During emission, a photon is emitted as there is a loss in energy of what?.

The amount of heat released outside is 3.5 kJ and the coefficient of performance is 2.

The efficiency of the a machine or any device is the measure of effectiveness of the device. Efficiency describes how a machine converts input energy to output energy without wasting much of the input energy.

Mathematically, efficiency of a machine is given as;

E = output energy / input energy  x 100%

The coefficient of performance  (COP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work required.

The energy released outside = 3.5 kJ

COP = 3.5 kJ / 1.75 kJ

COP = 2

Learn more about coefficient of performance here: https://brainly.com/question/13756267

#SPJ1

Answer:

с

creates its own light, which is blocked by the Sun during an eclipse.

Explanation:

might not be right but its what i remember

Explanation:

vertical force = 460,000 * sin(70) - 300,000

Fv = 187,717.75N

Answer:

Looks like its c 2x 10 m

Explanation:

i do see the question

Answer:

The tissues in a multicellular organism requires a circulatory system in other to deliver oxygen and food to the tissues while also removing carbon dioxide and metabolic wastes due the complexity of these activities

Explanation:

Multicellular organisms are organisms that are made of more than one cell. the more cells an organism has the more complex certain activities might be for the organism hence the tissues in a multicellular organism requires a circulatory system in other to deliver oxygen and food to the tissues while also removing carbon dioxide and metabolic wastes

Answer:

Coording metal is a physical change.

Most of the symptoms of physical dependence on tobacco pass in a matter of weeks to a few months after quitting smoking.

Most of the symptoms of physical dependence on tobacco pass in a matter of weeks to a few months after quitting smoking.

Physical dependence on tobacco is primarily caused by the addictive substance nicotine present in tobacco products. When someone smokes or uses tobacco regularly, their body becomes accustomed to nicotine and develops a tolerance, leading to withdrawal symptoms when they try to quit.

Withdrawal symptoms associated with nicotine dependence can include cravings for tobacco, irritability, anxiety, difficulty concentrating, increased appetite, restlessness, and sleep disturbances. However, these symptoms are typically temporary and gradually diminish over time.

Within the first few weeks of quitting smoking, the intensity and frequency of withdrawal symptoms tend to reduce significantly. After several months, most individuals experience a significant reduction or complete resolution of physical dependence symptoms.

It's important to note that the duration and severity of withdrawal symptoms can vary among individuals, and additional support, such as counseling or nicotine replacement therapy, can help manage the process of quitting and reduce the impact of withdrawal symptoms.

To know more about tobacco here

https://brainly.com/question/32881991

#SPJ4

Where a tap supplies water at 26°c while another supply at 82°c. If a man wishes to bath with water at 40°c, then the ratio of the mass of hot water to that of cold water is: 1/3.

The ratio of the mass of hot water to that of Cold water is determined as follows:

M₁C (82  40) = M₂C (40-26)

Where M₁C is the Mass of Tap 1; and

M₂C is the Mass of Tap 2.

Thus,

M₁C (82  40) = M₂C (40-26)

M₁/M₂ = 14/42

= 1/3

Thus, it is right to state that the ratio of the mass of hot water to that of cold water is: 1/3.

Learn more about Mass:
https://brainly.com/question/19694949
#SPJ1

7 bright fringes lie between the first and second minima of the diffraction envelope.

Diffraction is defined because of the interference or bending of waves around the corners of an obstacle or via an aperture into the vicinity of the geometrical shadow of the impediment/aperture. The diffracting object or aperture correctly becomes a secondary source of the propagating wave.

Refraction is the alternate in direction of waves that takes place whilst waves journey from one medium to another. Refraction is always accompanied by means of a wavelength and speed alternate. Diffraction is the bending of waves around barriers and openings. the amount of diffraction increases with increasing wavelength.

Calculation:-

Here d = 15 a/2(since there are 15 bright fringes ).

Then for the first minimum which occurs at an angle1

then a sin? 1 =? (m=1)

For the second minimum which occurs at an angle= of 2

then a sin?2 = 2? (m=2)

then we calculate the values of m for which

1 < ?< ?2 for sin?1 < sin?< sin?2 ? < 2m?/15 <2?

that is 1<2m/15 <2

Hence, there are 7 bright fringes.

Learn more about diffraction here:-https://brainly.com/question/16749356

#SPJ4

Explanation:

mass = newton ÷ g

m = 1025 ÷ 10

mass= 102.5kg

Answer:

Each ribbon = 10 inches

Explanation:

Each yard = 36 inches

4 2/3 * 36 = 168 inches      now cut off 8 inches

   160 inches

now make 16 ribbons     160 / 16 = 10 inches

It increases proportionately with body mass in this way energy cost per mile relate to body mass.

An individual's height and weight are used to calculate their body mass index. The body mass index (BMI) is calculated by dividing the body weight in kilograms by the square of the height in meters. It is expressed in kilograms per square meter (kg/m2) and is a function of both height and weight. Weight in kilograms divided by height in meters squared yields the Body Mass Index (BMI) of a person. High levels of body fat may be indicated by a high BMI. A person's body mass index (BMI) does not provide a diagnosis of their health or body fatness; rather, it is a screening tool for weight categories that may cause health issues. Based on your height, weight, and BMI, you can calculate your body fat percentage. BMI measurements are widely regarded by doctors as an easy way to assess a person's weight and determine whether they are overweight or underweight, or whether they are healthy.

Learn more about body mass here:

https://brainly.com/question/22826897

#SPJ4

Answer:

v = 19.6 m/s.

Explanation:

Given that,

The radius of the circle, r = 5 m

The time period of the ball, T = 1.6s

We need to find the ball's tangential velocity.

The formula for the tangential velocity is given by :

\(v=\dfrac{2\pi r}{T}\)

Putting all the values in the above formula

\(v=\dfrac{2\pi \times 5}{1.6}\\\\v=19.6\ m/s\)

So, the tangential velocity of the ball is 19.6 m/s. Hence, the correct option is (c).

Answer:

Option C. 83.8 J

Explanation:

From the question given above, the following data were obtained:

Mass (m) of object = 2 Kg

Velocity (v) of the object = 5 m/s

Height (h) = 3 m

Mechanical energy =.?

Next, we shall determine the kinetic energy of the object. This can be obtained as shown below:

Mass (m) of object = 2 Kg

Velocity (v) of the object = 5 m/s

Kinetic energy (KE) =?

KE = ½mv²

KE = ½ × 2 × 5²

KE = 1 × 25

KE = 25 J

Next, we shall determine the potential energy of the object. This can be obtained as shown below:

Mass (m) of object = 2 Kg

Height (h) = 3 m

Acceleration due to gravity (g) = 9.8 m/s²

Potential energy (PE) =.?

PE = mgh

PE = 2 × 9.8 × 3

PE = 58.8 J

Finally, we shall determine the mechanical energy of the object. This can be obtained as shown below:

Kinetic energy (KE) = 25 J

Potential energy (PE) = 58.8 J

Mechanical energy =?

Mechanical energy = KE + PE

Mechanical energy = 25 + 58.8

Mechanical energy = 83.8 J

Answer:

5s

Explanation:

initial distance: 0 m

distance: ? (we don't know)

initial velocity: 0 m/s

velocity: 30 m/s

acceleration: 6 \(m/s^{2}\)

time: ? (we are looking for)

v = v0 + at

plug the numbers in:

30 = 0 + 6(t)

= 30 = 6t

= t = 5

5s

Given the velocity versus time graph of an object.

From the graph, the velocity of object A is constant as the line representing its velocity is horizontal. The velocity of object a is decreasing with time. That is, object B is decelerating.

From the graph, at t=5 s the value of the instantaneous velocity of object A is 0 m/s.

And the value of the instantaneous velocity of object B is the same throughout the graph. And the value is 4 m/s.

Thus the value of the instantaneous velocity of object B is greater than that of object A.

Thus the correct answer is B has the greater value

Answer:

p = 120000 kg · m/s

Explanation:

p = mv

p=momentum

m=mass

v=velocity

p = (4800)(25)

p= 120000 kg · m/s

Answer:

\(momentum = mass \times velocity \\ = 4800 \times 25 \\ = 120000 \: kgm {s}^{ - 1} \)

Answer:

The horizontal distance traveled by the skydiver is 510.8 m.

Explanation:

Given;

height of fall, h = 800 m

initial velocity of the airplane, u = 40 m/s

The time to fall to the ground is calculated as;

\(t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2 \times 800}{9.81} }\\\\t = 12.77 \ s\)

The horizontal distance or range of the motion is calculated as;

R = ut

R = 40 m/s x 12.77 s

R = 510.8 m

Therefore, the horizontal distance traveled by the skydiver is 510.8 m.

Answer:

In order to convert density to grams, you have to put the mass on one side of the equation, and the density and the volume on the other. Therefore, d * v = m. Multiply the density by the volume. Using the example in step 1, you would multiply 2 g/mL by 4mL.

Explanation:

ok

When an object is placed 20 cm from a diverging lens and a reduced image is formed, the following statement is necessarily true: d. the focal length of the lens may be less than 20 cm.

When an object is placed 20 cm from a diverging lens and a reduced image is formed, we can infer certain properties based on the nature of the lens and the resulting image.

a. The image is inverted: Since a diverging lens always produces virtual and upright images, the image formed in this case will also be upright. So, statement a is not necessarily true.

b. The image could be real: A diverging lens always produces virtual images that cannot be projected onto a screen. Therefore, statement b is not true.

c. The image distance must be greater than 20 cm: When a diverging lens forms a reduced virtual image, the image distance is negative. It means that the image is formed on the same side as the object. So, statement c is not true.

d. The focal length of the lens may be less than 20 cm: This statement is necessarily true. A diverging lens has a negative focal length, and the image formed by the lens will be virtual and reduced when the object is placed within the focal length of the lens.

e. The refractive power of the lens must be greater than 0.05 diopters: The refractive power of a lens is given by the reciprocal of the focal length. Since the focal length can be negative for a diverging lens, the refractive power can be negative as well. Therefore, statement e is not necessarily true.

Learn more about lens here: https://brainly.com/question/29834071

#SPJ11

Answer:

PART A:

The geese initially fly 5.0 km due west. This movement is entirely in the west direction, so the west component (dw) is equal to 5.0 km.

Therefore, the geese are 5.0 km west of their initial position.

PART B:

After flying 5.0 km due west, the geese turn toward the north by 50° and fly another 4.5 km.

To determine the displacement (d), we need to find the resultant of their west and north components.

West component: The initial movement of 5.0 km due west does not change after turning north. So the west component of displacement remains the same at 5.0 km.

North component: The geese fly 4.5 km in the north direction. Since they turn by 50° from west, we can use trigonometry to find the north component (dn).

dn = 4.5 km * sin(50°)

dn ≈ 3.454 km

The displacement (d) is the magnitude of the resultant of the west and north components. We can use the Pythagorean theorem to find the magnitude:

d = sqrt(dw^2 + dn^2)

d = sqrt((5.0 km)^2 + (3.454 km)^2)

d ≈ 6.076 km

Therefore, the geese are approximately 6.076 km away from their initial position, and their displacement is approximately 6.076 km.

The flock of geese is initially 5.0 km west of their starting position. Their displacement, considering both the westward and northward movements, is approximately 5.2 km.

In the given scenario, the geese first fly 5.0 km due west. This indicates a purely westward displacement. Therefore, the distance west of their initial position is 5.0 km.

Afterward, the geese turn toward the north by an angle of 50 degrees and continue flying for another 4.5 km. This northward displacement can be broken down into its vertical and horizontal components. The vertical component can be found by multiplying the distance flown (4.5 km) by the sine of the angle (50 degrees). The horizontal component can be found by multiplying the distance flown (4.5 km) by the cosine of the angle (50 degrees).

Calculating the vertical component: 4.5 km × sin(50°) ≈ 3.42 km

Calculating the horizontal component: 4.5 km × cos(50°) ≈ 2.90 km

To find the magnitude of the total displacement, we can use the Pythagorean theorem. The total displacement is the square root of the sum of the squares of the horizontal and vertical components.

Calculating the magnitude of displacement: √(5.0 km² + 2.90 km² + 3.42 km²) ≈ √39.97 km² ≈ 6.32 km

Therefore, the geese are approximately 5.0 km west of their initial position, and their displacement is approximately 6.32 km.

To learn more about displacement refer:

https://brainly.com/question/29769926

#SPJ11

The maximum height attained by the projectile in terms of h is 12h/7.

The maximum height attained by the projectile is calculated by applying the following formula as shown below.

H = v² sin²θ / 2g

where;

H = ( v² ( sin 60 )² ) / 2g

H = ( v² x ³/₄ ) /2g

H = 3v² / 8g

To solve for the maximum height attained by the projectile in terms of h is calculated as follows;

vf² = vi² - 2gh

2gh = vi² - vf²

h = (vi² - vf²) /2g

where;

h = (v² - (3v/4)²) / 2g

h = (v² - 9v²/16) / 2g

h = (7v²/16) / 2g

h = 7v² / 32g

7v² = 32gh

v² = 32gh/7

The maximum height becomes;

H = 3v² / 8g

H = 3(32gh / 7) / 8g

H = (3 x 32 gh) / (7 x 8g)

H = 12 h / 7

Learn more about maximum height here: https://brainly.com/question/12446886

#SPJ1

The symbol for "d" in Brenda's heliocentric model most likely represents the planet Mercury.

In the heliocentric model, the symbol "d" usually represents the planet Mercury because it is the planet closest to the Sun. The heliocentric model was proposed by Copernicus in the 16th century, and it states that the Sun is the center of the solar system, and all the planets revolve around it.

Brenda's diagram shows the Sun at the center, surrounded by the planets Mercury and Universe, as well as the entire solar system. Since Mercury is the planet closest to the Sun, it is most likely represented by the symbol "d" in the diagram. Overall, Brenda's heliocentric model is a simplified representation of the solar system and its components, and it helps us understand the relationships between the Sun, planets, and universe.

Learn more about heliocentric model here:

https://brainly.com/question/957540

#SPJ11

Answer:

Ra, 88

Ru, 44

Cr, 24

Explanation:

i

the remaining mass number is 224(228 - 4), and it's atomic number is 88(90 - 2). The element is Radium, Ra

ii

the remaining mass number is 98(98 - 0), and it's atomic number is 44(45 - 1). The element is Ruthenium, Ru

iii

The remaining mass number is 52(52 - 0), and it's atomic number is 24(23 - -1). The element is Chromium, Cr

The fishing pole will move upwards due to the net force of 2 N in the upward direction.

The net force acting on an object determines its direction of motion. In this case, the force applied by Michelle is greater than the force exerted by the fish.

The net force is obtained by subtracting the downward force from the upward force:

3 N - 1 N = 2 N.

Since the net force is in the upward direction, the fishing pole will move in the same direction as the net force, which is upward.

Learn more about forces and motion here:

brainly.com/question/13191643

#SPJ11.

Answer:

it would move faster

Explanation:

If the roller coaster car in the above problem were moving at twice the speed, then 16000 Joules is the new kinetic energy.

Kinetic energy is a type of power that a moving object or particle possesses. An item accumulates kinetic energy when work, which involves the transfer of energy, being done on it by exerting a net force.

A object in motion or particle has kinetic energy, which relies on both its mass and its rate of motion. Any combination of movements, including translation, rotation along an axis, and vibration, may constitute the kind of motion.

kinetic energy= ½mv²

v =4m/s

m= 2000kg

KE = ½ (2000) (4)²

    =16000 Joules

Therefore, If the roller coaster car in the above problem were moving at twice the speed, then 16000 Joules is the new kinetic energy.

To learn more about kinetic energy, here:

https://brainly.com/question/22174271

#SPJ2