compare the light-gathering power of a 10 m keck telescope with that of a 0.5 m telescope.

Answer:

a) Shadow distance

10 cm in front of the mirror.

b) Zoom in the shadow

The shadow formed is the same height as the object and is placed also at the centre of curvature of the mirror as shown in the attached image to this solution.

c) The nature of the shadow

The shadow formed is real, inverted, same size as the object and formed at the centre of curvature.

Explanation:

English Translation

Objects as high as 3 cm are placed at a distance of 10 cm in front of a concave mirror with 10 cm curvature. Determine:

a) Shadow distance

b) Zoom in the shadow

c) The nature of the shadow

Solution

The mirror equation is given as

(1/f) = (1/v) + (1/u)

f = focal length of the mirror = (radius of curvature)/2 = 10/2 = 5 cm

v = image distance = ?

u = object distance = 10 cm

We can then calculate the shadow' s distance from the mirror thus

(1/5) = (1/v) + (1/10)

(1/v) = 0.2 - 0.1 = 0.1

v = (1/0.1) = 10 cm

b) Zoom in the shadow

Since the object is placed at the centre of curvature, as shown in the attached image, the image is formed at a point of intersection of rays. The image formed is the same height as the object and is placed also at the centre of curvature of the mirror.

c) The nature of the shadow

Since the mirror is a concave mirror, the image is real and formed in front of the mirror. The image is also inverted and formed at the centre of curvature of the mirror.

Hope this Helps!!!

Answer:

100 is the frequency of wave

Explanation:

Answer:

a) true, b) true, c) false

Explanation:

Este ejercicio de cinemática se pide revisar varias afirmaciones

a) Cierta.  La velocidad horizontales consta

b) cierto.  La velocidad vertical disminuye hasta llegar a cero en su altura máxima, la aceleración es negativa

C) False.   Si la velocidad es tangente a la trayectoria el movimiento debe ser circular, pero este movimiento es parabólico

Traduction

This exercise in kinematics asks you to review several statements

a) true. The horizontal speed consists

b) true. The vertical speed decreases until it reaches zero at its maximum height, the acceleration is negative

C) False. If the speed is tangent to the path, the movement must be circular, but this movement is parabolic.

With respect to parabolic motion:

Con respecto al movimiento parabólico:

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Answer:

Yes

Explanation:

When humans use land, they change it to accommodate their own needs, and thus new locations and new habitats for other organisms are created. These organisms can now live there and create new organisms, and thus create new ecosystems as a result of human use of that particular piece of land.

Answer:

D. Registered dietitian

Answer:

D

Explanation:

The correct conductor ampacity for a 10-horsepower, 230-volt, single-phase motor is option c. 62.5 A.

The ampacity of a conductor is a measure of the maximum amount of electrical current that can flow through it safely. The ampacity required for a motor is based on the size of the motor and the voltage of the electrical system. There are standard methods for determining the minimum ampacity for a given motor and voltage, such as the National Electric Code (NEC) and the American National Standards Institute (ANSI). The NEC and ANSI both state that the minimum ampacity for a 10-horsepower, 230-volt, single-phase motor is 62.5 amperes. It's important to note that using a conductor with ampacity lower than the recommended one may cause the motor to overheat and fail, leading to damage or even fire hazard.

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Answer: The crest of one wave overlaps with the trough of another

Explanation:

I took the test and got 100%. This is the correct answer

The best description of the destructive interference of light is the crest of one wave overlaps with the trough of another.

Destructive interference takes place when waves come together in such a manner that they completely cancel each other out or amplitude of the resulting wave decreased.

The highest surface part of a wave is called the crest, and the lowest part is the trough.

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The speed of the first car is 52 mph.

The speed of the second car is 40 mph.

Let's use "x" mph to represent the second car's speed. We can express the first car's speed as "x + 12" mph because it is 12 mph faster. According to our knowledge, the first car travelled 234 miles, while the second car covered 180 miles.

The relationship between speed and distance travelled is inversely proportional. As a result, the proportion of distances covered by the two vehicles will match the proportion of their speeds:

234 / 180 = (x + 12) / x

To solve this equation, we can cross-multiply:

234x = 180(x + 12)

Expanding the equation:

234x = 180x + 2160

Rearranging terms:

234x - 180x = 2160

54x = 2160

Dividing both sides by 54:

x = 40

Therefore, the speed of the second car is 40 mph.

To find the speed of the first car, we can substitute the value of x back into the expression "x + 12":

x + 12 = 40 + 12 = 52

Hence, the speed of the first car is 52 mph.

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Answer:

they provide structure and support, facilitate growth through mitosis, allow passive and active transport, produce energy, create metabolic reactions and aid in reproduction.

Explanation:

they provide six main functions.

The magnitude of the electric field is 1.20 x 10^7 N/C if the magnitude of the electric field if the string with a 7-gram ball carrying a charge of 4x10-9 C. Thus, option b is correct.

The given data is as follows:

Weight of ball = 7-gram

Charge of 4x10-9 C

Angle = 35 degrees

The electric field is described as the force per unit charge in a substance. The electric field  is calculated by using the formula,

E = mg / q * tan(θ)

g is the acceleration due to gravity.

E = (0.007 kg)(9.81 m/s^2) / (4x10^-9 C) * tan(35°)

E = 1.20 x 10^7 N/C

Therefore, the magnitude of the electric field is 1.20 x 10^7 N/C.

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Answer:

what do you mean

Explanation:

Answer:

The correct answer is A. Thermal energy (heat) is defined as the sum of all the kinetic energies of all the particles in an object.

Answer:

juuhu

Explanation:

jjj

The cylinder force when the cylinder is extending is 352 lbs.

To calculate the cylinder force when the cylinder is extending, we can use the formula:

Force = Pressure x Area

Where pressure is measured in pounds per square inch (psi) and area is measured in square inches.

Given that the pressure in the rod end of the cylinder is 158 psi and the pressure in the cap end is 176 psi, we can assume that the cylinder is extending.

We also know that the cylinder rod area is 1 square inch and the piston area is 2 square inches.

Using the formula, we can calculate the force on the cylinder as:

Force = Pressure x Area
Force = 176 psi x 2 sq in (since the cap end has higher pressure and larger area)
Force = 352 lbs

Therefore, the cylinder force when the cylinder is extending is 352 lbs.

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The characteristics of the thermal heating mechanisms allow to find the correct answer for how snow prevents soil heating is:

         b) Snow reflecting solar radiation.

The heating of the system occurs by absorption of energy by three basic mechanisms:

In this case, the snow receives electromagnetism waves from the sun, a large part of these waves are reflected by the snow, therefore they do not reach the ground and cannot be absorbed, thus decreasing its heating.

Let's analyze the claims:

a) False. Greenhouse gases do not interfere with snow on the ground.

b) True. This mechanism reduces radiation heating.

c) False. The heat that comes from the equator warms the air.

d) False. Heating by the Earth's core occurs everywhere and comes from the center of the earth, so it does not interact with snow.

In conclusion, with the characteristics of the thermal heating mechanisms, we can find the correct answer for how snow prevents soil heating is:

         b)  Snow reflecting solar radiation

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The minimum number of 65Ω resistors that must be connected in parallel to produce an equivalent resistance of 11Ω or less is 6.

This can be calculated by dividing the value of one resistor (65Ω) by the desired equivalent resistance (11Ω) to get the maximum number of resistors that can be connected in parallel (5.91). Since the number of resistors in parallel must be a whole number, the minimum number of resistors required is 6. When six 65Ω resistors are connected in parallel, the equivalent resistance is approximately 10.83Ω, which is less than 11Ω.

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Given data

*The given storm cloud has a charge is q = +0.35 C

*The tree gains a charge is Q = -0.02 C

*The distance between them is r = 150 m

*The value of the Coulomb's constant is k = 9 × 10^9 N.m^2/C^2

The formula for the amount of force between the cloud and the tree is given as

Substitute the known values in the above expression as

Here the negative sign indicates that the charges are attractive in nature.

Hence, the amount of force between the cloud and the tree is F = -2.8 × 10^3 N

If the density of matter in the universe turned out to be greater than the critical density, it would imply that the universe is a closed system. This means that the gravitational pull of matter in the universe is strong enough to eventually halt the current expansion and cause the universe to collapse in on itself.

This collapse would lead to the formation of a singularity, similar to the Big Bang, from which a new universe could potentially emerge.

However, current observations suggest that the density of matter in the universe is actually less than the critical density, indicating that the universe is an open system. This means that the current expansion of the universe will continue indefinitely, potentially leading to a "heat death" scenario where all matter is evenly dispersed and the universe reaches a state of maximum entropy.

It is important to note that the actual density of matter in the universe is still a topic of ongoing research and debate, with various methods of measurement producing slightly different results.

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Answer:

read section b :)

Explanation:

To measure the speed of the wave on the string, the wavelength, and frequency are required. So by calculating the wavelength, the speed can be calculated.

The distance between two adjacent crests can be used to calculate a transverse wave's wavelength. The distance between two adjacent compressions can be used to calculate the wavelength of a longitudinal wave.

The wave speed can be determined using this equation if the wavelength and frequency are known. The quantity of waves that move in a wave's frequency is measured in waves per second.

Speed = Wavelength x Frequency).

Therefore, the wavelength and frequency of the wave on the string must be determined in order to calculate its speed. Consequently, the speed can be estimated by determining the wavelength.

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1/Rt = 1/R1 + 1/R2 + 1/R3+ 1/R4+ 1/R5

1/Rt = 1/6+ 1/6+1/6+1/6+1/6

1/Rt = 5/6

Rt = 6/5

Rt = 1.2 ohm

so B is the answer

The difference in time between the sound waves being detected at the other end of the plank and the sound being heard through the air will be 0.09 sec.

A sound wave is produced when a medium begins to vibrate. When an entity vibrates, a pressure wave is formed, which causes sound.

Given data;

The speed of sound in wood,u= 3300 m/s

The speed of sound in air,v=330 m/sec

long plank of wood, L=33 m

The time period in the air was found as;

T₁ = 33 m / 330 m/sec

T₁= 0.1 sec

The time period in wood ;

T₂= 33 m / 3300 m/sec

T₂=0.01 sec

T = T₁ - T₂

T=0.1-0.01

T=0.09 sec

Hence, the difference in time between the sound waves being detected at the other end of the plank and the sound being heard through the air will be 0.09 sec.

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Because ultraviolet light may be absorbed by the filler substance, but not by the lamp's light. Because UV light extracts energy from the filler substance while lamp light does not.

Ultraviolet Rays in the electromagnetic Spectrum Ultraviolet rays are a kind of electromagnetic radiation that extends from the visible light spectrum to the X-ray area.

Harmful rays have a long-term effect on humans, causing skin and eye problems. It is also a source of Vitamin C.

Because ultraviolet light may be absorbed by the filler substance, but not by the lamp's light. Because UV light extracts energy from the filler substance while lamp light does not,

Hence light from the ultraviolet flashlight harden the filling when light from the lamp does not.

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Answer:

u breathe lol nice ok bro

Answer:

An atomic nucleus contains most of the atom’s mass

Explanation:

The first and second answer choices are incorrect because the nucleus has a charge -- but it is positive due to the presence of protons.

The third answer choice is incorrect because the nucleus is extremely dense and packed with all of the protons and neutrons of the atom.

The fourth answer choice is correct because protons and neutrons contain the mass of the atom.

Answer:

An atomic nucleus contains most of the atom’s mass

Explanation:

Hope this helps

Answer:d

Explanation:

Physical property do these two elements most likely have in common They both D.conduct electricity very well

Iron is a metal specifically known as a transition metal. It fits the description of metals, as it is silvery gray, ductile, and malleable.

silicon is known as a chemical analogue to carbon. But unlike carbon, silicon a metalloid

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The answer is E. recombination.

Recombination refers to the process of combining existing ideas or concepts in new and unique ways to create complex ideas.

This process involves taking previously learned information and combining it with other information to form new insights or perspectives. By recombining ideas, individuals are able to develop more complex thoughts and ideas that are not limited to their existing knowledge base.

This process is critical for creativity and problem-solving, as it allows individuals to approach challenges from different angles and generate innovative solutions. Additionally, recombination can lead to the development of new fields or areas of study, as individuals combine existing concepts to create entirely new disciplines.

Overall, the process of recombination plays a fundamental role in human cognition, allowing individuals to generate complex and novel ideas that can shape the course of history.

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Answer:

An filtration is the answer.

a) y(t) = te⁻³ᵗ is a possible position function.

b) General equation: y(t) = C₁e^(-2t) + C₂e^(-3t) + t(e^(-3t))(At + B).

c) Exact motion equation: y(t) = (23/5)e^(-2t) - (8/5)e^(-3t) + t(e^(-3t))(At + B), with initial conditions y(0) = 3 and v(0) = -7.

a) To show that y(t) = te⁻³ᵗ is a possible position function, we substitute it into the differential equation:

y(t) = te⁻³ᵗ

y'(t) = e⁻³ᵗ - 3te⁻³ᵗ

y''(t) = -6e⁻³ᵗ + 9te⁻³ᵗ

Substituting these expressions into the differential equation, we have:

-6e⁻³ᵗ + 9te⁻³ᵗ + 7(e⁻³ᵗ - 3te⁻³ᵗ) + 6(te⁻³ᵗ) = -6te⁻³ᵗ - e³ᵗ

Simplifying this equation, we find that both sides are equal, thus confirming that y(t) = te⁻³ᵗ is a possible position function.

b) The general equation for all possible position functions can be written as:

y(t) = C₁e^(-2t) + C₂e^(-3t) + t(e^(-3t))(At + B)

c) Given the initial conditions y(0) = 3 and y'(0) = v(0) = -7, we substitute these values into the general equation and solve for the constants:

3 = C₁ + C₂

-7 = -2C₁ - 3C₂

Solving these equations, we find C₁ = 23/5 and C₂ = -8/5.

The exact motion equation for the weight is:

y(t) = (23/5)e⁻²ᵗ - (8/5)e⁻³ᵗ + t(e⁻³ᵗ)(At + B)

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Suppose a weight of 1 kg is attached to an oscillating spring with friction constant b = 7 and stiffness constant k = 6. Suppose the external forces on the weight are: Fₑₓₜ(t) = - 6te⁻³ᵗ - e³ᵗ

y" + 7y' + 6y = - 6te⁻³ᵗ - e³ᵗ

a) Show y(t) = te⁻³ᵗ is a possible position function for this weight.

b) Find a general equation for all possible position functions.

c) Find the exact motion equation for this weight if its initial position is y(0) = 3, and its initial velocity is v(0) = y'(0) = -7.

50. seconds po

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