The voltage of a DC supply always _____________.
A. Points in opposite directions
B. Does not point in any direction
C. Points in various directions
D. Points in the same direction

Answer:

(1.) (A.) wight

Explanation:

Answer:

mass

step by step Explanation:

1. A.

Answer:

the first one stationary charge

first oneeeeeeeeeeeeeeeeeeee

Answer:

Explanation:

Looking at the left string node

sum vertical forces to zero

T₁cos35 - 40 = 0

T₁ = 40/cos35 = 48.83 N

Sum horizontal forces to zero

T₂ - T₁sin35 = 0

T₂ = 48.83sin35 = 28.01 N

Now consider the right string node

Sum horizontal forces to zero

T₃sinθ - T₂ = 0

Τ₃ = T₂/sinθ

sum vertical forces to zero

 T₃cosθ - 50 = 0

(T₂/sinθ)cosθ = 50

          T₂cotθ = 50

              cotθ = 50/28.01

                   θ = 29.256067...°

                   θ = 29°

Τ₃ = T₂/sinθ

Τ₃ = 28.01/sin29.256067

Τ₃ = 57.3102...

Τ₃ = 57 N

Answer:

the greater the height of an object the *greater* its gravitational potential energy

greater

Answer:

44°

Explanation:

Look for the longest distance under the 'Distance ' column....look to the left to find the corresponding angle

  Table clearly shows that the longest distance (133 ft) occurs at angle of 44°

The earthquake would occur 13 minutes before 10:05 a.m. which will be at 9.52 am.

The p-waves travel with a constant velocity of 7 km/s

The time can be calculated by using the formula

t = d / v

where

T1 =  10:05 a.m

d is the distance they take to travel from the epicenter

v is the speed of the p-waves

On average, the speed of p-waves is

v = 7 km/s

d = 5600 km (given)

Substituting the values in the formula;

t = d / v

t = 5600 ÷ 7

t = 800 seconds

Converting into minutes,

t = 800 ÷ 60

t = 13.3

≈ 13 mins

T1 -  13 mins = T2

10:05 - 13 mins = 9.52 am

It means the earthquake occurred prior 13 minutes, that is at 9.52 am.

Therefore, the earthquake occurred at 9.52 am.

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Answer:

sphere, disk, hoop

Explanation:

See attached file

Older adults have greater freedom to pursue interests, to use time, to think, and to reflect is not positive aspects of aging.

Early adulthood is the beginning of a long, ongoing process of natural change called aging. Many body processes start to gradually deteriorate in the early middle years. At no particular age do people become old or elderly. Old age has traditionally been defined as commencing at age 65.

Oxidative stress, glycation, telomere shortening, adverse responses, mutations, and protein aggregation are a few of the factors that contribute to aging.

Positive aspects of aging except older adults have greater freedom to pursue interests, to use time, to think, and to reflect.

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The car is moving at approximately 12.5 meters per second.

The kinetic energy (KE) of an object can be calculated using the formula:

KE = 1/2 * m * \(v^2\)

where

KE = kinetic energy,

m =Mass of the object, and

v = velocity.

In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .

Substituting the  values , we have:

125,000 J = 1/2 * 1600 kg *\(v^2\)

Now, we can solve for v by rearranging the equation:

\(v^2\) = (2 * 125,000 J) / 1600 kg

\(v^2\) = 156.25 \(m^2/s^2\)

Taking the square root, we find:

v = √156.25\(m^2/s^2\)

v ≈ 12.5 m/s

Therefore, the car is moving at approximately 12.5 meters per second.

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The Earth’s age was established to be about 4.6 billion years ago using radiometric dating which is an example of an absolute age because the age in years has been calculated is true.

Scientists have been studying ancient Earth to establish an accurate timeline of its formation and the evolution of all life. They have used several types of methods to determine the ages of materials. There are two main categories by which this is done relative age dating and absolute age dating. Relative age dating refers to the study of a material and its comparison to other similar materials to establish a timeline. Absolute age dating method refers to a method of measuring how old a natural material is in years. In other words, the absolute age of an Earth material is to determine how old it actually is in years. It is sometimes called a calendar age. Using radiometric dating, scientists have established the age of Earth to be 4.6 billion years which is an example of an absolute age.

Note: The question is incomplete as it is missing options which are A) True B) False.

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Answer:

Magnetic fields exist near a magnet, farther away from a magnet, and within a magnet.

So, the answer is D. All of the above.

Let me know if this helps!

The largest mass of cargo the balloon can lift is 791.06 kg

First, we need to calculate the mass of helium.

Since the radius of the spherical balloon is r = 7.15 m, its volume is V = 4πr³/3.

The volume of the balloon also equals the volume of helium present.

Now, the mass of helium m = density of helium, ρ × volume of helium, V

m = ρV

Since ρ = 0.179 kg/m³

m = ρV

m = ρ4πr³/3.

m = 0.179 kg/m³ × 4π(7.15 m)³/3

m = 0.179 kg/m³ × 4π(365.525875 m³)/3

m = 0.179 kg/m³ × 1462.1035π m³/3

m = 261.7165265π/3 kg

m = 822.207/3 kg

m = 274.07 kg

Since the mass of the skin and structure of the balloon is 910 kg, the total mass, M of the balloon = mass of skin and structure + mass of helium gas is 910 kg + 274.07 kg = 1184.07 kg.

The weight of this mass W = Mg where g = acceleration due to gravity.

The buoyant force on the balloon due to the air is the weight of air displaced, W' = mass of air, m' × acceleration due to gravity, g.

W' = m'g

Now, the mass of air m' = density of air, ρ' × volume of air displaced, V'

We know that the volume of air displaced, V' = volume of balloon, V

So, V' = V = 4πr³/3.

Since the density of air, ρ' = 1.29 kg/m³,

m' = ρ'V

m = 1.29 kg/m³ × 4π(7.15 m)³/3

m = 1.29 kg/m³ × 4π(365.525875 m³)/3

m = 1.29 kg/m³ × 1462.1035π m³/3

m = 1886.113515π/3 kg

m = 5925.4/3 kg

m = 1975.13 kg

So, the net weight W" that the balloon can lift is W" = W' - W = m'g - Mg = (m' - M )g = (1975.13 kg - 1184.07 kg)g = 791.06g.

So, the net mass m" = W"/g = 791.06g/g = 791.06 kg

This net mass is the largest mass of cargo that the balloon can lift.

Thus, the largest mass of cargo the balloon can lift is 791.06 kg

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Answer: My bad bro. Just tryna get me some points g

Explanation: tuff

Answer:

Explanation:

D=s*t

D=(20)(45)

D=900m.

hope it helps

When a typical comet in the Oort cloud is only 1 km in diameter, then the mass of the Oort cloud is changes to  4.18×10⁹ kg.

The mass of each comet int he Oort cloud is,

mass = density × Volume

volume of sphere = 4/3(π×r²) where, r = radius of the sphere

From the given,

diameter = 1 km

radius = Diameter / 2 = 1/2(D)

Volume of the comet = 4/3 (π×r²) = 4/3 (π× (1/2 (10)³)²)

                                   = 4/3×(π) ×(1/8×10⁶)

Mass = density  × volume, where density = 1000 kg/m³

         = 1000  × 4/3×(π) ×(1/8×10⁶)

        = 4.18 ×10⁹ kg

When the typical comet in the Oort cloud is only 12 km in diameter the mass of Oort cloud is 4.18×10⁹ kg.

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a. The student's final position is 100.5 meters at an angle of 25.2° north of east from her initial position and b. The student would have to head in the direction of 334.8° south of east to return to her initial position.

a. To find the student's final position, we can use vector addition. We can start by breaking each displacement vector into its x- and y-components. First displacement (70 m at 37° north of east),

x-component = 70 cos(37°) = 56.02 m

y-component = 70 sin(37°) = 42.49 m

Second displacement (82 m at 20° south of east),

x-component = 82 cos(-20°) = 78.72 m

y-component = 82 sin(-20°) = -28.12 m

Third displacement (28 m at 30° west of north),

x-component = 28 sin(30°) = 14 m

y-component = 28 cos(30°) = 24.24 m

We can add the x-components and y-components separately to get the total displacement,

x-displacement = 56.02 m + 78.72 m - 14 m = 120.74 m

y-displacement = 42.49 m - 28.12 m + 24.24 m = 38.61 m

The magnitude of the total displacement is,

|d| = √(x-displacement² + y-displacement²)

|d| = √(120.74² + 38.61²)

|d| = 126.0 m.

The direction of the total displacement can be found using the inverse tangent function,

θ = atan(y-displacement/x-displacement)

θ = atan(38.61/120.74)

θ = 17.4° north of east. Therefore, the student's final position is 126.0 m at 17.4° north of east.

b. To return to her initial position, the student would need to walk the same distance and direction as her total displacement but in the opposite direction. The opposite direction of 17.4° north of east is 162.6° south of west. Therefore, she would need to walk 126.0 m at 162.6° south of west to return to her initial position.

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Answer:

Despite the fact that Joule's experiment failed, he accomplished a great deal. He developed a connection between the flow of current through a resistance and the heat produced. He is also credited with the first measurement of a gas molecule's velocity. For his experimental researches on the dynamical theory of heat, he was awarded a medal.

Explanation:

(0.43 ± 0.08)m/s is the speed of the ball.

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is traveling along a path. Speed can be thought of as the rate at which an object travels a distance, and it is a scalar quantity that denotes "how rapidly an object is traveling."

A fast-moving object travels at a high speed and completes a significant distance in a brief period of time. This is in contrast to an object traveling slowly, which travels a relatively short distance in the same length of time. Zero speed refers to an object that is not moving at all.

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Answer:

Explanation:

In the microscopic world of quantum mechanics, particles don't behave like familiar everyday objects. They can exist in multiple states simultaneously and behave as both particles and waves. When we try to measure or observe a particle, we typically use light or other particles to interact with it. However, this interaction can disturb the particle's state. Imagine trying to measure the position of an electron using light. Light consists of photons, and when photons interact with the electron, they transfer energy to it. This energy exchange causes the electron's position and momentum to become uncertain. The more precisely we try to measure its position, the more uncertain its momentum becomes, and vice versa. This is known as the Heisenberg uncertainty principle.

So, the act of observing a particle disturbs its state because the interaction between the observer and the particle affects its properties. The very act of measurement or observation introduces a level of uncertainty and alters the particle's behavior. It's important to note that this behavior is specific to the quantum world and doesn't directly translate to the macroscopic world we experience in our daily lives. Quantum mechanics operates at extremely small scales and involves probabilities and uncertainties that are not typically noticeable in our macroscopic observations.

The energy efficiency of the car is approximately 16.7%.

The energy efficiency of a car is the ratio of the useful work output (in this case, the kinetic energy of the car) to the total energy input (in this case, the energy released by burning the gasoline). The equation for energy efficiency is:

The useful work output can be calculated as the kinetic energy of the car using the equation:

where m is the mass of the car and v is its velocity.

Substituting the given values:

The total energy input is the energy released by burning 0.1 L of gasoline, which is:

Substituting these values into the equation for efficiency:

Therefore, the energy efficiency of the car is approximately 16.7%.

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The kinetic energy of the flywheel after 1 minute of rotation, given that it has a mass of 50 and radius of 40 cm is 32.4 KJ (Option D)

We'll begin by obtaining the velocity of the flywheel. This is shown below:

v = at

v = 0.6 × 60

v = 36 m/s

Finally, we shall determine the kinetic energy of the flywheel. Details below:

KE = ½mv²

KE = ½ × 50 × 36²

KE = 25 × 1296

KE = 32400 J

Divide by 1000 to express in KJ

KE = 32400 / 1000

KE = 32.4 KJ

Thus, the kinetic energy is 32.4 KJ (Option D)

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Hamilton's equations of motion are a set of equations that describe the dynamics of a classical mechanical system in terms of a generalized coordinate and its conjugate momentum.

The equations are derived from the Hamiltonian formalism. Hamilton's equations can be derived from the Hamilton's principle, which is a variational principle that states that the action of a dynamical system is stationary.

To derive these equations, we start with the Hamiltonian function H(p, q) and use the principle of least action. The action S is defined as the integral of the Lagrangian L(q, q', t) over time:

S = ∫[L(q, q', t)] dt

To find dp/dt, we differentiate the Lagrangian with respect to q:

∂L/∂q = ∂(p * q' - H)/∂q

= -∂H/∂q

Using the chain rule, we find:

dL/dt = (∂L/∂q) * dq/dt + (∂L/∂q') * dq'/dt

= -∂H/∂q * dq/dt + p * d(q')/dt

= -∂H/∂q * dq/dt + p * d^2q/dt^2

= -∂H/∂q * dq/dt + dp/dt

Since the Lagrangian is equal to p * dq' - H, we can write:

dL/dt = -∂H/∂q * dq/dt + dp/dt

From the principle of least action, we know that the action S is stationary, so dL/dt = 0. Thus, we have:

-∂H/∂q * dq/dt + dp/dt = 0

Rearranging the equation, we obtain the first equation of motion:

dp/dt = -∂H/∂q

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Blocks of colored instructions are connected to create programs. Scripts are the name for these collection of blocks. They direct on-screen characters in what to do.

Motion can be characterized as a shift in an object's location with regard to time. Motion can be heard in a variety of sounds, such a book sliding off a table, water running from a faucet, rattling windows, etc. There is motion even in the air we breathe! The universe is a moving thing.

Delete your calendars, task lists, and project management software. Motion uses AI to schedule your day and the days of your team! Your projects, tasks, and meetings are required.

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The average force exerted by the golf club on the golf ball is equal to 1769.2N.

Force acting on an object can be described as the influence that changes the state of the object of motion or rest. The S.I. unit of force is Newton (N) and force is a vector parameter.

The mathematical formula of the 2nd law of motion for force is written as follows:

F = ma

Given the mass of the ball, m= 0.046 Kg

The golf club was in contact with the ball for time, t = 1.3 ms = 1.3 ×10⁻³s

The speed of the golf ball, v = 50 m/s

We know that, equation of motion: \(v = u + at\)

50 = 0  + a (1.3 ×10⁻³)

a = 38.46 ×10³ m/s²

The average force on the golf ball will be:

F = ma = 0.046 ×38.46 ×10³

F = 1769.2 N

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The final velocity of the truck after collision, given that the car and the truck interlock and move together is 11.25 m/s west (Option A)

The final velocity of the truck after the collision can be obtained as illustrated below:

Momentum before = momentum after

m₁u₁ + m₂u₂ = v(m₁ + m₂)

(1500 × 20) - (2500 × 30) = v(1500 + 2500)

30000 - 75000 = v × 4000

-45000 = v × 4000

Divide both sides by 4000

v = -45000 / 4000

v = -11.25 m/s

Recall => West is negative

v = 11.25 m/s west

Thus, the final velocity is 11.25 m/s west (Option A)

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Answer:

by potential difference and electron gun

Explanation:

a magnetic field is produced whenever an electrical charge is in motion. The spinning and orbiting of the nucleus of an atom produces a magnetic field as does electrical current flowing through a wire. The direction of the spin and orbit determine the direction of the magnetic field.

Answer:

Electromagnetic field can be produced by the superposition of electric field and magnetic field.

Explanation:

When two or waves propagate in a medium without affecting each other , then at any instant the displacement of a particle will be equal to the vectorial sum of the displacements due to the waves.

Hence Electromagnetic field can be produced by L-C CIRCUITS.

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Answer:

A. 13 cm

Explanation:

here the total diameter is given 4 cm,

here the radius then will be 2 cm.

use the formula of circumference of circle = 2πr ........where r is the radius

using the formula: 2 * π * 2 = 4π = 12.57 = 13 cm.

Answer:

The maximum radius of curvature of the bump is approximately 14.5 meters.

Explanation:

To calculate the maximum radius of curvature of the bump, we need to use the centripetal force equation:

F = mv²/r

where F is the force required to keep the car moving in a circle of radius r, m is the mass of the car, and v is the speed of the car.

At the instant when the car loses contact with the road, the normal force between the car and the road becomes zero. Therefore, the centripetal force required to keep the car moving in a circle is provided entirely by the force of gravity acting on the car.

The maximum radius of curvature occurs when the centripetal force required to keep the car moving in a circle is equal to the force of gravity acting on the car.

The force of gravity acting on the car is given by:

Fg = mg

where g is the acceleration due to gravity (9.81 m/s²).

Therefore, we can set F = Fg and solve for r:

mv²/r = mg

r = v²/g

Substituting the given values, we get:

r = (12 m/s)² / 9.81 m/s²

r ≈ 14.5 meters

Therefore, the maximum radius of curvature of the bump is approximately 14.5 meters.

At point P, the electric potential is 0. This is due to the fact that the positive and as a result, at point P, their electric potentials are cancelled.

Positive and negative electrical charges are referred to as opposite forms of charge. A positively charged object will draw a negatively charged object, in accordance with our core concept of charge interaction.

We can apply the following equation to find the electric potential at point P: V = kQ/r1 - kQ/r2.

where:

k = Coulomb's constant (9 x 10⁹ N m²/C²),Q = magnitude of the charge (3.3 μC = 3.3 x 10⁻⁶ C), r1 = distance from the positive charge to point P (a = 0.35 m), r2 = distance from the negative charge to point P (a = 0.35 m)

Using these values, we can calculate the potential at point P as follows:

V = (9 x 10⁹ N m²/C²) * (3.3 x 10⁻⁶  C) / (0.35 m) - (9 x 10⁹ N m²/C²) * (3.3 x 10⁻⁶ C) / (0.35 m)

V = 0.

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Answer:

The correct answer is B) X Plane

Explanation:

Polarisation Direction that is the oscillation of electric field for both the antennas that are transmitting and receiving antenna must be same.  

The polarization of the antenna is the orientation of the radio wave electric field emitted by it, which is determined by the mechanical arrangement and alignment of the antenna. Vertical polarization would be created by an antenna whose conductor is structured linearly and oriented vertically.

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