Brady connected the lose wire to the battery and created an electromagnet as shown below. He picked up 45 thumb tacks with his electromagnet, though his goal was to pick up 50 thumb tacks. What could Brady do to increase the strength of his electromagnet and pick up more thumbtacks?

Answer:

C

Explanation:

Answer:

A

because volcano can produce sediment and

erodus rock

Answer:

A. Pu -239

Explanation:

An isotope is an element with the same atomic number but different mass number. most isotope are unstable, having short half life.

Curium-242 is an isotope produced when Plutonium 239 is bombarded by an alpha particle. This reaction between Plutonium 239 and alpha particle gives curium-242, neutron and a high amount of energy as the products.

Curium oxidizes easily, and it is a dangerous metal which can cause cancer initiation when absorbed by biological materials e.g bones or tissue.

The second bowler must throw the 6.4 kg ball with a speed greater than 4.078 m/s to win the competition.

To determine the speed the second bowler must beat to win the competition, we first need to calculate the momentum of the first bowler's ball. Momentum (p) is defined as the product of an object's mass (m) and its velocity (v): p = mv.
For the first bowler, we have:
Mass (m1) = 4.5 kg
Velocity (v1) = 5.8 m/s
Momentum (p1) = m1 × v1 = 4.5 kg × 5.8 m/s = 26.1 kg·m/s
Now, we'll determine the required speed (v2) for the second bowler to have a larger momentum. We have the mass of the second ball (m2) as 6.4 kg, and we want the momentum of the second ball (p2) to be greater than the first ball's momentum (p1).
p2 = m2 × v2 > 26.1 kg·m/s
To find the required speed (v2), we'll solve the inequality for v2:
v2 > (26.1 kg·m/s) / (6.4 kg)
v2 > 4.078 m/s
So, the second bowler must throw the 6.4 kg ball with a speed greater than 4.078 m/s to win the competition.

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Answer:

w = 0.01 t⁻²   rad/h

Explanation:

Let's use trigonometry to find the elevation angle of the telescope, we assume that the rocket remains fixed in the telescope.

        tan θ = CO / CA

the adjacent leg is CA = 16 km = 16 10³ m

Let's use kinematics to find the height of the rocket

          v = y / t

          y = v t

this height is equal to the opposite leg

          CO = v t

we substitute

         tan θ = vt / 16

         tan θ = 1200/16 t

         tan θ = 75 t

         θ = tan⁻¹ ( 75 t )

speed is defined by

          w = dθ/dt

          w = \(\frac{1}{1 + (75 t)^2} \ 75\)  

as time increases we can neglect the 1 of the denominator

          w = 1/75 t²

          w = 0.0133 t⁻²

Using three significant figures

           w = 0.01 t⁻²   rad/h

for this answer the time must be given in hours

Answer:

The answer is drag.

Explanation:

Hope this helped Mark BRAINLEST!!!!!

Answer: D. Drag

Explanation:

Drag friction exists between solid objects moving in the water.

The solar system shows the planets in their orbits around the sun in this order: Mercury, Venus, Earth with Moon, Mars, Jupiter, Saturn. Fixed stars are around the outside of the orbit of Saturn.

Explanation:

Aristarchus of Samos was an ancient Greek astronomer and mathematician who presented the first known heliocentric model that placed the Sun at the center. So I had to choose the choice that was most similar to that.

Answer:

Kinetic Energy = 1/2 mass*velocity^2

K=1/2mv^2

Therefore if you reduce the speed of an object by 1/2, K reduced to 1/4 its value.

Answer:

Thermal equilibrium

Explanation:

Two systems are said to be in thermal equilibrium when there is no further exchange of thermal energy between them. At thermal equilibrium, these systems possess equal temperature.

Thermal energy is transferred between objects of varying temperatures or between a system and the surrounding. The thermal energy is transferred from the object with higher temperature (hotter) to the one with lower temperature (colder) until a state of equilibrium is attained.

In the case of the coffee and the environment, if the coffee is at higher temperature than the surrounding, it loses heat energy to the surrounding until both of them are now at the same temperature. Conversely, if the coffee has a lower temperature than the surrounding, it gains thermal energy from the surrounding until thermal equilibrium is achieved.

Answer:

As you must know, Convection Current is the transfer of heat by actual movement of molecules from a hot to cold place due to difference in densities. Thus, the phenomenon of convection current is also observed in nature, for example the Land and Sea Breezes help in keeping the temperature moderate in coastal areas. Convection current in air also helps the birds and gliders to stay in air for a long period.

hope that helps...

A colloid is a combination in which one material is suspended throughout another substance and contains scattered insoluble particles. Blood is a colloid solution.

A colloid is a combination in which one material is suspended throughout another substance and contains scattered insoluble particles. The whole combination is referred to as a colloidal solution.

A colloid contains a dispersed phase a continuous phase. The colloidal mixture must either not settle or settle extremely slowly.

The above property is shown by the blood. Hence blood is a colloid solution.

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Answer:

heterogeneous , suspension

Explanation:  believe me or don't idc

Water has a stronger force of attraction between its particles than methane.

To justify this we have to remember that temperature is a measure of the kinetic energy of the particles (atoms and molecules) in a given system. As temperature increase the kinetic energy increases as well; now larger molecules will have more electron and nucleis that attract with each other, then they will need more kinetic energy (temperature) to boil.

Chains are the type of resistance training equipment which has a fixed range of motion.

This is a type of force which restricts the motion of an object thereby slowering it down.

Chains help to build stamina and power though varying the loads in a fixed range of motion. This is why it was chosen as the most appropriate choice.

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Few meteors make it through the thick air of this planet without disintegrating. This statement is false.

Meteors refer to heavily sized metallic objects or rock fragments that are formed as a result of a collision between asteroids.

These rock lumps revolve around the sun and are smaller in size than asteroids.

Their size ranges from grain-sized particles to about 1 meter wide objects

As they enter the atmosphere of earth they crash forming streaks of light and disintegrate into small-sized dust particles and never get through the thick air of the earth.

However, they impact the earth in several ways such as heating the earth's surface.

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Two widely separated galaxies are moving apart due to the expansion of the universe.

The expansion of the universe is causing all galaxies to move away from each other at increasing speeds. This means that galaxies that are farther apart will be moving away from each other faster than galaxies that are closer together. Therefore, two widely separated galaxies will be moving apart due to the expansion of the universe. The other systems mentioned in the answers (two planets in orbit around a star and two stars in a galaxy) are not affected by the expansion of the universe because they are too small and too close together for the expansion to have a significant impact.

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The molecules of Object D move the fastest, as they have the highest kinetic energy. This can be seen in the table, where Object A has the highest temperature and pressure.

In order to determine which object has the fastest moving molecules, we would need to know the temperature of each object. The higher the temperature, the faster the molecules will be moving. Without this information, it is not possible to accurately answer the question.

Additionally, the table that is mentioned in the question is not included, so it is difficult to fully understand the question and provide an accurate answer. It is important to always provide complete and accurate information when asking a question in order to receive a correct and helpful answer.

Complementary question

Object A (250 K)

Object B (273 K)

Object C (217 K)

Object D (298 K)

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ANSWER:

STEP-BY-STEP EXPLANATION:

Answer:

true

Explanation:

as long as it is the right conductive material

One environmental disadvantage of using industrial scrubbers and electrostatic precipitators for pollution abatement is that they generate a large amount of solid waste, which needs to be disposed of safely. The coal ash collected by these devices can contain heavy metals and other pollutants, which pose a risk to human health and the environment if not managed properly.

Disposing of this waste in landfills can lead to contamination of soil and groundwater, while storing it on-site can create the risk of spills and releases. Additionally, the energy required to operate these devices can contribute to greenhouse gas emissions and climate change.

While industrial scrubbers and electrostatic precipitators can effectively collect particulate matter from coal-burning power plants, there are some environmental disadvantages associated with their use.

One major disadvantage is the production of waste materials that must be disposed of. Both types of pollution control systems produce waste materials that contain the collected particulate matter. These waste materials can be hazardous and require special handling and disposal procedures to prevent contamination of soil and water. If not properly disposed of, these waste materials can have negative impacts on the environment.

Overall, while industrial scrubbers and electrostatic precipitators can be effective at controlling particulate matter emissions from coal-burning power plants, there are significant environmental disadvantages that must be carefully considered in their use.

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La longitud final del puente de acero es 100.018 metros.

Asumamos que la dilatación térmica experimentada por el puente de acero es pequeña, de modo que podemos emplear la siguiente aproximación lineal para determinar la longitud final del puente de acero (\(L\)), en metros:

\(L = L_{o}\cdot [1+\alpha\cdot (T_{f}-T_{o})]\) (1)

Donde:

Si tenemos que \(L_{o} = 100\,m\), \(\alpha = 11.5\times 10^{-6}\), \(T_{o} = 8\,^{\circ}C\) y \(T_{f} = 24\,^{\circ}C\), entonces la longitud final del puente de acero es:

\(L = (100\,m)\cdot [1+(11.5\times 10^{-6})\cdot (24\,^{\circ}C - 8\,^{\circ}C)]\)

\(L = 100.018\,m\)

La longitud final del puente de acero es 100.018 metros.

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Answer:

B.because gravitational potential energy can convert to kinetic energy

Explanation:

You can calculate the speed as it hits the ground because gravitational potential energy can convert to kinetic energy.

In this way, total energy can be conserved.

Answer: B

Explanation:

The speed at which the driver must drive for the remaining time to complete the trip in the usual time is 61.25 miles per hour.

The total distance the driver should cover is 500 miles and this should be completed in 9 hours.

Based on the information provided, the regular speed is:

However, we know today he has covered 110 miles and he is 20 minutes late. This means, there are 390 miles to cover and the remaining time is 6.7 hours.

Based on this, let's calculate the new speed:

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Venn diagram should be titled traditional physics

Based on the Venn Diagram, Title 1 should be Quantum Mechanics, and Title 2 should be Traditional Physics.

A Venn Diagram is a diagram which shows the similarities as well as differences between two or more items.

Overlapping points show similarities while non-overlapping points show differences.

The Venn Diagram above illustrates Traditional physics and quantum mechanics.

Title 1 is quantum mechanics and Title 2 is Traditional physics.

Therefore, the Venn Diagram illustrates the difference and similarities between quantum physics and traditional physics.

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Vertical angle must be measured to an accuracy of approximately 0.00000698 radians to provide a relative accuracy of 1 in 50,000 for the horizontal line.

To determine the required accuracy for measuring the vertical angle, we can use the formula: Relative accuracy = (Vertical angle in radians) x (Horizontal distance)

First, we need to convert the vertical angle from degrees and minutes to radians. There are 60 minutes in a degree, so:

Vertical angle in degrees = 20°

Vertical angle in minutes = 00'

Total vertical angle in degrees = 20° + (00'/60) = 20.00°

Next, we convert the vertical angle to radians:

Vertical angle in radians = (Vertical angle in degrees) x (π/180)

Vertical angle in radians = 20.00° x (π/180) ≈ 0.3491 radians

Now, we can calculate the required accuracy for the horizontal line:

Relative accuracy = 1/50,000

Horizontal distance = Relative accuracy / Vertical angle in radians

Horizontal distance = (1/50,000) / 0.3491 ≈ 0.00000698 radians

Therefore, the vertical angle must be measured to an accuracy of approximately 0.00000698 radians to provide a relative accuracy of 1 in 50,000 for the horizontal line.

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Answer:

t = 1.75

t = 0.04

Explanation:

a)

For part 1 we want to use a kenamatic equation with constant acceleration:

X = 1/2*a*t^2

isolate time

t = sqrt(2X / a)

Plugin known variables. Acceleration is the force of gravity which is 9.8 m/s^2

t = sqrt(2*15m / 9.8m/s^2)

t = 1.75 s

b)

The speed of sound travels at a constant speed therefore we don't need acceleration and can use the equation:

v = d / t

isolate time

t = d / v

plug in known variables

t = 15m / 340m/s

t = 0.04 s

Explanation:

The reading on the scale is

W = m(g + a)

= (77 kg)(9.8 m/s^2 + 2 m/s^2)

= 908.6 N

Answer:

Derived quantities are quantities that are calculated from two or more measurements. Derived quantities cannot be measured directly. They can only be computed. Many derived quantities are calculated in physical science. Three examples are area, volume, and density.

Answer:

What is derive quantities​?

Derived quantities are those that may be expressed in terms of base or derived quantities by means of the mathematical symbols of multiplication and division only (no addition or subtraction or any other sign). ... The first group consists of derived quantities, which have proper units. Derived quantities are expressed as algebraic combinations of base quantities.

Examples of the Derive quantities

Derive Quantity and their units

Two similarities between electric and magnetic field lines are:
1. Direction: Both electric and magnetic field lines represent the direction of the force exerted on a charged particle or a magnetic pole.

Electric field lines originate from positive charges and terminate at negative charges, while magnetic field lines show the direction a north magnetic pole would move within the field.
2. Field strength: In both electric and magnetic fields, the field strength is proportional to the density of the field lines. More closely spaced lines indicate a stronger field, and the strength decreases as the lines become farther apart.
Two differences between electric and magnetic field lines are:
1. Origin and termination: Electric field lines originate from positive charges and terminate at negative charges, indicating the direction of the electric force.

Magnetic field lines, however, form closed loops, as they originate from the north pole of a magnet and terminate at the south pole, representing the continuous nature of the magnetic field.
2. Flux through a closed surface: For electric fields, the net electric flux through a closed surface is proportional to the total enclosed charge, as described by Gauss's Law.

In contrast, for magnetic fields, the net magnetic flux through any closed surface is always zero.

This is because magnetic field lines form closed loops, and there are no isolated magnetic poles (monopoles) in nature, which means that the magnetic field lines that enter a closed surface must also exit it.

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The statement "A spring loaded piston cylinder device is initially filled with 0.13 lbm" is false

. The mass of a substance is measured in kilograms (kg), not pounds (lbm). Therefore, the statement should be "A spring loaded piston cylinder device is initially filled with 0.13 kg." The pound-mass (lbm) is a unit of mass in the imperial system of measurement. The kilogram (kg) is a unit of mass in the International System of Units (SI). The SI is the most widely used system of measurement in the world. The mass of an object is the amount of matter it contains. The weight of an object is the force of gravity acting on it. The weight of an object changes depending on the strength of the gravitational field. The mass of an object does not change. In the statement "A spring loaded piston cylinder device is initially filled with 0.13 lbm," the mass of the substance is being described. The substance is being measured in pounds-mass, which is not a unit of mass in the SI system. Therefore, the statement is false. The correct statement would be "A spring loaded piston cylinder device is initially filled with 0.13 kg." This statement is true because the mass of the substance is being measured in kilograms, which is a unit of mass in the SI system.

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Answer:

Tt can be calculated by copy