Use the drop-down menus to complete the sentences. Tetra fish that live in caves are blind and have small eyes that do not work. This is an example of a . A harbour seal's flipper and a human hand have a very similar structure, but function differently. This is an example of a .

Option C is correct. Frequency can be found by counting the number of troughs per second in a wave diagram.

Frequency is defined as the number of repetitions of waves occurring in 1 second. It can also be said that Frequency is defined as the number of cycles completed in 1 second.

Frequency is given by the formula as,

\(\rm f=\frac{1}{t}\) Hz.

Hence option C is correct. Frequency can be found by counting the number of troughs per second in a wave diagram.

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Answer:

C is correct

Explanation:

Rotation period for a mass of 0.550 kg at the same radius is 1.45 s.

The rotation period of a mass in circular motion is given by:

T = 2πR/v

where T is the period, R is the radius of the circular path, and v is the velocity of the mass.

For the first mass with a mass of 0.45 kg, radius R of 0.140 m, and period T of 1.45 s, we can calculate the velocity as follows:

v = 2πR/T = 2π(0.140 m)/(1.45 s) = 0.6066 m/s

Now, we can use the velocity and radius values to find the period for the second mass with a mass of 0.550 kg:

T = 2πR/v = 2π(0.140 m)/(0.6066 m/s) = 1.45 s

Therefore, the rotation period for a mass of 0.550 kg at the same radius is 1.45 s.

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The resistance value of the multiplier resistor should be 3990 ohms.

To convert a galvanometer into a voltmeter, a multiplier resistor is connected in series with the galvanometer. The purpose of the multiplier resistor is to limit the current passing through the galvanometer and to scale the voltage being measured.

In this case, we want the maximum scale reading of the voltmeter to be 20V. The galvanometer has a full scale current of 50 and an internal resistance of 200 ohms.

To calculate the resistance value of the multiplier resistor, we can use Ohm's Law and the principle of voltage division. Ohm's Law states that V = IR, where V is the voltage, I is the current, and R is the resistance.

Since the maximum scale reading of the voltmeter is 20V, we can set up the equation as follows:

Vmax = Ic * (Rg + Rm)

Where Vmax is the maximum scale reading, Ic is the full scale current of the galvanometer, Rg is the internal resistance of the galvanometer, and Rm is the resistance of the multiplier resistor.

Substituting the given values, we have:

20 = 50 * (200 + Rm)

Simplifying the equation, we get:

Rm = (20 - 50 * 200) / 50

Calculating the value, we find:

Rm = -3990 ohms

However, resistance cannot be negative, so we take the absolute value:

Rm = 3990 ohms

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The answer is 76 Ω.  because it includes the derivation and calculation process.

To make a DC voltmeter with a maximum scale reading Vmax = 20V using a galvanometer with a full-scale current Ic = 50 and an internal resistance r = 200 ohms, we need a resistor Rm in series with the galvanometer.

The resistance value of this multiplier resistor Rm can be calculated as follows:Vmax = IRm + IcR Where,

Vmax = 20V,

Ic = 50,

R = 200 ohms

Rm = (Vmax - IcR)/I

=(20 - 50×200)/50

=-3800/50

=-76 ΩSo,

the resistance value of the multiplier resistor should be -76 Ω.

However, since it's impossible to have a negative resistor, the value of the resistor should be rounded off to 76 Ω. Hence, the answer is 76 Ω.  because it includes the derivation and calculation process.

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Answer:

The final velocity v₂ is 45 m/s

The highest point reached by the rocket is 101.25 m

The total time spent in air by the rocket is 7.5 s

Explanation:

Given;

initial velocity of the rocket, v₁ = 0

final velocity of the rocket, v₂ = ?

upward acceleration of the rocket, a = 15 m/s²

time of acceleration, t = 3 s

The final velocity is given by;

v₂ = v₁ + at

v₂ = 0 + (15 x 3)

v₂ = 45 m/s

The highest point reached by the rocket is given by;

v² = u² + 2ah

where;

u is the initial velocity of rocket when it started decelerating.

thus, u = v₂

v is the final velocity of the rocket at its highest point = 0

0 = v₂² + 2ah

0 = (45)² + (2 x -10 )h

0 = 2025 - 20h

20h = 2025

h = 2025 / 20

h = 101.25 m

Time taken for the rocket to reach its highest point is given by;

h = ut + ¹/₂at²

101.25 = 45t + ¹/₂(-10)t²

101.25 = 45t - 5t²

5t² - 45t + 101.25 = 0

t² - 9t + 20.25 = 0

t = 4.5 s

The total time spent in air by the rocket is given by;

T = upward time + downward time

T = 3 s + 4.5 s

T = 7.5 s

Answer:

I think B) is uncorrect

Explanation:

As A) p=w/t so it's correct relation

C) power depend on time and work as work is distance multiple force so it refer to velocity

D) the powerful mean much work in a few time

Answer:

Wavelength  = 0.48 m (Approx)

Explanation:

Given:

Speed of sound = 340 m/s

Frequency = 706 hz

Find:

Wavelength

Computation:

Wavelength  = Speed of sound / Frequency

Wavelength  = 340 / 706

Wavelength  = 0.48 m (Approx)

Answer:

Explanation:

Let the angle required be θ with direction opposite to current .

cos θ = 3 / 5

θ = 53° .

Resultant velocity towards the opposite side

= √ ( 5 ² - 3²)

= 4 km /h

distance covered = 1.2 km

time taken = 1.2 / 4 = .3 h

= 18 min .

Therefore, the velocity of the ball just before it hits the ground is approximately 22.1 m/s. Therefore, the closest value to this option is 21.0 m/s.

When a ball of mass 0.25 kg falls from a height of 50 m, we can calculate its velocity using the principle of conservation of energy. According to this principle, the sum of the potential and kinetic energy of an object remains constant.

Therefore, we can equate the potential energy at the initial height to the kinetic energy at the final velocity.Let's calculate the potential energy of the ball at the initial height

:Eg = mghEg = 0.25 kg × 9.81 m/s² × 50 m

Eg = 122.625 J

This is the energy that the ball has due to its position. As it falls, this energy is transformed into kinetic energy. At the moment the ball reaches the ground, all the potential energy has been transformed into kinetic energy

.Ek = 1/2mv²Ek = Egv² = 2Ek/mv = √(2Ek/m)

Let's plug in the values we obtained:Eg = 122.625 Jm = 0.25 kgv = √(2Ek/m)

We obtain:v = √(2 × 122.625 J / 0.25 kg)v = √(245.25 J/kg)v = 22.116 m/s

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Answer:

hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9

According to motion in straight line  t1≠t2

A biker travels d1 meters in t1 seconds at v1 m/s for the first leg and d2 meters in t2 seconds at v2 m/s for the second leg. It's possible that t1t2 if his average speed is equal to the average of v1 and v2.
An object is said to be in motion if its position in relation to its surroundings changes over time. It is a shift in an object's position over time. The only type of motion that exists is motion in a straight line.

A reference system is constantly used to describe a particle's motion. An arbitrary origin point is used to create a reference system, and a coordinate system is imagined to be connected to it. The reference system for a specific problem is the coordinate system that has been selected for it. For the majority of the problems, we typically select an earth-based coordinate system as the reference system.

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The electric potential at a point due to the charged sphere will be equal to that due to the point charge if the radial distance of the point is greater than or equal to the radius of the charged sphere since the amounts of the charges are identical.

One of the essential components of matter is a point charge, such as an electron. Furthermore, circular charge distributions (such as those seen on a metal sphere; see image below) produce external electric fields in the same way that point charges do. Thus, a scenario that requires our attention is the electric potential caused by a point charge. It may be demonstrated that the electric potential V of a point charge is equal to the work required to transfer a test charge q from a great distance away to a distance of r from it using calculus and observing the relationship between work and potential (W=-qV).

The point charge formula is V=kQr, where k is a constant equal to 9.0109 Nm2/C2.

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Answer:

320 m/s

Explanation:

40 miles per second and 8 seconds makes 40 times 8

Answer:

Hope this helps you mate.

Explanation:

Nervous system consists of brain,spinal cord and nerves.

When finding the area between two curves, the result should always be the absolute value of the difference between the integrals of the upper and lower curves over the given interval.

The area between two curves can be calculated by taking the integral of the upper curve function minus the integral of the lower curve function over the interval of interest.

Mathematically, the formula for the area A between two curves f(x) and g(x) over the interval [a, b] can be expressed as:

A = ∫[a, b] |f(x) - g(x)| dx

To find the area, it is crucial to take the absolute value of the difference between the two curves to ensure a positive value for the area. This is because the upper curve may change between the two functions depending on the region of the interval.

By taking the absolute value, the resulting area will always be positive and represent the magnitude of the enclosed region.

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Answer:

the answer is C

Explanation:

this is because pressure is defined as the force acting per unit area thus,

the lower the area the higher the pressure

this can be explained by This,

will you experience pain if touch the tip of the needle or your pen

the area in the needle is less thus, more pressure

hope this helps,

Supination of the forearm occurs in the sagittal plane of motion.

Movements along a horizontal axis in the transverse plane separate the body into upper and lower portions. Supination, which causes the radius to rotate around the ulna, is a movement of the forearm in which the palm faces upward or forward. The palm can be turned from an inward or downward position to an upward or outward position with this motion.

The radius and ulna, two bones in the forearm, aid in supination. The hand and palm change positions from pronated (palm facing below) to supinated (palm facing upward) as the radius rotates externally or laterally in relation to the ulna. This motion is crucial for many tasks, like turning a doorknob and pouring a drink. These rotating motions are produced by the transverse plane, which makes it the ideal plane of motion for forearm supination.

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The net work done on the coffee mug is 0.00618 J.

The given parameters;

The net work done on the mug is calculated as follows;

\(W = (F- F_f)d\\\\W = (F \ - \mu F_n)d\\\\W = (F - \mu mg)d\\\\W = (0.1 \ - \ 0.05 \times 0.12 \times 9.8)\times 0.15\\\\W = 0.00618 \ J\)

Thus, the net work done on the coffee mug is 0.00618 J.

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Answer:

heat and power

Explanation:

is the simultaneous production of electricity and heat both of which are used

A) Formulate policies to protect wetlands and ensure that the policies are enforced.

B) Wetlands hold important biodiversity. They are a source of foods, medicines, and raw materials. They help with stabilizing the climate.

As a governor of my state, the two most important steps to protect wetlands include:

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To protect the wetlands, I will ensure a strict enforcement of all existing state laws on the conservation of wetlands.

The wetlands are those areas that consists of marshes and swamps. They are of great important to the ecosystem and biodiversity.

a) The two things that I will do to protect wetlands are;

b) Wetlands are very important because;

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Bonding jumper is located at the service disconnect. This is the point in the electrical system where the main breaker or fuses are located, and where the power from the utility company enters the building.

The main bonding jumper is an important component that connects the grounded conductor (neutral) and the equipment grounding conductor to ensure a low-impedance path for fault currents. This helps to prevent electrical shock and fire hazards.

the main bonding jumper plays a crucial role in ensuring the safety and proper functioning of the electrical system, and it is located at the service disconnect.


To ensure safety and proper functioning of an electrical system, it is important to know the location of the main bonding jumper, which is at the service disconnect.

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The main bonding jumper is situated at the b) service disconnect. It plays a key role in ensuring safety by causing the circuit breaker to trip in case of a fault condition, which then forces the repair of the appliance. Besides, circuit breakers and GFCIs are also vital protective devices for preventing electrical accidents.

The main bonding jumper is typically located at the service disconnect (b), which is designed to interrupt the electric service for maintenance or emergency.

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Answer: Flying into the wind provides more lift, but reduces the plane's “ground speed”, the speed of the plane relative to the ground hope this helps

These setups allow for the observation of the interaction between electric currents and magnetic fields, providing evidence that an electric current produces a magnetic field.

To demonstrate that an electric current produces a magnetic field, the following set of objects could be used:

1. Compass and a wire: Place a compass near a straight wire carrying an electric current. The compass needle will deflect, aligning itself with the magnetic field produced by the current. This demonstrates the magnetic field generated by the electric current.

2. Solenoid and iron filings: Create a solenoid by wrapping a wire into a coil shape and passing an electric current through it. Sprinkle iron filings around the solenoid, and the filings will align themselves along the magnetic field lines produced by the current. This demonstrates the magnetic field generated by the electric current in the solenoid.

3. Magnetic needle and a battery: Connect a wire to the terminals of a battery and create a loop by bending the wire. Place a magnetic needle inside the loop. When the circuit is closed, an electric current will flow through the wire, and the magnetic needle will align itself with the magnetic field produced by the current. This demonstrates the magnetic field generated by the electric current.

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The radial force exerted on an object varies with the radius of its circular path when it is revolving on constant frequency.

Radial force (RF) is the average pressure over the. the floor of the compressed object instances the surface area of the object. (while the tool is compressed by a segmented radial compression mechanism, RF is likewise the same as the sum of the forces on every die tip, perpendicular to the tip surface.

The force that acts inside the X-axis route is described as the tangential pressure feet (N) The force that acts in the Y-axis course is defined because of the radial force. The force implemented to a bearing is known as the load. The pressure applied perpendicularly to the shaft is referred to as the radial load, and that is implemented in the equal path as the shaft is referred to as the axial load.

centripetal force = mass × centripetal acceleration

F = mv²/r

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To find the acceleration of the dog, we need to use the following formula:

a = (v_f - v_i) / t

Where:

a = acceleration

v_f = final velocity

v_i = initial velocity

t = time

In this case, the initial velocity (v_i) of the dog is 1.23 m/s to the east (positive direction) and the final velocity (v_f) is unknown. The displacement (d) of the dog is 34.3 m to the east (positive direction) and the time (t) taken to travel this distance is 7.3 s.

We can use the formula for displacement to find the final velocity:

d = (v_f + v_i) / 2 * t

Rearranging this formula to solve for v_f, we get:

v_f = (2 * d / t) - v_i

Substituting the given values, we get:

v_f = (2 * 34.3 m / 7.3 s) - 1.23 m/s

v_f = 4.04 m/s

Now we can substitute the values of v_f, v_i, and t into the formula for acceleration:

a = (v_f - v_i) / t

a = (4.04 m/s - 1.23 m/s) / 7.3 s

a = 0.410 m/s^2 [E]

Therefore, the acceleration of the dog is 0.410 m/s^2 to the east (positive direction).

Measurements of one Paramecium cell performing the barium dance show that it is moving to the left at 100 μm/s before adding barium, the average acceleration of the cell is 20 μm/s².

The formula for average acceleration can be used to get the cell's average acceleration:

\(\[ \text{Average Acceleration} = \dfrac{\text{Change in Velocity}}{\text{Time Interval}} \]\)

Given values:

Initial velocity (\(\(v_i\)\)) = 100 μm/s (to the left)

Final velocity (\(\(v_f\)\)) = 200 μm/s (to the right)

Time interval (t) = 5 seconds

The change in velocity is the difference between the final velocity and the initial velocity:

\(\[ \text{Change in Velocity} = v_f - v_i \]\)

Substitute the values:

\(\[ \text{Change in Velocity} = 200 - 100 \\\\= 100\)

Now, plug this into the formula for average acceleration:

\(\[ \text{Average Acceleration} = \dfrac{\text{Change in Velocity}}{\text{Time Interval}}\\\\ = \dfrac{100 }{5 }\)

= 20 μm/s².

Therefore, the average acceleration of the cell is 20 μm/s².

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The L'Hospital's rule states that if two functions tend to the same limit, then their derivatives also tend to the same limit. In the case of the pulley problem, when the system reaches equilibrium, the value of x is the limit of the ratio of the forces acting on the pulley.

To solve this problem, we need to use L'Hopital's Rule, which states that if the limit of the ratio of two functions f(x) and g(x) is in the form of 0/0 or ∞/∞, then the limit of the ratio can be found by taking the derivative of both functions and finding the limit of the new ratio. In this case, we are given the equation: f(x) = g(x) Taking the derivative of both sides gives us:

Now we can plug in the values for f(x) and g(x) and solve for x:

Setting the two derivatives equal to each other and solving for x gives us:

Therefore, when the system reaches equilibrium, the value of x is 2.

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The position of an object is where it sits on the number line. When the object moves to another position, its displacement is the second position minus the first position.

Δ x = x2 − x1

The word displacement implies we keep track of which way the movement occurs. In one dimension the direction is indicated by the sign: negative if to the left and positive if to the right. The word distance means how far the object moves regardless of direction. It is always positive and is equal to the absolute value, or magnitude, of the displacement.

If one follows the rule of always subtracting the first position from the second, the sign always works out to be positive if the displacement is to the right and negative if the displacement is to the left.

Due to the fundamental differences between these two galaxy types, galaxies cannot evolve from elliptical to spiral (or spiral to elliptical).

For example, in contrast to spiral galaxies, which include gas and dust as well as hot, bright O and B type stars, elliptical galaxies are devoid of visible gas and dust and hot, brilliant stars.

A galaxy with an elliptical shape and a uniform brightness distribution is called an elliptical galaxy (no spiral arms). Elliptical galaxies are stretched galaxies with an elliptical shape, according to astronomical physics. The light is distributed evenly and smoothly throughout this type of galaxy, which is typically composed of old stars.

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