Refer to the attached image.

A marching band is practicing. The band director sees the drum major hit a drum. How far away is the director if he hears the drumbeat in 0.40 seconds

The director is 132 meters away from the marching band when the **sound **travels to him at 330 m/s.

The speed of** sound **is 330 m/s.

Time taken by sound to travel = 0.40 seconds

Speed = Distance/Time

The temperature of the air that the **sound** travels through affects the speed of the **sound**. Assuming an air temperature of 59 degrees Fahrenheit (15 degrees Celsius), the speed of sound at sea level on Earth is 761.2 mph (1,225 km/h).

The speed of **sound** is slowed down because gas molecules move more slowly at lower temperatures; **sound** travels more quickly through warmer air. As a result, higher in the atmosphere, where it is colder, the speed needed to break the **sound** barrier drops.

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Why is the molten metallic outer core and the magnetic field important to life on earth?.

Earth's magnetic field and molten metallic outer core creates **barrier to stop Sun's radiation** to strip away our atmosphere.

As we know that inside the earth there are several layers of the earth. The outer one is the **Earth's crust** which is all the ground we have , then we have the **mantle **that consist upper and lower crust. And then after we have **outer and inner crust**.

The outer core is made of molten material that consist of mainly iron and other ferrous metals. The core is important for many reasons-

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Location C is 0.02 m from a small sphere which has a charge of 3 nanocoulombs uniformly distributed on its surface. Location D is 0.06 m from the sphere. What is the change in potential along a path from C to D?

sorry for the late reply back I have been working on this project for a year now so it will not care if we can get the best of him and also has a full one of the most common misconceptions is that Africa is one large country and its followers are known as Sikhs and is the last survivor from the whole family and the fearful of all that is a metaphor of joy organised by the way I have

The **change in potential** along a path from C to D due to a small charged sphere is **900 V.**

**Given:**

Charge, Q = 3 nC = 3 × 10⁻⁹ C

Distance between the sphere and point C, r₁ = 0.02 m

Distance between the sphere and point D, r₂ = 0.06 m

**Calculation:**

We know that the** electric potential** is given as:

**V = k Q/r - (1)**

where, V is the electric potential

k is Coulomb's force constant

Qis the charge on the sphere

r is the separation distance

The electric potential at point C due to **charged sphere** can be given as:

V₁ = k Q/r₁

= (9×10⁹ Nm²/C²) [(3 × 10⁻⁹ C)/(0.02 m)]

= 1350 V

The electric potential at point D due to charged sphere can be given as:

V₂ = k Q/r₂

= (9×10⁹ Nm²/C²) [(3 × 10⁻⁹ C)/(0.06 m)]

= 450 V

Now, the change in potential along the path from C to D can be calculated as:

ΔV = V₂ - V₁

= 450 V - 1350 V

= -900 V

The negative sign indicates that the work is done against the electric field in moving the charge from C to D.

Therefore, the change in potential along a path from C to D is 900 V against the direction of the electric field.

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The figure in Figure 1 shows two single-slit diffraction patterns. The distance between the slit and the viewing screen is the same in both cases. Which of the following could be true

**Answer:**

"The wavelengths are the same for both. The width of slit 1 is larger than the width of slit 2."

**Explanation:**

The full question has not been provided, so I just copied this into the web and found this answer and explanation on quizlet:

"The wavelengths are the same for both. The width of slit 1 is larger than the width of slit 2.

D sin θ = m λ

if the wavelengths are the same, then if the angle is smaller, the slit width must be larger. The top photo shows a pattern that is more closely spaced. That means the angle is smaller. The slit width must be larger."

This answer/explanation should be correct, as we are looking at bright fringes and the formula being used corresponds to the parameters of the question.

Hope this helps!

What is the strength of the intermolecular forces between liquid and gas

Sorry I’m not sure maybe search it?

If we have a sample of silicon (si) atoms that has 14 protons, 14 electrons, and 18 neutrons

Its **silicon-32** because if you want to find an isotope, you have to add the number of **protons** (14) and number of **neutrons** (18) to get 32 as your total.

There are 23 known **isotopes** of silicon (14Si), with mass numbers ranging from 22 to 44. **Stable isotopes** include 28Si (92.23 percent), 29Si (4.67 percent), and 30Si (3.1 percent). The longest-lived **radioisotope** is Si-32, which is created by **argon cosmic ray spallation**.

**silicon-32** has a **half-life** of about 150 years (with a decay energy of 0.21 MeV) and decays by **beta emission** to 32P (which has a half-life of 14.28 days) and then to 32S. Si-32 has the second longest half-life after Si-32, at 157.3 minutes. All others have half-lives of less than 7 seconds.

**Bismuth**, the 83rd element, was previously thought to have the **heaviest stable isotope**, bismuth-209, but in 2003, researchers in Orsay, France, measured the half-life of 209 Bismuth to be 1.91019 years. Only isotopes of **technetium **and** promethium**, as well as all elements with an atomic number greater than 82, are known to decompose via **radioactive decay**. Because no undiscovered elements are expected to be stable, **lead** is regarded as the **heaviest stable element**.

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7. A battery is used to light a 24 W electric lamp. The battery provides a charge of 120 C in

60 s.

TH

24W

What is the potential difference across the lamp?

**Answer:**

power p =24 watt

charge q=120 C

time t = 60s

let V be the potential difference

we know that

work done =qV = pt

qV = Pxt

120V = 24 * 60

V = (24 * 60) / 120

V = 12 volts

A 40.0 N crate is pulled up a 5.0 m inclined plane. The angle of inclination of the plane to horizontal is 37o. If there is a constant force of friction of 10.0 N between the crate and the surface, what is the net gain in potential energy by the crate? Group of answer choices 120 J -120 J 210 J -210 J

The net gain in **potential energy** by the crate is **120 J.**

Potential energy is the energy that an object has stored in it as a result of its position or condition. Potential energy exists in a stretched spring, a book held above your head, and a bicycle on top of a hill. The joule, which is represented by the letter "J," is the standard unit for calculating potential energy.

Calculation:We use the idea of **potential energy**, which is given by the equation,

**PE = mgh**

where,

m = mass of the crate

g = gravitational acceleration

h = height

Given,

mg = 40 N

L = 5 m

angle of inclination, ∅ = 37°

**h = L sin∅**

h = 5 (sin 37°)

h = 5 (3/5)

h = 3 m

Put the values in the above formula,

**PE = mgh**

PE = 40 (3)

**PE = 120 J**

Therefore, the net gain in potential energy by the crate is **120 J.**

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Your older brother approaches a stop sign at a velocity of 14 m/s [E] as the light turns amber, He applies the brakes to get the maximum stopping force while avoiding skidding. The car has a mass of 1500 kg, and the coefficient of friction between the tires and the road is 1.07. Ignoring your brother's reaction time, calculate:

a) The maximum deceleration of the car

b) The stopping distance

The **maximum deceleration** of the car is **10.5 m/**[tex]s^{2}[/tex] approximately. While the **stopping distance is 9.3 m**

Stopping force is the force required to stop the object in motion. Stopping force is tantamount to **frictional force**.

Given that a brother approaches a stop sign at a velocity of 14 m/s [E] as the light turns amber, He applies the brakes to get the maximum stopping force while avoiding skidding. The car has a mass of 1500 kg, and the coefficient of friction between the tires and the road is 1.07. Ignoring your brother's reaction time.

The given **parameters** are;

The **normal reaction** N = mg

N = 1500 x 9.8

N = 14700 N

The stopping force = μN = ma

1.07 x 14700 = 1500a

15729 = 1500a

a = 15729/1500

**a = 10.486 m/**[tex]s^{2}[/tex]

From **3rd equation of motion**

[tex]V^{2}[/tex] = [tex]U^{2}[/tex] + 2aS

where U = 0

[tex]14^{2}[/tex] = 2 x 10.486 x S

196 = 20.972S

S = 196/20.972

**S = 9.3 m**

Therefore, the **maximum deceleration** of the car is 10.5 m/[tex]s^{2}[/tex] approximately. While the **stopping distance is 9.3 m**

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A thin copper rod that is 1.0 m long and has a mass of 0.050 kg is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod? A thin copper rod that is 1.0 m long and has a mass of 0.050 kg is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod? 7.6 A 2.5 A 9.8 A 4.9 A 1.2 A

The minimum **current** in the rod needed is 4.9 A for the **magnetic force** to cancel the weight of the rod.

**What is a magnetic field?**

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.

A moving** charge** in a magnetic field experiences a force perpendicular to its velocity and the magnetic field.

**Force** on a current carrying rod due to the magnetic field is given as:

F = i*L*B

Where,

i is current in the rod.

L is the length of rod = 1 m

B is magnetic field = 0.10 T

Here,

The Magnetic force is balanced by the weight of the rod

**i*L*B = m*g**

i* ( 1 )* ( 0.10 ) = 0.05 * 9.8

**i = 4.9 A**

Hence, option d is correct.

The minimum **current** in the rod needed is 4.9 A for the **magnetic force** to cancel the weight of the rod.

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Energy in should always be equal to energy out. select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer.

a. true

b. false

Energy in should always be equal to energy out. This is a **False **statement.

- Energy In: Energy put into the body in form of **calories **from food like fats, carbohydrates and proteins.

- Energy Out: Energy burn for basic functions of the body like beating of the heart during **physical** movements.

When we consume more energy but does not consume it upto its potential, the body keeps storing the excess amount of energy as body fat. Maintaining a balance between Energy In and Energy Out is important to live a healthy lifestyle since the disbalance creates problems to the body.

It is easier to accurately measure change in energy than to measure the amount of energy present.

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A 5.0-kg object is suspended by a string from the ceiling of an elevator that is accelerating downward at a rate of 2.6 m/s 2. What is the tension in the string

The **tension in the string** is **36 N**.

To find the answer, we need to know about **pseudo acceleration**.

**Tension of the string= mass × effective acceleration**

= 5 × 7.2 = **36 N**

Thus, we can conclude that the **tension** in the string is **36 N.**

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Maryam is driving her car when she glances at the temperature displayed on her dashboard. It says that the temperature is currently 78 degrees outside. This temperature is called a ___.

**Answer: **Maryam is driving her car when she glances at the temperature displayed on her dashboard. It says that the temperature is currently 78 degrees outside. This temperature is called a **Sensation.**

**Explanation:** To find the answer, we need to know more about the **Sensation, perception and psychophysics**.

Thus, we can conclude that, the process of **sensation **happens here.

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The amount of straight pipe needed to bend a given radius. Also, the actual length of the conduit that will be bent.

Development length: The actual length of the **bent conduit**. Gain: Since a **conduit **bends radially rather than at an angle, the total length will not match the length required for all bends. Gain is the amount of space that is saved by a [tex]90^{0}[/tex] curve.

**Conduit **benders from Klein Tools are built to function and last longer than even the highest professional standards. To ensure a favourable experience and significantly enhance the final result of your project, it is advised that you become familiar with bending concepts, procedures, and the bender's capabilities. The benders are labelled with various alignment symbols to enable the operator make the bends required to complete any job. This aids bending while executing a ground or air bend. Arrow, teardrop, star point, and angle markings are the symbols on the Klein Tools benders. On certain bender head sides, you can see these markings.

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A swimming pool is 4.0 m in depth; a swimmer at this depth feels discomfort in the ear. Calculate the net force on a 0.50-cm-diameter eardrum, assuming the inner surface of the eardrum remains at 1 atm pressure

The **net force **on a 0.50-cm-diameter **eardrum **is mathematically given as

**F= 0.76969 N**

What is the net force on a 0.50-cm-diameter eardrum?

Generally, the equation for **Pressure **is mathematically given as

**P = ρgh **

Therefore

P= 1000*9.8*4

P= 39200 Pa

Where

A= pi*(0.005/2)^2

Generally, the equation for **Net force **is mathematically given as

F = PA

F= 39200 *( pi*(0.005/2)^2)

**F= 0.76969 N**

In conclusion, The** net force** is

**F= 0.76969 N**

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Differences between sublimation and condensation

The difference between **sublimation** and **condensation** is that

Sublimation is used to in a separation technique to separate **sublime substance** from a **mixture** while condensation is the

is the process where water vapor becomes **liquid**

This **technique** is used in **chemistry** to separate two or more **constituents** from a **mixture**

In conclusion, sublimation **differs** from condensation because sublimation is used to in a separation technique to separate sublime substance from a mixture while condensation is the

is the process where water vapor becomes liquid

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Based on all we know about the terrestrial worlds, what single factor appears to play the most important role in a terrestrial planet's geological destiny?

Based on all we know about the terrestrial worlds, the single factor appears to play the most important role in a terrestrial planet's geological destiny is size size of **terrestrial **planet .

According to the question

**Terrestrial **Planets:

They belongs to a class of planets that are like the earth

Geological destiny :

Geology is biological destiny: Whatever minerals land or are deposited in a place determine what or who can make a living there millions of years later

Based on all we know about the **terrestrial **worlds, what single factor appears to play the most important role in a **terrestrial **planet's geological destiny

i.e

The size of **terrestrial **planet is one of the factors to play the most important role in a **terrestrial **planet's geological destiny

which determines how long the planet can retain internal heat, which drives geological activity because Smaller worlds cool off faster and harden earlier .

Hence, Based on all we know about the **terrestrial **worlds, the single factor appears to play the most important role in a **terrestrial **planet's geological destiny is size size of **terrestrial **planet .

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use the tools to measure the velocity of the cart after the string was cut. This velocity will be a constant on a smooth surface (after the spring is no longer pulling). What value did you get for the velocity

The **value** gotten for the **velocity** after using the use the **tools** to measure the **velocity** of the cart after the **string** was cut is **positive**

**Velocity** can simply be defined as the rate of change of **displacement** with **time**

Velocity is **measured** in **meters per second** (m/s)

So therefore, thee **value** gotten for the **velocity** after using the use the tools to measure the velocity of the **cart** after the **string** was cut is positive

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A block with a mass of 2kg is pushed 20cm and a constant speed up an incline that makes a 40 degree angle with the floor. how much work is done by gravity on the block ? let d be the displacement of the block.

work done will be **2.5872 J**

**Given :**

mass of block = 2kg

distance travelled by block = 20cm

angle of inclination = 40°

**To Find :**

Work done by gravity

**Solution :**

Gravity is defined as the **force** that attracts a body towards the earth or towards any other physical body **having mass.**

work done by gravity is **mgh**

If **θ is the angle** made when the body falls, the work done by gravity is given by,

**W = m g h cosθ**

W = 2 x 9.8 x 0.2 x cos40°

= 2.5872 J

**So work done will be 2.5872 J**

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A machine has a mechanical advantage of 0.6. what force should be applied to the machine to make it apply 600 n to an object? 100 n 360 n 1000 n 3600 n

**Answer:**

frictional force, should be applied to the machine

**Answer: C) 1000N is needed to be applied.**

**Explanation: Have a Good day!!**

What happens if :

. The test charge is not tiny.

The magnitude of **the test charge** must be small enough so that it does not disturb the issuance of the charges whose electric field we wish to measure otherwise the metric field will be different from the actual field.

As the quantity of authority on** the test charge** (q) is increased, the force exerted on it is improved by the same factor. Thus, the ratio of force per charge (F / q) stays the same.

Adjusting the amount of charge on** the test charge** will not change the electric field force.

The charge that is used to measure the electric field strength is directed to as a **test charge **since it is used to test the field strength. The test charge has a portion of charge denoted by the symbol q.

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Technical skills: knowledge base of sport rearrange our coaching skills from best (at the top) to worst (at the bottom) by dragging each skill to where you think it belongs. this should help you identify your current strengths and limitations as a teacher/coach. after organizing each group of skills, describe steps you think you can take to enhance your strengths and being to address your limitations as a coach.

The steps which enhance **strengths** and address **limitations** as a **coach** include:

This is referred to a **professional** who gives special **training** about a particular **subject** or topic.

It is best to identify **weakness** and work towards **improvement** through determination and **consistency**.

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Place the charge q= 2.10-5c at the origin o of the oxy-axis system. consider two points a(6;0) and b(3;4) on the axes with unit of measurement in cm. choose the potential origin at infinity. calculate the work done by the electric field when moving the charge q=-1uc from a to b

The **work done** by the **electric field** when moving the charge from **a to b** is **0.0378 J.**

r = √[(a₂ - a₁)² + (b₂ - b₁)²]

r = √[(3 - 6)² + (4 - 0)²]

r = 5 m

Work done in moving the chargeW = Fr

W = kq₁q₂/r

W = (9 x 10⁹ x 2.1 x 10⁻⁵ x 1 x 10⁻⁶)/(5)

W = 0.0378 J

Thus, the **work done** by the **electric field** when moving the charge from **a to b** is **0.0378 J.**

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What is the voltage drop across the 10.0 ohm resistor?

The voltage across all the resistors is the same i.e 120V

Each element of the **parallel circuit** has the same voltage applied to it. The total current flowing from the source is equal to the sum of the currents across each path. The electric potential difference (V) across each resistor in a **parallel circuit **is the same. Ohm's law states that I = V / R applies to the current in a resistor. The current will be lowest where the resistance is highest since the V is the same for each resistor. The currents passing through each resistor in a** parallel combination **have the same voltage across them because of their different resistance values and the laws of Ohms i., If two or more components are connected in parallel, they will be having same difference of potential (voltage) across their ends **Parallel circuits **are then used as current dividers.

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Air that is not saturated will cool or heat at a rate of __________________ as it rises or descends, respectively

Air that is not **saturated **will cool or heat at a rate of 10 degrees C/1000 meters as it rises or descends, respectively

The rate of the change in temperature which is observed while moving upward in the earth's atmosphere with elevation. It can be positive, negative and zero when the temperature decreases, increases or is constant with the** elevation **respectively.

For the atmosphere, the drop in temperature of rising air that is **unsaturated air **is about 10 degrees C/1000 meters (5.5 °F per 1000 feet) altitude.

That means if a there occur a rise of 1000 m , then the** temperature **of that thing will decrease to 10 degrees. Every 10°C of temperature from the given temperature will decrease at every rise of 1000 m .Air that is not saturated will cool or heat at a rate of 10 degrees C/1000 meters as it rises or descends, respectively

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At 30° north latitude, at the northern edge of tropical (hadley) cell convection in the northern hemisphere, ________.

a. cool

b. dry

c. air sinks

d. becoming drier as it heats up

At 30° **north latitude**, at the northern edge of tropical (Hadley) cell convection in the northern hemisphere d. becoming drier as it heats up

**Hadley cells**: A cell in the tropics is called Hadley cell. Ferrel cells: In the middle latitudes the circulation is that of sinking cold air that comes from the poles and the rising warm air that blows from the subtropical high. At the surface these winds are called westerlies and the cell is known as the Ferrel cell.

As air is warmed at the equator it becomes less dense and rises, while at the poles the cold air is denser and sinks.

Because of the rotation of the Earth and the Coriolis Effect, rather than a single atmospheric convection cell in each hemisphere, there are three major cells per hemisphere. Warm air rising at the **equator **cools as it moves through the upper atmosphere, and it descends at around 30° latitude.

The convection cells created by rising air at the equator and sinking air at 30° are referred to as Hadley Cells, of which there is one in each **hemisphere**. The cold air that descends at the poles moves over the Earth’s surface towards the equator, and by about 60° latitude it begins to rise, creating a Polar Cell between 60° and 90°.

correct option is d. becoming drier as it heats up

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The technique called adaptive optics uses dynamic mirror motion to enhance the performance of the new generation of spaced-based telescopes. True False

The mentioned statement is **true**.

What is **adaptive optics(AO)**?

How can **adaptive optics(AO)** enhance a telescope's capabilities?

Therefore, it is concluded that the mentioned statement is **true**.

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A stone is thrown horizontally from the top of a tower at the same instant a ball is droppedvertically. Which object is traveling faster when it hits the level ground below?

The **ball **is travelling **faster **when the two objects hits the level ground below.

The** time of motion** of the objects depends on height and initial velocity of projection of the objects.

The **stone **has **no initial vertical velocity** while the **ball **has **initial vertical velocity.**

Thus, the **ball **is travelling **faster **when the two objects hits the level ground below.

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A thin stream of water bends toward a negatively charged rod. When a positively charged rod is placed near the stream, it will bend in the same direction, not the opposite direction. Why

**Water bends** in the same direction irrespective of the **charge** of the rod placed near it is because water is dipole- that hydrogen is positively charged and oxygen is negatively charged and thus either of the particle is attracted by the charged rod.

**The reason behind it:**

As a neutral substance, **water** has an equal number of positive and negative charges. The negatively charged electrons migrate away from the negatively charged rod and the positively charged protons move toward the rod when the **negatively charged rod** is placed closer to the water. Water then adheres to the rod. Protons migrate away from the **positively charged rod**, just as they do when it is moved closer to the water, while electrons flow in its direction. As a result, the water and rod form a relationship.

The partial +ve charge on H is drawn to the -ve charged rod when it is installed, which causes the water stream to bend in the direction of the charged rod.

The partial -ve charge on O is drawn to the +ve rod when it is installed, causing the water stream to bend in the direction of the rod.

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g Suppose the intensity of some electromagnetic wave doubles. What happens to the amplitude of the wave's electric field?

The amplitude of the wave's** electric field** is [tex]\sqrt{2}[/tex] times if the** intensity** of some **electromagnetic wave** doubles.

Electromagnetic waves also called EM waves, are waves that are created as a result of vibrations between an** electric field** and **magnetic field.**

**The formula of Intensity of electromagnetic wave:**

where c is speed of light

E is amplitude of electric field

here Intensity of EM waves doubles so,

**I' = 2*I**

we can say that,

I ∝ E^2

E = sqrt ( I )

E' = sqrt ( 2*I )

hence

**E' = **[tex]\sqrt{2}[/tex]** * E**

so, the amplitude of the wave's** electric field** is [tex]\sqrt{2}[/tex] times if the** intensity** of some **electromagnetic wave** doubles

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April wrote two equations to represent this system of equations. She wrote: y = 5x +I and y = 14x - 10. Do you agree or disagree with April?
Write an event about dramatic irony
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In eukaryotic cells, RNA is transcribed from DNA in the _____ribosomesnuclear membranecytosolnucleus
Factor Method Lcm 20,25,30
How are the atomic number and the number of protons related to each other?
On January 1, Year 1, Chertco acquired a patent for $500,000 and, using the straight-line method, began amortizing it properly over its estimated useful life of 10 years. The asset has no residual value. At December 31, Year 4, a significant change in the business climate caused Chertco to assess the recoverability of the carrying amount of the patent. Chertco estimated that the undiscounted future net cash inflows from the patent would be $325,000 and that its fair value was $275,000. Accordingly, for the year ended December 31, Year 4, Chertco should recognize an impairment loss of :________.a. $175,000 b. $50,000 c. $25,000 d. $0
A bag contains 5 red marbles, 6 blue marble, 3 green marbles, 4 black marbles, 2 yellow marbles. A marble will be drawn from a bag and replaced 200 times. What is a resonanle predition for each times a yellow or green marble will be drawn