 300 / 300

V₂ = 1 m³

To burn a hole in a piece of paper with sunlight using your father's 1.80 D reading glasses, you must hold the glasses about 6 cm away from the paper.

This is because the glasses will act as a magnifying lens, and the focal length of the lens is determined by the diopter number (1.80 in this case). The focal length of a 1.80 D lens is approximately 6 cm.

The focal length of a lens is the distance between the lens and the image sensor when the subject is in focus, usually stated in millimeters (e.g., 28 mm, 50 mm). The focal length determines the angle of view of the lens, and thus how much of the scene will be captured when the image is taken.

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The composition of two reflections across non-parallel lines results in a translation, with the same center results in a single rotation, with the same center but in opposite directions results in a single rotation, with different centers results in a single rotation, the composition of a rotation and a reflection results in a single reflection and the composition of a rotation and a reflection results in a single reflection.

To determine the single rigid motion represented by the given composition, we need to analyze the properties and transformations involved.

A. (reflection in line n) o (reflection in line m), when lines n and m are not parallel:

The composition of two reflections across non-parallel lines results in a translation.

B. (rotation, center P, x⁰ cw) o (rotation, center P, y⁰ cw):

The composition of two rotations with the same center results in a single rotation.

C. (rotation, center Q, a⁰ cw) o (rotation, center Q, b⁰ ccw):

The composition of two rotations with the same center but in opposite directions results in a single rotation.

D. (rotation, center R, 50⁰ cw) o (rotation, center S, 60⁰ cw), where R and S are different:

The composition of two rotations with different centers results in a single rotation.

E. (rotation, center T, 40⁰ cw) o (reflection in line p), where line p goes through point T:

The composition of a rotation and a reflection results in a single reflection.

F. (rotation, center T, 40⁰ cw) o (reflection in line q), where line q misses point T:

The composition of a rotation and a reflection results in a single reflection.

Based on the given options, the correct answer would depend on the specific properties and transformations described by the problem statement. Without additional information or a diagram, it is not possible to determine the exact answer.

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Answer:

speed

Explanation:

Answer:

PCP

Explanation:

Answer:

at max height you potential energy is highest

Explanation

At your maximum height, your potential energy is highest.  

And at your exact peak, your kinetic energy is zero, which is the lowest it can ever be.

The acceleration of the baseball is approximately 41.379 m/s².

When a baseball player hits a baseball, the force exerted on the ball causes it to accelerate. To find the acceleration of the baseball, we can use Newton's second law of motion, which states that force is equal to mass multiplied by acceleration (F = ma).

In this case, the force exerted by the baseball player is given as 6 N, and the mass of the baseball is 0.145 kg. We can rearrange the formula to solve for acceleration:

a = F / m

Substituting the given values:

a = 6 N / 0.145 kg

Now, let's calculate the acceleration:

a ≈ 41.379 m/s²

Therefore, the acceleration of the baseball is approximately 41.379 m/s².

In the given answer choices, the correct option is B. 41.4 m/s².

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Answer:

plants because of photosynthesis humans because of food and the energy causing cells in it and batteries or solar panels because of the sun.

Explanation: