To determine how far Martha must move the eyepiece in order to focus on the bird, we can use the lens formula.
To focus on the bird, Martha needs to adjust the eyepiece by a distance that brings the final image distance (v) to 50 m. The exact calculation for the movement of the eyepiece will depend on the specific values of u and the corresponding value of v.To determine the distance by which Martha must move the eyepiece in order to focus on the bird, we need to calculate the change in the position of the eyepiece.The change in the position of the eyepiece can be found by subtracting the initial position of the eyepiece from the final position.
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How might a servant leaders gender, age, or ethnicity influence how he or she is perceived by followers?
Answer:
Servant leaders use persuasion – rather than their authority – to encourage people to take action. They also aim to build consensus in groups , so that everyone supports decisions. There are many tools and models that you can use to be more persuasive, without damaging relationships or taking advantage of others.
Explanation:
Which type of relationship is formed when a megabat eats a fig and drops the
fig tree's seeds in a new location?
1) commensal
2) mutualistic
3) parasitic
The type of relationship formed when a megabat eats a fig and drops the seeds in a new location is COMENSALISM. It is an ecological interaction.
What is commensalism?Commensalism is a type of ecological interaction in which one organism benefits (in this case, the tree) and the other organism neither benefits nor harm (the megabat).
Mutualism is a type of ecological association in which both organisms benefit from such interaction.
Conversely, parasitism is a type of ecological interaction in which one organism benefits and the other organism is harmed.
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A bird flies 200 km in 4.5 hours. What is the birds average speed?
900 km/hr
0.0225 km/hr
44.44 km/hr
245 km/hr
Consider a double Atwood machine constructed as follows: A mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. The other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. Using two suitable generalized coordinates, set up the Lagrangian and use the Lagrange equations to find the acceleration of the mass 4m when the system is released. Explain why the top pulley rotates even though it carries equal weights on each side.
A spring is hung vertically from a hook. A 500g mass is hung from the spring and the spring stretches 0.01m from equilibrium. If the mass is then pulled 0.02m MORE and released what will be the acceleration of the mass just as it is released? (show work)
Answer:
See the explanation below.
Explanation:
By means of Hooke's second law, we can calculate the spring constant with the initial conditions of the problem.
\(F=k*x\)
where:
k = spring constant [N/m]
x = distance = 0.01 [m]
F = force or weight [N]
Weight can be calculated by means of the product of mass by gravitational acceleration.
m = mass = 500[g] = 0.5[kg]
\(W=F=m*g\\W = 0.5*9.81\\W= 4.905[N]\)
Now the spring constant can be calculated:
\(k=F/x\\k=4.905/0.01\\k = 490.5[N/m]\)
We must now use the same Hooke's law to determine the new spring force when stretching it 0.03 [m]
\(F_{new}=k*x\\F_{new}=490.5*0.03\\F_{new}=14.715[N]\)
Now we have to use Newton's second law to calculate acceleration. We must remember that Newton's Second Law tells us that the sum of forces is equal to the product of mass by acceleration.
\(F=m*a\)
where:
F = Fnew = 14.715[N]
m = mass = 500 [g] = 0.5 [kg]
a = acceleration [m/s²]
Now replacing:
\(14.715=0.5*a\\a=14.715/0.5\\a=29.43[m/s^{2} ]\)
Where do human get the stuff they need to survive?
Answer:
Humans survive through gaining nutrients by eating
Answer:
We must have food, water, air, and shelter to survive. If any one of these basic needs is not met, then humans cannot survive. Oxygen is one of the most essential human needs. Our bodies need a consistent supply of it to function properly. Without access to oxygen, you can experience a condition known as cerebral hypoxia, which affects the brain. As little as five minutes without air can result in brain damage. We get food from plants and animals, we get water from rivers and streams, and we get shelter from building anything that is around.
Explanation:
Alisa needs to make some hot tea for her ill mother. She uses some ice-cold water from the freezer and heats it up in the kettle. As she hears the teapot whistling, she asks herself, “How is the motion of the ice water’s particles changing as the hot tea is being made?”
What is the best answer to Alisa’s question?
Answer choices
A. The particles in the cold water moved at a slow rate until a decrease in temperature caused an increase in particle motion in the hot tea.
B. The particles in the cold water moved at the same rate until an increase in temperature caused a decrease in particle motion in the hot tea.
C. The particles in the cold water moved at a high rate until an increase in temperature caused a decrease in particle motion in the hot tea.
D. The particles in the cold water moved at a slow rate until an increase in temperature caused an increase in particle motion in the hot tea.
:)
Answer:
the answer is b
Explanation:
The particles in the cold water moved at a slow rate until an increase in temperature caused an increase in particle motion in the hot tea.
According to the kinetic theory of matter, the particles that compose matter are in constant random motion. The particles collide frequently with each other as well as with the walls of the container.
The temperature of the system refers to the average kinetic energy of the molecules of the body. At a lower temperature, the speed of the particles of water is slow. As the temperature increases, more kinetic energy is imparted to the molecules of water and they move faster.
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Which is the best way to compare speed and velocity?
A. Slowing down versus speeding up
B. Distance over time vs distance over time and direction
C. Big vs small
D. One is the hunter and one is the prey
Please help as soon ASAP!
the girl has a weight of 72N on moon.what will be the mass and the weight of the girl on earth.(use g earth=10m/s 2/g 9 moon=1.6m/s 2)
Answer:
F(m)= mg(m)
m=F(m)/g(m)=72/1.6=45kg
F(e)= mg(e)= 45 x 10 m/s= 450N
what is tue cause of upthrust ?
it's caused by a pressure that is large on the button of an object that it is on the top of an object submerged in a liquid.
Explanation:
This is why object appear to weigh less when immersed in a liquid. If the upthrust is greater than the weight of the object, the object will rise up through the liquid.
Select the correct symbol and units for wavelength. Select all that apply.
nm
λ
The correct symbol and unit for wavelength is, nm (nanometers) for lambda. The correct answer is A.
Wavelength is a physical quantity that describes the distance between two consecutive points in a wave that are in phase (i.e., have the same displacement and velocity). It is commonly denoted by the Greek letter lambda (λ) and its SI unit is the meter (m). However, due to the small size of electromagnetic waves (such as light), wavelengths are often expressed in nanometers (nm) or micrometers (μm).
The symbol and unit for speed is,
m/s (meters per second) for v.
The symbol and unit for resistance is,
ohm (Ω) for R.
So "m/s v" and "ohm R" are not correct for wavelength. Hence option A is correct.
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--The complete question is, Select the correct symbol and units for wavelength. Select all that apply.
nm λ
m/s v
ohm R--
If u is the distance between the object and the optical centre of the lens, v is the distance between the image and the optical centre of the lens and f is the focal length of the lens; then what is the relationship among u,v and f ?
Explanation:
The relationship among u, v, and f in the context of a lens can be described by the lens formula:
1/v - 1/u = 1/f
where:
- u is the object distance (distance between the object and the optical center of the lens),
- v is the image distance (distance between the image and the optical center of the lens), and
- f is the focal length of the lens.
According to the lens formula, the reciprocal of the image distance subtracted from the reciprocal of the object distance is equal to the reciprocal of the focal length.
on the celestial sphere, which of the following terms are specific to the observer (that is, they are unique for unique observers)? (choose all that apply.) select one or more: a. celestial equator b. north celestial pole c. nadir d. meridian e. horizon f. zenith g. ecliptic
The terms specific to the observer are e, f, and g. The ecliptic is the path that the Sun appears to follow across the sky throughout the year as viewed from Earth.
The horizon is an imaginary line that marks the point where the sky and the Earth's surface seem to meet. The zenith is an imaginary point directly overhead from the observer's location.
The celestial equator is an imaginary line that runs around the celestial sphere, dividing it into two hemispheres. The north celestial pole is the point directly above the observer's north horizon. The nadir is an imaginary point directly below the observer's location.
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What are 3 facts about electromagnets?.
Magnetic objects are either drawn to or pushed away by magnetism. When two magnets with the same poles are positioned close to one another, they push apart and repel. When two dissimilar poles are positioned close to one another, they pull and attract to one another.
What three qualities do electromagnets possess?A soft iron core makes up an electromagnet. You may alter the magnetic field's strength. Simply cutting off the electricity will demagnetize an electromagnet. Reversing the polarity is possible.
A unique class of magnets called electromagnets has the following characteristics: By switching the direction of the current flow, the polarity of the magnets may be changed. They function as magnets when an electric current is passing through them; they are transient magnets that may be turned on and off.
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PLEASE HELP!!!!!
When current flows through this wire, what forms around the wire?
A. Electromagnetism
B. An electric field
C. An attraction between charged particles
D. A magnetic field
ONLY REPLY IF YOU KNOW THE ANSWER TO IT
Answer:The answer is A
Explanation:
Answer:
A. Electromagnetism
Explanation:
Whenever current travels through a conductor (the wire) a magnetic field is generated. Due to being a wire, the current formed is electric, so this making it an electromagnetic field.
What is the reason for a stone sink in the water but a plastic floats?
Select one:
A.
The density of plastic is greater than stone
B.
Mass of the stone is greater than mass of plastics.
C.
The density of plastic is greater than water.
D.
The density of stone is greater than water.
how can you reduce output voltage to 6v in transformers if the input voltage is 240v
Answer:
\(N_P = 40\ N_S\)
To reduce the output voltage to 6v in transformers if the input voltage is 240v, we need to have 40 times as many turns in the primary coil as there are in the secondary coil.
Explanation:
The change in voltage of a transformer depends upon the turns ratio of the transformer between secondary and primary coil. Following formula can be used to determine the turns ratio in this case:
\(\frac{N_P}{N_S} = \frac{V_P}{V_S} \\\\\)
where,
\(N_P\) = No. of turns in the primary coil
\(N_S\) = No. of turns in the secondary coil
\(V_P\) = voltage in the primary coil = 240 V
\(V_S\) = voltage in the secondary coil = 6 V
Therefore,
\(\frac{N_P}{N_S} = \frac{240\ V}{6\ V} \\\\N_P = 40\ N_S\)
To reduce the output voltage to 6v in transformers if the input voltage is 240v, we need to have 40 times as many turns in the primary coil as there are in the secondary coil.
A solid sphere of radius A has a uniform charge density per unit volume rho and a total charge Q. Express the result for E(r) for 0 ≤ r ≤ a in terms of Q and a instead of rho, and make a sketch of E(r) showing its behavior over both the ranges 0 ≤ r ≤ a and r ≥ a. (b) Place a particle with charge +q0 at a distance r1 > a from the center of the sphere. What is the work W1 done by the Coulomb force on the particle as the particle moves from r=r1 tor=[infinity]? (c)(Numeric)IfQ=1μC,q0 =10nC,a=0.05m,andr1 =0.2m,computeW1 basedon your result to part (b). [Ans. W1 = 4.5 × 10−4 Joules.] (d) Using the expression for change in potential energy ∆U = −W, and the convention that U(+[infinity]) = 0, obtain the expression U(r) for the potential energy of the charge q0 as a function of the distance r from the center of the sphere, for r ≥ a. (e) Recalling the definition of the electric potential V , write down the expression for V (r) due to the sphere for r ≥ a. (f) (Numeric). Using the same numerical values given in part (c), calculate the electric potential V (r = a) due to the sphere at the surface of the sphere. [Ans. V (r = a) = 1.8×105 Volts.] (g) Now, supposing the charge q0 starts from a position r2 < a, compute the work W2 done by the electric field inside the sphere in moving the charge q0 from r = r2 to the edge of the sphere at r = a. (h) (numeric) If r2 = 0.03 m, compute W2 using the other numerical values from part (b). [Ans: W2 = 5.8 × 10−4 Joules.] (i) Again, using the expression for change in potential energy ∆U = −W , and the convention that U(+[infinity]) = 0, obtain the expression U(r) for the potential energy of the charge q0 as a function of the distance r from the center of the sphere, for r ≤ a. Write down the corresponding expression for V (r) in this same range. Is the electric potential higher inside the sphere than outside? (j) Using the numerical values we’ve been using, make computer generated plots of V (r) overtheranges0≤r≤aanda≤r≤5a. LookattheshapeofV(r)asr→0. Isit consistent with the electric field being zero at t
The expression for electric field E(r) for 0 ≤ r ≤ a in terms of Q and a isE(r) = (Q / 4πε0r3) (3a2 − r2). The graph of E(r) is shown below, showing that the electric field is maximum at r = 0 and decreases to zero as r approaches a, and that the electric field is zero at r = a and increases as r increases beyond a.
The work W1 done by the Coulomb force on the particle as the particle moves from r = r1 to r = ∞ is given by the expression W1 = q0[Q/a − Q/r1].For Q = 1 μC, q0 = 10 nC, a = 0.05 m, and r1 = 0.2 m,W1 = 4.5 × 10−4 Joules.
The potential energy U(r) of the charge q0 as a function of the distance r from the center of the sphere, for r ≥ a is given by the expression U(r) = (q0Q / 4πε0r) − (q0Qa / 4πε0r3) (2r2 − 3a2).
The expression for electric potential V(r) due to the sphere for r ≥ a is given byV(r) = (Q / 4πε0r) − (Qa / 4πε0r3) (2r2 − 3a2).
Using the numerical values given, the electric potential V(r = a) due to the sphere at the surface of the sphere isV(r = a) = 1.8 × 105 Volts.
The work W2 done by the electric field inside the sphere in moving the charge q0 from r = r2 to the edge of the sphere at r = a is given by the expressionW2 = (q0Q / 6πε0a3) (a2 − r2) (3r2 + 2a2).For r2 = 0.03 m, W2 = 5.8 × 10−4 Joules.
The potential energy U(r) of the charge q0 as a function of the distance r from the center of the sphere, for r ≤ a is given by the expression U(r) = (q0Q / 4πε0a) [(3/2) − (r2 / a2)].
The expression for electric potential V(r) due to the sphere for r ≤ a is given byV(r) = (Q / 4πε0a) [(3/2) − (r2 / a2)].
The electric potential is higher outside the sphere than inside the sphere, because the potential is zero inside the sphere, whereas it is nonzero outside the sphere.
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What are two adaptations that telescope must make to account for
different types of light?
Answer: Reflecting telescopes focus light with a series of mirrors, while refracting telescopes use lenses.
Explanation:
For an object to appear red, what must happen?
A. It must refract red light waves.
B. It must diffract red light waves.
C. It must reflect red light wavel
D. It must shift red light waves.
Answer:
C. It must reflect red light wavelExplanation:
The color of the object is reflected by the object other colors are absorbed by the object.
Here object appears in red color so red color is reflected by the object and other colors are absorbed.
calculate the frequency of a wave using an equation
Answer:
1. f=1T. where: f is the frequency of the wave in hertz. T is the period of the wave in seconds.
2. f=vλ where: f is the frequency of the wave in hertz. v is the velocity of the wave in meters per second. λ is the wavelength of the wave in meters
3. f=cλ
Explanation:
you are in the middle of a large field. you walk in a straight line for 100 m, then turn left and walk 100 m more in a straight line before stopping. when you stop, you are 100 m from your starting point. by how many degress did you tur
The correct answer is E) This is impossible. You cannot walk 200m and be only 100m away from where you started. To determine the number of degrees you turned, we can use basic geometry.
You started in the middle of a field and walked 100m in a straight line. This forms a right triangle, where one side is the distance you walked (100m) and the other side is the distance from the starting point to the final position (100m).
Since the triangle is a right triangle, we can use the Pythagorean theorem to find the length of the hypotenuse, which represents the distance you are from the starting point.
Using the Pythagorean theorem:
\(c^2 = a^2 + b^2\)
\(c^2 = 100^2 + 100^2\)
\(c^2 = 20000\)
c = √20000
c ≈ 141.42 m
From this, we can see that the distance from the starting point is approximately 141.42m, not 100m. Therefore, the given situation is impossible.
The correct answer is E) This is impossible. You cannot walk 200m and be only 100m away from where you started.
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Full Question ;
You are in the middle of a large field. You walk in a straight line for 100m, then turn left and walk 100m more in start line before stopping. When you stop, you are 100m from the starting point.By how many degrees did you turn?
A) 90
B) 120
C) 30
D) 180
E) This is impossible. You cannot walk 200m and be the only 100m away from where you started.
A transmitter produces radio waves of wavelength 1500m. It takes the waves 0.025s to travel from transmitter to radio receiver.
What is the distance between the radio transmitter and the receiver?
A) 5 × 10³ m
B) 2 × 10⁵ m
C) 7.5 × 10⁶ m
D) 1.1 × 10¹⁰ m
Answer:
\(7.5 \times 10 {}^{6} \)
Explanation:
Speed of electromagnetic waves=
\(3 \times 10 {}^{8} ms\)
m/s
\( = 3 \times 10 {}^{8} ms \times 0.025\)
\( = 3 \times 10 {}^{8} \times \frac{1}{40} \)
\( = 7.5 \times 10 {}^{6} m\)
Please Help Fast Select the correct answer. Which equation correctly relates kinetic energy, mass, and velocity? A. B. C. D.
Answer:
KE = 1/2 m v^2
Explanation:
The development of fusion energy has not been successful so far because of the high temperatures needed for fusion to occur. It’s not clear when we will have the technology to accomplish this. Do you think the government should continue to fund fusion research? Give your reasons.
Government should continue to fund fusion energy research because:
it potentially will produce large amounts of energyscientific research could discover more feasible methods of fusion energy productionit is a very clean form of energyWhat is fusion energy?Fusion energy is the energy produced from fusion reactions.
Fusion reactions are a type of nuclear reaction in which small atomic nucleus are fused together to produce larger atomic nucleus with the release of large amounts of energy.
The Sun produces its energy from fusion reactions between hydrogen atoms to produce helium nucleus. This reaction takes place at very high temperatures.
It is important that the government continue to fund fusion energy research because:
it potentially will produce large amounts of energymore scientific research could discover alternative cheaper methods of fusion it is a very clean form of energyIn conclusion, the continuous government funding will make it possible to finally discover cheaper and more feasible ways to produce fusion energy.
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In which direction does the electric field point at a position directly east of a
positive charge?
• A. West
• B. South
•C. North
• D. East
Anser- EAST AP-EX
Answer:
D. East That's my correct answerHuman resource professionals are reviewing the needs of a company that is
building a new factory. The company needs people who can weld electronic
elements together, test them, and package them securely. The HR
professionals conclude that four kinds of workers could complete this
process. Their work is the HR function of
A. employee retention
B. recruitment
C. selection
D. job design
One characteristic of an SBU classified as a star is...
a) a large share of a low-growth market
b) a large amount of short-run cash support
c) a very small amount of money for growth and expansion
d) probable divestiture by the corporation
e) the potential to achieve a large market share
.Answer: The potential to achieve a large market share is one characteristic of an SBU classified as a star.
One characteristic of an SBU classified as a star is the potential to achieve a large market share. SBU (Strategic Business Unit) is a self-contained entity that operates as a distinct business division of an organization. An SBU has its own mission, objectives, and plans that are unique to that unit and distinct from other units of the same organization.
SBU classification according to the Boston Consulting Group (BCG) Matrix. Based on the BCG matrix, SBUs are classified into four categories: Question mark, Dog, Cash cow, and Star.
SBUs classified as a star have the potential to achieve a large market share because they operate in high-growth markets and have a high relative market share. Stars have high revenue and high growth potential, but they also require substantial investment to maintain or grow market share.
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A block with a mass of 55 kg is pulled with a force of 220 N. Assuming a frictionless surface, what will be the acceleration of the block?
OA
0.25 m/s2
о
B
4.0 m/s2
O.
9.8 m/s2
Oo. 22 m/s2
2022 huminate Education
PLS HELP HELO ME!!!
Answer:
B) 4 m/s²
Explanation:
Since the surface it's kept on is frictionless, the net external force acting on the block will be 220 N.Mass of the block = 55 kg\( \boxed{ \sf{ F= m \times a}}\)
Here,
F is the net external force applied to an object,m is the mass of that object, anda is the acceleration it acquires.Substituting the respective values for F and m:
==> 220 = 55 × a
==> 220 = 55 × a
dividing the equation by 55:
==> 4 = a
Therefore, an object of 55 kg when pulled across a frictionless surface by a force of 220 N accelerates at 4 (m/s)/s
what is coulomb law explain it
Coulomb law depicts the mathematical relationship between the electric force and the charged objects.
What is Coulomb law?This law states that the electric force is directly proportional to the product of the charged objects.
The electric force is also inversely proportional to the square of the distance between the charges and is denoted below:
F= kq1q2/ r²
where :
F=electric force
k=Coulomb constant
q1, q2=charges
r=distance of separation
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