_________________ was the first astronomer to make telescopic observations which demonstrated that the ancient Greek geocentric model was false.

Rounding off to two significant figures, the focal length of the lens is: f = 0.36 cm. Therefore, the answer is: f = 0.36 cm.

To determine the focal length of a lens based on its optical power, you can use the following formula:

focal length (in meters) = 1 / optical power (in diopters)

Given that the optical power is +2.8 diopters, we can substitute this value into the formula:

The focal length of the lens can be calculated using the formula:
f = 1 / P
where P is the optical power in diopters.
Substituting the given value of P = +2.8 diopters, we get:
f = 1 / (+2.8) = 0.357 cm
Rounding off to two significant figures, the focal length of the lens is:
f = 0.36 cm
Therefore, the answer is: f = 0.36 cm.

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The correct sentence would be: "After finishing dinner, Kim cleared the table, and Mark washed the dishes."

The original sentence contains a misplaced modifier. To correct this, the sentence should be rewritten to indicate who performed each action.

This above version correctly indicates that Kim cleared the table and Mark washed the dishes. The original sentence suggests that the table cleared itself, which is a grammatical error. Additionally, the sentence should use past tense to indicate that the actions have already occurred.

By using "was cleared" and "washed," the original sentence is using a combination of past and present tense, which is also a grammatical error.

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The primary indicator of an object's position and speed is its velocity.It is the distance that an object travels in one unit of time.The displacement of the item in one unit of time is the definition of velocity.

Smax = 400 feet.

c) v = 32 ft/s

c) v = - 32 ft/s

(a)

The following is the function provided for ball height:

s = 160 t - 16 t²

Therefore, we must take the derivative with respect to t and make it equal to zero in order to get the time to reach maximum height (in-flexion point):

So, 160 - 32 t = 0, 32 t = 160 t, and 160/32 t = 5 sec.

As a result, the maximum distance is covered every 5 seconds.

Smax = (160)(5) - (16)(5)²

Smax = 800 - 400

Smax=400 feet

b)First, we determine the speed at which the ball travels 384 feet.

384 = 160 t - 16 t

16 t² - 160 t + 384 = 0

Quadratic Equation Solving:

Either:

t = 6 sec

or t = 4 seconds

Since it takes 5 seconds to reach the highest point,

t then equals 5 seconds.

t then equals 4 seconds.

Now, by taking a derivative of ods with respect to t at 4 sec, we can find velocity:

v = 160 - 32 t

v = 160 - (32)(4)

v = 32 ft/s

c,Because t = 6 s > 5 s

The second number of t = 6 sec must represent the point in the ball's downward motion when it is 384 feet above the earth.

So, at that moment, velocity will be:

v = 160 - (32)(6)

v = -32 ft/s

downward motion is a bad sign.

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The true azimuth of the AB alignment is 91º 52' (east of north), the magnetic azimuth is 100º 22' (east of north), and the grid azimuth is 108º 52' (east of north).

To find the true azimuth, magnetic azimuth, and grid azimuth of the AB alignment, we need to consider the magnetic declination. The magnetic declination indicates the angle between true north and magnetic north at a specific location. In this case, the magnetic declination is 8º 30' E, which means that the magnetic north is 8º 30' east of the true north.

To calculate the true azimuth, we subtract the magnetic declination from the grid azimuth. The grid azimuth is given as 100º 22', so subtracting the magnetic declination of 8º 30' E gives us a true azimuth of 91º 52' (east of north).

The magnetic azimuth remains the same as the grid azimuth, which is 100º 22' (east of north).

The grid azimuth is calculated by adding the magnetic declination to the true azimuth. Since the magnetic declination is east, we add it to the true azimuth. Adding 8º 30' E to the true azimuth of 91º 52' gives us a grid azimuth of 108º 52' (east of north).

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Polaroid materials were invented in 1929 by Edwin H. Land, an American scientist and entrepreneur.

He discovered that synthetic polarizers could be produced by aligning microscopic crystals of herapathite, a mineral that exhibits polarizing properties, in a polymer matrix. This breakthrough led to the development of the first polarizing filter, which could block one of the two planes of light oscillation and transmit only light that vibrated in the same direction as the filter. The resulting effect was a clear and sharp image, free from glare and reflection.

Land founded the Polaroid Corporation in 1937 to manufacture and distribute his invention, which soon became a popular consumer product for photography and sunglasses. Polaroid technology also found applications in the fields of optics, electronics, and biology, paving the way for advancements in LCD screens, 3D movies, and scientific research. Polaroid materials were invented in 1929 by Edwin H. Land, an American scientist and entrepreneur.

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The box accelerates down the incline at 2.4m/s^2.

A mass m particle will slide down a smooth inclined plane if it is released onto it with a friction force F=0. We resolve in the direction of motion to determine the particle's acceleration as it slides. F = ma, mg cos(90) = ma, gg cos(90) = a, gg sin() = a.

By using zigmaFx = max, we will determine the acceleration.

However, we must first determine the friction force Ff.

Because cos 30 degree = 0.866 and Fy = ma y = 0 result in FN - 0.87mg = 0, we may calculate FN as (0.87)(20Kg)(9.81 m/s2) = 171N.

From Ff = mue FN = 0.30)(171 N)= 51N, we can now calculate Ff.

We get Ff - 0.50mg = ma x 51N - (0.50)(20)(9.81)N = (20kg)(ax) from the expression zigmaFx = max, where ax = -2.35 m/s2.

At 2.4 m/s2, the box quickens its descent of the hill.

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The statement "most cranial nerves carry both sensory and motor innervation" is true

As most of the cranial nerves carry both sensory and motor innervation.

Sensory fibers carry the sensations of sight, sound, and smell from various parts of the body to the brain, while motor fibers stimulate or control the muscles of the body and glands. The cranial nerves are a set of 12 nerves that arise from the brainstem and control the various functions of the head, neck, and internal organs.

The nerves are numbered I through XII, and each nerve is responsible for a particular function or group of functions in the body. They are responsible for sensory and motor innervation for various parts of the head and neck, as well as some visceral organs in the body.

The motor and sensory functions of cranial nerves are intermingled, so that most of the nerves carry both sensory and motor fibers.

For example, the trigeminal nerve is responsible for both facial sensation and the control of the muscles of the face, while the glossopharyngeal nerve is responsible for both taste sensation and the control of the muscles of the tongue. In conclusion, the statement "most cranial nerves carry both sensory and motor innervation" is true.

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Answer:

15

Explanation:

muntiply the 5.0.3.0 ,you will get ans

Explanation:

she human activity for

If Jupiter were scaled to the size of a basketball, Earth would be the closest to the size of a pinhead. The right option is D).

Given that Jupiter was scaled to the size of a basketball.

Therefore the size of Earth with respect to Jupiter can be determined by the below calculations:Radius of Jupiter = 43,441 milesRadius of a basketball = 4.7 inches

Therefore, scaling down the size of Jupiter by dividing the radius of Jupiter by the radius of a basketball, the size of Jupiter would be;Size of Jupiter = 43,441 miles/4.7 inchesSize of Jupiter = 9,233 basketballs

For Earth, the size of the Earth can be calculated with respect to the size of Jupiter as shown;

Size of Jupiter = 9,233 basketballs

Radius of Earth = 3,959 miles

Diameter of Earth = 7,918 miles

Diameter of a basketball = 9.55 inches

Therefore, the size of Earth with respect to the size of Jupiter can be calculated as shown below;

Earth's diameter in basketballs = 7,918 miles/9.55 inches = 832.3 basketballs

Since there are 9,233 basketballs in Jupiter, then the size of Earth is 832.3 basketballs in proportion to the size of Jupiter.

If Jupiter were scaled to the size of a basketball, Earth would be the closest to the size of a pinhead. The right option is D).

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Despite your prediction, you only received a score of 70% on your test.

To find out what someone knows or has learned, a test is used to assess that person's understanding of the subject. It gauges the degree of expertise or learning that has been attained.

During testing, weaknesses will be found and reduced, and the system's overall quality will improve. As everyone can make a mistake, testing is essential since it enables us to spot faults or issues early on, allowing us to remedy them first before application is sent to the client.

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Answer:

Because in series, current flow through a single path only as it is same. Hence,if one fails the entire circuit breaks and other bulbs are switched off.

Explanation:

Answer:

0.16239316239316239316239

Explanation:

ang haba nang solve ko dito hehe

Answer:

3586

Explanation:

by using formula s=it+0.5at^2

Answer:

\(\fbox {Velocity = 60 m/s, Distance = 3600 m}\)

Explanation:

Part (i) : Velocity at end of 2 minutes

Equation used ⇒ \(\boxed {v = u + at}\)

⇒ t = 2 minutes = 2 x 60 = 120 seconds

⇒ v = 0 + (0.5)(120)

⇒ v = 60 m/s

Part (ii) : Distance covered

Equation used ⇒ \(\boxed {S = \frac{v^{2}-u^{2}}{2a}}\)

⇒ S = (60)² - (0)² / 2(0.5)

⇒ S = 3600 m

Answer:

F = 0

Explanation:

In the given figure, the following forces are acting in it :

1. Gravitational force = 3 N

2. Normal force = 3 N

3. Frictional force = 5 N

4. Applied force is 5 N

We need to find the net force acting on the object. Net force is the sum of all the forces acting on it.

Here, the forces in vertical direction cancel out each other and similarly the forces in horizontal direction cancel out each other as the magnitude of forces is same.  Hence, net force is equal to 0.

The radius of the cylindrical barrel is 0.78 m.

The circular area of the cylindrical barrel is calculated as follows;

P = F/A

A = F/P

where;

A = mg/P

A = (50 x 9.8) / (260)

A = 1.885 m²

A = πr²

r² = A/π

r = √(A/π)

r = √(1.885/π)

r = 0.78 m

Thus, the radius of the cylindrical barrel is 0.78 m.

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\(\qquad\qquad \huge \bf༆ Answer ༄\)

➙ The Correct choice is A

⧠ when two glass marbles bounce off each other, they regain their respective position after collision, since the Loss of energy is minimum, it can be considered as an elastic collision.

Answer:

Explanation:

The question asks "What situations..." and to "Select all the correct answers."

In addition to "two marbles bounce off each other", "a bowling ball knocks over five pins" is another correct answer. The collision between ball and pins is elastic because they are both hard.

Answer:

Since air resistance actually stops vehicles and goes in a vector opposite to the direction of the vehicle and slows it down. Vehicles would want to make vehicles aerodynamic. Many cars bump into air molecules therefore making air resistance. Aerodynamic cars will lesser the allowance of bumping into said molecules. Thats why cars like to cut down on air resistance

Air resistance is friction.  

-- Friction steals kinetic energy.

-- A car gets kinetic energy by burning gasoline, and uses the kinetic energy to get where it needs to go.  

-- If anything steals the car's kinetic energy, then the car has to burn more gasoline to get where it needs to go.

-- Gasoline costs money.

-- Anything that steals a car's kinetic energy costs you more money to operate the car.

(Another thing that takes kinetic energy away from the car is the car's brakes. The driver uses the brakes when he WANTS to slow down or stop, so it's not stealing, but it still costs kinetic energy and money.)

Answer:

The center of gravity is the average location of the weight of an object

Explanation:

Answer:

2.00

Explanation:

Answersdff:

Explanation:

Answer:

balance, eyes, elbow in, follow-through

Explanation:

Answer:

gjsgjdcjpdcojdcoj gud gud gud gud gud gud gud gud gud gud gud gud gud gud get home h hum h hum hth hai h h g c b c b v g c h x corolla

The average speed of the car over this time period is 38.6 miles per hour. The average velocity of the car over this time period is 0 miles per hour.

The average speed of an object is the total distance traveled divided by the total time taken to travel that distance. In this case, the car travels a total distance of 134.2 miles in a total time of 3.991 + 4.109 = 8.1 hours. This means that the car's average speed is 134.2 miles / 8.1 hours = 38.6 miles per hour.

The average velocity of an object is the total displacement of the object divided by the total time taken to make that displacement. In this case, the car returns to its starting point, so its displacement is 0 miles. This means that the car's average velocity is 0 miles / 8.1 hours = 0 miles per hour.

Average speed and average velocity are not the same thing. Average speed only takes into account the distance traveled, while average velocity takes into account the displacement of the object. In this case, the car's displacement is 0, so its average velocity is 0.

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The smaller child is sitting 2.04 m from the pivot point in order to maintain the balance.

To balance the seesaw, the torque exerted by the two children on either side of the pivot point must be equal. The torque exerted by each child can be calculated using the equation:

τ = F * d

where "τ" is the torque, "F" is the force exerted by the child (equal to their weight), and "d" is the distance from the pivot point to the child.

Let's call the distance from the pivot point to the smaller child "x". Then, the torque exerted by the smaller child is:

τ1 = (24.0 kg) * 9.8 m/s^2 * x Nm

The torque exerted by the larger child is:

τ2 = (34.0 kg) * 9.8 m/s^2 * (3.10 m - x) Nm

Since the seesaw is in balance, the torques must be equal:

τ1 = τ2

(24.0 kg) * 9.8 m/s^2 * x = (34.0 kg) * 9.8 m/s^2 * (3.10 m - x)

24.0 * 9.8 * x = 34.0 * 9.8 * (3.10 - x)

Solving for x, we find:

x = (24.0 * 3.10) / (24.0 + 34.0) = 2.04 m

So, the smaller child is sitting 2.04 m from the pivot point in order to maintain the balance.

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(a) The electric field inside the sphere is given by:

E = ρ_E(r) / 3ε₀r

E = (3Q/(4πr₀³)) * (r/r₀) / 3ε₀r

E = Q/4πε₀r₀0³

(b)The electric field at every point inside the sphere is directed radially inwards.

(a)The electric field generated by a charge is given by:

E=kQ/r²

Here,k is Coulomb's constant = 9 × 10⁹ Nm²/C²

From Gauss’s law,

Qenc = ε₀E×4πr²

Where ε₀ is the permittivity of free space=8.85×10⁻¹² C²/Nm².

For a uniform spherical charge distribution of radius R, Charge density can be given as :

ρ = Q/V = Q/(4/3πr³)

Q = ρ×4/3πr³

Electric Field at a distance r from the center will be given by:

E = 1/4πε₀ x Q/r²

E = 1/4πε₀ x (ρ×4/3πr³)/r²

E = ρ/3ε₀r

The charge density is given by:

ρE(r) = ρ_0(r/r_0)

ρ₀ = Q/V = Q/(4/3πr³)

ρE(r) = (Q/(4/3πr³)) x (r/r_0)

ρE(r) = (3Q/(4πr_0³)) * (r/r_0)

(a) E = Q/4πε₀r₀³ x r/r₀ x 1/3ε₀r(b) The direction of the electric field inside the sphere is radially inward.

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The path of an object through 4-dimensional spacetime is called its world line. A world line is a mathematical representation of the motion of an object through 4-dimensional spacetime, which includes the three dimensions of space and the fourth dimension of time.

It is a one-dimensional curve that starts at a point in spacetime and ends at another point in spacetime, tracing the object's path through time. Each point on a world line corresponds to a specific moment in time and a specific position in space. The world line of an object can be represented graphically as a line on a 4-dimensional coordinate system, with each point on the line representing a different moment in time.

World lines are used in many areas of physics, including special and general relativity, which describe the behavior of objects in the presence of gravity. In these theories, the world line of an object is used to calculate its motion and the effects of gravity on its motion.

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No, law of conservation of energy is not applicable to open systems.

Law of conservation of energy states that energy present anywhere can neither be created nor be destroyed by any means, it can only be converted from one form of energy to other form of energy. It means total energy of an isolated system remains same.

An open system is a system that can exchange energy and matter from the surroundings. The flow of energy takes places in an open system. Therefore, the law of conservation does not apply to an open system as it can lose or gain energy, hence its total energy will not be constant and will violate law of conservation of energy.

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Answer:

ok so first ur not a failure and its okay don't be so hard on ur self

The frequency of a note produced by a vibrating wire depends on various factors, including the length of the wire and the tension applied to it. We can use the formula for the fundamental frequency of a vibrating wire:

f = (1/2L) * sqrt(T/μ) ,

Where:

f = frequency

L = length of the wire

T = tension applied to the wire

μ = linear mass density of the wire

Let's calculate the initial linear mass density (μ) using the given information:

Length (L) = 80 cm = 0.8 m

Tension (T) = 40 N

Next, we'll find the initial frequency (f1) using the formula:

f1 = (1/2L) * sqrt(T/μ)

Now, we'll calculate the new length and tension:

New Length (L2) = 0.8 m / 2 = 0.4 m (halved)

New Tension (T2) = 40 N * 2 = 80 N (doubled)

Finally, we can find the new frequency (f2) using the same formula:

f2 = (1/2L2) * sqrt(T2/μ)

Comparing the initial frequency (f1) and the new frequency (f2) will allow us to determine the change in frequency.