ssuming the same total time of flight, what is the difference between the maximum height of the ball thrown on the moon, hm , and the maximum height of an identical ball thrown on the earth, he ? ignore the effects of the earth's atmosphere.

Answer:

Uauayayagagaga

Explanation:

agagagataggagagwghahahsgsgw

Answer:

They host three or more distinct ecosystems at different elevations.

Explanation:

I checked it, and its right.

Answer:

They host three or more ecosystems where animals cannot live.

Explanation:

Answer:

Scientific theories are explanations of some aspect of the natural world based on repeated observations.

Hope this helps!!!!

Answer:

The way that scientists use the word 'theory' is a little different than how it is commonly used in the lay public," said Jaime Tanner, a professor of biology at Marlboro College. "Most people use the word 'theory' to mean an idea or hunch that someone has, but in science the word 'theory' refers to the way that we interpret facts.

Explanation:

The mutual inductance (M) in a two-coil system depends on the number of turns in each coil (N₁ and N₂), the permeability of the medium between the coils (µ), and the geometry of the coils.

Mutual inductance is a measure of the ability of one coil to induce an electromotive force (emf) in the other coil when a current changes in one of them. It depends on several factors.

First, the number of turns in each coil plays a role. The greater the number of turns, the stronger the magnetic field produced by the coil, resulting in a higher mutual inductance.

Second, the permeability of the medium between the coils is important. The permeability determines how easily magnetic flux lines pass through the medium. A higher permeability leads to stronger coupling between the coils and, consequently, higher mutual inductance.

Lastly, the physical arrangement and geometry of the coils affect the mutual inductance. The proximity and alignment of the coils influence the amount of magnetic flux linking them, thereby impacting the mutual inductance.

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The time it will take for a sound to travel 15 metres in freshwater at 25°C = 0.0097sec.

The speed of sound in freshwater at 25°C = 1531 m/s

If 1531meters = 1 second

15 meters = ?

Make ? the subject of formula,

? = 15×1/1531

? = 0.009797517

Therefore, the time it will take for a sound to travel 15 metres in freshwater at 25°C =0.0097 sec.

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Answer:

2.92 m

Explanation:

As we know, frequency × Wavelength = Speed of light

so here frequency of 102.7 MHz can be written as 102.7× 10⁶ Hz..

So Lambda (wavelength) = 3×10⁸/ 102.7 × 10⁶ which gives 2.92 metres or 2.92 × 10¹⁰ Å

If a curve is banked to accommodate cars traveling at 15 m/s, It will gradually slide up the bank.

Hence the correct option is 3.

When a curve is banked, it is designed to provide a centripetal force that helps vehicles navigate the curve safely at a specific speed. In the absence of friction, such as during an ice storm, there is no lateral force acting on the car to counteract the car's tendency to continue in a straight line due to inertia.

As a result, the car will continue to move in a straight line and gradually slide up the bank of the curve. The lack of friction prevents the car from maintaining its intended trajectory along the banked curve, causing it to veer upwards.

This is because the horizontal component of the car's velocity cannot be balanced by friction, leading to an imbalance of forces and causing the car to slide in an upward direction.

Therefore, option 3 - "It will gradually slide up the bank" is the most accurate choice.

Hence the correct option is 3.

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Answer:

The mass of any amount of a solid, liquid, or gas relative to its volume is called density.

Answer: The mass of any amount of a solid, liquid, or gas relative to its volume is called density.

The exact speed of the combined trucks after a completely inelastic collision is 55 mi/h.

To calculate the speed of the combined trucks, we need to use the conservation of momentum equation, which states that the total momentum before the collision is equal to the total momentum after the collision. Since the trucks have the same mass, the momentum equation simplifies to:

(mass of truck 1 * velocity of truck 1) + (mass of truck 2 * velocity of truck 2) = (total mass of combined trucks * final velocity of combined trucks)

Plugging in the values, we have:

(50 mi/h * mass) + (60 mi/h * mass) = (2 * mass * final velocity)

Simplifying the equation, we find:

110 mi/h * mass = 2 * mass * final velocity

Canceling out the mass, we have:

110 mi/h = 2 * final velocity

Solving for the final velocity, we get:

final velocity = 55 mi/h

In summary, after a completely inelastic collision between two trucks with the same masses and initial speeds of 50 mi/h and 60 mi/h, the combined trucks will have a resulting speed of 55 mi/h.

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The time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

The cooling law is given by:

$$\frac{dQ}{dt}=-k(T-T_0)$$

where Q is the heat in the object, t is the time taken, T is the temperature of the object at time t, T0 is the temperature of the environment and k is a constant known as the cooling constant.

We need to find the time it takes for the coffee to reach a drinking temperature of 73°C given that its initial temperature is 93°C.

Therefore, we need to find the time it takes for the coffee to cool down from 93°C to 73°C when placed in a room temperature of 18°C.

Let’s assume that the heat energy that is lost by the coffee is equal to the heat energy gained by the environment. We can express this as:

dQ = - dQ where dQ is the heat energy gained by the environment.

We can substitute dQ with C(T-T0) where C is the specific heat capacity of the object.

We can rearrange the equation as follows:

$$-\frac{dQ}{dt}=k(T-T_0)$$

$$-\frac{d}{dt}C(T-T_0)=k(T-T_0)$$

$$\frac{d}{dt}T=-k(T-T_0)$$

The differential equation above can be solved using separation of variables as follows:

$$\frac{d}{dt}\ln(T-T_0)=-k$$

$$\ln(T-T_0)=-kt+c_1$$

$$T-T_0=e^{-kt+c_1}$$

$$T=T_0+Ce^{-kt}$$

where C = e^(c1).

We can now use the values given to find the specific value of C which is the temperature difference when t=0, that is, the temperature difference between the initial temperature of the coffee and the room temperature.

$$T=T_0+Ce^{-kt}$$

$$73=18+C\cdot e^{-0.09t}$$

$$55=C\cdot e^{-0.09t}$$

$$C=55e^{0.09t}$$

$$T=18+55e^{0.09t}$$

We can now solve for the value of t when T=93 as follows:

$$93=18+55e^{0.09t}$$

$$e^{0.09t}=\frac{93-18}{55}$$

$$e^{0.09t}=1.3636$$

$$t=\frac{\ln(1.3636)}{0.09}$$

Using a calculator, we can find that the time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

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The Earth's rotation axis is tilted at an angle of approximately 23.5 degrees relative to its revolution orbit.

The Earth's rotation axis is not perpendicular to its revolution orbit but is instead tilted at an angle of approximately 23.5 degrees. This tilt, known as axial tilt or obliquity, is the reason behind the changing seasons and varying amounts of sunlight received by different parts of the Earth throughout the year.

As the Earth orbits the Sun, different hemispheres receive direct sunlight at different times, leading to the alternation of seasons. During summer in one hemisphere, that part of the Earth is tilted towards the Sun, receiving more direct sunlight and resulting in warmer temperatures. In contrast, during winter in that hemisphere, it is tilted away from the Sun, receiving indirect sunlight and experiencing colder temperatures.

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Answer:

To use Snell's law to find N1, we need to know the indices of refraction and angles of incidence and refraction of the two media.

Snell's law states that:

n1 sin(theta1) = n2 sin(theta2)

where n1 and n2 are the indices of refraction of the two media, theta1 is the angle of incidence, and theta2 is the angle of refraction.

We are given n2=2.61, theta1=40°, and theta2=34°. To find N1, we need to rearrange Snell's law to solve for n1:

n1 = n2 sin(theta2) / sin(theta1)

Plugging in the values we have:

n1 = 2.61 sin(34°) / sin(40°)

n1 ≈ 2.22

Therefore, the index of refraction of the first medium (N1) is approximately 2.22, based on the given values and Snell's law.

The forces exerted by the pillars when a 90.0 kg diver stands at the far end of a 5.00 m long diving board with a mass of 6.6 kg supported by two pillars, one at the left end of the diving board, and the other 1.50 m away are 512 N and 490 N. Here options B and D are correct.

The answer to the first question is B) Counterclockwise. This is because the force applied by the adult is not directly over the pivot point, so it creates a torque that causes the teeter-totter to rotate in the counterclockwise direction.

To answer the second question, we can use the principle of torque equilibrium, which states that the sum of the torques acting on an object must be zero for it to be in rotational equilibrium. In this case, we can consider the diving board and the diver as a system.

When the diver stands at the far end of the board, the board experiences a torque due to the weight of the diver, which is given by:

τ = F × d

where F is the weight of the diver, and d is the distance from the pivot point to the point where the weight acts. Since the weight of the diver is acting downwards, the torque is acting in the clockwise direction.

At the same time, the two pillars are exerting forces on the board to support its weight and the weight of the diver. Let's call the force exerted by the pillar at the left end of the board \(F_1\), and the force exerted by the pillar 1.50 m away \(F_2\). Since the board is in static equilibrium, the sum of the forces acting on it must be zero. This gives us:

\($F_1 + F_2 - F_g = 0$\)

where \(F_g\) is the weight of the board, including the weight of the diver We can solve for \(F_1\) and \(F_2\) by considering the torque equilibrium equation:

\($\tau_1 + \tau_2 - \tau_g = 0$\)

\($\tau_1 = F_1 \times 0 = 0$\)

\($\tau_2 = F_2 \times 1.50 \text{ m}$\)

Substituting these values and the torque due to the weight of the board and the diver into the torque equilibrium equation, we get:

\($F_2 \times 1.50 \text{ m} - (90.0 \text{ kg} + 6.6 \text{ kg}) \times 9.81 \text{ m/s}^2 \times 2.50 \text{ m} = 0$\)

Solving for F2, we get:

\($F_2 = \frac{(90.0 \text{ kg} + 6.6 \text{ kg}) \times 9.81 \text{ m/s}^2 \times 2.50 \text{ m}}{1.50 \text{ m}} = 512 \text{ N}$\)

Substituting this value of \(F_2\) into the equation for the sum of the forces, we get:

\($F_1 + 512 \text{ N} - (90.0 \text{ kg} + 6.6 \text{ kg}) \times 9.81 \text{ m/s}^2 = 0$\)

Solving for \(F_1\), we get:

\($F_1 = (90.0 \text{ kg} + 6.6 \text{ kg}) \times 9.81 \text{ m/s}^2 - 512 \text{ N} = 490 \text{ N}$\)

Therefore, the forces exerted by the pillars are 490 N and 512 N, which is option D) 512 N and 490 N.

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Complete question:

Which direction does a teeter-totter rotate when an adult applies a force of 95 N at a distance of 2m from the pivot?

A) Clockwise

B) Counterclockwise

C) It does not rotate

D) Cannot be determined

What are the forces exerted by the pillars when a 90.0 kg diver stands at the far end of a 5.00 m long diving board with a mass of 6.6 kg supported by two pillars, one at the left end of the diving board, and the other 1.50 m away?

A) 675 N and 327 N

B) 327 N and 675 N

C) 490 N and 512 N

D) 512 N and 490 N

Answer:

because sound needs medium to transmit.

The sound is produced by vibration and if there is no medium there is no vibration and no vibration means no sound.

Answer: 1/10th of its weight on Earth.

Explanation: Let's assume that the weight of the object on Earth is W, and the gravitational acceleration on Earth is g. We know that weight is given by the formula:

W = m * g where m is the mass

If the gravitational attraction on another planet is 1/10th of Earth's pull, then the gravitational acceleration on that planet will be:

g' = g/10

Using the same formula for weight, the weight of the object on the new planet will be:

W' = m * g'

Substituting the value of g' in the equation above, we get:

W' = m * (g/10)

W' = (m/10) * g

Therefore, the weight of the object on the new planet will be 1/10th of its weight on Earth.

W' = (100/10) N = 10 N

So, the weight of the same object on a planet where the gravitational attraction has been reduced to 1/10th of Earth's pull would be 1/10th of its weight on Earth.

In this model of a gravitational slingshot, the velocity of the spacecraft at position 2 is the same as the velocity of the craft at position 4.

At position 1, the direction of the spacecraft changes because of the gravitational pull of the planet. Position 3 represents the point of closest approach to the planet, where the gravitational force is the strongest. The gravitational slingshot effect increases the spacecraft's velocity as it passes the planet and moves away from it, thus allowing it to reach greater speeds than would be possible otherwise.

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Answer:

measure what

Explanation:

?????????????

Answer:

B. Mass

Explanation:

Answer:

rotation

Explanation:

............................

Answer: 2nd option, Rotation

I hope this helps, and Stay Safe! :)

Answer:

When a simple pendulum makes 10 oscillation in 20 seconds, the time taken for each osillation

=20/10

= 2seconds

hence, as the time period is calculated to be 10secondd, the frequency of oscillation

=1/T

=1/2

= 0.5 here's

If a cannonball of mass 25 kg is fired straight up at an initial velocity of 8 m / s, the maximum height it can reach is 3.27 m

v² = u² + 2 a s

v = Final velocity

u = Initial velocity

a = Acceleration

s = Distance

u = 8 m / s

a = - 9.8 m / s²

At maximum height,

v = 0

Using the equation from equations of motion,

0 = 8² + ( 2 * - 9.8 * s )

19.6 s = 64

s = 3.27 m

Therefore, the maximum height it can reach is 3.27 m

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Answer:

It has to do with the polairity of said molelule. If you have vegetable oil, for example, it will not disolve in water because the oil is a non-polar compound, unlike water which is polar. The bond dipoles and differences in electronegetivity in the molecule results in this.

A key contribution of Hermann von Helmholtz to the study of neuron function was measuring the conduction speed through nerves of the action potential.

Helmholtz created a technique known as the "method of the nerve impulse" to gauge the rate of nerve conduction. He performed tests in which he stimulated a nerve at one end and timed the passage of an action potential to the other end of the nerve.

Helmholtz determined the speed of the nerve impulse by meticulously measuring these time gaps. His research and observations shed important new light on how signals move through the neurological system.

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Answer:

B. They keep harmful programs from entering the computer from the

Internet.

Explanation:

Did the test !

Answer:

A because that's the answer

Answer:

i got 6

Explanation:lmk if i’m wrong

The answer is  0.48 kg m^2

Given,

m1 = 0.2 kg

m2 = 0.3 kg

L = 2 m

Let the centre of mass is at a distance d from 0.2 kg.

So, m1 x d = m2 x (L - d)

0.2 x d = 0.3 x (2 - d)

2 d = 6 - 3d

5 d = 6

d = 1.2 m

Moment of inertia about the centre of mass,

I = m1 x d^2 + m2 x (L - d)^2

I = 0.2 x 1.2 x 1.2 + 0.3 x 0.8 x 0.8

I = 0.288 + 0.192

I = 0.48 kg m^2

All bodies have a tendency to resist changes to their current states, according to Newton's second law. A body in motion resists change by not coming to a complete halt right away, just as a body at rest resists change when it is put into motion. Similar to this, a rigid body's rotational inertia refers to the amount of torque necessary to modify the angular velocity of the body.

The concept of a rigid body's rotational inertia is crucial since it clarifies how much torque is needed to accomplish a certain goal. The mass of a rigid body and its distribution with regard to the axis around which it rotates have an impact on its rotational inertia.

The distance of the centre of mass from the axis of rotation increases or decreases the rotational inertia of a rigid body.

m1 x d = m2 x (L - d)

I=13mL2 I = 1 3 m L 2 is the moment of inertia for a rod that spins about an axis perpendicular to the rod and passing through one end. The moment of inertia is I=112mL2 if the axis of rotation passes through the middle of the rod.

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"Steel is not considered renewable resource as it contains of iron and iron is  found inside the earth."

As they are created over an extended period of time by geological processes, minerals and metals are non-renewable resources.

Only iron can be used to make steel, and in order for iron to be effective, it must first be mined from the earth. Despite being the fourth most frequent material on Earth, there is a finite amount of iron, and once it is all used up, there will be no way to make more steel.

Instead, direct-reduced iron plants can be used by steelmakers to react the rock with gas in order to remove iron from ore. Then, using an electric arc furnace powered by sustainable energy, these iron pellets can be transformed into steel.

Steel is therefore not regarded as a renewable material.

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Torque created by the weight of the beam about the new reference axis is 224 N*m.

To calculate the torque created by the weight of the beam about the new reference axis, we need to first find the perpendicular distance between the weight of the beam and the new reference axis. This distance is equal to the original distance between the weight of the beam and the original reference axis .

Adding 2 m to this gives us a perpendicular distance of 3.2 m.

Therefore, the torque created by the weight of the beam about the new reference axis is:

\(Torque = Force * Perpendicular Distance\\Torque = 70 N * 3.2 m\\Torque = 224 N*m\)

The torque created by the weight of the beam about the new reference axis is 224 N*m.

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The angular acceleration of the bicycle wheel is 23.9 rad/s².

To find the angular acceleration of the bicycle wheel, we need to use the formula:
α = τ / I
where α is the angular acceleration, τ is the torque applied, and I is the moment of inertia of the wheel. Since we are treating the wheel as a hoop, the moment of inertia can be found using the formula:
I = MR²
where M is the mass of the wheel and R is the radius of the wheel. Substituting the given values, we get:
I = (0.65 kg) × (0.25 m)²
I = 0.0406 kg⋅m²

Now we can substitute the values into the formula for angular acceleration:
α = (0.97 N⋅m) / (0.0406 kg⋅m²)
α = 23.9 rad/s²

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