is it true that scientific theories and scientific laws both describe observed events??? provide evidence!!!!! only 2 people could answer so if you can't then comment and provide evidence thank you very much!!!!!!

Answer:

Explanation:

If the mass hangs at the end of the string and the string can support the mass and doesn't break, and the mass hangs still, that means that the tension in the string is equal to the downward pull of the mass. However, we are given the tension in Newtons and the mass needs to be in kg. So we use the equation for weight:

w = mg where w, the weight, is the same as the tension in the string. Gravity is always 9.8 in the metric system:

4.75 = m(9.8) so

m = .48 kg

Answer:

Answer: A

0.485 Kg

Explanation:

The largest distance among the given choices is the distance to Alpha Centauri.  Option D is the correct answer.

Alpha Centauri is a star system located approximately 4.37 light-years away from Earth, making it the closest star system to our solar system. The distance from Mercury to Jupiter, the distance from the Earth to the Sun, and the distance to Sirius (the Dog Star) are all relatively smaller distances within our own solar system.

However, the distance to Alpha Centauri surpasses them all, extending over 4 light-years. Therefore, the correct answer is option D) the distance to Alpha Centauri.

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Final Answer:

a) Margaret's maximum distance from home is 100 miles.

b) Margaret's maximum speed is 60 miles per hour.

c) Margaret's maximum velocity is 60 miles per hour (assuming she traveled in a straight line).

d) Margaret's minimum speed is 20 miles per hour.

e) Margaret's minimum velocity is 20 miles per hour (assuming she traveled in a straight line).

f) The average speed for the entire journey is 40 miles per hour.

g) The average velocity for the entire journey is 0 miles per hour (assuming she returned home, indicating no overall displacement).

Explantion:

Margaret's maximum distance from home is 100 miles because that's the farthest she traveled from her starting point during her journey. Her maximum speed is 60 miles per hour, indicating the highest rate at which she was moving at any point during her trip. Maximum velocity is also 60 miles per hour, assuming she traveled in a straight line during this period.

Her minimum speed is 20 miles per hour, which represents the slowest speed she maintained during the journey. Similarly, her minimum velocity is 20 miles per hour, assuming she was moving in a straight line during this time.

The average speed for the entire journey is calculated by dividing the total distance traveled (100 miles) by the total time taken. In this case, it's 40 miles per hour.

The average velocity, however, is 0 miles per hour. This is because velocity takes into account both the magnitude and direction of motion, and since Margaret returned home, her overall displacement is zero, resulting in an average velocity of 0 miles per hour.

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Impulse in Physics is a term that is used to describe or quantify the effect of force acting over time to change the momentum of an object. It is represented by the symbol J and usually expressed in Newton-seconds or kg m/s.

Answer:

If the resistors are in series the current thru the circuit will be the same for all of the resistors,

Normally, the value of a resistor is given in ohms but the question seems to imply that resistance is given in watts.

3900 + 1000 + 100 = 5000 watts        total power used in the circuit

P = I V

5000 = I * 200 volts

I = 25 amps

So      I^2 R = 1000 watts for the named resistor

R = 1000 / 25^2 = 1.6 ohms for the 1000 watt resistor

V = I * R = 25 amps * 1.6 ohms = 40 V across that resistor

Check: 3900 / 1000 * 40 = 156 volts

100 / 1000 * 40 = 4 volts

Total voltage drop = 40 + 156 + 4 = 200 volts         as given

Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.

To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.

The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).

Using the equation:

v = v₀ + at

where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:

v = 0 + (0.75 m/s²) * t

v = 0.75t m/s

The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:

v = ωr

Substituting the values:

0.75t = ω * 300

Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:

ω = ω₀ + αt

ω = 0 + (0.75 m/s²) * t

ω = 0.75t rad/s

We can now substitute the value of ω into the equation:

0.75t = (0.75t) * 300

Simplifying the equation gives:

0.75t = 225t

t = 0.75 seconds

The time elapsed is 0.75 seconds.

To calculate the distance traveled (s), we can use the equation:

s = v₀t + (1/2)at²

Since the initial velocity (v₀) is zero, the equation becomes:

s = (1/2)at²

s = (1/2)(0.75 m/s²)(0.75 s)²

s = (1/2)(0.75 m/s²)(0.5625 s²)

s = 0.2119 meters or approximately 21.19 centimeters

Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.

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I'm going to assume that this gripping drama takes place on planet Earth, where the acceleration of gravity is 9.8 m/s².  The solutions would be completely different if the same scenario were to play out in other places.

A ball is thrown upward with a speed of 40 m/s.  Gravity decreases its upward speed (increases its downward speed) by 9.8 m/s every second.

So, the ball reaches its highest point after (40 m/s)/(9.8 m/s²) = 4.08 seconds. At that point, it runs out of upward gas, and begins falling.

Just like so many other aspects of life, the downward fall is an exact "mirror image" of the upward trip.  After another 4.08 seconds, the ball has returned to the height of the hand which flung it.  In total, the ball is in the air for 8.16 seconds up and down.

The net force on particle q2 can be calculated by finding the net electric force acting on it. The net electric force acting on a particle is the vector sum of the forces exerted by all the other charges on it.

The electric force between two charges q1 and q2 is given by Coulomb's law: F = k * (q1 * q2)/r^2, where k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them.

The force on particle q2 due to q1 will be:

F1 = k * (q1 * q2) / (0.980m)^2

The force on particle q2 due to q3 will be:

F2 = k * (q2 * q3) / (0.750m)^2

The net force acting on q2 will be the vector sum of F1 and F2.

Keep in mind, q1 and q3 have opposite charges, so they attract each other, while q2 has the same charge as q1, so they repel each other.

Note: The unit of charge is Coulomb (C), but in this problem you are given the charges in microCoulomb (uC) so you need to convert it to Coulomb.

The reason at the time when particles in a solid or liquid move slower and closer together should be explained below.

The particles should be in the form of small pieces of matters. Also, the scientist believed that each and everything in the universe should be made of the particles. here the range of the particles should be in the range via the large  subatomic particles such as electrons or it has lower  microscopic particles.

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Answer:

In a longitudinal wave, a compression is a region when the particles are closest together. A rarefaction is an area in a longitudinal wave where the particles are the furthest distant from one another. A compression is a zone where the medium is compressed, while a rarefaction is a region where the medium is spread out.

Answer:

wet farts, JK its condensation.

The schools in Uganda and Minneapolis are similar because both are places where students learn and neither has a large enough room.

Due to poor economic conditions and management, the schools of Uganda and Minneapolis have small rooms in which students sit to learn. Both are the places where students comes to learn and make better their economic condition so we can conclude that option C and F are correct.

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The force exerted by the pitcher on the 0.15 Kg ball, given that the ball accelerated from rest is 357.35 N

First, we shall determine the acceleration of the ball. Details below:

v² = u² + 2as

90² = 0² + (2 × a × 1.7)

8100 = 0 + 3.4a

8100 = 3.4a

Divide both side by 3.4

a = 8100 / 3.4

a = 2382.35 m/s²

Finally, we shall determine the force exerted. Details below:

Force = mass × acceleration

Force exerted = 0.15 × 2382.35

Force exerted = 357.35 N

Thus, the force exerted is 357.35 N

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Complete question:

A pitcher throws a 0.15-kg baseball accelerating it from rest to a speed of about 90 m/s in a distance 1.7 m . Estimate the force exerted by the pitcher on the ball

The 50 kg mass on 4 m2  on will exert more pressure.

Pressure is described as the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Mathematically pressure = force / area

From Newton's second law

force = mass x acceleration where Acceleration due to gravity = 9.8m/s²

Comparing both pressures where

P1 = 100x 9.8 / 10

p1 = 100 pa

p2 = 50 x  9.8/ 4

p2 = 125 pa

Therefore The 50 kg mass on 4 m2  on will exert more pressure since it exerts more pressure.

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The specific heat of ice is 0.48 cal/g°c much heat will it take to raise the temperature of 10 g of ice from -30°c to -20°c Reconstruction debate that had federalism debate that had been an issue since the 1790s.

Reconstruction failed by most other measures: Radical Republican legislation ultimately failed to temperature former slaves from white persecution and failed to engender fundamental changes to the social fabric of the South. When President Rutherford B. federalism debate that had been an issue since the 1790s almost mediately . Hayes removed federal troops from the South in 1877, former Confederate officials and slave returned to With the support of a conservative Supreme Court, these newly empowered white southern politicians passed black codes, voter qualifications, and other anti-progressive legislation to reverse the rights that blacks had gained during Radical Reconstruction. The U.S. Supreme Court bolstered this federalism anti-progressive movement federalism  with decisions in the Slaughterhouse temperature, the Civil Rights Cases, and United States v.

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When an object protected by a lightning rod is struck by a lightning bolt, it will bleed the lightning discharge to the ground before the protected object can be harmed.

To protect a building or an object from a direct hit of lightning, light rods are designed which conducts the electric discharge to the ground. lightning rods protect the object from damage, particularly from fires caused by lightning.

So to protect an object from lightning, lightning rods are used.

Therefore, when an object protected by a lightning rod is struck by a lightning bolt, it will bleed the lightning discharge to the ground before the protected object can be harmed.

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Answer:

Acceleration = 5.77 m/s²

Distance cover in 13 seconds = 487.56 meter

Explanation:

Given:

Final velocity of mobile device = 75 m/s

initial velocity of mobile device = 0 m/s

Time taken = 13 seconds

Find:

Acceleration

Distance cover in 13 seconds

Computation:

v = u + at

75 = 0 + (a)(13)

13a = 75

a = 5.77

Acceleration = 5.77 m/s²

s = ut + (1/2)(a)(t²)

s = (0)(t) + (1/2)(5.77)(13²)

Distance cover in 13 seconds = 487.56 meter

Answer: tectonic plates

Explanation:

Answer:

please make me brainalist and keep smiling dude

Explanation:

Answer:

Explanation:

Nagar Panchayat (for an area in transition from rural to the urban area);

Nagar Panchayat (for an area in transition from rural to the urban area);Municipal Council for the smaller urban area; and.

Nagar Panchayat (for an area in transition from rural to the urban area);Municipal Council for the smaller urban area; and.Municipal Corporation for a larger urban area.

When a torque is applied to a circular shaft, you can observe the following:

1. The circular shaft will experience twisting or rotational deformation, which means the angle of twist will change along the length of the shaft.
2. Shear stress will be induced in the material of the shaft, causing internal resistance against the applied torque.
3. The amount of twist or angular deformation is directly proportional to the applied torque and the length of the shaft, and inversely proportional to the shaft's polar moment of inertia and material's modulus of rigidity.

In summary, when a torque is applied to a circular shaft, you can observe twisting, shear stress, and a relationship between the applied torque, length, polar moment of inertia, and modulus of rigidity.

So, the correct answer is 1, 2, 3, 4, and 5.

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Answer:

20 m/second squared

Explanation:

Initial velocity of the car (u) = 0 m/s

Final Velocity of the car (v) = 120 m/s

Time (t) = 6 seconds

\(Acceleration \: of \: the \: car = \frac{v - u}{t} \\ \\ = \frac{120 - 0}{6} \\ \\ = \frac{120}{6} \\ \\ = 20 \: m {s}^{ - 2} \)

Answer:25

Explanation:

Formula(77°F − 32) × 5/9 = 25°C

Answer: The answer is C. 298 K

Explanation:

Answer: a bridge suspended by cables

Answer:

ΔU = 5.21 × 10^(10) J

Explanation:

We are given;

Mass of object; m = 1040 kg

To solve this, we will use the formula for potential energy which is;

U = -GMm/r

But we are told we want to move the object from the Earth's surface to an altitude four times the Earth's radius.

Thus;

ΔU = -GMm((1/r_f) - (1/r_i))

Where;

M is mass of earth = 5.98 × 10^(24) kg

r_f is final radius

r_i is initial radius

G is gravitational constant = 6.67 × 10^(-11) N.m²/kg²

Since, it's moving to altitude four times the Earth's radius, it means that;

r_i = R_e

r_f = R_e + 4R_e = 5R_e

Where R_e is radius of earth = 6371 × 10³ m

Thus;

ΔU = -6.67 × 10^(-11) × 5.98 × 10^(24)

× 1040((1/(5 × 6371 × 10³)) - (1/(6371 × 10³))

ΔU = 5.21 × 10^(10) J

Answer:

Below

Explanation:

Speed of sound at 16 degrees C = 340.866 m/s

  (Speed of sound at 0 degrees C is 331.3 m/s   ....I do not know where they got the incorrect value of 345 m/s at 0 °C)

2.5 s   *   340.866 m/s =  852 m away from fireworks

The mean kinetic energy possessed by the body as its velocity increases from A m/s to B m/s is [(1/2) * m * (B^2 - A^2)] / (B - A) Joules.\

To find the mean kinetic energy possessed by a body as its velocity increases from A m/s to B m/s, we need to calculate the change in kinetic energy and divide it by the change in velocity.

Given:

Mass of the body (m) = m kg

Initial velocity (A) = A m/s

Final velocity (B) = B m/s

The formula for kinetic energy is KE = (1/2) * m * v^2, where m is the mass of the body and v is its velocity.

Initial kinetic energy (KEi) = (1/2) * m * A^2

Final kinetic energy (KEf) = (1/2) * m * B^2

Change in kinetic energy (ΔKE) = KEf - KEi

ΔKE = (1/2) * m * B^2 - (1/2) * m * A^2

ΔKE = (1/2) * m * (B^2 - A^2)

Change in velocity (Δv) = B - A

Mean kinetic energy (KE_mean) = ΔKE / Δv

KE_mean = [(1/2) * m * (B^2 - A^2)] / (B - A)

Therefore, the mean kinetic energy possessed by the body as its velocity increases from A m/s to B m/s is [(1/2) * m * (B^2 - A^2)] / (B - A) Joules.

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Answer:

A

Explanation:

A conductor works by allowing electrons to move through it with relative ease. In metals, this movement is facilitated by the structure of the material. Metals consist of a lattice of atoms in which the outermost electrons are not tightly bound to any particular atom. Instead, they are shared by all the atoms in the lattice and are free to move through the material. This allows electricity to flow freely through the metal, making it a good conductor.

This is a what do you think question.

Answer:

63.0 x (6.02 x 10^23) = 3.79 x 10^25 atoms of gold

Explanation:

There are 6.02 x 10^23 representative particles in a mole of any substance. Multiply it by the number of moles, and you will get the number of representative particles (atoms, molecules, formula units)

Evaluating electric and magnetic fields can be challenging due to the complex nature of these fields and the various factors that can influence them.

One of the main reasons why it is difficult to evaluate electric and magnetic fields is because they are often dependent on the type of content loaded into a particular device or system. For example, the presence of conductive materials or the orientation of an object can affect the strength and direction of these fields, making it challenging to accurately measure them. Additionally, there are several variables that can impact the measurement of electric and magnetic fields, including the distance between the measurement device and the field source, the frequency of the field, and the equipment used to measure the fields. These factors can all contribute to variations in the measured values, making it difficult to determine the true strength and direction of the fields. Another challenge when evaluating electric and magnetic fields is that they can have a range of effects on different materials and living organisms. This means that it is important to consider the potential health and safety implications of exposure to these fields, and to take appropriate measures to mitigate any risks. Overall, evaluating electric and magnetic fields requires careful consideration of the specific factors that can influence the fields, as well as a thorough understanding of the potential implications of exposure to these fields. By taking these factors into account, it is possible to develop accurate and effective measures for evaluating and managing electric and magnetic fields in a range of different applications.

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