What is the resistance of a light bulb if a potential difference of 120 V will produce a current of 0. 5 A in the bulb? 0. 0042 0. 5 60 240.

Mass of car, M=2000kg

Velocity, V=72× 5/18 =20ms¹

Apply kinematic equation of motion

v² -u² = as

0 − 20² =2a×20

a=−10ms^-2

Breaking force, F=ma=2000×10=20 kN

Apply first kinematic equation

v = u +at

\( t= \frac{v - u}{a} = \frac{0 - 20}{ - 10} = 2sec\\\)

Answer:

s = 50.4 m

Hence, the point C is 50.4 m towards east from point B

Explanation:

Since, the motorcyclist travels at a constant speed in straight line towards east after point B. Therefore, we can use the following equation in this case:

s = vt

where,

s = distance covered = position of point C = ?

v = uniform speed of motorcyclist = 18 m/s

t = time interval = 2.8 s

Therefore,

s = (18 m/s)(2.8 s)

s = 50.4 m

Hence, the point C is 50.4 m towards east from point B

Explanation:

Using equations of motion :

(A) we know that,

u = 0

a = 3.7 m/s^2

S = 63

\( {v}^{2} = {u}^{2} + 2as\)

\(v = \sqrt{0 + 2 \times 3.7 \times 63} = 21.6 \: m{s}^{ - 1} \)

(B)

v = u + at

21.6 = 0 + 3.7 * t

t (time to reach 63 m) = 5.83 seconds

36.99N

Given

Maximum blood pressure  P = 150 mm

Effective area of the aneurysm a = 18.5 cm2.

Expression for the maximum force exerted by blood on an aneurysm is,

f =P * a = (150 mm Hg* (133.322 N/m²/ 1 mmHg)) * ( 18.5 cm² * (1 m² /10000cm²)) = 36.99N

The pressure is computed as the ratio of acting force on an object and the surface area of the object where the force is directed. The pressure is usually measured in terms of Pascal and blood pressure in mm of Hg.

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Answer:

Here are the five main ways to reduce friction:

        Definition: A lubricant is a substance that forms a thin layer between

         the two surfaces in contact.  

Explanation:

Answer:

Make surfaces smooth by grinding.

Lubrication.

Streamlined body.

Reduce pressure or weight on the object.

Reduce contact between surfaces by electrostatic magnetic levitation etc.

Use rolling friction instead of sliding friction.

Use fluid friction instead of the dry friction.

Explanation:

(a) The maximum frequency of revolution is 4.0 rad/s.

b (i) The tension in the string is maximum when the object is at the top of its path and minimum when it is at the bottom of its path.

b (ii) The speed of the mass can be found using the minimum tension in the string is 2 m/s.

The maximum frequency of revolution is given by the maximum tension in the string, which is 60 N.

T = mv² / r

where;

The linear speed is given by:

v = 2πrf

where;

f = √T / (mr²))

f = √(60 / (0.60 x 1.20²))

f = 4.0 rad/s

(i) The tension in the string is maximum when the object is at the top of its path and minimum when it is at the bottom of its path. This is because the tension provides the centripetal force that keeps the object moving in a circular path.

(ii) The speed of the mass can be found using the minimum tension in the string, which is 2.1 N:

T = mv² / r = 2.1 N

Rearranging and solving for v, we get:

v = √(Tr / m)

v = √(2.1 x 1.20 / 0.60)

v = 2.0 m/s

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The microscopic structural subunits of the liver are liver lobules.

Liver lobules are functional units that make up the liver. Each lobule consists of hepatocytes, sinusoids, Kupffer cells, and bile canaliculi. Hepatocytes are the main functional cells of the liver responsible for metabolic functions such as detoxification, protein synthesis, and bile production. Sinusoids are blood vessels that receive blood from the hepatic artery and portal vein, allowing exchange of substances with hepatocytes. Kupffer cells are specialized macrophages involved in immune responses. Bile canaliculi are small ducts that collect bile produced by hepatocytes and transport it towards larger bile ducts. These components work together to maintain liver function and perform essential metabolic and immune-related processes.

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Answer:

no

Explanation:

because the heaver an object the harder it is to move s the force will not be able to move it

The study of radioactivity by Marie Curie marked a significant turning point in the realm of physics and had a significant influence on scientific knowledge. Now let's get into the specifics.

"Radioactivity" is the term Marie Curie coined to describe the phenomenon whereby materials emit radiation that can fog photographic plates. During her uranium investigation in 1896, she made this discovery. This game-changing discovery opened the door for more research into and comprehension of radioactivity, which resulted in important developments in the field of nuclear physics.

Marie Curie's research on radioactivity served as a springboard for additional nuclear physics research and has profound ramifications for other fields of science and medicine. It resulted in improvements in our knowledge of atomic structure, the creation of radiation therapy for the treatment of cancer, and the eventual exploitation of nuclear energy.

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Answer:

The vibrational frequency of the rope is 5 Hz.

Explanation:

Given;

number of complete oscillation of the rope, n = 20

time taken to make the oscillations, t = 4.00 s

The vibrational frequency of the rope is calculated as follows;

\(Frequency = \frac{number \ of \ complete \ vibrations}{time \ taken} \\\\Frequency = \frac{20 }{4 \ s} \\\\Frequency = 5 \ Hz\)

Therefore, the vibrational frequency of the rope is 5 Hz.

The formula for calculating the coefficient of friction is given by:

μ = F / N.

The coefficient of friction formula is a mathematical equation used to calculate the amount of frictional force that exists between two surfaces in contact with each other.

The coefficient of friction is a dimensionless quantity that represents the ratio of the frictional force between two surfaces to the normal force pressing them together.

The formula for calculating the coefficient of friction is given by:

μ = F / N

where μ is the coefficient of friction, F is the frictional force acting between the two surfaces, and N is the normal force pressing the surfaces together.

The coefficient of friction can have values ranging from 0 to 1. A value of 0 indicates no friction between the surfaces, while a value of 1 indicates maximum friction. The coefficient of friction is an important parameter in many engineering and physics applications, such as in designing brakes for vehicles and calculating the force required to move objects over different surfaces.

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The  2018 Earning per share , the 2019 Earning per share  and the amount it will take the 2018 Earning per share  be presented in the 2019 comparative financial statements are all shown on the attached picture.

Earning per share can be described as the earning available after distribution of dividend divided by the number of shares outstanding at the end of the year. This will be reported through net income.

In conclusion, The 2018 EPS - $400,000 / 400,000 = $1.00

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Complete question is :

The Li Group had 202,000 shares of common stock outstanding at January 1, 2018. The following activities affected common shares during the year. There are no potential common shares outstanding

2018  

Feb .28 Purchased 6,000 shares of treasury stock.

Oct 31 Sold the treasury shares purchased on February 28

Nov 30 Issued 24,000 new shares.

Dec 31 Net income for 2018 is $400,000

2019  

Jan. 15 Declared and issued a 2-for-1 stock split

Dec .31 Net income for 2019 is $400,000.

1. Determine the 2018 EPS

2. Determine the 2019 EPS

3. At what amount will the 2018 EPS be presented in the 2019 comparative financial statements?

Let's determine what happens when you add batteries in series.

There are two major ways to wire batteries together which are:

Series and arallel.

A circuit can be said to be in series when there is the same curent flowing through all the components in the circuit.

In a series circuit, when you add a battery, the voltage increases while the supply voltage is divided among the components in the circuit.

Therefore, when you add batteries in series, the voltage is divided among the bulbs equally.

ANSWER:

It is divided among the bulbs.

(a) The force on the spring for each wheel of the given car is 6,000 N.

(b) The compression of each spring when the car rest on the ground is 15 cm.

The given parameters;

The force on the spring for each wheel of the given car is calculated as follows;

\(F = F_1 = F_2 = F_3 = F_4 = \frac{W}{4} \\\\F= \frac{24,000}{4} \\\\F = 6,000 \ N\)

The compression of each spring when the car rest on the ground is calculated as;

\(F= kx\\\\x = \frac{F}{k} \\\\x = \frac{6,000}{400} \\\\x = 15 \ cm\)

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The speed of a 38-gram bald eagle with a momentum magnitude of 0.45 kg m/s is approximately 11.84 m/s. This can be calculated using the momentum formula.

The momentum formula is given by:
momentum = mass × speed

First, we need to convert the mass of the bald eagle from grams to kilograms since the momentum is given in kg•m/s. To do this, we divide the mass in grams by 1000:
mass (kg) = 38 grams ÷ 1000 = 0.038 kg

Now, we can rearrange the momentum formula to solve for the speed:
speed = momentum ÷ mass

Substitute the given values:
speed = 0.45 kg•m/s ÷ 0.038 kg
speed ≈ 11.84 m/s

Therefore, the speed of a 38-gram bald eagle with a momentum magnitude of 0.45 kg•m/s is approximately 11.84 m/s.

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Answer:

When r1 – r2 equal the wavelength of the monochromatic light

Explanation:

This is because to observe a bright fringe a constructive interference pattern of path difference, r1 – r2 = mλ is observed, where m is an integer and λ = wavelength of monochromatic light.

For bright fringes and thus constructive interference, r1 – r2 must be integral multiples of the wavelength, λ. When r1 – r2 , we have the central bright fringe and thus m = 0.

The first order bright fringe which is adjacent to the central bright fringe is obtained when m = 1,

So r1 – r2 = 1 × λ

r1 – r2 = λ

Thus, the path difference required to produce the first order bright fringe that is adjacent to the central bright fringe is when r1 – r2 = λ, the wavelength of the monochromatic light.

Answer:

When the sun shines onto a solar panel, energy from the sunlight is absorbed by the PV cells in the panel. This energy creates electrical charges that move in response to an internal electrical field in the cell, causing electricity to flow.

Answer:

When the sun shines onto a solar panel, energy from the sunlight is absorbed by the PV cells in the panel. This energy creates electrical charges that move in response to an internal electrical field in the cell, causing electricity to flow.

Explanation:

The general (implicit) solution to Stefan's equation is given by:

ln((M^2 + T^2)/(M^2 - T^2)) = 2σt + 2C, where C is the constant of integration.

To solve Stefan's equation, we can separate the variables and integrate both sides. Let's proceed with the steps:

First, rewrite the equation as follows:

(1/(M^4 - T^4)) * dT/dt = σ

Now, we integrate both sides with respect to t:

∫(1/(M^4 - T^4)) * dT = ∫σ * dt

The left side of the equation requires integration by partial fractions. The integral can be expressed as:

1/(M^4 - T^4) = A/(M^2 + T^2) + B/(M^2 - T^2)

To determine the constants A and B, we can use the method of partial fractions. Multiply through by (M^4 - T^4) and then equate the numerators:

1 = A(M^2 - T^2) + B(M^2 + T^2)

Expanding and rearranging, we have:

1 = (A + B)M^2 + (A - B)T^2

Equating the coefficients of the powers of T, we get:

A + B = 0 (coefficient of T^2)

A - B = 1 (constant term)

Solving these equations simultaneously, we find A = 1/2 and B = -1/2.

Substituting the partial fraction decomposition back into the integral, we have:

∫(1/(M^4 - T^4)) * dT = ∫(1/2)*((1/(M^2 + T^2)) - (1/(M^2 - T^2))) * dT

Integrating both sides, we obtain:

(1/2) * (ln(M^2 + T^2) - ln(M^2 - T^2)) = σt + C

where C is the constant of integration.

Finally, solving for T, we can write the general (implicit) solution to Stefan's equation as:

ln((M^2 + T^2)/(M^2 - T^2)) = 2σt + 2C

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Answer:

Explanation:

Given:

H = 75 m

Δt = 0.091 s

g =9.81 m/s²

_________

V₀ - ?

Assume that the stool fell freely, then the time of its fall:

H = g·t²/2

t = √ (2·H / g) = √ (2*75 / 9.81) ≈ 3.910 s

The refrigerator was thrown down with initial speed and fell:

t₁ = t - Δt = 3.910 - 0.091 ≈ 3.82 s

Find the initial chip of the refrigerator:

H = V₀·t₁ + g·t₁²/2

V₀·t₁ = H - g·t₁²/2

V₀ =H / t₁ - g·t₁ / 2

V₀ = 75 / 3.82 - 9.81·3.82 / 2 ≈ 0.90 m/s

So, at first, the stool is simply released from the hands, and the refrigerator is thrown down with the initial speed 0.90 m/s

The acceleration of the person being dragged on the sled is zero. The acceleration due to gravity is approximately 9.8 m/s², the mass of the person is approximately 68.04 kg (150 pounds / 2.2046).

The person being dragged on the sled is moving at a constant speed, which means there is no change in velocity. According to Newton's second law of motion, the net force acting on an object is equal to the mass of the object multiplied by its acceleration. The person's weight of 150 pounds can be converted to mass using the formula: mass = weight / acceleration due to gravity.

Since the person is moving at a constant speed, the net force acting on them must be zero. The force of 50 N exerted by the friend pulling the rope is balanced by the force of friction opposing the motion.

Therefore, the acceleration of the person being dragged on the sled is zero. The force of friction in this case is equal in magnitude and opposite in direction to the force applied by the friend. This balance of forces allows the person to maintain a constant speed while being dragged up the hill.

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The angular diameter of the crater on the moon is approximately 1.10 x 10^-7 radians.

The angular diameter (in radians) of a crater on the moon if the physical diameter is 1.2 x 10¹ meters, with an assumption that the distance to the moon is 3.84 x 10⁸ meters can be calculated by making use of the following equation:

`θ=2arctan(d/2D)`

Where:

θ = angular diameter of the crater

d = physical diameter of the crater

D = distance to the moon

Substituting the given values into the equation above:

`θ=2arctan(1.2x10^1/2(3.84x10^8))`

The expression above can be solved using a calculator:

θ ≈ 1.10 x 10^-7 radians

Therefore, the angular diameter of the crater on the moon is approximately 1.10 x 10^-7 radians.

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5m I think,maybe, not a 100% sure die

Answer:

5m i think

Explanation:

WHATS THE ANSWER HELP!!

Answer:

Used for measuring the distance traveled by a vehicle, such as a bicycle or car.

Explanation:

Answer:

it measures distance travelled by the vehicle

Ans: A student has two magnets of equal strength. She places one on each side of a ramp. She releases a steel ball down the ramp. The student repeats her procedure with both.

Explanation:

Answer: It increased by a factor of 5

Explanation:

Gravitational potential energy  is given by the following formula:

Work done by the farmer to lift the bucket of water to ground level is 484.5 J

Work done by a force is equal to the scalar product of the force applied and displacement. If d displacement happens on applying a force F, then work done, W by the force is

W = F. d

Given: Depth of well, d = 9.5 m

Force to pull the bucket of water upwards,  F1 = 51 N

Work done = F1 × d = 51 × 9.5 = 484.5 J

Therefore, work done by the farmer to lift the bucket of water to ground level is 484.5 J

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The complete question is :

A farmer is using a rope and pulley to lift a bucket of water from the bottom of a well that is hy = 9.5 m deep. The farmer uses force F1 = 51 N to pull the bucket of water directly upwards. The total mass of the bucket of water is mb = 3.7kg. Calculate how much work Wf in J the farmer does on the bucket of water (via the rope) to raise it to ground level.

Answer:

131 N

Explanation:

F = 82.0 kg x 1.60 m/s^2 = 131.2 N

Answer:

Explanation:

Formula

E = I * R                                      Substitute the givens into the formula

Givens

E = 120 volts

I = ?

R = 4800 0hms

Solution

Ohms law is a 3 letter equation that relates volts ohms (resistance) * current (in amperes)

E = i * R

120 V = I * 4800 ohms               Divide both sides by 4800  

120 V/4800 = I * 4800/4800     Divide

0.025 amps = I

Answer

I = 0.025 amps

The ranking of the following by their power output, from highest to lowest is as follows:

In physics, power may be defined as the amount of energy that is considerably transferred or converted per unit of time. In the International System of Units, the unit of power is the watt.

Early locomotives and railcars with internal combustion engines ran on kerosene and gasoline. While internal combustion engines can operate well across a limited range of power, low-power gasoline engines may be coupled to mechanical gears. Therefore, Boeing 777 jet engine operating at full power (75 Megawatts) represents the highest power output.

Therefore, the ranking of the following by their power output, from highest to lowest is well mentioned above.

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