1)What is the pressure at point D in kPa ?
2)Temperature at point D
3)What is the net work done on the gas as it is taken through four cycles?
4)What is the internal energy of the gas when it is at point A?
5)What is the total change in internal energy of this gas during four complete cycles?

Based on Newton's first law of motion, the motion of the object will change.

Newton's first law of motion states that an object at rest or uniform motion in a straight line will continue in that path unless acted upon by an external force.

This law is also called the law of inertia because it depends on the mass of the object.

When the applied force act in the opposite direction to the motion of the  object, it may cause the object to stop or reduce the motion of the object.

Also, if the applied force act in the same direction as the object, it will increase the speed of the object.

Thus, based on Newton's first law of motion, the motion of the object will change.

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Answer:

The value is \( v =1.58 *10^{8} \ m/s\)

Explanation:

From the question we are told that

The length of the spacecraft streaks is \(L_i = 85 \ m\)

The proper length of the spacecraft streaks \(L_p = 100 \ m\)

Generally from the equation of relativity of length contraction

\(L_i = L_p * \sqrt{1 - \frac{v^2}{c^2} }\)

Here c is the speed of light with value \(c = 3.0 *10^{8} \ m/s^2\)

v is the velocity of the spacecraft

So

\(\frac{v^2}{c^2} = 1 - \frac{L_i^2}{L_p^2 }\)

=> \(\frac{v^2}{c^2} = \frac{L_p^2 - L_i^2}{L_p^2}\)

=> \(\frac{v^2}{c^2} = \frac{100^2 - 85^2}{100^2}\)

=> \(\frac{v^2}{c^2} = 0.2775\)

=>  \( v =  \sqrt{0.2775c^2}\)

=>  \( v = 0.5268c\)

=>  \( v = 0.5268 *  3.0*10^{8}\)

=>  \( v =1.58 *10^{8} \  m/s\)

The horizontal force required to displace the chandelier 0.16 m is equal to the restoring force divided by the displacement is 1500N

A. To displace the position of the chandelier 0.16 m to one side, a horizontal force is necessary to balance the restoring force due to the tension in the wire. This restoring force can be calculated as the weight of the chandelier times the acceleration due to gravity:

Frest = W * g = 25 kg * 9.8 m/s^2 = 245 N

The horizontal force required to displace the chandelier 0.16 m is equal to the restoring force divided by the displacement:

Fhorizontal = Frest / (0.16 m) = 245 N / 0.16 m = 1531 N

Rounding to two significant figures, the answer is:

Fhorizontal = 1500 N

B. The tension in the wire can be calculated as the sum of the forces in the vertical direction, which is equal to the weight of the chandelier:

Tension = W = 25 kg * 9.8 m/s^2 = 245 N

Rounding to two significant figures, the answer is:

Tension = 250 N

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Answer:

Explanation:

For intensity of sound in dB scale , the formula is as follows .

intensity in dB = 10 log ( I / 10⁻¹² )

Putting the values given

100 = 10 log ( I / 10⁻¹² )

10 = log ( I / 10⁻¹² )

I / 10⁻¹²  = 10¹⁰

I = 10¹⁰ X 10⁻¹²

I = 10⁻²

I = .01 W /m²

b)

If 3 toadfish are making sound simultaneously ,

Total intensity = 3 x .01 = .03 W / m²

intensity in decibel

= 10 log (3 x 10⁻² / 10⁻¹² )

= 10 log ( 3 x 10¹⁰)

=10 ( 10 + log 3 )

= 10 ( 10 + .477)

= 104.77 dB

Answer:70.6 meters

Explanation:

Answer:

selective attention

Explanation:

Physics is a branch of science which deals with the properties of matter and energy and its nature.

We learn physics to understa

Continents have undergone major shifts around 12 times.

To calculate the number of times continents have gone through major shifts in the 4.6 billion year history of the Earth, we can divide the total time span by the average duration between shifts.

Total time span = 4.6 billion years

Average duration between shifts = 395 million years

To convert the total time span to years, we multiply 4.6 billion by 1 billion (1 billion = 1,000 million).

Total time span in years = 4.6 billion years × 1 billion = 4.6 × 10^9 years

Now we can calculate the number of shifts by dividing the total time span by the average duration between shifts:

Number of shifts = Total time span / Average duration between shifts

               = (4.6 × 10^9 years) / (395 million years)

               ≈ 11.65

Therefore, continents of our planet have gone through major shifts approximately 11.65 times in the 4.6 billion year history of the Earth. Since we cannot have a fraction of a shift, we can round the result to the nearest whole number. Thus, continents have undergone major shifts around 12 times.

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Answer:

Dehydration could possibly take place if lost fluid is not replaced adequately. Hypothermia can not possibly take place due to loss of fluid. Nor can emphysema. So, dehydration looks to be the more suitable answer

Answer:

The unknown substance is Aluminum.

Explanation:

We'll begin by calculating the change in the temperature of substance. This can be obtained as follow:

Initial temperature (T₁) = 25 ⁰C

Final temperature (T₂) = 100 ⁰C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 100 – 25

ΔT = 75 ⁰C

Finally, we shall determine the specific heat capacity of the substance. This can be obtained as follow:

Change in temperature (ΔT) = 75 ⁰C

Mass of the substance (M) = 135 g

Heat (Q) gained = 9133 J

Specific heat capacity (C) of substance =?

Q = MCΔT

9133 = 135 × C × 75

9133 = 10125 × C

Divide both side by 10125

C = 9133 / 10125

C = 0.902 J/gºC

Thus, the specific heat capacity of substance is 0.902 J/gºC

Comparing the specific heat capacity (i.e 0.902 J/gºC) of substance to those given in the table above, we can see clearly that the unknown substance is aluminum.

Answer:

Atoms are the particles that all matter is made from. When two or more kinds of atoms combine, they form pure elements

The answer is option A

Answer:

its molecues

Explanation:

Assuming both forces act horizontally, the net force is in Kathryn's direction with a magnitude of 5 N.

If "towards Kathryn" is taken the be the positive direction, then the net force is

∑ F = 20 N - 15 N = 5 N

Answer:

A machine cannot be 100 percent efficient because output of a machine is always less than input. A certain amount of work done on a machine is lost to overcome friction and to lift some moving parts of the machine

friction and heat and wearing down and fuel sources problems are why machine cannot be 100% efficient.

Hope this helps...

Answer:

the rate of change of the volume of the cylinder at that instant is -2400π km³/s

Explanation:

Given that;

Height of cylinder h = 2.5 km

Radis r = 40 km

radius of the base of a cylinder is decreasing at a rate of 12 kilometers per second

that is; dr/dt = (-12) km/s

we know that; volume of a cylinder V = πr²h

now, we differentiate

dv/dt = π2r×dr/dt×h

so we substitute

dv/dt = 2π × 40 × (-12) × 2.5

dv/dt = -2400π km³/s

Therefore, the rate of change of the volume of the cylinder at that instant is -2400π km³/s

In a DC generator, the generated electromotive force (emf) is directly proportional to the rotational speed of the generator's armature and the strength of the magnetic field within the generator.

This relationship is described by the equation for the generated emf in a DC generator:

Emf = Φ * N * A * Z / 60

Where:

Emf is the generated electromotive force (in volts),

Φ is the magnetic flux density (in Weber/meter^2\(meter^2\) or Tesla),

N is the number of turns in the armature winding,

A is the effective area of the armature coil (in square meters),

Z is the total number of armature conductors, and

60 is a constant representing the conversion from seconds to minutes.

From this equation, we can see that the generated emf is directly proportional to the magnetic flux density (Φ) and the product of the number of turns (N), effective area (A), and the total number of armature conductors (Z). This means that increasing any of these factors will result in a higher generated emf.

The magnetic flux density (Φ) can be increased by using stronger permanent magnets or increasing the strength of the field windings in the generator.

The number of turns (N) and the effective area (A) are design parameters and can be optimized for a specific generator. Increasing the number of turns or the effective area will result in a higher generated emf.

Similarly, the total number of armature conductors (Z) can be increased to enhance the generated emf.

By controlling and optimizing these factors, the generated emf in a DC generator can be increased, resulting in higher electrical output. However, it is important to note that there are practical limits to these factors based on the design and construction of the generator.

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(a) For the density function, the value of B is 2.5 g/cm³   and the value of C is 1.3 g/cm⁴

(b) The total mass of the rod is 1470 g.

The density of the rod is a function of distance and it is given as;

ρ = B + Cx

where;

ρ = 2.5 g/cm³  +  (19.5 g/cm³ ) / ( 15 cm ) x

ρ = 2.5 g/cm³  +  1.3 g/cm⁴  x

The total mass of the rod is calculated by integrating the function;

dm = ( B + Cx)(8 cm² ) dx

m = 8B + 8Cx

m = 8Bx  +  8Cx² / 2

m = ( 8 x 2.5 x 15 )  +  ( 8 x 1.3 x 15² ) / 2

m = 1470 g

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60 miles per hour is equivalent to 26.82 meters per seconds.

Speed is the rate of motion or action or the magnitude of the velocity.

Speed is measured in miles per hour, metres per seconds, kilometers per hour etc.

However, these unit of measurements of speed are inter-convertible. miles per hour can be converted to metres per seconds as follows:

1 mile per hour = 0.447 metre per second

Hence, 60 miles per hour is equivalent to 0.447 × 60 = 26.82m/s.

Therefore, 60 miles per hour is equivalent to 26.82 meters per seconds.

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Answer: A.

It moves away from the normal.

Explanation: ed mentum or plato

The correct answer is C. The inner planets are also called terrestrial planets.

Explanation:

Our solar system includes a total of eight planets. Additionally, planets are classified into broad categories including inner planets and outer planets. The inner planets category applies to planets such as Earth, Mercury, or Mars because these are located within the asteroid belt (region of asteroids between Mars and Jupiter). Moreover, inner planets differ from others due to their composition as they are composed of rocks and metals. Also, due to this composition, these are known as terrestrial planets. According to this, the statement that best describes inner planets is "The inner planets are also called terrestrial planets".

Answer:

The answer is c.) The inner planets are also called terrestrial planets.

Explanation:

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

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The value of  the missing resistance, R₃ = 10.35 ohms.

The value of the missing voltages, V₁ = 6 V, V ₃ = 24 V.

The value of the missing currents, I₁ = 3 A, I₃ = 2.32 A.

The values of the missing component of the circuit is calculated by applying the following formula.

The total resistance of the circuit;

For R₂, R₃, 1/R = 1/R₂ + 1/R₃

1/R = 1/12 +  1/R₃

1/R = (R₃ + 1)/(12R₃)

R = 12R₃ / (R₃ + 1)

For, R₁, R₂ and R₃, total resistance;

R = 12R₃ / (R₃ + 1) + R₁

R = [12R₃ / (R₃ + 1)] + 2

R = (12R₃ + 2(R₃ + 1) ) / (R₃ + 1)

R = (12R₃ + 2R₃ + 2 ) / (R₃ + 1)

R = (14R₃ + 2 ) / (R₃ + 1)

The total current in circuit is calculated as;

I = V/R

I = 30 / R

I = ( 30 ) / (14R₃ + 2 ) / (R₃ + 1)

I = (30R₃ + 30) / (14R₃ + 2) ------- (1)

The voltage in parallel circuit is the same

V₂ = V₃ = 24 V

V₃ = IR₃

24 = IR₃

I = 24/R₃  --------- (2)

Solve (1) and (2) together as follows;

24/R₃ = (30R₃ + 30) / (14R₃ + 2)

30R₃² - 306R - 48 = 0

Solve the quadratic equation, using formula method.

R₃ = 10.35 ohms

I₃ = V₃/R₃

I₃ = 24 V / 10.35

I₃ = 2.32 A

If the voltage drop at R₂ and R₃ = 24 V, the voltage drop at R₁ = 30V - 24 V = 6 V

The current in R₁ = V₁/R₁ = 6 V / 2 V = 3 A

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Answer:

Explanation:

the distance have the following relation:

d = (1/2)gt2

D=32.0 m

t =√ (2D/g) = √(2*32.0m/9.8m/s2) = 2.56s

it take 2.56s from the glasses to hit the ground

when the glasses hit the ground, the pen only travel Δt =2.56s - 2.00s = 0.56s

x = (1/2)g(Δt)2 = 0.5*9.8m/s2*(0.56s)2 = 1.54 m

the pen only travel 1.54m

so the pen is above the ground 32.0m - 1.54m = 30.46m

The pen is 30.46m above the ground. when the glasses hit the ground. It is represented by x.

Height is a numerical representation of the distance between two objects or locations on the vertical axis.

The height can refer to a physical length or an estimate based on other factors in physics or common use. |

The given data in the problem is;

h is the height from the top of a stadium = 32.0 m

t is the time period when the pen is dropped later =  2.00 s

x is the height above the ground

a is the air resistance. a = -g = -9.81 m/s²

From the second equation of motion;

\(\rm H =ut+\frac{1}{2} gt^2 \\\\ \rm H =\frac{1}{2} gt^2 \\\\ \rm t = \sqrt{\frac{2H}{g} } \\\\ \rm t = \sqrt{\frac{2 \times32.0 }{9.81} } \\\\ \rm t =2.56\ sec\)

When the glasses fall to the ground, the pen only travels a short distance;

\(\rm \triangle t = 2.56 -2.00 \\\\ \rm \triangle t = 0.56 \ sec\)

So the pen travel the distance;

\(\rm h= \frac{1}{2} g \triangle t^2 \\\\ \rm h= \frac{1}{2} \times 9.81 (0.56)^2 \\\\ h=1.54 \ m\)

The pen above the ground is found as;

\(\rm x = H-h \\\\ \rm x = 32.0-1.54 \\\\ \rm x =30.46 \ m\)

Hence the pen is 30.46m above the ground. when the glasses hit the ground.

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Answer:

The different types of corn used.

Explanation:

Independent variable: In research methods, the term "independent variable" is determined as a variable that is being manipulated, changed, or altered in an experiment by the experimenter in order to see its effect on the dependent variable. The changes in the dependent variable in an experiment depends on the independent variable directly.

The independent variable in the popcorn experiment is brand of popcorn used.

However, the brand of popcorn was changed in this experiment, hence, the brand of the popcorn is the independent variable.

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Answer:

Direction and magnitude

The airplane will strike the ground at a horizontal distance of 490 meters.

To determine how far the airplane will strike on the ground, we need to consider the horizontal distance traveled by the airplane during its flight.

The horizontal distance traveled by an object can be calculated using the formula:

Distance = Speed × Time

In this case, the speed of the airplane is given as 100 meters per second and the time it takes to cover the distance of 490 meters is unknown. Let's denote the time as t.

Distance = 100 m/s × t

Now, to find the value of time, we can rearrange the equation as follows:

t = Distance / Speed

t = 490 m / 100 m/s

t = 4.9 seconds

Therefore, it takes the airplane 4.9 seconds to cover a horizontal distance of 490 meters.

Now, to calculate the distance on the ground where the airplane will strike, we can use the formula:

Distance = Speed × Time

Distance = 100 m/s × 4.9 s

Distance = 490 meters

It's important to note that this calculation assumes a constant speed and a straight flight path. In reality, various factors such as wind conditions, changes in speed, and maneuvering can affect the actual distance traveled by the airplane.

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Answer:

  19.6 m/s

Explanation:

The velocity is the product of acceleration and time.

__

Here, the acceleration is due to gravity.

  v = at

  v = (9.8 m/s²)(2 s) = 19.6 m/s

The stone hits the ground with a speed of 19.6 m/s.

A stone is dropped from the top of a tower which touches the ground after 2 seconds.

Hence, The stone hit the ground with the velocity speed of 19m/s².

- When you're solving velocity, you're determining how fast an object moves from its original position, with respect to a frame of reference, and a function of time.

- That means an object's velocity will be equal to the object's speed and direction of motion.

"Problem has been solve"

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Answer

due to balanced forces, an object in motion cannot change its direction or speed, and also the net forces act a zero in balanced forces.

Explanation:

Unbalanced forces have a change in motion and they have a resultant force in a direction. Whereas, a balanced force does not change in direction and the resultant force is zero.

Force is an external agent acting on  a body to make it changed in its state of motion or rest or to deform it. There are various kinds of forces such as magnetic force, nuclear force, gravitational force, frictional force etc.

If there are two or more forces acting on a body from the same direction, then the net force will be the sum of all the forces. If the two forces are equal in magnitude and if act from the opposite directions they will cancel each other and will not make a displacement. Such forces are called balanced forces.

The imbalance in force on a body is made by the change in direction or in magnitude of the forces. Then there will be a net force and will make the body a change in its motion.

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