while standing on a long board resting on a scaffold, a 68 kg painter paints the side of a house, as shown in the figure below. if the mass of the board is 25 kg, how close to the end can the painter stand without tipping the board over?

Your logical hypothesis is now subjected to methodical testing to support or refute the assumption. There are a number of factors that can affect an empirical hypothesis, causing modifications and leading to certain results.

The approach uses sample data. Data collection: We take a representative sample of the population. Making a Decision: We contrast the sample results with the population-based hypothesis.

In most cases, we contrast the estimated value of the population parameter with the value of a statistic calculated from the sample data.

A statement that can be supported by observations or tests concerning the natural world is called a hypothesis. Hypotheses must be falsifiable—that is, they must be formulated in a fashion that allows them to be disproven—and be evaluated scientifically in order to be considered to be true.

Therefore, while a theory is a group of closely related phenomena or observations, A testable hypothesis is a logical proposition.

Learn more about hypothesis here:

https://brainly.com/question/29519577

#SPJ4

Due to the fixed ends, a wave that is propagating up the string in one direction will reflect at the end and return inverted. The standing wave on the string is created by these two similar waves moving in the opposite direction.

When two waves with the same frequency and amplitude move in opposition to one another and interfere with one another, a standing wave result.

The string's basic frequency is the lowest resonance frequency (n=1). As integer multiples of the fundamental frequency, all higher frequencies are referred to as harmonics. The strings on all stringed musical instruments are fastened at both ends.

The n frequency is related to the fundamental frequency by the eq.

[tex]f_{n}=nf_{1}[/tex]

or

[tex]f_{1}=\frac{f_{n}}{n} \: \: \: \: \: \:\: \: \: \: \: \: \: \: (1)[/tex]

besides, we know that,

[tex]f_{n+1}=(n+1)f_{1}[/tex]

or

[tex]f_{1}=\frac{f_{n+1}}{n+1} \: \: \: \: \:\: \: \: \: \: \: (2)[/tex]

matching eq. (1) to (2),

[tex]\frac{f_{n}}{n}=\frac{f_{n+1}}{n+1}[/tex]

[tex]f_{n}(n+1)=f_{n+1}n[/tex]

isolating n from this eq.,

[tex]n = \frac{f_n}{f_n+1- f_n} = \frac{15}{20- 15}[/tex]

Once got the n value, just insert in eq. (1) so you can know the fundamental frequency,

[tex]f_1= \frac{f_n}{n} = \frac{15Hz}{3} = 5Hz[/tex]

Therefore, 5Hz is the fundamental frequency.

Learn more about standing waves here:

https://brainly.com/question/14176146

#SPJ4

The correct option is B, the distance between mass reduces to half then gravitation force increases by four times.

According to newton's law of gravitation,

Force between two masses F = GMm / r^2

If distance is halved r = r/2

F' = GMm / (r / 2)^2 = 4GMm / r^2 = 4F

Gravitation force is a fundamental force of nature that exists between any two objects with mass. This force is responsible for keeping objects like planets, stars, and galaxies in motion, and is essential for the formation and stability of the universe. The force of gravity is proportional to the mass of the objects and the distance between them, according to the famous equation proposed by Sir Isaac Newton: F = G(m1m2)/d^2.

The force of gravity is an attractive force, meaning it pulls objects towards each other. This force is why objects fall to the ground when dropped and why planets orbit around their suns. The gravitational force also affects the flow of time and the curvature of space, as explained by Einstein's theory of general relativity.

To learn more about Gravitation force visit here:

brainly.com/question/24783651

#SPJ4

Complete Question: -

A planet is attracted to the sun with a certain force. if the distance from the sun to the planet is reduced by one half, what would happen to the force?

A. decreased by two times

B. increased by four times

C. increased by two times

D. decreased by four times

As per the question the radius of the turn is approximately 33.25 meters.

An object travelling in a circular path will experience centripetal acceleration. It is always pointed in the direction of the circle's center, hence the formula:

a = v^2 / r

where a denotes the centripetal acceleration, v the object's speed, and r the circle's radius. According to this formula, the centripetal acceleration rises with the object's speed and falls with the circle's radius.

According to question:

We can start by using the centripetal acceleration formula:

a = v^2/r

where a is the centripetal acceleration, v is the velocity, and r is the radius of the turn.

In this case, we know that the centripetal acceleration is 1.5 times the free-fall acceleration, which is approximately 9.8 m/s^2. Therefore:

a = 1.5 * 9.8 m/s^2 = 14.7 m/s^2

We also know that the velocity of the falcon is 22 m/s. Plugging these values into the formula above, we get:

14.7 m/s^2 = (22 m/s)^2 / r

Solving for r, we get:

r = (22 m/s)^2 / 14.7 m/s^2 ≈ 33.25 m

Therefore, the radius of the turn is approximately 33.25 meters.

To know more about centripetal acceleration visit:

https://brainly.com/question/14465119

#SPJ4

(a) The pressure between the student and the floor is 817 Pa.

(b) The pressure between the student and each nail 14,848 Pa.

Pressure is calculated by dividing force by area. The force exerted on the floor by the student is equal to their weight, which is the force of gravity acting on their mass.

The weight of the student can be calculated as follows:

W = mg

W = 50 kg (9.8 m/s²)

W = 490 N

So the pressure between the student and the floor can be calculated as follows:

P = F / A

P = 490 N / 0.6 m²

P = 817 Pa

To find the pressure between the student and each nail, we need to divide the student's weight by the total area of the nails' heads.

A (nails) = NA

A (nails) = 3300 x 1 x 10⁻⁷ m²

A (nails) = 0.033 m²

So the pressure between the student and each nail can be calculated as follows:

P = F / A

P = 490 N / 0.033 m²

P = 14,848 Pa

Learn more about pressure here: https://brainly.com/question/28012687

#SPJ1

The car covers approximately 599.8 feet before coming to a stop, when the brakes are fully applied with a constant deceleration of [tex]46 ft/s^2[/tex].

The problem involves finding the distance covered by a car when the brakes are fully applied and it comes to a stop. To solve this problem, we can use the equations of motion for constant acceleration.

We can solve this problem using the equations of motion for constant acceleration.

First, we need to convert the initial velocity from miles per hour to feet per second:

[tex]50 mi/h = 73.33 ft/s[/tex] (approx)

Next, we can use the following equation to find the distance covered by the car before coming to a stop:

[tex]v^2 = u^2 + 2as[/tex]

where v is the final velocity (which is zero when the car comes to a stop), u is the initial velocity [tex](73.33 ft/s)[/tex], a is the deceleration [tex](-46 ft/s^2)[/tex], and s is the distance covered.

Substituting the values, we get:

[tex]0 = (73.33 ft/s)^2 + 2(-46 ft/s^2)s[/tex]

Simplifying this equation, we get:

[tex]s = (73.33 ft/s)^2 / (2 * 46 ft/s^2) = 599.8 ft[/tex]

Therefore, the car covers approximately 599.8 feet before coming to a stop, when the brakes are fully applied with a constant deceleration of [tex]46 ft/s^2[/tex].

Learn more about deceleration here:

https://brainly.com/question/25839029

#SPJ4

A super-happy fun ball is thrown from a height of six feet, and it returns to the point where it was dropped. It only bounces once before rebounding less than a distance of one foot.

To solve this problem, we can use a geometric series to represent the distance traveled by the ball after each bounce.

Let's denote the height of the ball after the nth bounce as [tex]h_n[/tex]. Then we have:

[tex]h_1 = 6[/tex] (the initial height of the ball)

[tex]h_2 = 6 + 6 = 12[/tex] (the height after the first bounce)

[tex]h_3 = 6 + 6 + 6 = 18[/tex] (the height after the second bounce)

[tex]h_4 = 6 + 6 + 6 + 6 = 24[/tex] (the height after the third bounce)

and so on.

The height after the [tex]n^t^h[/tex] bounce:-

[tex]h_n = 6 * 2^(^n^-^1^)[/tex]

Now, we want to find the number of bounces that the ball will make before its rebound height is less than 1 foot. In other words, we want to find the smallest value of n such that[tex]h_n/2 < 1.[/tex] This is equivalent to:

= [tex]6 * 2^(^n^-^1^) / 2 < 1[/tex]

= [tex]3 * 2^(^n^-^1^) < 1[/tex]

= [tex]2^(^n^-^1^) < 1/3[/tex]

= [tex]n-1 < log2(1/3)[/tex]

= [tex]n < log2(1/3) + 1[/tex]

= [tex]log2(1/3) = -1.585, so n < -1.585 + 1 = -0.585[/tex].

Since n must be a positive integer, the smallest value of n that satisfies the condition is n = 1.

Therefore, the ball will bounce once before its rebound height is less than 1 foot.

To know more about distance please refer: https://brainly.com/question/9722272

#SPJ4

answers are: 1) 239 F, 2) 7.222C, 3) 299.15K , 4) 98.6 F, 5) -205.1C

Formulas for converting temperature values between different units are referred to as temperature conversions. There are numerous ways to convert temperatures. The most popular units of measurement among these are Kelvin, Celsius, and Fahrenheit. The Kelvin scale states that water has a freezing point of 273.15K and a boiling point of 373.15K. Water has a freezing point of 32°F and a boiling point of 212°F on the Fahrenheit scale. The freezing point of water is 0°C, and the boiling point is 100°C, according to the Celsius system.

(115°C × 9/5) + 32 = 239°F

(45°F − 32) × 5/9 = 7.222°C

26°C + 273.15 = 299.15K

(37°C × 9/5) + 32 = 98.6°F

68K − 273.15 = -205.1°C

To know more about temperature visit:

https://brainly.com/question/11464844

#SPJ1

When a projectile is launched at an angle of 30 degrees above the horizontal, the tallest barrier it may clear is 14 meters. The correct option is (b) 33.3m/s.

we can use the kinematic equations of motion for projectile motion. The key is to recognize that the projectile will reach its maximum height when it is at the top of its trajectory, at which point its vertical velocity is zero.

First, we can use the vertical motion equation to find the time it takes for the projectile to reach its maximum height:

vy = v.sin θ - gt

0 = v sin θ - gt

t = v sin θ / g

Next, we can use the horizontal motion equation to find the horizontal distance traveled by the projectile in this time:

x = v.cos θ.t

Now, we want to find the launch speed v that will result in the maximum height of 14 m. To do this, we can substitute the expressions we just derived for t and x into the vertical motion equation for the maximum height:

h = (v sin θ)² / (2g)

Solving v:-

v = √(2gh) / sin θ

Putting values:-

v = √(2 × 9.81 m/s² × 14 m) / sin 30.0°

v ≈ 33.3 m/s

Therefore, the projectile's launch speed is approx. 33.3 m/s, which is answer choice (b).

Note that answer choices (a), (c), and (d) are all close to the correct answer, but not quite correct. This illustrates the importance of being careful with units and significant figures when performing calculations.

To know more about projectile please refer: https://brainly.com/question/13388411

#SPJ4

a) Energy of the photon, in joules and in million electron volts is 8.1 x 10⁻¹⁴ Joule and 0.505 MV b) wavelength of the photon, in angstrom units is  0.0245 A.

The distance between two corresponding spots on the adjacent waves is the wavelength. Small, uncharged particles that move at the speed of light are called photons.

It is possible to make and destroy photons while maintaining momentum and energy. As a source emits EM waves, photons are produced, and when they come into contact with matter, they may be absorbed and have their energy transferred.

Mass = 9.1 x 10⁻³¹ kg

C = 3x10⁸ m/sec

a) Energy = mc²

= 9.1x10⁻³¹ x (3x10⁸)²

= 8.1 x 10⁻¹⁴ Joule

1joule = 6.24 x 10¹²

Energy E = 8.1 x 10⁻¹⁴ x 6.24x10¹²

E = 0.505 MV

b) E = h/λ

= 8.1x10⁻¹⁴

= 6.625 x 10⁻³⁴ x 3 x 10⁸/λ

λ = 2.45x10⁻¹² m

= 2.45x10⁻² A

= 0.0245 A

m = E/c²

= 1.3194x10⁸/(3x10⁸)²

= 0.1466 x 10⁻⁸ kg

m = 1.47 x 10⁻⁶ gram.

Learn more about Energy, wavelength of proton:

https://brainly.com/question/30143614

#SPJ4

Complete question:

If all the mass of an electron were converted to electromagnetic energy, what would be the (a) energy of the photon, in joules and in million electron volts? (b) wavelength of the photon, in angstrom units? 3.28. The thermal energy content of 1 U.S. gal (3.79 L) gasoline is 36.65 kW hours. To what weight of nuclear fuel, grams, does this amount of energy correspond?

The center of mass of the two particles is located at (-0.76, 0).

To find the center of mass of the two particles, we need to calculate the coordinates of the point where the total mass of the system is concentrated.

                                 xcm = (m1x1 + m2x2) / (m1 + m2)

                                 ycm = (m1y1 + m2y2) / (m1 + m2)

where x1 and y1 are the coordinates of mass m1,

x2 and y2 are the coordinates of mass m2, and

m1 and m2 are the masses of the particles.

Substituting the given values, we get:

xcm = (6.0 kg)(-3.0 m) + (2.1 kg)(4.5 m) / (6.0 kg + 2.1 kg) ≈ -0.76 m

ycm = (6.0 kg)(0 m) + (2.1 kg)(0 m) / (6.0 kg + 2.1 kg) ≈ 0 m

Therefore, the center of mass of the two particles is approximately located at (-0.76, 0). This means that the total mass of the system can be thought of as being concentrated at this point, and any external forces acting on the system can be treated as if they are acting on this point.

To know more about center of mass visit:

https://brainly.com/question/29554695

#SPJ1

When dealing with an electrical emergency involving a downed power line, it is important to follow certain safety precautions to avoid injury or further damage.

First, stay at least 10 meters (around 33 feet) away from the downed power line and any objects that it may be touching, as they could potentially be electrified.

Next, call 911 to report the downed power line and warn others in the area to stay away.

Do not attempt to move the power line or any objects it may be touching, as this could result in serious injury or death. Wait for emergency responders to arrive and follow their instructions. Remember, safety should always be the top priority in any electrical emergency.

Learn more about downed power line https://brainly.com/question/5503443

#SPJ11

Hepatitis C would be the best choice for Helena's report on an infectious disease.

HIV, hepatitis A, B, and C, measles, salmonella, measles, and blood-borne disorders are a few examples of communicable diseases. The most frequent methods of transmission are feces-oral transmission, food transmission, sexual contact, insect bites, contact with contaminated formice, droplets, or skin contact.

Direct contact between people cannot spread dengue. However, an infected and unwell dengue fever patient can transmit the illness to more mosquitoes.. It is known that during the period when the virus circulates and reproduces in the circulatory system, humans can spread the infection from one nation or region to another.

To know more about infectious disease visit:-

https://brainly.com/question/19580009

#SPJ1

Answer: D. The student can place the bar magnet near the known pole of a second magnet and observe the interaction between the poles.

Explanation: Magnets having the property that they attract the different poles and repel the same poles.

The better Investigation should be going to be conducted by the student is that by taking the known pole magnet and make the interaction with the unlabeled magnet.

step 1: choose the known magnet pole first (say S-pole).

step 2: make interaction of this pole with the any of two poles of unlabeled magnet.

step 3: if both magnets are attracting to each other, the pole will be North pole (N-pole), and if repelling to each other, the pole will be South pole(S-pole)

Now if we got the first Pole, the second will be obvious.

(since , magnets have two poles. N-pole and S-pole)

Know more about Magnetic Poles:

brainly.com/question/14997726

The longest wavelength of the light that is capable to remove an electron from the potassium metal is 68 nm

The binding energy of the electron in potassium = 1.76 x 10⁶ J/mol

The longest wavelength required to remove the electron from the potassium can be found using the formula,

            E = hc / λ

where E is the binding energy of the potassium

           h is Planck's constant

           c is the speed of light

           λ is the wavelength of the light.

The energy required for one electron is

      1.76 × 10⁶  / 6.02× 10²³ = 2.92 × 10⁻¹⁸

Let us substitute the known values in the above equation, we get

            2.92 × 10⁻¹⁸ = 6.63 x 10⁻³⁴ x 3 x 10⁸ / λ

                             λ = 6.63 x 10⁻³⁴ x 3 x 10⁸ / 2.92 × 10⁻¹⁸

                                =  6.82 x 10⁻⁸

                                = 68.2 nm

Therefore, the wavelength of the light is 68.2 nm

Learn more about the wavelength in

https://brainly.com/question/29398067

#SPJ4

Electric and magnetic fields are proportional, and transverse electromagnetic waves do exist in nature. and have oscillations that are parallel to one another and have the same phase. A medium is not necessary for electromagnetic waves to travel.

Mechanical waves cannot pass through a vacuum, which is empty space, however electromagnetic waves can. They require a means of transportation, like water or air. The wave propagates in a direction that is opposite to both the magnetic and electric fields.

Two waves that are oscillating perpendicular to one another make up electromagnetic waves. One is represented by the oscillating magnetic field, while the other is represented by the oscillating electric field.

Therefore, Mechanical waves include things like pond ripples while electromagnetic waves, like light and radio signals, can move through space's vacuum.

Learn more about electromagnetic waves here:

https://brainly.com/question/16515517

#SPJ4

Well, you didn't tell us what the unit of the 53.14 is.  But whatever it is, the force of friction is the same 53.14 of them.

The only way the box can move with constant velocity is if the forces acting on it all add up to zero. So the force of friction to the left, holding it back, must be exactly equal to the force pushng it forward to the right.

Notice that none of this depends on the mass of the box, or WHAT the constant velocity IS.  None of that information matters, or makes any difference. It's only included in the question to confuse and distract us.  

The minimum average speed must the car have in the second half of the event in order to qualify is 266.6km/hr.

Given the average speed of a race car (v) = 250km/hr

The total length of track (s) = 1600m = 1.6km

The initial average speed of car up to first half (v1) = 230km/h

Overall race duration divided by total average speed equals the amount of time that car can spend on the entire race.

total time(t) = 1.6/250 = 0.0064hrs

Let the time taken for first half = t1

such that t1 = 0.8/230 = 0.0034hr

The time left for second half = t2 = t - t1

t2 =  0.0064hrs - 0.0034hr = 0.003hr

The average speed for the second half of track = v2

then v2 = 0.8/t2 = 0.8/0.003 = 266.6km/hr

To learn more about speed click here https://brainly.com/question/28224010

#SPJ4

The most affecting physical weathering is by the roots of large trees. They are strong enough to erode rocks. Hence, option B is correct.

Rocks, minerals, and soils disintegrate through a process known as physical weathering, sometimes known as mechanical weathering. Abrasion is the main physical weathering process.

Temperature, pressure, frost, root movement, and burrowing animals can all cause physical deterioration. For instance, physical weathering will expose more surface area through the use of cracks, speeding up the pace of deterioration.

Across the world, gorges, ravines, and valleys are formed by processes of water, ice, and wind that are loaded with silt. Here, strong roots embedded into the soil are enough to cause physical weathering.

Find more on physical weathering:

https://brainly.com/question/14426457

#SPJ1

The relationship between the length of the pendulum and the period of oscillation is determined by the fact that the time period T of a simple pendulum is directly proportional to the square root of length l of the pendulum i.e., T∝√l or T2∝l.

Oscillation may be characterized as the methodology of repeating variations of any quantity or measure about its equilibrium value in time. The back-and-forth swinging motion of the bob of a pendulum is known as the oscillation of a pendulum.

The length of the pendulum = 0.5 m

The time duration for 10 oscillations = 81s.

The time duration for 1 oscillation = 81/10 = 8.1 sec.

But when this experiment was conducted at a location that is not near Earth’s surface. The gravitational field may have an effect on it. Due to this, the time taken by one oscillation is increased from 8.1 or more.

Therefore, the relationship between the length of the pendulum and the period of oscillation is determined by the fact that the time period T of a simple pendulum is directly proportional to the square root of length l of the pendulum.

To learn more about Pendulum oscillation, refer to the link:

https://brainly.com/question/26449711

#SPJ1

Answer:

To calculate the linear expansion of a brass rod due to a temperature change of 100K, we can use the formula:

ΔL = α * L * ΔT

where:

α = linear expansivity of brass (1.8 x 10^-5K^-1)

L = original length of the rod (2m)

ΔT = change in temperature (100K)

Plugging in the values:

ΔL = 1.8 x 10^-5K^-1 * 2m * 100K = 0.036m

So the linear expansion of the brass rod due to a temperature change of 100K is 0.036 meters.

the maximum weight that the cables can support is = 12.75 × 102 N.

The maximum force exerted by each of the two cables is 7.50 × 102 N. The maximum weight that the cables can support is the sum of the forces exerted by the two cables, which is 7.50 × 102 N + 7.50 × 102 N = 15.00 × 102 N.

To calculate the maximum weight, we can use the following equation:

Weight = Force × Sin (Angle)

Therefore, the maximum weight that the cables can support is 15.00 × 102 N × Sin (40°) = 12.75 × 102 N.

What is weight?

Weight is a measure of the force of gravity acting on an object. It is measured in units of mass such as kilograms, pounds, or ounces. Weight is a property of matter, meaning that it is always present in any object with mass, regardless of whether it is at rest or in motion.

Therefore, the maximum weight that the cables can support is = 12.75 × 102 N.

To learn more about weight

Here: https:brainly.com/question/18927138

#SPJ4

A bit of the sunlit side of the moon shows with the light side being on the left called the illuminated crescent.

What is illuminated?

Illumination is the process of making an object or surface bright. It is most commonly used to refer to the artificial lighting of an area or object. In the scientific field, illumination is also used to refer to the reflection of light off a surface, such as a microscope slide or a cell culture plate. Illumination can be used to observe cells, measure chemical reactions and monitor light-sensitive materials. Illumination can also be used to detect light-emitting substances and identify particular components of a sample. In astronomy, illumination is used to study the properties of planets and stars. Illumination is also used to identify objects in space and observe the effects of light on distant galaxies.

Therefore, A bit of the sunlit side of the moon shows with the light side being on the left called the illuminated crescent.

To learn more about illuminated

Here: https://brainly.com/question/16683852

#SPJ4

Weight of the man = m * g = 80 kg * 9.81 m/s^2 = 784.8 N

Potential energy of the man = mgh = 80 kg * 9.81 m/s^2 * 4.0 m = 3139.2 J

Using the formula for work done by a force, the average force exerted by the water on the man can be calculated as: F = (mgh) / d = 3139.2 J / 2.0 s = 1569.6 N.

Therefore, the average force exerted by the water on the man is 1569.6 N.

The mass of the man who steps off the diving platform is given as 80 kg in this scenario. Mass is a fundamental property of an object that describes the amount of matter present in it. In this case, the man is considered as a single object with a mass of 80 kg. This mass value is important in calculating the force exerted by the water on the man as he comes to rest. The mass of an object is an essential parameter in many physical calculations such as the calculation of kinetic energy, potential energy, and force.

To know more about Mass visit:

https://brainly.com/question/15959704

#SPJ4

The age of the rock is 3.512 billion years.

What are 3 types of rocks?

1. Igneous rocks

2. Sedimentary rocks

3. Metamorphic rocks

For the first rock, the number of potassium-40 atoms is equal to the number of argon-40 atoms. That can only happen when when one half life cycle has elapsed. Therefore the age of this rock is indeed 1.25×109 years. Now let us calculate the age of the second rock sample. Let us say that the number of potassium-40 at the beginning was N​​​​​​0 and the number of potassium-40 after a particular time t us N. There after 1.25 billion years, N= N​​​​​​0 /2.  Now we know the decay constant. This means that every second,5.54×10-10 atoms of potassium-40 decay into argon-40. We can use this decay constant to calculate the time required for the number of argon-40 to be 7 times as much as potassium-40. We want the time required to get the condition N​​​​​ = N​​​​​​0/7. So the correct answer is 3.512 billion years.

Therefore,  the age of the rock is 3.512 billion years.

To learn more about rocks the link

https://brainly.com/question/19930528

#SPJ1

The age of the rock is approximately 42 million years, calculated using the equation (7/8) = (1 - [tex]e^{-kt}[/tex] ) with k = ln(2)/1.25 billion years and solving for t.

What is the dating of rock?

The dating of rocks refers to the process of determining the age of rocks or geological events using various techniques, such as radiometric dating, relative dating, and stratigraphy. Radiometric dating involves measuring the ratio of parent and daughter isotopes in a rock, while relative dating involves determining the order of events in geological history. Stratigraphy involves analyzing the layers of sedimentary rocks to determine the relative age of the rocks and the events they represent. These techniques are used by geologists to study the history of the Earth and the processes that have shaped it over time.

The ratio of argon-40 to potassium-40 in a rock can be used to determine the age of the rock based on the half-life of potassium-40. The equation for the decay of potassium-40 to argon-40 is:

K-40 --> Ar-40 + e-

where e- represents an electron and a neutrino.

The half-life of potassium-40 is 1.25 billion years, which means that half of the original amount of potassium-40 will decay to argon-40 in 1.25 billion years. After another 1.25 billion years, half of the remaining potassium-40 will decay, and so on.

If a rock contains seven times as much argon-40 as potassium-40, that means the ratio of argon-40 to potassium-40 is 7:1. We can set up the following equation to solve for the age of the rock:

(7/8) = (1 - [tex]e^{-kt}[/tex])

where k is the decay constant for potassium-40, t is the age of the rock, and e is the mathematical constant approximately equal to 2.71828.

The decay constant for potassium-40 can be calculated using the following formula:

k = ln(2)/t1/2

where ln represents the natural logarithm and t1/2 is the half-life of potassium-40.

Plugging in the values, we get:

k = ln(2)/1.25 billion years = 0.00055 [tex]years^{-1}[/tex]

Substituting k into the first equation and solving for t, we get:

t = -ln(7/8)/0.00055 [tex]years^{-1}[/tex] = 42 million years

Therefore, the age of the rock is approximately 42 million years.

To learn more about the dating of rock click here

https://brainly.com/question/19448171

#SPJ1

Answer:

A) The speed of a satellite in a geosynchronous orbit about Earth is approximately 3 kilometers per second (km/s).

B) The speed of the Earth as it orbits the Sun is approximately 29.8 kilometers per second (km/s). The speed of the satellite in a geosynchronous orbit about Earth is much slower compared to the speed of the Earth as it orbits the Sun.

Explanation:

The world doesn't grow in size to reach a new temperature. Nonetheless, until a new equilibrium is reached, the temperature will rise. Thus, option A is correct.

When competing forces or influences are in a condition of equilibrium, a stable system results from the balance that results from the conflicting influences.

A terrestrial planet's heat budget gets out of balance when it emits less energy, which causes the planet's temperature to drop. The planet must raise its temperature until it radiates energy at the same pace as it receives it in order to reach a new equilibrium.

This process, known as thermal equilibrium, occurs when the amount of energy entering and leaving the system balances out, maintaining a constant temperature. Hence, as a terrestrial planet emits less energy, its temperature rises until a new equilibrium is reached.

Therefore, when less energy is radiated from a terrestrial planet, its Temperature increases until a new equilibrium is achieved.

Learn more about equilibrium here:

https://brainly.com/question/16989820

#SPJ1

One light-minute is approximately 18 million kilometers.

One light-minute is the distance that light travels in one minute, at the speed of light, which is approximately 300,000 km/s. we can simply multiply the speed of light by the number of seconds in one minute:

1 light-minute = 60 seconds x 300,000 km/s

1 light-minute = 18,000,000 km

Therefore, one light-minute is approximately 18 million kilometers.

Light is an electromagnetic wave that travels through space at a constant speed of approximately 300,000 km/s. This means that in one second, light can travel a distance of 300,000 kilometers.

300,000 km/s x 60 seconds = 18,000,000 km

To know more about  One light-minute, here

https://brainly.com/question/17265421

#SPJ4

Reading on the scale will be 1130 N when the elevator accelerates upward with an acceleration of 5.2 m/s2.

Change in velocity over the change in time is acceleration and is represented by : a = Δv/Δt.

Formula to calculate the apparent weight (W') is given by:

W' = W + ma

W is true weight of the person, m is mass of the person, and a is acceleration of the elevator.

Given, W = 740 N, a = 5.2 m/s2.

W = mg

g is acceleration due to gravity, which is 9.8 m/s2.

740 N = m * 9.8 m/s2

m = 740 N / 9.8 m/s2 = 75.5 kg

W' = W + ma = 740 N + (75.5 kg)(5.2 m/s2) = 740 N + 390 N = 1130 N

So, the reading on the scale will be 1130 N when the elevator accelerates upward with an acceleration of 5.2 m/s2.

To know more about acceleration, refer

https://brainly.com/question/460763

#SPJ1