when electric charges move through a conductor, which two fields form?

A. a field that is parallel to the flow of charges

B. a field that is perpendicular to the flow of charges

C. a magnetic field

D. an electric field

Answer:

um .... D. D D D D D this should be it

the fossil informed us about the climatic and geographical changes that occurs in the environment over time.

We can infer about the climate and geographical changes in the environment over time at the mystery fossil dig site because the fossil provides us information about the climatic condition as well as the geography of land when this fossil organism were alive.

So we can conclude that the fossil informed us about the climatic and geographical changes that occurs in the environment over time.

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The filament's diameter will be reduced by 9.1% when an old light bulb draws only 52.3 W instead of its original 60.0 W due to evaporative thinning of its filament.

When an old light bulb draws only 52.3 W instead of its original 60.0 W, the reason behind it is due to evaporative thinning of its filament. To calculate the factor by which the diameter of the filament is reduced, we will use the following formula; W α (diameter)2Lwhere, W = Power, L = Length, and α is a constant.The constant α is independent of the diameter of the filament. Therefore, \frac{W 1}{ W 2} =\frac{ (\frac{diameter 1 }{ diameter 2} )2L1 }{ L2}. Here, W1 = 60.0 W (original power of the light bulb), W2 = 52.3 W (new power), and L1 = L2 (uniform thinning of the filament).Now, we can find the diameter of the filament using the following formula;diameter 2 = diameter 1 sqrt{(\frac{W1 }{ W2} )}= diameter 1 sqrt{(\frac{60.0 }{ 52.3})}.This formula helps to find the diameter of the filament when the power of the light bulb is reduced due to evaporative thinning of its filament.The new diameter of the filament will be; Diameter 2 = 0.909 Diameter 1Therefore, the diameter of the filament has been reduced by 9.1% (approximately 0.909 times of its original diameter).

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Answer:

1.An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force.

3.Let speed of balls are v

1

and v

2

.

There is no external force acting, momentum will be conserved.

m

1

u

1

+m

2

u

2

=m

1

v

1

+m

2

v

2

⇒m×6−m×6=mv

1

+mv

2

⇒v

1

=−v

2

Coefficient , e=−

u

1

−u

2

v

1

−v

2

⇒

3

1

=−

6+6

v

1

−v

2

⇒v

1

=−2m/sWhen two objects with the same mass collide, Newton's laws tell us that they will accelerate the same amount but in opposite directions.

Collision Forces - 5/5

1. A) Motion will be either created, stopped or changed.

2. D) 5,208 N

3. B) the mass and acceleration of each person

4. C) balanced forces

5. B) 13.125 N to the right

Hope this helps ya out peeps!

According to the Stefan-Boltzmann law, the luminosity of a star is directly proportional to the fourth power of its temperature and its radius squared.

The formula for luminosity is:L = 4πR²σT⁴where L is the luminosity, R is the radius, T is the temperature, and σ is the Stefan-Boltzmann constant (5.67 × 10⁻⁸ W/m²K⁴).To determine which stars would have the same luminosity as the sun, we need to compare their luminosity values using the given data. The radii and temperatures of five stars compared to the sun are as follows:Star A: R = 2R⊙, T = 6000 KStar B: R = R⊙, T = 3000 KStar C: R = 0.1R⊙, T = 6000 KStar D: R = 10R⊙, T = 3000 KStar E: R = 2R⊙, T = 15000 KSubstituting the values in the formula, we get:L⊙ = 4π(1²)(5.67 × 10⁻⁸)(5778⁴) ≈ 3.828 × 10²⁶ Wm¹²Star A: L = 4π(2²)(5.67 × 10⁻⁸)(6000⁴) ≈ 1.84 × 10³³ Wm¹²Star B: L = 4π(1²)(5.67 × 10⁻⁸)(3000⁴) ≈ 6.86 × 10²⁹ Wm¹²Star C: L = 4π(0.1²)(5.67 × 10⁻⁸)(6000⁴) ≈ 6.95 × 10²³ Wm¹²Star D: L = 4π(10²)(5.67 × 10⁻⁸)(3000⁴) ≈ 5.48 × 10³⁴ Wm¹²Star E: L = 4π(2²)(5.67 × 10⁻⁸)(15000⁴) ≈ 5.12 × 10³³ Wm¹²

The luminosity values of the stars are as follows:Star A: L ≈ 1.84 × 10³³ Wm¹²Star B: L ≈ 6.86 × 10²⁹ Wm¹²Star C: L ≈ 6.95 × 10²³ Wm¹²Star D: L ≈ 5.48 × 10³⁴ Wm¹²Star E: L ≈ 5.12 × 10³³ Wm¹²Comparing the luminosity values with that of the sun, we can see that stars A and E would have the same luminosity as the sun.

Therefore, the correct answer is: Stars A and E

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Answer:

Combustion

Explanation:

To develop a rocket with a burnout velocity of 1000 m/s, the specific impulse (Isp) required needs to be calculated. The exit velocity (Ve or Vj) required for the rocket can be determined using the rocket motor equation. The burn time of the rocket can be found by considering the rocket's weight and acceleration over time.

Additionally, the speed of the rocket, assuming a flight path angle of 45 degrees and considering gravity, can be plotted.

1. Calculating Required Isp:

To calculate the required Isp, we use the rocket motor equation: Ve + (Pe - Pa)AC = (m0 / mf) * g0 * Isp, where Ve is the exit velocity, Pe is the pressure at the exit, Pa is the ambient pressure, AC is the throat cross-sectional area, m0 is the initial total mass (rocket weight + propellant weight), mf is the final total mass (rocket weight), g0 is the acceleration due to gravity, and Isp is the specific impulse.

Since the contribution of the pressure differential is ignored, the equation simplifies to Ve = (m0 / mf) * g0 * Isp.

Given the burnout velocity of 1000 m/s, we can substitute the values and solve for Isp.

2. Determining Exit Velocity:

Using the rocket motor equation and the burnout velocity, we can solve for the exit velocity (Ve). This value represents the speed at which exhaust gases leave the rocket nozzle.

3. Plotting Rocket Acceleration and Weight:

To plot the rocket acceleration as a function of time, we need to consider the mass of the rocket over time. Initially, the rocket weight is the sum of the rocket weight (300 kg) and propellant weight (800 kg). As the propellant burns, the rocket weight decreases, resulting in a changing acceleration.

4. Calculating Burn Time:

The burn time of the rocket can be determined by dividing the propellant weight (800 kg) by the propellant consumption rate, which is the mass flow rate of the propellant.

5. Plotting Rocket Speed:

Assuming a flight path angle of 45 degrees and neglecting gravity, the rocket's speed can be plotted over time. This plot represents the rocket's horizontal velocity.

6. Considering Gravity:

To plot the rocket's speed while considering gravity, we need to account for the vertical acceleration due to gravity. By considering the rocket's horizontal and vertical velocities, we can determine the overall speed of the rocket.

By following these steps, the required Isp, exit velocity, burn time, and velocity plots can be determined for the given rocket scenario.

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Answer:

3×10^6

Explanation:

frequency is the speed of light ( c) which is a constant number divided the wavelength

f = 3×10^6 / 1.0

Magnetism is a mysterious force in this universe. Scientists don't fully understand why it occurs in the first place. They aren't sure why these particles have a north and south direction either, according to Live Science, and there are many different forms of magnetism.

Anything that creates a magnetic field is considered to be a magnet. The most notable characteristic of a magnet is a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc., and attracts or repels other magnets. This invisible magnetic field is responsible for this property.

A substance or object that generates a magnetic field that has the potential to impact objects nearby. Magnetic materials, such as iron, are drawn to a magnet. A magnetic field is always present in permanent magnets. One of a magnet's two poles is its centre of the magnetic field.

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There are several characteristics that might make some moons of Jupiter suitable for life. Firstly, the presence of liquid water is crucial for life, and it is believed that some of the moons of Jupiter have subsurface oceans of liquid water.

These include Europa, Ganymede, and Callisto. Secondly, these moons have a source of heat from Jupiter's strong gravitational pull, which could potentially provide the energy needed to support life. Additionally, some of these moons have been found to have organic molecules, which are building blocks of life. Finally, the lack of a thick atmosphere on these moons could make it easier for life to develop and survive.

Overall, these characteristics make some moons of Jupiter intriguing targets for future exploration and the search for extraterrestrial life.

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The least horizontal force required to move the block is 4.0 N.

A force that holds an object at rest is called static friction.

The definition of static friction is: The resistance people feel when they attempt to move a stationary object across a surface without actually causing any relative motion between their body and the surface they are moving the object across.

Weight of the block = 16 N

The coefficient of friction between both surface is 0.25,

Hence, the least horizontal force required to move the block is = frictional resistance force

= 0.25 × 16 N

= 4 N.

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The speed of the wind is 17 mph and the speed of the plane in still air is 119 mph.

Let the speed of the plane be x and the speed of the wind be y. Then, the speed of the plane with the wind becomes x + y, while the speed of the plane against the wind is x - y.

The distance traveled with the wind in 3 hours is 408 miles.

Therefore, we can write the equation as:

3(x + y) = 408

Divide both sides by 3:

x + y = 136  .... (1)

The distance traveled against the wind in 4 hours is also 408 miles.

Therefore, the equation can be written as:

4(x - y) = 408

Divide both sides by 4:

x - y = 102  .... (2)

Now we can solve these two equations using the elimination method.

Add equations (1) and (2):

x + y + x - y = 136 + 1022x = 238x = 119 mph

Therefore, the speed of the plane in still air is 119 mph.

Now, substitute this value of x in equation (1):

119 + y = 136y = 17 mph

Therefore, the speed of the wind is 17 mph.

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The correct question is:

A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air?

Answer:

1.5 N

Explanation:

You've left us to guess what the question is. I will Assume it is what's the force?

Givens

m = 3 kg

vi = 1.5 m/s

vf = 4 m/s

t = 5 seconds

Formula

F = m * (vf - vi)/t

Solution

F = 3 * (4 - 1.5) / 5

F = 1.5 N

Answer:

11196.14 m

Explanation:

From the question given above, the following data were obtained:

Horizontal velocity (u) = 286.2 m/s

Height (h) = 7500 m

Horizontal distance (s) =?

Next, we shall determine the time taken for the payload to get to the target. This can be obtained as follow:

Height (h) = 7500 m

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) =?

h = ½gt²

7500 = ½ × 9.8 × t²

7500 = 4.9 × t²

Divide both side by 4.9

t² = 7500 / 4.9

Take the square root of both side

t = √(7500 / 4.9)

t = 39.12 s

Finally, we shall determine the horizontal distance as follow:

Horizontal velocity (u) = 286.2 m/s

Time (t) = 39.12 s

Horizontal distance (s) =.?

s = ut

s = 286.2 × 39.12

s = 11196.14 m

Thus the payload will travel 11196.14 m horizontally in order to hit the target

Answer:

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Explanation:

v= (f) x ( lambda)

1.7 ms^-1/12.05 m = f =o.14 hz

Answer:

The total frictional force equals 60 N

Explanation:

We know that F - f = ma where F is the applied force, f is the frictional force, m the mass of the object and a its acceleration.

Now, since the cart moves with constant velocity, its acceleration is zero. So, a = 0.

So F - f = ma

F - f = m(0) = 0

F - f = 0

So, F = f

From the above, we see that the frictional force equals the applied force which is equal to 60 N.

So, f the total frictional force equals 60 N

Explanation:

It is given that,

Let Charge of \(1\ \mu C\) is taken from points A & B such that \(V_A-V_B=1000\ V\).

We need to find the energy of charge. Electric potential is defined as the work done per unit of electric charge. So,

\(W=(V_B-V_A)q\\\\W=-1000\times 10^{-6}\\\\W=E=-10^{-3}\ J\)

So, the energy of charge decreases by \(10^{-3}\ J\). Hence, the correct option  is (a).

Answer:

Applied force

Normal force

Frictional force

Tension force

Wind force

Answer: Reaction force. An object at rest on a surface experiences reaction force .

Tension. An object that is being stretched experiences a tension force.

Friction. Two objects sliding past each other experience friction forces. ...

Air resistance. An object moving through the air experiences air resistance .

Gravitational Force.

Explanation:

Just one electrons fill the outer shell of the smallest four elements( H, He, Li, & Be).

A chemical element is a described as chemical substance that cannot be broken down into other substances.

The elements Hydrogen (H), lithium (Li), and sodium (Na), are  group 1 elements and are called  inert gases or noble gases because of their non-reactivity, hence have just one electron in their outermost shells.

Elements has properties and the properties include, but are not limited to, conductivity, magnetism, melting point, boiling point, color, state of matter, and others.

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Answer:

The star's luminosity rises above its previous level. Because it is so cool, the surface will be red, and it will be much farther away from the center than it was during the earlier stages of star evolution. Despite its lower surface temperature, the red giant has a large surface area, which makes it very luminous.

Heat the saucepan after the wine has been added. Growing molecular collisions that defeat the forces of intermolecular attraction. A portion of the wine starts to boil away almost instantly.

Example: The polar H2O molecules are drawn to the sodium and chloride ions in the beaker when NaCl and water are combined there. This interaction's potency is determined by: how big the dipole moment is.

What draws molecules together?

Polar molecules line up so that their positive ends interact with each other's negative ends. Unlike the atoms' covalent bonds in a molecule (intramolecular bonding)

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True. It is currently believed that superclusters of galaxies lie on the surfaces of vast cosmic voids or "bubbles" in space. These voids are regions of space that are largely empty of matter, with the galaxies and galaxy clusters tending to cluster around the edges of these voids.

The largest known of these voids is the Boötes void, which is approximately 250 million light-years in diameter and contains very few galaxies. The idea that superclusters are located on the surfaces of these voids is supported by observations of the large-scale structure of the universe, including the distribution of galaxies and cosmic microwave background radiation.

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Answer:

kinetic energy

Explanation:

Let us cut the work done on gas as we move along the direct path

W=-(-area undercurve),=-[(1.00atm)(4.l-2)+1/2(4-1)(4-2)],W=-5atm

The change in internal energy=-88.5J

What does physics mean by internal energy?

In thermodynamics, internal energy is a property or state functional that characterises a substance's energy in the absence of capillary effects and the impacts of external magnetic, electric, and other fields.

What makes it internal energy?

Internal Energy is the energy in a thermodynamics that is NOT either the system's total kinetic energy or the gravitational potential energy. The system's internal freedom levels are connected to the internal energy.

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It accelerates at about 32 feet per second every second, so it starts falling at zero feet per second and, one second later it is traveling at 32 feet per second. That means that its average speed is 16 feet per second, so it will fall 16 feet in the first second.

a. To determine the velocity of each object before they collide, we can apply conservation of mechanical energy.

For the 2-kg bob compressed against the spring, the potential energy stored in the spring when compressed is given by:

PE_spring = 0.5 * k * x^2,

where k is the spring constant (50 N/m) and x is the compression distance (0.6 m).

PE_spring = 0.5 * 50 N/m * (0.6 m)^2 = 9 J

The potential energy is converted entirely into kinetic energy before the collision:

KE_bob = PE_spring = 9 J

Using the formula for kinetic energy:

KE = 0.5 * m * v^2,

where m is the mass and v is the velocity, we can solve for the velocity of the 2-kg bob:

9 J = 0.5 * 2 kg * v^2

v^2 = 9 J / 1 kg

v = √(9 m^2/s^2) = 3 m/s

Therefore, the velocity of the 2-kg bob before the collision is 3 m/s.

For the 3-kg block on the incline, we can determine its velocity using the conservation of potential and kinetic energy.

The potential energy at the top of the incline is given by:

PE_top = m * g * h,

where m is the mass (3 kg), g is the acceleration due to gravity (9.8 m/s^2), and h is the height (4 m).

PE_top = 3 kg * 9.8 m/s^2 * 4 m = 117.6 J

The potential energy is converted into kinetic energy:

KE_block = PE_top = 117.6 J

Using the formula for kinetic energy, we can solve for the velocity of the 3-kg block:

117.6 J = 0.5 * 3 kg * v^2

v^2 = 117.6 J / 1.5 kg

v = √(78.4 m^2/s^2) ≈ 8.85 m/s

Therefore, the velocity of the 3-kg block before the collision is approximately 8.85 m/s.

b. If the collision between the objects is elastic, the total momentum before the collision is equal to the total momentum after the collision.

Total momentum before the collision:

P_before = m1 * v1 + m2 * v2,

where m1 and m2 are the masses, and v1 and v2 are the velocities.

P_before = (2 kg * 3 m/s) + (3 kg * 8.85 m/s)

P_before ≈ 36.55 kg·m/s

Since the collision is elastic, the total momentum after the collision remains the same.

Total momentum after the collision:

P_after = (2 kg * v1') + (3 kg * v2'),

where v1' and v2' are the velocities after the collision.

We need to solve this equation for v1' and v2'. More information is required about the nature of the collision (head-on or at an angle) to determine the specific velocities after the collision.

c. To determine how much the spring will be compressed by the object(s) after the collision, we need to consider the conservation of mechanical energy.

The total mechanical energy after the collision is equal to the sum of potential and kinetic energy:

Total Energy_after = PE_spring + KE_bob,

where PE_spring is the potential energy stored in the spring and KE_bob is the kinetic energy of the 2-kg

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Answer:

0.59 seconds

Explanation:

To find the time it takes for a tennis ball to reach the ground and bounce back to a height of 7 meters, we need to use the formula for the time it takes an object to fall to the ground.

The formula for the time it takes an object to fall to the ground is given by:

t = sqrt(2 * d / g)

where t is the time it takes the object to fall, d is the distance the object falls, and g is the acceleration due to gravity.

In this case, we are given that the height from which the tennis ball is dropped is 3 meters, the height to which the ball bounces is 7 meters, and the acceleration due to gravity is 9.8 m/s^2. We can use these values to solve for the time it takes for the ball to reach the ground and bounce back to a height of 7 meters.

First, we need to calculate the distance the ball falls. The distance the ball falls is equal to the difference between the height from which the ball is dropped and the height to which the ball bounces:

d = H1 - H2

d = 3 - 7

d = -4

Next, we can use the formula for the time it takes an object to fall to the ground to solve for the time it takes for the ball to reach the ground and bounce back to a height of 7 meters:

t = sqrt(2 * d / g)

t = sqrt(2 * -4 / 9.8)

t = 0.59 seconds

Therefore, it takes 0.59 seconds for the tennis ball to reach the ground and bounce back to a height of 7 meters.