2. How far does sound travel in 0.75 s in -35°C weather?
(equation in formula sheet linked above)

Answer:

try this

Explanation:

The energy of a falling object when it hits the ground is equaled to the energy it starts with because the potential energy is converted into kinetic energy entirely with the height at 0. This means the energy would be 200 J.

RESULT

2)

Explanation

Step 1

Ohm's law states that the strength of a direct current is directly proportional to the potential difference and inversely proportional to the resistance of the circuit.

so

a)

b)

Step 2

2

let

Power is equal to voltage multiplied by current.

so

also, replacing

also

I hope this helps you

Answer:

1. :uniformly accelerated motion

2. .0m/s

1. ( b ) ==》 uniform motion

_____________________

2. ( a ) ==》 0 m/s

Answer:

B. square root of 72 is irrational.

D. Square root of 23 is irrational

Explanation:

square root of 72 and 23 is not a perfect square, therfore not rational

Answer:

Acceleration = Final velocity - initial velocity / time take

65-35=30 , 30/5=6

Acceleration = 6m s-2

Explanation:

Central venous pressure is blood pressure in the venae cavae, close to the right atrium of the heart.

The blood pressure in the venae cavae, close to the right atrium of the heart, is known as central venous pressure (CVP). The CVP measures both the volume of blood returning to the heart and the heart's capacity to pump blood back into the arteries.

Since there might occasionally be a pressure difference between the venae cavae and the right atrium, CVP is frequently a good approximation of right atrial pressure (RAP), despite the fact that the two terms are not interchangeable. When artery tone is altered, CVP and RAP can be different.

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Answer:

Height: Weight: Your BMI is , indicating your weight is in the category for adults of your height. For your height, a healthy weight range would be from to pounds....

Explanation:

If the majority of the objects observed had a redshift (spectral lines shifted toward the red end of the spectrum), this means these objects are all moving:  away from the milky way. The correct option to this question is A.

Redshift refers to the phenomenon where the spectral lines of an object are shifted towards the red end of the spectrum due to the Doppler effect. This occurs when the object is moving away from the observer, in this case, the Milky Way.

The majority of objects observed with redshift are moving away from the Milky Way, which supports the idea of an expanding universe.

In the context of astronomy and astrophysics, the observation of redshift in the majority of objects indicates that these celestial bodies are moving away from our galaxy, the Milky Way.

This observation provides evidence for the theory of an expanding universe, which is a fundamental concept in our understanding of the cosmos.

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To swap the contents of registers r0 and r1, you can use a third register, such as r2, to facilitate the swap operation.

Here is an instruction sequence to achieve this:

1. Load the contents of r0 into r2:

  MOV r2, r0

2. Move the contents of r1 into r0:

  MOV r0, r1

3. Move the contents of r2 (original value of r0) into r1:

  MOV r1, r2

After executing these instructions, the contents of r0 will be swapped with the contents of r1, and r2 will hold the original value of r0. Now r0 will have the initial value of r1, and r1 will have the initial value of r0.

This instruction sequence effectively exchanges the values between r0 and r1 using a temporary register, r2, as an intermediary storage location.

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The clock run 5×10⁵ s after moving 10,000 C of charge through the clock at a rate of 0.500 mA.

Electric charge is the property of subatomic debris that reasons it to revel in a pressure when placed in an electric powered and magnetic discipline. Electric powered prices are of two kinds: wonderful and terrible, typically carried through charge vendors protons and electrons.

In an atom of remember, an electrical price takes place every time the quantity of protons within the nucleus differs from the wide variety of electrons surrounding that nucleus. If there are extra electrons than protons, the atom has a bad fee. If there are fewer electrons than protons, the atom has a nice rate.

Applying,

Q = It--------------------------------------- Equation 1

Q = quantity of charge in coulombs,

I = electric current in Ampere

t = time in seconds

t = Q/I  ----------------------------------- Equation 2

Given: Q = 10000 C, I = 0.500 mA = 5A

Substitute these values into equation 2

t = 10000/(5)

t = 5×10⁵ s

Hence the clock runs for 5×10⁵ ss

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Answer:When prfessionals take data collections its important becasue it can cause error. Lets say they are sloppy with thier work and end up getting something that is not near what should be happening. This can have a major affect on the truth of what they are doing and an effect on thier end result in general.

Explanation:

Answer:

When prfessionals take data collections its important becasue it can cause error. Lets say they are sloppy with thier work and end up getting something that is not near what should be happening. This can have a major affect on the truth of what they are doing and an effect on thier end result in general.

Explanation:

Explanation:

c) aceleración

The demand for a necessity such as electricity tends to be inelastic. Here's why:Inelastic demand is when changes in price don't affect the quantity demanded as much.

Necessities such as food, water, and electricity often have an inelastic demand, meaning that when the price of the product increases, the quantity demanded does not decrease as much.Explanation:For example, if the cost of electricity increased by 10%, a household might not be able to decrease its use of electricity as much, such as by 10%. The amount of electricity that a household uses might not be affected by price changes because it's a necessity.A vertical demand curve implies that a change in price results in no change in quantity demanded.

Unit elastic refers to a change in price that results in a proportional change in quantity demanded.D elastic refers to the degree of price sensitivity. Demand is said to be elastic when a price change causes a substantial change in demand.

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Answer:

2.10L

Explanation:

Given data

V1= 2.5L

T1= 275K

P1= 2.1atm

P2= 2.7 atm

T2= 298K

V2= ???

Let us apply the gas equation

P1V1/T1= P2V2/T2

substitute into the expression we have

2.1*2.5/275= 2.7*V2/298

5.25/275= 2.7*V2/298

Cross multiply

275*2.7V2= 298*5.25

742.5V2= 1564.5

V2= 1564.5/742.5

V2= 2.10L

Hence the final volume is 2.10L

Unintentional injuries caused by accidents are the number one killer of children and teenagers.

What causes the majority of adolescent deaths?

A little over half of all adolescent fatalities are caused by accidents. Over one-third of all fatal accidents fall under the category of motor vehicle fatalities, which is the top cause of death for teens. Non-Hispanic black male teens have the highest death rate.

The top causes of mortality for children under 5 years old continue to be congenital anomalies, pre-term birth complications, birth asphyxia, and other infectious diseases like pneumonia, diarrhea, and malaria. According to a recent study, homicide is the top cause of death for children in the United States, and the total rate has grown by 4.3% annually on average.

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The spring potential energy (U) stored in the spring when compressed to 8 cm is 3.84 J.

The massless spring of a spring gun has a force constant k = 12 N/cm.

We need to determine the spring potential energy (U) stored in the spring when compressed to 8 cm.

The given variables are force constant k and displacement x of the massless spring.

Recall the formula for spring potential energy Spring potential energy (U) stored in the spring is given by:U = (1/2) k x²where:k is the force constant of the springx is the displacement of the spring from its equilibrium position

Substitute the given values in the formula

The displacement of the spring is 8 cm = 0.08 m

The force constant of the spring is k = 12 N/cm = 1200 N/m

Therefore, the spring potential energy (U) stored in the spring when compressed to 8 cm is:U = (1/2) k x²U = (1/2) × 1200 N/m × (0.08 m)²U = 3.84 J

Therefore, the spring potential energy (U) stored in the spring when compressed to 8 cm is 3.84 J.

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Explanation:

Given mass of the object is 1200kg and it's placed at a height of 45m above the ground. As we know that potential energy is ,

\(\longrightarrow PE = mgh \)

where,

Substituting the respective values ,

\(\longrightarrow P.E. = 1200kg * 10m/s^2* 45m\)

Multiply ,

\(\longrightarrow P.E. = 540000J \)

Hence the potential energy is 540000J .

I hope this helps.

Answer: gravity

normal force

friction

Explanation:

A force is refered to as the interaction which when unopposed, will lead to a change in an objects motion. The velocity of an object will be changed when force is applied.

Since Alisa s riding down a hill and she and the skateboard are considered to be a single object, then the forces that are acting on her include gravity, normal force and friction.

Answer:

if it is a true or false, the answer is true

Explanation:

A higher CpK value indicates better process capability. Therefore, the CpK of this process is 5.22 (rounded to two decimal places).

To calculate the CpK (Process Capability Index), we need to determine the process capability and compare it to the specification limits.

The formula for CpK is given by:

CpK = min((USL - mean) / (3 * standard deviation), (mean - LSL) / (3 * standard deviation))

Where:

USL = Upper Specification Limit

LSL = Lower Specification Limit

In this case, the USL is 55 ohms (50 + 5) and the LSL is 45 ohms (50 - 5). The mean is 49.8 ohms and the standard deviation is 0.09 ohms.

Substituting these values into the formula:

CpK = min((55 - 49.8) / (3 * 0.09), (49.8 - 45) / (3 * 0.09))

CpK = min(5.22, 5.33)

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The decline of the Spanish and Portuguese empires between 1450 and 1750 can be attributed to a combination of economic decline, political instability, military defeats, and religious and cultural factors. These factors weakened their global influence, ultimately leading to their downfall during this time period.

Several factors led to the decline of the Spanish and Portuguese empires between 1450 and 1750, which were once at the height of their power during this time period.

Firstly, economic decline played a major role in their downfall. The Spanish and Portuguese economies were heavily dependent on their colonies for resources, such as gold, silver, and agricultural products.

However, as other European nations started to establish their own colonies, the demand for goods from the Spanish and Portuguese colonies decreased. This led to a decrease in their trade revenue, and in turn, weakened their economies.

Secondly, political instability contributed to their decline. Both empires faced various internal conflicts, such as the War of Spanish Succession (1701-1714) and the Portuguese Restoration War (1640-1668). These wars drained their resources and weakened their central governments, making it difficult for them to maintain control over their vast territories.

Thirdly, military defeats and the rise of other European powers also played a significant role in the decline of the Spanish and Portuguese empires. For example, Spain suffered several military defeats against England, the Dutch Republic, and France, which led to the loss of some of their territories.

Similarly, Portugal lost its colonies in Asia to the Dutch and British, which further weakened their global influence.

Lastly, the religious and cultural factors cannot be ignored. The Spanish and Portuguese empires were strong supporters of Catholicism, which often led to conflicts with Protestant nations.

The aggressive spread of their religion and cultural practices in their colonies also created tensions, leading to resistance and uprisings among the local populations.

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Using the theories of electromagnetic radiations, we got that  4×\(10^{4}\)nm. is the  frequency of a photon of electromagnetic radiation for red light

We know very well that there is a relation between velocity of light, frequency and wavelength of light.

The relation is given by c=vλ where v is the frequency of light and λ is the wavelength of the light.

We are given for wavelength as 750nm or 750×\(10^{-9}\)m

We, know that speed of light is =3×\(10^{8}\)m/sec

So putting the values in formula, we get

=>3×\(10^{8}\)=v×750×  \(10^{-9}\)

=>v=(3/750)×\(10^{17}\)

=>v=0.004×\(10^{17}\)

=>v=4×\(10^{13}\)m or 4×\(10^{4}\)nm.

Hence, the frequency of a photon of electromagnetic radiation for red light(750nm) is 4×\(10^{4}\)nm.

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Answer:

ur correct g the answers are wrong

Explanation:

Answer:

Explanation:

0.00000341 = 3.41 × 10^-6 (Move the decimal point to the right till you get to 4 and count how many moves you made. Put a minus behind the number.)

4.35 × 10^6 = 4350000 (Move the decimal point 6 times to the right.)

6.1 × 10^-4 = 0.00061 (Move the decimal point to the right 4 times.)

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Your first to answers are correct. Maybe you'd have to tell your teacher to look into it.

The magnitude of the acceleration of the car is 0.463 m/s2.

In this question, we are given that: A 0.0501-kg pair of fuzzy dice is attached to the rearview mirror of a car by a short string. The car accelerates at constant rate, and the dice hang at an angle of 2.74o from the vertical because of the car's acceleration. We need to determine the magnitude of the acceleration of the car. Now, let's try to solve this question.

Step 1: Identify the given values m = 0.0501 kgθ = 2.74o

Step 2: Identify the required value a = ?

Step 3: The formula for the magnitude of the acceleration of the car can be given as F = m × aa = F / m where ,F = tension in the string

Step 4: Identify the forces acting on the fuzzy dice We know that there are two forces acting on the fuzzy dice. They are: Weight force acting on the fuzzy dice, Tension force acting on the string attached to the rearview mirror.

Step 5: Find the weight force acting on the fuzzy dice The weight force acting on the fuzzy dice can be given as W = mg Where ,m = 0.0501 kg (mass of the fuzzy dice)g = 9.8 m/s2 (acceleration due to gravity)W = 0.0501 × 9.8W = 0.49198 N

Step 6: Find the tension force acting on the string attached to the rearview mirror .We know that the tension force is acting along the string, T, which is attached to the rearview mirror. Therefore, the tension force is acting horizontally. Now, let's resolve the weight force acting on the fuzzy dice into two components: Horizontal component, F h Vertical component, F v Therefore ,F v = W = 0.49198 N Now ,F h = F × sinθwhere, θ = 2.74oFh = Tension force acting on the string acting horizontally = Tan θ × F v = Tan 2.74 × 0.49198 = 0.0232 N

Step 7: Find the acceleration of the car We know that the tension force acting on the string and the force applied by the car on the fuzzy dice are the same. Therefore   F = T Therefore ,a = F / m = 0.0232 / 0.0501a = 0.463 m/s2Therefore, the magnitude of the acceleration of the car is 0.463 m/s2.

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Direction of |a+b| is south east and that of |a-b| is north east.

Given

a = 3i - 2j

b = -i - 4j

To find,

a+b =?

a-b =?

|a+b| = |(3i - 2j - i - 4j)|

        = |2i - 6j|

        = \(\sqrt{2^{2} + (-6^{2}) }\)

        = \(\sqrt{4+36}\)

        = \(\sqrt{40}\)

        = \(2\sqrt{10}\)

|a-b| = |(3i - 2j) - (-i - 4j)|

       = |3i -2j + i + 4j|

       = |4i + 2j|

       = \(\sqrt{4^{2} + 2^{2} } \\\)

       = \(\sqrt{16+ 4}\)

       = \(\sqrt{20}\)

       = \(2\sqrt{5}\)

Direction of |a+b| is south east (|2i - 6j|, this shows 2 units to the right and 6 units down)

Direction of |a-b| is north east (|4i + 2j|, this shows 4 units right & 2 units up)

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We are given the vector v = -12i + 19j, and we are required to find its magnitude and direction angle.Step-by-step solution:Given vector is, v = -12i + 19jWe can find the magnitude of vector v using the Pythagorean theorem, i.e.,  v = √((-12)² + 19²)

Using a calculator, we get,v ≈ 22.455So, the magnitude of vector v is approximately equal to 22.455.Now, to find the direction angle of vector v, we need to first find its angle with respect to the positive x-axis. This can be done using the formula:θ = tan⁻¹(y/x)θ = tan⁻¹(19/-12)θ ≈ -56.31°

Since this angle is measured in the clockwise direction from the positive x-axis, we need to add 360° to it to get the angle measured in the counterclockwise direction from the positive x-axis.θ = 360° - 56.31°θ ≈ 303.69°Hence, the direction angle of vector v is approximately equal to 303.69° (rounded to one decimal place).Therefore, the magnitude of the vector v is ≈ 22.455, and its direction angle is ≈ 303.69°.

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Answer:

The direction of friction force is toards north.

Explanation:

A tool box is at rest on the back of a track. The truck is accelerating towards north.

As the frame of reference is acceleratinf so it is a non inertial frame  of reference.

Thus, teh toolkit experineces a pseudo force towards the south direction.

According to the question, the toolbox is at rest so the fiction force is balances by teh psheudoforce, and thus teh friction force is acting toards north.

The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases.  As the amplitude of the sound wave increases, the intensity of the sound increases. Sounds with higher intensities are perceived to be louder.