a 13kg block is at rest on a level floor. A 400 g glob of putty is thrown at the block so that the putty travels horizontally, hits the block, at sticks to it. The block and putty slide 15cm along the floor. if the coefficient of sliding friction is 0.4, what is the initial speed of the putty

Answer:

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If no action is taken to address the issues evaluate whether the impact of light pollution radio interference and space debris on the field of astronomy is then a. likely to worsen

Astronomers already have a serious problem with light pollution from cities and other sources, which makes it more challenging to detect dim objects in the night sky. Light pollution is predicted to get worse unless action is taken to stop it as urbanisation grows and more artificial lights are installed.

Astronomical observations can be affected by radio interference from telecommunications, and unless steps are taken to reduce the issue, the issue is only going to become worse as the number of radio-emitting devices rises. In addition, astronomers' instruments and spacecraft are increasingly in danger from space debris. The probability of collisions and other accidents is anticipated to rise as the amount of trash in space continues to rise.

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Complete Question:

If no action is taken to address the issues evaluate whether the impact of light pollution radio interference and space debris on the field of astronomy is then -

a. likely to worsen

b. lessen or remain the same during the next 50 years

Answer:

The classification of that same issue in question is characterized below.

Explanation:

The given values are:

Current, I = 50.0 A

Diameter, d = 0.10 cm

(a)...

As we know,

⇒  Magnetic force = Copper wire's weight

So,

⇒   \(B\times I\times L=M\times g\)

On putting the estimated values, we get

⇒  \(B\times 50\times 1=7.037\times 10^{-3}\times 9.81\)

⇒  \(50B=69.03297\times 10^{-3}\)

⇒  \(B=1.38\times 10^{-3} \ T\)

(b)...

As we know,

⇒  \(m=\delta\times L\times \frac{\pi \ d^2}{4}\)

⇒      \(=8960\times 1\times \frac{\pi \ (0.001)^2}{4}\)

⇒      \(=2240\times \pi \ 0.000001\)

⇒      \(=7.037\times 10^{-3} \ kg\)

Momentum is P. p= mv. P = 0.15* 45= 6.75.

Momentum is a commonly used term in sports. A team that has the momentum is on the move and is going to take some effort to stop. A team that has a lot of momentum is really on the move and is going to be hard to stop.

Momentum is a physics term; it refers to the quantity of motion that an object has. A sports team that is on the move has the momentum. If an object is in motion (on the move) then it has momentum.

Momentum can be defined as "mass in motion." All objects have mass; so if an object is moving, then it has momentum - it has its mass in motion.

Therefore, Momentum is P. p= mv. P = 0.15* 45= 6.75.

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Answer: Solubility Rules

Explanation: I took it on Ap3x

(a) The angular speed of the rod, when it lands on the horizontal surface is 1.61 rad/s.

(b) The the angular acceleration of the rod, just before it touches the horizontal surface is 1.06 rad/s² .

The angular acceleration of the rod is calculated as follows;

Apply the principle of conservation of angular momentum;

τ = Iα

where;

τ = Fr = mg(L/2) cosθ

I = mL²/3

mg(L/2) cosθ =  mL²/3(α)

g(1/2) cosθ =  L/3(α)

(³/₂)g cosθ  = L(α)

(³/₂ L)g cosθ  = α

1.5Lg cosθ  = α

1.5(2.1) cos (70.4) = α

1.06 rad/s² = α

ωf² = ω₁² + 2αθ

ωf² = 0 + 2(1.06)(70.4π/180)

ωf² = 2.605

ωf = √2.605

ωf = 1.61 rad/s

Thus, the angular speed of the rod, when it lands on the horizontal surface is 1.61 rad/s.

The the angular acceleration of the rod, just before it touches the horizontal surface is 1.06 rad/s² .

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by using all the four type of parenting here is the descriptive answer which include 4 types of parenting by parents.

When a child queries the justification for a regulation, authoritarian parents are infamous for responding, "Because I said so," They are more concerned with obeying than they are with negotiating. Parental authority figures may substitute punishment for instruction. So instead of instructing a child on how to make better decisions

Parents who are authoritative put time and effort into avoiding behavioral issues before they arise. Additionally, they employ positive discipline techniques like reward and praise systems to reinforce good conduct.

Parents that are liberal with their children typically act more like friends than parents. They frequently encourage their kids to talk to them about their issues, but they typically don't make an attempt to discourage poor decisions or misbehavior because they are either uninvolved parents who don't understand how kids develop, or they are unaware of it.

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The deceleration of the body is -2 \(m/s^2\) (note the negative sign indicating that it is decelerating or slowing down).

Acceleration is the rate at which velocity changes over time, both in terms of speed and direction. A point or an object moving in a straight line is accelerated if it speeds up or slows down.

a) To find the deceleration of the body, we can use the formula:

Acceleration = (final velocity - initial velocity) / time

Since the body comes to rest after decelerating uniformly, the final velocity is 0.

The initial velocity is the speed at which the body was moving before it started decelerating, which is 10 m/s. The time taken to decelerate is 5 seconds.

Substituting these values in the above formula, we get:

Acceleration = (0 - 10) / 5

Acceleration = -2 m/s^2

Therefore, the deceleration of the body is 2 m/s^2 (note the negative sign indicating that it is decelerating or slowing down).

b) The total distance travelled by the body can be calculated as the sum of the distance covered during the constant speed phase and the distance covered during the deceleration phase.

During the constant speed phase, the distance covered is:

Distance = speed x time

Distance = 10 m/s x 10 s

Distance = 100 m

During the deceleration phase, the average speed can be calculated as the average of the initial and final speeds:

Average speed = (initial velocity + final velocity) / 2

Average speed = (10 m/s + 0) / 2

Average speed = 5 m/s

The distance covered during deceleration can be calculated using the formula:

Distance = average speed x time - (1/2) x acceleration x time^2

Substituting the values, we get:

Distance = 5 m/s x 5 s - (1/2) x \((-2 m/s^2)\) x \((5 s)^2\)

Distance = 25 m + 25 m

Distance = 50 m

Therefore, the total distance travelled by the body is:

Total distance = distance during constant speed + distance during deceleration

Total distance = 100 m + 50 m

Total distance = 150 m

Hence, the body travels a total distance of 150 meters.

Thus, this is the answer of the given scenario.

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The angle measured counterclockwise from the positive x-axis is θ = 50.4°

Here we know that the vector is:

V = < -177 cm, -214 cm>

To get the correspondent angle for this vector, we can think that this is the hypotenuse of a right triangle, such that the y-component and x-component are the cathetus.

Then, to get the angle (measured counterclockwise from the positive x-axis) is given by:

Tan(θ) = (opposite cathetus)/(adjacent cathetus)

Tan(θ) = (-214cm)/(-177 cm)

Using the inverse tangent function we get:

Atan(Tan(θ)) = Atan((-214cm)/(-177 cm))

θ = 50.4°

So the angle is 50.4°

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The speed of the roller coaster at the bottom of the hill if the track was frictionless is 34.04 m/s.

Given that the weight of the roller coaster is 2000 kg and the initial vertical drop of the ride is 59.3 m. We are to find the speed of the roller coaster at the bottom of the hill if the track was frictionless.We know that the roller coaster will lose potential energy due to the vertical drop. Assuming there is no friction, the potential energy will be converted into kinetic energy at the bottom of the hill.Considering the conservation of energy between the potential and kinetic energy, we can set the initial potential energy equal to the final kinetic energy. We can use the formula to calculate potential energy, which is PE = mgh where m = 2000 kg, g = 9.8 m/s², and h = 59.3 m. Therefore,PE = 2000 kg × 9.8 m/s² × 59.3 m = 1,157,924 JWe can use the formula to calculate kinetic energy, which is KE = 1/2mv² where m = 2000 kg and v is the final velocity. Therefore,KE = 1/2 × 2000 kg × v².The total energy remains constant as we know there is no friction. Therefore the final kinetic energy will be equal to the initial potential energy,1,157,924 J = 1/2 × 2000 kg × v²v² = (2 × 1,157,924 J) / 2000 kgv² = 1157.924v = √1157.924v = 34.04 m/s.

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Answer: 2nd choice--electrons are able to move freely ...

Explanation:

Metals are good conductors of electricity because at least 1 electron per metal atom is free, meaning it is not tied to any particular metal atom, but is able to move freely throughout the metal.  Electrical current is the flow of electrons.

Answer:

(A) 4* 6 ^ ⁻6 T m² (B) 2 * 10 ^ ⁻6 v

Explanation:

Solution

Given that:

A refrigerator magnet about = 2 mm

The estimated magnetic field strength of the magnet is = 5 m T

The Area = 8 cm²

Now,

(A) The magnetic flux ΦB = BA

Thus,

ΦB  = (5 * 10^⁻ 3) ( 4 * 10 ^⁻2) * ( 2 * 10^ ⁻2) Tm²

So,

ΦB =  4* 6 ^ ⁻6 T m²

(B)By applying Faraday's Law we have the following formula given below:

Ε = Bℓυ

Here,

ℓ = 2 cm the same as 2 * 10 ^⁻2 m

B = 5 m T = 5 * 10 ^ ⁻3 T

υ = 2 cm/s  = 2 * 10 ^ ⁻2 m/s

Thus,

Ε = (5 * 10 ^ ⁻3 T) *  (2 * 10 ^ ⁻2) (2 * 10 ^ ⁻2) v

E =2 * 10 ^ ⁻6 v

A) The magnetic flux ΦB into the refrigerator door behind the magnet :

B) The estimated emf induced under the rectangle on the door's surface ;

Given data :

magnetic field strength of magnet ( B )  = 5 mT

size of refrigerator magnet = 2 mm

Area of magnet ( A )  = 4 * 2 = 8 cm²

where ; ΦB  = BA

ΦB = ( 5 * 10⁻³ ) * ( 4 * 10⁻² ) * ( 2 * 10⁻² ) Tm²

      =  4 * 6⁻⁶ Tm²

To determine the estimated emf we will apply Faraday's law

Ε = Bℓυ ---- ( 2 )

where : B = 5 * 10⁻³ T,  ℓ = 2 * 10⁻² m,  υ = 2 * 10⁻² m/s

insert values into equation 2

E = ( 5 * 10⁻³ ) * ( 2 * 10⁻² ) * ( 2 * 10⁻² )

  = 2 * 10⁻⁶ v

Hence we can conclude that The magnetic flux ΦB is 4 * 6⁻⁶ Tm² and The estimated emf induced is  2 * 10⁻⁶ v

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Answer:

upward thrust, makes the rocket go up

and kentic energy, you swing and the energy that was built up before you hit the ball was transferred

Explanation:

The magnitude of the impulse of the truck is equal to 4000 Kg.m/s.

Impulse can be described as the integral of a force over the time interval for which it acts. Impulse is also a vector quantity since force is a vector quantity. Impulse can be applied to an object that generates an equivalent vector change in its linear momentum.

The S.I. unit of impulse is N⋅s and the dimensionally equivalent unit of momentum is kg⋅m/s. A resultant force gives acceleration and changes the velocity of an object for as long as it acts.

Given the mass of the truck, m= 2000 Kg

The initial speed of the truck, u = 6 m/s

The final speed of the truck, v = 4 m/s

The change in the linear momentum is equal to the impulse.

I = ΔP = mv - mu

I = 2000 ×4 - 2000 × 6

I = 8000 - 12000

I = - 4000  Kg.m/s²

Therefore, the magnitude of the impulse is  4000 Kg.m/s².

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A 66.1-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then drops through a height of 1.59 m, and ends with a speed of 8.51 m/s. The nonconservative work done on the boy is approximately -42.7 kilojoules.

To find the nonconservative work done on the boy, we need to consider the change in the boy's mechanical energy during the process. Mechanical energy is the sum of the boy's kinetic energy (KE) and gravitational potential energy (PE).

The initial mechanical energy of the boy is given by the sum of his kinetic energy and potential energy when he catches the wave:

E_initial = KE_initial + PE_initial

The final mechanical energy of the boy is given by the sum of his kinetic energy and potential energy after he drops through the height:

E_final = KE_final + PE_final

The nonconservative work done on the boy is equal to the change in mechanical energy:

Work_nonconservative = E_final - E_initial

Let's calculate each term:

KE_initial = (1/2) * m * v_initial^2

= (1/2) * 66.1 kg * (1.60 m/s)^2

PE_initial = m * g * h_initial

= 66.1 kg * 9.8 m/s^2 * 1.59 m

KE_final = (1/2) * m * v_final^2

= (1/2) * 66.1 kg * (8.51 m/s)^2

PE_final = m * g * h_final

= 66.1 kg * 9.8 m/s^2 * 0

Since the boy ends at ground level, the final potential energy is zero.

Substituting the values into the equation for nonconservative work:

Work_nonconservative = (KE_final + PE_final) - (KE_initial + PE_initial)

Simplifying:

Work_nonconservative = KE_final - KE_initial - PE_initial

Calculating the values:

KE_initial = (1/2) * 66.1 kg * (1.60 m/s)^2

PE_initial = 66.1 kg * 9.8 m/s^2 * 1.59 m

KE_final = (1/2) * 66.1 kg * (8.51 m/s)^2

Substituting the values:

Work_nonconservative = [(1/2) * 66.1 kg * (8.51 m/s)^2] - [(1/2) * 66.1 kg * (1.60 m/s)^2 - 66.1 kg * 9.8 m/s^2 * 1.59 m]

Calculating the result:

Work_nonconservative ≈ -42.7 kJ

Therefore, the nonconservative work done on the boy is approximately -42.7 kilojoules. The negative sign indicates that work is done on the boy, meaning that energy is transferred away from the boy during the process.

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The correct statement is " A dry cell battery has magnetic properties.", The correct option is C.

A dry cell battery does generate its own magnetic field due to the flow of electric current through the battery.

The magnetic field is created by the movement of charged particles (electrons) within the battery. This magnetic field is relatively weak and is not typically strong enough to be used for practical applications outside of the battery itself.

So, the magnetic properties of the dry cell battery are important for understanding its behavior within an electrical circuit.

Therefore, The correct answer is option C.

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Answer:

Conduction

Explanation:

conduction is one of the three main ways that heat energy moves from place to place the other two ways heat moves around our radiation and convection conduction is the process by which heat energy is transmitted through Collisons between neighboring atoms or molecules.

hope this helps :)

Answer:

A

Explanation:

Answer:

H = V t - 1/2 g t^2       V =vertical speed  up and g is directed downwards

40 = 30 t - 5 t^2

8 = 6 t - t^2     divide by 5

t^2 - 6 t + 8 = 0

[6 +- (36 - 32)^1/2 ] / 2 = 2 or 4

Check (4 will mean the ball has reached max height and is moving down)

H = 30 * 4 - 5 * 16 = 120 - 80 = 40 m  

2 of course will be the correct answer  (6 - 2) / 2 = 2

H = 30 * 2 - 5 * 4 = 40 m

The effort distance of a lever should be increased to lift a heavier load because it provides a mechanical advantage, allowing for easier lifting of the load.

The effort distance of a lever should be increased to lift a heavier load because it allows for a mechanical advantage that compensates for the increased weight.

In a lever system, the effort distance is the distance between the point of application of the input force (effort) and the fulcrum, while the load distance is the distance between the point of application of the output force (load) and the fulcrum. The mechanical advantage of a lever is determined by the ratio of the load distance to the effort distance.

By increasing the effort distance, the mechanical advantage of the lever system is increased. This means that for the same input force (effort), a greater output force (load) can be achieved. When dealing with a heavier load, a higher mechanical advantage is required to overcome the increased resistance.

By increasing the effort distance, the lever system can effectively multiply the applied force, making it easier to lift the heavier load. This allows for the redistribution of force and facilitates the efficient use of human effort in various applications, such as in construction, engineering, and even everyday tools like scissors and pliers.

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Answer:

Um capacitor é um dispositivo que armazena energia elétrica em um campo elétrico em virtude do acúmulo de cargas elétricas em duas superfícies próximas isoladas uma da outra. É um componente eletrônico passivo com dois terminais. O efeito de um capacitor é conhecido como capacitância.

Explanation:

em outras palavras, sua letra c

Answer:

D

Explanation:

In a series circuit there is only one path for the current to complete the path....so D

While the three stable isotopes of Argon share the same number of protons and electrons, they differ in their atomic masses due to varying numbers of neutrons.

This means they have identical electron configurations and chemical properties. Additionally, they all have the same number of electrons, 18, which determines their chemical behavior and bonding capabilities.

However, the isotopes differ in their neutron numbers, which gives rise to their atomic masses. Argon-36 has 18 protons and 18 neutrons, Argon-38 has 18 protons and 20 neutrons, and Argon-40 has 18 protons and 22 neutrons.

This variation in neutron count leads to differences in atomic mass. Consequently, the isotopes exhibit different atomic weights, with Argon-36 having a mass of approximately 36 atomic mass units (amu), Argon-38 around 38 amu, and Argon-40 approximately 40 amu.The differing atomic masses affect the isotopes' physical properties.

For instance, the isotopes may have different boiling points, melting points, or densities due to variations in the average mass of their atoms. These subtle differences are relevant in scientific research, especially in fields like geochronology and radiometric dating, where the abundance ratios of these isotopes are utilized to determine the age of rocks and minerals.

In summary,  These differences give rise to variations in their atomic weights and physical properties.

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A student sets up four cups with 40 mL of water in each and adds different amounts of ice to each cup.

To determine the connection between the temperature change and the transfer of kinetic energy, the student can measure the initial and final temperatures of the water in each cup and the mass of the ice added to each cup. Then, the student can use the following equation to calculate the amount of heat transferred from the ice to the water

Q = m × c × ΔT

Where Q is the amount of heat transferred, m is the mass of the ice added, c is the specific heat capacity of water (4.184 J/g °C), and ΔT is the change in temperature of the water.

The student can then compare the amount of heat transferred from the ice to the water in each cup to the change in temperature of the water. If the temperature change is greater in a cup where more heat was transferred, this suggests a direct connection between the transfer of kinetic energy (as heat) from the ice to the water and the temperature change of the water.

Hence, This can be further supported by calculating the temperature change per unit of heat transferred, which should be approximately the same for each cup if there is a direct connection between the transfer of heat and the temperature change.

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1) The starting temperature of the gas is 288 K

b) When the pressure is doubled, the temperature is 576 K

We know that we have to use the ideal gas equation so as to be able to obtain the temperature of the starting of the gas and we know that;

Pressure = 200 kPa or 1.97 atm

Volume =  3000 cm3  or 3 L

Temperature = ?

Number of moles = mass/molar mass = 7 g/28 g/mol = 0.25 moles

Then we have;

PV = nRT

T = PV/nR

T =  1.97 * 3/0.25 * 0.082

T = 5.91/0.0205

T = 288 K

If the pressure doubles and we have;

P1/T1 = P2/T2

P1T2 = P2T1

T2 = 2(1.97) * 288/1.97

T2 = 576 K

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Answer:

Explanation:

25318349

The mass of the block is 8 kg.

When the force exerted on an item and its acceleration are known, the mass of the object can be calculated using the formula

mass = force/acceleration.

It is derived from the second law of motion, which states that an object's acceleration is inversely proportional to its mass and directly proportional to the force acting on it. So, using this formula, we can determine an object's mass if we know its force and acceleration.

We can use the formula:

F = ma

where F is the net force, m is the mass of the block, and a is the acceleration.

We know that the net force is 32 N and the acceleration is 4.0 m/s². Substituting these values into the formula, we get:

32 N = m × 4.0 m/s².

Solving for m, we divide both sides of the equation by 4.0 m/s².

m = 32 N / 4.0 m/s².

m = 8 kg

Therefore, the mass of the block is 8 kg.

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Answer:

1.01 m/s

Explanation:

Given

initial speed, u = 1.8m/s

acceleration, a = -3.00m/s² (it's negative because the skater slowed down)

distance, s = 0.37m

Required

Determine the final velocity (v)

This will be solved using the following equation of motion

\(v\² = u\² + 2as\)

Substitute values for u, a and s

\(v\² = 1.8\² + 2 * -3 * 0.37\)

\(v\² = 3.24 - 2.22\)

\(v\² = 1.02\)

Take square roots

\(v = \sqrt{1.02\)

\(v = 1.00995049384\)

\(v = 1.01 m/s\) (Approximated)

The final speed of the skater when she has slid 0.37 m is 1.0 m/s.

The given parameters:

The final speed of the skater when she has slid 0.37 m is calculated as follows;

\(v_f^2 = v_i^2 + 2ad\\\\v_f ^2 = 1.8^2 + 2(3)(-0.37)\\\\v_f^2 = 1.02\\\\v_f = \sqrt{1.02} \\\\v_f = 1.0 \ m/s\)

Thus, the final speed of the skater when she has slid 0.37 m is 1.0 m/s.

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Answer:

Physics, or the study of matter, energy, and the interactions between them, helps us to understand the laws and rules that govern the physical world. Not every student will grow up and study physics on a deeper level, but everyone uses basic physics concepts to navigate everyday life.A

Physics is a natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force. More broadly, it is the study of nature in an attempt to understand how the universe behaves.Physics helps you to understand the world around you, and satisfy your curiosity. Studying physics develops your critical thinking and problem-solving skills. Physicists are versatile, which opens a wide range of future careers.