an earth satellite has its apogee at 2500 km above the surface of earth and perigee at 500 km above the surface of earth. at apogee its speed is 6260 m/s. what is its speed at perigee? earth's radius is 6370 km (see below). satellite orbit

The Carnot refrigerator operates on the principle of transferring heat from a cooler region to a hotter region with the help of external work. The amount of heat that the refrigerator can remove from its inside compartment can be determined using the equation:

QC = W*(TC/TH - 1)



Efficiency (η) = (Tc / (Th - Tc))

Where Tc is the cold temperature (inside the refrigerator) and Th is the hot temperature (kitchen temperature). In this case, Tc = 277 K and Th = 287 K.

First, calculate the efficiency:

η = 277 / (287 - 277) = 277 / 10 = 0.277

Next, we can use the formula for the heat removed from the inside compartment, which is given by:

Qc = W / η

Where Qc is the heat removed and W is the work done. In this case, W = 2250 J.

Finally, calculate the heat removed:

Qc = 2250 / 0.277 ≈ 8103 J

So, the refrigerator can remove approximately 8103 Joules of heat from its inside compartment using 2250 Joules of work.

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C) acts on all objects.

Newton's explanation of Kepler's laws of planetary motion relied on the force of gravity, which he postulated acts on all objects with mass in the universe.

The force of gravity between two objects is proportional to their masses and inversely proportional to the square of the distance between them. By using this concept, Newton was able to explain the motion of planets and other celestial bodies, and derive his own laws of motion.

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Answer:

B. 90km/hr

Explanation:

The formula for finding velocity =

Displacement/time

The displacement of the car has been given to be = 1215 km West

Time it took to go from Dallas to Paso = 13.5 hours

Then velocity = 1215/13.5

= 90

Therefore velocity = 90km/hour

Option B is the correct answer to this question.

Thank you!

Answer:

a) 102 meters

b) 14 meters

c) The direction is eastward.

Explanation:

Distance is said to be the length between two points. It is a scalar quantity.

a) The distance moved = 36 + 44 + 22

                                       = 102 meters

b) Displacement is the distance moved in a specified direction.

Representing the distance moved with specific direction as a directed number, 36 meters eastward = +36, 44 meters westward = -44, and 22 meters eastward = +22

/Displacement/ = +36 -44 +22

                         = +58-44

                         = 14

The magnitude of the displacement is 14 meters.

c) The direction is eastward.

So that the magnitude of displacement and his direction is 14 meters eastward.

The magnitude of the electric force exerted on the object located at the origin is most nearly is a). 0.47 N.

To calculate the magnitude of the electric force exerted on the object at the origin, we need to find the force due to each of the other two objects and then add them up using vector addition.

The electric force between two point charges is given by Coulomb's Law:

\(F = k(q1q2)/r^2\)

where

For the object at the origin, the distance to the object with charge \(-2q\) is \(d = 0.3\) m and the distance to the object with charge \(+3q\) is also \(d = 0.3\) m.

The force due to the object with charge \(-2q\) is:

\(F1 = k(q1q2)/r^2 = (9 x 10^9 Nm^2/C^2) \times (q \times (-2q))/(0.3 m)^2 = -3.6 x 10^{-6} N\)

Note that the negative sign indicates that the force is attractive (since the two charges have opposite signs).

The force due to the object with charge \(+3q\) is:

\(F2 = k(q1q2)/r^2 = (9 x 10^9 Nm^2/C^2) \times (q \times 3q)/(0.3 m)^2 = 1.62 \times 10^{-5} N\)

Note that the positive sign indicates that the force is repulsive (since the two charges have the same sign).

To find the total force on the object at the origin, we add the two forces:

\(F_{total} = F1 + F2 = -3.6 \times 10^{-6} N + 1.62 \times 10^{-5} N = 1.26 \times 10^{-5} N\)

The magnitude of this force is approximately 0.0126 N, which is closest to answer choice (A) 0.47 N.

Therefore, the answer is (A) 0.47 N.

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Answer:

chemical energy, Energy stored in the bonds of chemical compounds. Chemical energy may be released during a chemical reaction, often in the form of heat; such reactions are called exothermic

Explanation:

hope it will help you

A 60-kilogram individual ascends an 80 m-high building's roof by walking up from the ground. Once at the peak, the human has a potential energy of 44027.28 J.

This is our formula

Gravitational ability strength = mgh  

here (GPE = mgh)

mg = 60.0 kg

h = 80

mg = 60.0 kg

in view that we're searching for pressure and the SI Unit for force is "N," we must convert this to force (N).

consequently, we will multiply 60.0 via nine.81.

60.0 × 9.81 = 588.6

Now that will be

⇒ mg = 588.6 N

⇒ h = 80

GPE = (588.6) × (80) = 47088 J

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Explanation:

The acceleration due to gravity on the surface of the Moon is 1.635 m/s² and on the surface of Venus is 8.8634 m/s².

There is acceleration, gravitational force, and acceleration due to gravity, all three are completely different from each other.

We know that the acceleration of gravity on the moon = 1/6 acceleration of gravity on the Earth

Therefore, the acceleration of gravity on the surface of the moon is given as

= 9.81 / 6

= 1.635 m/s²

b) For any planet (Venus) the acceleration of gravity is given as

g = GM/ R²

G = 6.67 × 10⁻¹¹

M = 4.88 × 10²⁴

R = 6.06 × 10⁶

g = ( 6.67 × 10⁻¹¹)(4.88 × 10²⁴) / (6.06 × 10⁶)²

g = 8.634 m/s²

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Answer:

By charging the two bodies oppositely by any electrostatic method such as induction, or rubbing.

The definition of mass is: Mass is a measure of how much matter there is in a substance. So, option (c) is correct.

In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter. It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force.

The change caused by an applied force is smaller the more mass a body has. The kilogram serves as the unit of mass in the International System of Units (SI).

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The maximum energy that can be transferred by the electrical generator is  2.7×10¹³ Joules.

We can use the equation of electric power and electric energy.

Electric Power: This can be defined as the ratio of the electric energy to the time of electrical equipment.

⇒ Formula

⇒Where:

make E the subject of the equation

From the question,

⇒ Given:

⇒ Substitute these values into equation 2

Hence, the maximum energy that can be transferred by the electrical generator is  2.7×10¹³ Joules.

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The maximum energy that can be transferred by the generator is 2.7×10¹³ J

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

The energy can be obtained as follow:

E = Pt

E = 1.5×10⁹ × 18000

E = 2.7×10¹³ J

Therefore, the maximum energy that can be transferred by the generator is 2.7×10¹³ J

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Block 4 shows the greatest rise in temperature. The rise in the temperature is inversely proportional to the initial length. The concept of thermal expansion is used in the given problem.

Thermal expansion is the tendency of matter to alter its form, area, volume, and density in response to a change in temperature.

The formula for the thermal expansion is found as;

\(\rm \triangle L = L \alpha \triangle T \\\\\ \triangle T = \frac{\triangle L}{L\alpha}\)

The rise in the temperature is inversely proportional to the initial length;

Block 4 has the smallest initial length.

Hence, the block 4 has the greatest rise in temperature.

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Answer:

static stretching

Explanation:

hope this helped ^^

Answer:

A.ksdkalmblnabzusbsmxlwiwbdhz

Yes, it is true that suspended matter that floats in the air, such as ash, soot, mold, spores ane road dust, is known as particulates.

Particulate can be defined as a particle which is extremely small in size and his suspended in the atmosphere.

The particles of dust, ash, soot, mold, spore and road dust are some of the particle which are very small in size and comes into the category of particulate.

This particulate matters adds up to the air pollution of the atmosphere.

This is why we can conclude that the statement given to us is completely true.

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The wavelength of the electron which has a speed of  1.9 x 10⁸ m/s is 0.384 x 10⁻¹² m.

The speed of the electron = 1.9 x 10⁸ m/s

The wavelength of the electron can be found using the formula

                  λ = h/mv

where λ is the wavelength

           h is the Planck constant

           m is the mass of the electron

           v is the velocity of the electron

Let us substitute the known values in the above equation,

                  λ = 6.636 x 10⁻³⁴ / 9.1 x 10⁻³¹ x 1.9 x 10⁸

                     = 6.636 x 10⁻³⁴ / 17.29 x 10⁻²²

                     = 0.384 x 10⁻³⁴ x 10²²

                     = 0.384 x 10⁻¹² m

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Answer: -3x+13

Explanation:

The slope of the line that passes through the point (3,4) is 1/3. Then , the intercept of the perpendicular line is 3 . Then, the equation of the line is y = 1/3x + 3.

Coordinates are numbers which describes the position of a shape, curve or line. The coordinates are written in terms of x and y axis values. A line or curve passing through certain points can be represented by an equation.

For a straight line the equation is y = mx + c

where m is the slope of the line and c be the intercept on y- axis.

For two perpendicular lines, the slope will be opposite inverse of each other.

The slope of the line y = -3x + 1 is -3. Then, the slope of the line which is perpendicular to this line is - (1/-3) = 1/3.

Then the equation of the line is y = 1/3 x + c.

given the line passes through the point (3,4).

Then,

4 = 1/3×3 + c

c = 3.

Therefore, the equation of the second line is y = 1/3 x + 3.

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To develop a sampling plan for LSI circuit chips, an electronics firm should consider the AQL (Acceptable Quality Level) of 0.15 specified by the LSI manufacturing department and the LTPD (Lot Tolerance Percent Defective) of 0.40 acceptable by the assembly department.

The sampling plan should involve selecting a representative sample of LSI circuit chips from the manufacturing department and conducting tests to determine their quality. The AQL of 0.15 means that the manufacturing department will tolerate no more than 15% defective chips in a given sample. Therefore, the sampling plan should ensure that the sample size is large enough to provide statistical confidence in determining the quality level of the chips.

The assembly department's LTPD of 0.40 indicates the maximum allowable defective rate for the chips after assembly. This implies that the sampling plan needs to consider the overall quality of the chips and their performance in the final analog devices.

To execute the sampling plan, one could follow these steps:

1. Determine the appropriate sample size based on statistical calculations, taking into account the desired confidence level and the acceptable quality levels specified by both departments.

2. Randomly select the required number of LSI circuit chips from the manufacturing department.

3. Perform thorough testing and inspection on the selected chips to identify any defects or anomalies.

4. Calculate the defect rate based on the number of defective chips found in the sample.

5. Compare the defect rate with the specified AQL and LTPD to assess if the chips meet the required quality standards.

6. Provide feedback to the manufacturing and assembly departments based on the results, taking necessary actions if the quality standards are not met.

By following this sampling plan, the electronics firm can ensure that the LSI circuit chips meet the required quality standards and are suitable for use in analog devices.

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The magnitude of the resultant force of 18lbs and 20lbs act on an object at 120 degrees is 19.1lbs

To determine the magnitude of the given forces of 18lbs and 20lbs act on an object at 120 degrees, we have to find the magnitude of the resultant force. We can use the cosine rule to calculate the resultant force.

The cosine rule states that

c² = a² + b² - 2ab cos(C)

where c is the side opposite the angle C, and a and b are the other two sides.

Therefore, the magnitude of the resultant force can be calculated as follows:

R²= F₁₂ + F₂₂- 2(F₁)(F₂)cos(120)

R² = (18)² + (20)² - 2(18)(20)cos(120)

R² = 324 + 400 - 360

R² = 364

∴R = √364

≈19.1lbs

Thus, the magnitude of the resultant force is approximately 19.1lbs.

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a) The total resistance of the circuit in which three 45 ohm lightbulbs and three 75 ohm light bulbs connected in series is 360 ohm.

b) The total resistance of the circuit if all six are wired in parallel is 28.57 ohm.

a) In order to find the series total resistance, we need to add all resistances,

Req = R₁ + R₂ + R₃ + R₄ + R₅ + R₆ = 45 + 45 + 45 + 75 + 75 + 75 = 135+ 225 = 360 ohm

b) Now, since the resistances are in parallel, we need to use the expression below,

1/Req = 1/R₁ + 1/R₂ + 1/R₃ + 1/R₄ + 1/R₅ + 1/R₆

Putting in the values,

1/Req = 1/45 + 1/45 + 1/45 + 1/75 + 1/75 + 1/75

1/Req = 1/0.035

Req = 28.57 ohm

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The magnitude of the angular momentum of the particle about the point O is 144kgm^2/s

Given mass of particle (m) = 6kg

speed of particle (v) = 4m/s

Let the distance of particle from the object R = 12m from the diagram

From the diagram given the angle of direction = 30deg

We can see the perpendicular component of the velocity.

The angle from point O to the perpendicular component is 60deg

Angular momentum (L) = mvrcos 60 = 6kgx4m/sx12mxcos 60 = 144kgm^2/s

Hence the magnitude of the angular momentum of the particle about the point O is 144kgm^2/s

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Answer:

Velocity

Explanation:

hope this helps

Answer:

Speed in a given direction is called velocity.

Explanation:

The range of wavelengths for AM radio waves is between: 187 meters (smallest) and 550 meters (largest).

To determine the range of wavelengths for AM radio waves with frequencies between 545.0 kHz and 1605.0 kHz, we'll use the formula:

Wavelength (λ) = Speed of light (c) / Frequency (f)

The speed of light (c) is approximately 3.0 x 10^8 meters per second (m/s).

For the smallest wavelength, we'll use the largest frequency, which is 1605.0 kHz (or 1.605 x 10^6 Hz):

Smallest λ = (3.0 x 10^8 m/s) / (1.605 x 10^6 Hz) ≈ 187 meters

For the largest wavelength, we'll use the smallest frequency, which is 545.0 kHz (or 5.45 x 10^5 Hz):

Largest λ = (3.0 x 10^8 m/s) / (5.45 x 10^5 Hz) ≈ 550 meters

So, the range of wavelengths for AM radio waves is between 187 meters (smallest) and 550 meters (largest).

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Complete question:

AM radio waves have frequencies between 545.0 and 1605.0 kHz. Determine the range of wavelengths for these waves. (Enter your answers from smallest to largest.)

Smallest:

Largest:

Answer:

My quiz said "by pushing for laws that helped improve working conditions and increase wages."

Explanation:

hopefully this helpes i dont really have an explanation i just got the question right on my quiz

Answer:

by pushing for laws that helped improve working conditions and increase wages. (got it right on usa test prep)

Explanation:

Answer:

D: The Moon's orbit is tilted compared

to Earth's orbit, so Earth is not in the

Moon's shadow most months.

Answer:

Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. Inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

Explanation:

Hope this helps      :)

Answer:

Q = 1.404 × 10^(5) KJ

Explanation:

We are given:

Mass;m = 500 g = 0.5kg

Temperature 1;T1 = 28 °C

Temperature:T2 = 150 °C

Specific heat capacity;c_p = 4183 J/Kg °C

Latent heat of vaporization;L = 2.26 × 10^(6) J/Kg.

The heat energy needed is given by;

Q = sensible heat energy + Latent heat

Formula for sensible heat is;

Sensible heat energy = mc(t2 - t1)

Formula for Latent heat is ;

Latent heat = mL

Thus:

Q = mc(t2 - t1) + mL

Q = m[c(t2 - t1) + L]

Q = 0.5((4183(159 - 28) + (2.26 × 10^(6)))

Q = 1.404 × 10^(8) J = 1.404 × 10^(5) KJ

The amount of helium atoms lined up side to side that  would span the diameter of a human hair is: 1.5625*10^6  atoms

To solve this problem the we have to do the conversion of units with the given information.

Information about the problem:

By converting the units of the helium atom's diameter from nm to mm, we have:

d(helium atom)= 0.064 nm * 1 m/1*10^6 mm

d(helium atom)=  6.4*10^-8 mm

To know how many helium atoms lined up side to side would span the diameter of a human hair, we have to do a division as a following:

amount of helium atoms lined up side to side= d(human hair)/d(helium atom)

amount of helium atoms lined up side to side= 0.1 mm/6.4*10^-8 mm

amount of helium atoms lined up side to side= 0.1 mm/6.4*10^-8 mm

amount of helium atoms lined up side to side= 1.5625*10^6

It is the transformation of a value expressed in one unit of measurement into an equivalent value expressed in another unit of measurement of the same nature.

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