Which best describes the motion of the object between 1 and 4 seconds?

Given:

Height = 0.8 m

Initial velocity = 7.6 m/s

Given that the ball goes straight up, let's solve for the following.

(a) What will be the ball's velocity when it gets back to its original height.

Since the ball has an initial velocity of 7.6 m/s, the ball's velocity when it gets back to its original height will be the opposite of the initial velocity.

Here, the final velocity will be the same as the initial velocity but in the downward direction.

Therefore, the ball's velocity when it gets back to its original height will be -7.6 m/s

(b) How long will it take the volleyball to get to the top of its path.

To find how long it will take the volleyball to get to the top of its path, apply the formula:

Where:

vf is the final velocity at its maximum height = 0 m/s

vi is the initial velocity = 7.6 m/s

a is acceleration due to gravity = -9.8 m/s^2

d is the displacement

Let's solve for the displacement.

We have:

Now, to find the time it will take, apply the formula:

Where t is the time.

We have:

ANSWER:

(a) -7.6 m/s

(b) 0.78 s

The magnitude of the resultant vector of two forces of 19.8 pounds and 36.5 pounds act on a body is 49.2 pounds that is option C.

The resulting value of two or more vectors can be calculated using the resultant vector formula. By calculating the vectors based on their respective orientations to one another, this is achieved. The resultant vector formula has several uses in engineering and science. This is illustrated via the interaction of many force vectors on a body, where the resulting vector is calculated using this formula.

Depending on the orientation of the vectors, there are three different types of resulting vector formulas. These equations apply to vectors moving in the same direction, vectors moving in the opposite direction, and vectors moving at an angle to one another.

We have two forces as 19.8 pounds and 36.5 pounds

by using the resultant formula we have,

R² = f1² + f2² + 2(f1)(f2)cos(θ)

R² = 19.8² + 36.5² + 2(19.8 x 36.5) cos(61.4)

= 1724.29 + 1445.4 x 0.478

= 1724.29 + 691.9

= 2416.2

R = \(\sqrt{2416.2}\)

R = 49.2 pounds.

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Answer:

diaetes

Explanation:

Answer:

A:  In an adiabatic process, no heat enters or leaves the system

The power required to move the automobile to the top of the hill is 130,666.67 watts or 175.41 horsepower.

The power required to move an object can be calculated using the formula: power = work / time.

First, let's calculate the work done in lifting the automobile to the top of the hill. The work done against gravity is given by the formula: work = force × distance.

The force required to lift the automobile is equal to its weight. The weight of an object is given by the formula: weight = mass × acceleration due to gravity.

Substituting the given values, we have: weight = 2,000 kg × 9.8 m/s^2 (acceleration due to gravity) = 19,600 N.

The distance the automobile is lifted is 100 meters.

Therefore, the work done against gravity is: work = 19,600 N × 100 m = 1,960,000 J (joules).

The time taken to reach the top of the hill is given as 15.0 seconds.

Now, we can calculate the power using the formula: power = work / time.

power = 1,960,000 J / 15.0 s = 130,666.67 W (watts).

To convert watts to horsepower, divide the power in watts by 746 (1 horsepower = 746 watts).

power in horsepower = 130,666.67 W / 746 = 175.41 hp (horsepower).

Rounding to two decimal places, the power required to move the automobile to the top of the hill is approximately 130,666.67 watts or 175.41 horsepower.

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The  to problem of calculating the power required to move a 2,000-kilogram automobile to the top of a 100-meter hill in 15.0 seconds is given

Given, Mass of the automobile, m = 2000 knight of the hill, h = 100 time, t = 15.0 the gravitational potential energy of the automobile when at the bottom of the hill is equal to the work done in lifting it up the hill

.W = mgh= (2000 kg) (9.81 m/s²)

(100 m)= 1,962,000 J

Power is defined as the rate at which work is done, or the work per unit time. Therefore,

Power = Work / Time= 1,962,000 J / 15.0 s

= 130,800 WIn horsepower, Power = (130,800 W) / (746 W/hp)

= 175.3 hp

Therefore, the required power to move a 2,000-kilogram automobile to the top of a 100-meter hill in 15.0 seconds is 130,800 W or 175.3 hp.

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Increasing the mass of block a or decreasing the compression distance x would decrease the maximum height ha.

The maximum height ha reached by block a can be calculated using the conservation of energy principle.

At the maximum height, all the potential energy of the system is equal to the initial potential energy stored in the spring.

The initial potential energy stored in the spring can be calculated as:

Uinitial = 1/2 k x^2

At the maximum height, the potential energy of block a can be calculated as:

Ua = maha*g

Therefore, the maximum height ha can be found as:

ha = Ua/(ma*g) = (1/2 k x^2)/(ma*g)

As we can see, increasing the mass of block a or decreasing the compression distance x would result in a decrease in the maximum height ha.

This is because both these variables would cause a decrease in the initial potential energy stored in the spring, which would result in a lower maximum height.

On the other hand, increasing the spring constant k would increase the initial potential energy stored in the spring, resulting in a higher maximum height ha.

Similarly, decreasing the mass of block b or increasing the compression distance x would result in a higher maximum height hb for block b.

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Answer: thermal energy

Explanation: hope this helps

The correct option B) The object continues to roll without slipping, and the actual force of static friction doesn't change.

When an object experiences static friction, its frictional force resists any applied force, causing the object to stay at rest until the static frictional force is removed. The frictional force opposes an object's motion in kinetic friction.

When an object and surface have twice as much friction as is required to prevent slippage, the object rolls onto the surface without slipping.

Thus, the ensuing motion is that the object keeps rolling without slipping, and the static friction's actual force remains constant.

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This is the proportion of ultrasonic energy that travels forward when a beam of light hits a boundary between two mediums. A sound wave with a 50 W/cm2 intensity hits a boundary and therefore is completely reflected.

The degree, volume, the magnitude of a phenomenon, such as fire, emotion, weather, effort, or passion, is known as its intensity. The word "intensity" has been linked to passion, fire, even violence in the past. When describing the intensity of something like a flame or possibly a love affair, it is utilized.

Usually, the intensity of an exercise session is categorized as low, middle, or . The Athletics and Sedentary Lifestyle Guidelines for Australia recommend a moderate degree of activity for optimal health benefits.

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Answer:

a

Explanation:

The Perseid meteors repeat regularly around August 11th or so, despite everything in the solar system moving around, because the debris that creates them follows a consistent orbit.

The orbit of the debris producing the meteor shower is consistent, and it orbits the Sun in the same manner every year. When the Earth crosses through the debris stream, the debris enters the Earth's atmosphere and burns up, producing the Perseid meteor shower.This means that even if the Earth's movement is unpredictable, as it revolves around the Sun, the Perseid meteor shower will occur around the same time every year.

Hence, it's not because of the Earth's movement or other bodies in the solar system that the Perseid meteors repeat regularly around August 11th or so, but because of the consistent orbit of the debris that creates them.

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When you make several trips to unload a few heavy items from a car instead of moving them all at once, the total distance over which you exert yourself increases.

When you make multiple trips to unload heavy items from a car, you are covering the same distance multiple times, which increases the total distance over which you exert yourself.

Carrying heavy items repeatedly can cause strain on the muscles, joints, and bones, especially if not done properly, which can lead to injuries over time. It would be more efficient to move all of the items at once, as this would reduce the total distance covered and the overall amount of effort required.

This is a simple example of the principle of "work smart, not hard".

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The velocity for mass of 60 kg is 99.6 m/s and for mass of 90 kg is 122 m/s.

The displacement that an object or particle experiences concerning respect to time are expressed vectorially as velocity. The meter per second (m/s) is the accepted unit of velocity magnitude (also known as speed). Alternately, the magnitude of velocity can be expressed in centimeters per second (cm/s).

The pace at which a body's distance changes about time is referred to as its velocity. Its SI equivalent is m/s.

Given:-

Mass (m1) = 60kg

Mass (m2) = 90kg

Assumption:

ρ(air) = 1.21 kg/m^3

Pike position so assume A = 0.14 m^2

Pike position so assume C = 0.7

The terminal velocity \(V_T= \sqrt{\frac{2mg}{ρ(air)*C*A} }\)

For 60kg,

\(V_T= \sqrt{\frac{2*60*9.80}{1.12*0.7*0.14} }\)

\(V_T=99.6m/s\)

For 90kg,

\(V_T= \sqrt{\frac{2*90*9.80}{1.12*0.7*0.14} }\)

\(V_T=122m/s\)

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Answer:

Symbiosis

Explanation:

When you have a symbiotic relationship,  it is between two or more organisms of different species.

Answer:

(d) zero

Explanation:

Net acceleration = (a - g)

a is downward so it is positive

F(net) = ma(net)

F = 100 x (9.8 - 9.8)

F = 0

The correct option is (d).

The percentage efficiency of the toy will be 23%. It is the ratio of the kinetic and elastic potential energy,

Elastic potential energy is the potential energy held when an elastic item is stretched or compressed by an external force, such as spring stretching.

It equals the work done to extend the spring, which is proportional to the spring constant k and the distance stretched.

Firstly, the kinetic energy is;

\(\rm KE = \frac{1}{2} mv^2 \\\\ \rm KE = \frac{1}{2} \times (150)(0.25)^2 \\\\ KE = 4.6875\ J\)

The elastic potential energy is;

\(\rm E=0.5\times 4\times 10 = 20\\ E=100 \ J\)

The percentage efficiency of the toy is found as;

\(\% \eta = \frac{4.6875 \times 100}{20} \\\\ \% \eta = 23 \% \\\\\)

Hence, the percentage efficiency of the toy will be 23%

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Answer:

Explanation:

Stay safe, stay healthy and blessed.

Have a good day !

Thank you

Answer:

They both have the same GPH

Explanation:

GPE = mgh

m = mass of Claire

2m = mass of Jared

h = height of Claire

h/2 = height of Jared

GPE-jared = (2m)(g)(h/2) = mgh

GPE-claire = mgh

They both have the same GPH

Answer:

Explanation:

The work done by an object can be found by using the formula

workdone = force × distance

From the question we have

workdone = 25 × 4

We have the final answer as

Hope this helps you

The peak wavelength of radiation from the skin is λmax = 9.4 μm.

As per Wien's displacement law, the peak wavelength of radiation emitted by a blackbody is inversely proportional to its temperature. The formula for Wien's displacement law is λmax = b/T, where λmax is the peak wavelength, T is the temperature in Kelvin, and b is a constant of proportionality called Wien's displacement constant, which is equal to 2.898 x 10^-3 m.K.

To calculate the peak wavelength of radiation from the skin, we need to convert its temperature from Celsius to Kelvin, as T in the formula must be in Kelvin. Therefore, the skin temperature in Kelvin is 308 K (35 + 273).

Using the formula, we can calculate the peak wavelength of radiation as λmax = 9.4 μm. This means that the skin emits radiation predominantly in the infrared region of the electromagnetic spectrum, which is not visible to the human eye.

It's important to note that the skin is not a perfect blackbody, and its emissivity varies with wavelength and surface conditions. Therefore, the actual spectrum of radiation emitted by the skin may deviate from the ideal blackbody spectrum predicted by Wien's displacement law.

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Answer:

In simple terms, fats are animal fats whereas oils are vegetable oils. The other difference is fats tend to be solids at room temperature; on the other hand, oils tend to be liquid at room temperature.

Explanation:

Respuesta: T2 = 131.04K

Explicación: Dado lo siguiente:

Presión, P1 = 1.5 atm = 1.5 × 760 = 1140 mmHg

Presión, P2 = 1.2 atm = 1.2 × 760 = 912 mmHg

Volumen, V1 = 500cm3 Volumen, V2 = 300cm3

Temperatura, T1 = 273K Temperatura, T2 =?

Usando la fórmula de gas combinada:

P1V1 / T1 = P2V2 / T2

Ingresando nuestros valores:

(1140 × 500) / 273 = (912 × 300) / T2

T2 × (1140 × 500) = 912 × 300 × 273

T2 = 74692800/570000 T2 = 131.04K

Answer:

the output rating that should the pump motor have is 83.30 Watt

Explanation:

Given that

The pump lift 20 kg of water per minute having a height of 25.50 m

We need to find out the output rating that should the pump motor have

As we know that

power = energy ÷  time

=  m g h ÷ t  

=   20.0 × 9.8 × 25.50 ÷ 60  

=  83.30 Watts

Hence, the output rating that should the pump motor have is 83.30 Watt

Answer:

I believe it is C but I could be wrong

Explanation:

From the picture it shows the eco/voice coming from room to room. I hope this helped have a wonderful day or night!

(a) The acceleration of the salt shaker is 1.18 m/s².

(b) The distance traveled by the baseball player before coming to rest is 204.1 m.

The acceleration of the salt shaker at the given coefficient of kinetic friction is determined as follows;

a = μg

a = 0.12 x 9.8

a = 1.18 m/s²

Acceleration of the baseball player is calculated as follows;

a = μg

a = 0.4 x 9.8

a = 3.92 m/s²

The distance traveled by the baseball player before coming to rest is calculated as follows;

v² = u² - 2as

0 = 40² - 2(3.92)s

0 = 1600 - 7.84s

7.84s = 1600

s = 204.1 m

The complete question is below:

A baseball player slides into third base with an initial speed of 40 m/s. If the coefficient of kinetic friction between the player and the ground is 0.40, how far does the player slide before coming to rest?

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Answer:

I think it is D or A

Explanation:

I have not done this in a long time, so sorry if wrong.

The battery can supply approximately 5.83 × 10^22 electrons to the phone during an hour-long conversation.

To calculate the number of electrons supplied by a battery to a cell phone during an hour-long conversation, we can use the equation relating current, time, and charge.

The equation is as follows:

Charge (in coulombs) = Current (in amperes) × Time (in seconds)

Given that the current supplied by the battery is 2600 mA (which is equivalent to 2.6 A) and the duration of the conversation is 1 hour (which is equivalent to 3600 seconds), let's calculate the charge:

Charge = 2.6 A × 3600 s

Charge = 9360 C

Now, we know that one coulomb (C) corresponds to the charge of approximately 6.242 × 10^18 electrons. Using this conversion factor, we can calculate the number of electrons supplied by the battery:

Number of electrons = Charge × (6.242 × 10^18 electrons/C)

Number of electrons = 9360 C × (6.242 × 10^18 electrons/C)

Number of electrons ≈ 5.83 × 10^22 electrons

Therefore, the battery can supply approximately 5.83 × 10^22 electrons to the phone during an hour-long conversation.

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The speed or orbital velocity of the satellite is 5.47 x 10³ m/s.

Mass of Earth = 5.98 x 10²⁴ kg

The period of the satellite is 1.20 x 10⁴ seconds.

By using Kepler's third law of planetary motion,

T² = ( 4π² / GM )a³

The satellite orbit is described by its semimajor axis, a, around the Earth (as we know it is a circular orbit, the semimajor axis is equal to the radius of the orbit).

Now we have,

T =  1.20 x 10⁴ seconds

The gravitational constant, G = 6.674 × 10⁻¹¹ m³/kgs²

The orbital velocity is given by,

V = √GM/a

Now we have,

T² = ( 4π² / GM )a³

a³ = T² × ( GM / 4π² )

a³ = [  1.20 x 10⁴ × 1.20 x 10⁴ × 6.674 × 10⁻¹¹ × 5.98 x 10²⁴ ] / 4π²

a³ = 57.4711488 × 10²¹/ 4 × π²

a³ = 1.455 × 10²¹

a = 1.33 × 10⁷

Then the orbital velocity will be:

V = √GM/a

V = √ [ 6.674 × 10⁻¹¹ × 5.98 x 10²⁴ / 1.33 × 10⁷ ]

V = √ [39.91052 x 10¹³ / 1.33 × 10⁷]

V = √ 30.007 x 10⁶

V = 5.47 x 10³ m/s

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Answer: No, they cannot

Explanation:

Because every individual has different emotions, different beliefs.