Which of the following amounts to a scientific research process that can be replicated?

A. After a tsunami, scientists gather geological evidence to understand what happened.

B. Every spring, biologists study birds that migrate across the desert to find food and water.

C. Based on weather conditions, meteorologists predict the possibility of tornadoes forming.

D. All of the above.

Answer:

The answer is 0.042 Hz (rounded)

or 0.0417 Hz

Explanation:

Hope it helps

Answer:

The answer is 0.041Hz

Explanation:

The answer is 0.041Hz

I guess

Answer: 1.14 kg*m/s

Explanation:

The first person explained everything right, they just forgot to convert the angular acceleration to rads/sec^2 from revs/sec^2. Once that is converted, your answer should come out right.

Another small thing, the answer there has an extra unnecessary step. It tells you to find the square root of w^2 to find w but that is unnecessary since the final equation asked for w^2. Hope this helps! :)

The moment of inertia I of the flywheel about its rotation axis is

Given

Angular displacement,

\(\theta = 30rev \\\\\theta = (30) * 2\pi rad \\\\\theta = 188.495rad\)

Therefore, Final angular velocity (w) will be:

\(w^2 = 2\alpha\theta\\\\w^2 = 2 * (0.200 * 2\pi) * (188.49)\\\\w^2 = 473.73\\\\w = 21.76 rad/s\)

Therefore,

moment of inertia

\(I = 2 * K / w^2\)

\(I = 2 * 330 / 473.73\)

\(I = 1.39kgm^2\)

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Batteries are connected when the terminal voltage across each of them was measured because batteries have an internal resistance that is in series with the load.

A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products

In batteries, the chemical energy is converted into electrical energy with help of a chemical reaction happening inside the battery.

Batteries and other power sources have an internal resistance that runs parallel to the load. The overall resistance of the path of the electron flow inside the source constitutes the internal resistance, which is not technically a resistor. Usually, internal resistance is extremely minimal.

Thus, considering the internal resistance of the batteries, the terminal voltage across each of them was measured.

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The boy throws the ball horizontally. The initial velocity of the ball as it left the boy's hand was approximately 3.72 m/s.

Initial velocity, often represented as v0, is the velocity of an object at the beginning of a time interval or at the start of a motion.

Use the following kinematic equations to arrive at the answer:

Horizontal velocity (Vx) = Distance / Time

Vertical displacement (y) = V0y*t + (1/2)gt²

Vertical velocity (Vy) = V0y + g*t

Tan(theta) = Vy / Vx

where V0y is the initial vertical velocity, g is acceleration due to gravity (9.8 m/s²), and theta is the angle of inclination.

First, let's find the time it takes for the ball to hit the ground. We can use the vertical displacement equation and set y = 0:

0 = V0y*t + (1/2)gt²

Simplifying and solving for t, we get:

t = sqrt((2y) / g)

= sqrt((21.10 m) / 9.8 m/s²)

= 0.472 s

Now, we can use the horizontal velocity equation to find Vx. Since the ball was thrown horizontally, Vx is the same as the initial velocity (V0):

Vx = Distance / Time

= (horizontal distance travelled by ball) / t

We don't know the horizontal distance travelled by the ball, but we can find it using the vertical displacement equation. At the instant the ball hits the ground, its vertical displacement (y) is:

y = V0y*t + (1/2)gt²

= 0 + (1/2)gt²

= (1/2)*9.8 m/s² * (0.472 s)²

= 1.10 m

This means the ball travelled a total distance of:

distance = horizontal distance + vertical distance

= x + 1.10 m

where x is the horizontal distance travelled by the ball. We can find x using the angle of inclination and the vertical displacement:

Tan(theta) = Vy / Vx

Vy = V0y + g*t

Solving for V0y, we get:

V0y = Vy - g*t

Plugging in the numbers, we get:

V0y = Tan(theta) * Vx - g*t

= Tan(30 deg) * Vx - 9.8 m/s² * 0.472 s

= 0.577 * Vx - 4.62 m/s

Now, we can use the vertical displacement equation again to find x:

y = V0yt + (1/2)gt²

= (0.577Vx - 4.62 m/s) * 0.472 s + (1/2)*9.8 m/s² * (0.472 s)²

= 1.10 m

Simplifying and solving for Vx, we get:

Vx = (2y - 0.577V0t) / t

= (21.10 m - 0.577*(0.577*Vx - 4.62 m/s)*0.472 s) / 0.472 s

= 3.72 m/s

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Given

The voltage of the battery, V=20.0 V

The resistance of the two resistors are 40 ohm each.

The two resistance are connected in parallel

To find

The current through the circuit.

Explanation

The resistors are connected in parallel

Thus the equivalent resistance is

By Ohm's law,

where I is the current through the battery

Putting the values

Conclusion

The current through the battery is 1.00 A

To find the mass in kilograms, you need to know the object's weight in newtons and the acceleration due to gravity. The formula for finding mass is mass = weight / acceleration due to gravity. So if you have an object with a weight of 100 N and the acceleration due to gravity is 9.8 m/s^2, the mass would be 10.204 kg.

The mass of the block is 0.025 kg or 25 g, when the spring has k = 28 N/m, and compresses 0.11 m before bringing the block to rest.

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Explanation:

We know that, like charges repel and unlike charges attract each other.

IF one of the charge is four times that of the other and both charges are positive, the field lines is shown in figure (1).

Two negative charges attract each other, the field lines is shown in figure (2).

The net force between charges is given by :

\(F=\dfrac{kq_1q_2}{r^2}\)

Whre

k is the electrostatic constant

r is the distance between charges

Answer:

Astronomers can detect them by watching for their effects on nearby stars and gas. ... The star clusters then sink to the center of the galaxy, where the intermediate-mass black holes merge to form a supermassive black hole.

Answer: the answer is 6kg.

Explanation:

Mass= force divided by acceleration, which would be 12 divided by 2.

Answer:

 U = 4 U₀

we see that the gecko must use 4 times more energy to double the force

Explanation:

For this exercise they indicate that we can approximate the situation to a charged capacitor, so the stored energy is

            U = Q² / 2C

where C is the capacitance that does not change since it is the same gecko and Q is the stored charge.  In the initial state

          U₀ = Q₀² /2C

They tell us that the load is doubled

         Q = 2Q₀

where Qo is the initial charge; the new energy is

         U = (2Q₀)² / 2C

         U = 4 Q₀² / 2C

         U = 4 U₀

where U₀ is the initial energy

Therefore we see that the gecko must use 4 times more energy to double the force

Answer:

By a factor of 9/4

Explanation:

Applying Coulomb's law,

F = kqq'/r²................... Equation 1

Assuming q and q' are the two point charges respectively.

Where k = coulomb's constant, r = distance between the charges.

When the point charges are 3.0 m apart,

F = kqq'/3²

F = kqq'/9.................... Equation 1

When they are moved to a new distance, 2.00 m

F' = kqq'/2²

F' = kqq'/4................. Equation 2.

Comparing equation 1 and equation 2.

F' = 9F/4

Hence the resulting mutual force change by a factor of 9/4

The GPE (Gravitational potential energy) of the balloon of mass 250 kg is 367500 J.

To calculate the GPE of the balloon, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the GPE of the balloon is 367500 J.

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Answer:

B. its consist of waves of varying lengtu

We can use the kinetic equation that combines velocity, acceleration, and time to calculate the number of months until the bank account is empty:

\(v = v_0 + at\)

Since initially there is no net change in the account balance, the initial velocity \((v_0)\)in this case is 0. 22.5 * $102 per month expressed as Acceleration (a). The moment (t) at which the account balance reaches zero must be determined.

We can arrange the equation to solve for time as follows:

\(0 = 0 + (22.5 * 10^2) * t\)

When we simplify the equation, we get:

2250t = 0

After 0 months the account balance will be zero as the result of the calculation will be 0. This shows that the bank account is currently empty or will be empty soon.

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A uniform metal rod with of length 80cm and a mass of 3.2kg is supported horizontally by two vertical spring balances C and D. Balance C is 20cm from one end while D is 30cm from the other end would show the reading of 1.06 Kg and 2.13 kg respectively

It can be defined as the force by which a body attracts another body towards its center as the result of the gravitational pull of one body and another, The gravity varies according to the mass and size of the body for example the force of gravity on the moon is the 1/6th times of the force of gravity on the earth.

As given in the problem, A uniform metal rod of the length of 80cm and mass of 3.2kg is supported horizontally by two vertical springs balance C and D. Balance C is 20cm from one end while D is 30cm from the other end

The weight of the rod acting downward is from the center of the rod at 40 cm

Let us suppose the reading on the spring balance C and D are P and Q respectively

By using the equilibrium for the vertical force

Fv=0

P + C = 3.2

By using the equilibrium for the moment around the left corner

20×P+ 50×Q= 40 ×3.2

By solving for both P and Q from the above two equations we would get

P =1.06 and Q = 2.13

Thus, the reading on the spring balance C and D would be 1.06 Kg and 2.13 kg respectively

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Answer:

C) Momentum

Explanation:

Refers to an objects mass in motion.

Answer:

Perpendicular to the polarization

Explanation:

In this question, we are interested in selecting the option that best complete the question.

The direction of propagation of light is perpendicular to the polarization. Polarized and unpolarized light behave in different manners.

In unpolarized light, the oscillation of the magnetic and electric occurs in all directions to the propagated light.

However, in the case of polarized light, there is a restriction of the electric field oscillation. And thus, it only oscillates in a direction which is perpendicular to the propagation light

2 kg

Explanation

to maintain the system in equilibrium the sum of momentums(or torques) in The point of contatc must be equal to zero,so

the torque(M) is given by

so for M1

and M2 must be equal, so

now, as M1= M2

set equal and solve for m

therefore, the mass of the rock is 2 kg

Answer:

Help out with the laundry himself.

Explanation:

In social learning theory, it's a process where people tend to observe the actions of others and then imitate them.

Now, since this father wants to teach his son to start helping his mother do the do laundry, what he can do according to social learning theory is to help with the laundry himself first.

Answer:

She fell out of a tree

Explanation:

ANSWER:

a. 240 ohms

STEP-BY-STEP EXPLANATION:

Given:

Voltage (V) = 120 V

Current (i) = 0.50 A

We can calculate the resistance using the following formula:

Therefore the correct answer is a. 240 ohms

Given,

Distnace covered by the falling body in t seconds, d=16t²

the total time duration Δt=3.2-2=0.2 s

The average velocity is given by the ratio of the total distance to the time duration.

Thus the average velocity of the given body over the given time interval is given by,

On substituting the known values in the above equation,

Thus the average velocity of the given object is in the given period is 3.2 ft/s.

When the thistle funnel is moved upwards towards the surface of the liquids, the height (h) decrease.

What happens when the thistle funnel is moved upward?

An important principle outlined by Pascal's law states that any fluid (in this instance, liquids) experiences equal transmission of force in every direction within it. Hence, there is an intimate relationship between the height of a liquid column and its pressure.

Raising a thistle funnel reduces this height causing loss of weight from above this point thus decreasing its pressure.

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See complete question in the attached image.

Answer:

natural convection

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

Answer:

Explanation:

252,000

To encourage children to eat, create a pleasant and distraction-free mealtime environment, serve a variety of visually appealing and small portions of favorite foods, involve them in meal planning and preparation, provide a relaxed and comfortable atmosphere, and avoid using food as a reward or punishment. Appropriate snack foods from each food group for school-age children can be selected from fruits, vegetables, grains, protein, and dairy. Adults can help children learn to enjoy nutritious food and establish healthy eating habits by modeling healthy eating behaviors, involving children in grocery shopping and meal planning, making meals enjoyable and fun, providing healthy food choices, and avoiding using food as a reward or punishment.

1. To create an atmosphere that encourages children to eat, several features can be used, such as:

A pleasant and inviting mealtime environment that is free of distractions such as television, mobile phones, or tablets.

Serve a variety of colorful, visually appealing foods in small portions, making sure to include favorite foods of the child.

Involve children in meal planning and preparation, giving them the opportunity to select foods and participate in simple meal preparation tasks.

Provide a relaxed and comfortable atmosphere by allowing enough time for meals and offering positive reinforcement for good eating behaviors.

Avoid using food as a reward or punishment and ensure that mealtimes are stress-free and enjoyable for children.

2. MyPlate is a visual representation of the five food groups that form a healthy and balanced diet. Appropriate snack foods from each food group for school-age children could include:

Fruits: apple slices, berries, bananas, or orange wedges.

Vegetables: carrot sticks, cherry tomatoes, cucumber slices, or celery sticks.

Grains: whole-grain crackers, granola bars, rice cakes, or air-popped popcorn.

Protein: hard-boiled eggs, cheese sticks, nut butter, or hummus.

Dairy: yogurt, milk, or cheese cubes.

3. Adults can help children learn to enjoy nutritious food and establish healthy eating habits by:

Modeling healthy eating behaviors and food choices themselves.

Encouraging children to try new foods and flavors, involving them in grocery shopping, and meal planning.

Making meals enjoyable and fun by creating a positive mealtime environment and involving children in meal preparation tasks.

Providing healthy food choices and limiting the availability of unhealthy options at home and school.

Offering regular mealtimes and avoiding using food as a reward or punishment.

Hence, Encourage children to eat by providing a pleasant and distraction-free mealtime environment, serving a variety of visually appealing and small portions of favorite foods, involving them in meal planning and preparation, providing a relaxed and comfortable environment, and avoiding using food as a reward or punishment. Fruits, vegetables, grains, protein, and dairy are examples of appropriate snack foods from each food group for school-age children. Adults can assist children in learning to enjoy nutritious food and develop healthy eating habits by modeling healthy eating behaviors, involving children in grocery shopping and meal planning, making meals enjoyable and fun, providing healthy food options, and avoiding using food as a reward or punishment.

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The value added by the baker is $3. The bread's contribution to GDP is the final sale price of the bread, which is $6

In this scenario, each person involved in the production and sale of the bread adds value to the final product. The concept of value added refers to the increase in the market value of a product at each stage of production.

The farmer grows the wheat and sells it for $1. The value added by the farmer is $1.

The miller processes the wheat into flour, increasing its value. The miller sells the flour to the baker for $3, so the value added by the miller is $3 - $1 = $2.

The baker uses the flour to make bread, further adding value to the product. The baker sells the bread to the engineer for $6, so the value added by the baker is $6 - $3 = $3.

The engineer consumes the bread, but since no further economic value is added, there is no additional value added by the engineer.

The bread's contribution to GDP (Gross Domestic Product) is the final sale price of the bread, which is $6. GDP measures the total value of all goods and services produced within a country's borders, and the sale of the bread represents the final output of the production chain.

Overall, the value added at each stage contributes to the final price of the bread, and the final sale price of the bread represents its contribution to GDP.

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