Why might using the speed of light to determine the length of the meter be
more reliable than using a measured distance around Earth?

The magnitude of the force on the wire is 1.9 × 10⁻⁴ N. The direction of the current is 50° south of the west. 1.9×10 N⁻⁴, out of the Earth's surface is the correct option.

Length of the horizontal wire, L = 3.0 m

Current flowing through the wire, I = 6.0 A

Earth's magnetic field, B = 0.14 × 10⁻⁴ T

Angle made by the current direction with due west = 50° south of westForce on a current-carrying wire due to the Earth's magnetic field is given by the formula:

F = BILsinθ, where

L is the length of the wire, I is the current flowing through it, B is the magnetic field strength at that location and θ is the angle between the current direction and the magnetic field direction

Magnitude of the force on the wire is

F = BILsinθF = (0.14 × 10⁻⁴ T) × (6.0 A) × (3.0 m) × sin 50°F = 1.9 × 10⁻⁴ N

Earth's magnetic field is due north, the direction of the force on the wire is out of the Earth's surface. Therefore, the correct option is 1.9×10 N⁻⁴, out of the Earth's surface.

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D. Chemical energy stored in the bonds of the molecules of the sandwich is transformed into kinetic energy. This statement describes the energy transformation that occurs when a person eats a sandwich to gain energy for a long hike

Law of energy conservation states that energy can neither be created nor be destroyed and can only transform from one form to other form.

From Law of energy conservation we can say that Digestion starts from that very point when we put food in our mouth so the moment you eat the sandwich, it starts getting digested and when it reaches the stomach ,your body converts its chemical energy into the movement of your muscles.

hence , correct option is :

D. Chemical energy stored in the bonds of the molecules of the sandwich is transformed into kinetic energy.

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Answer:

don't  

Explanation:

The mass of the block is 4.5 kg that falls by 40m and work done is -1800J.

The work done is defined as the product of the displacement of an object and the component of the applied force which is in the direction of the object's displacement.

w=f × s

-1800=f×40

f=45 N

by Newton's 2nd law

F=ma

45=m×(10)

m=45÷10=4.5 kg

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Answer:

359cm

Explanation:

The change in length of the cord due to a stretching force of 0.5N is given by Hooke's law:

ΔL = k * ΔF

Where ΔL is the change in length, k is the spring constant and ΔF is the change in force.

Since the spring constant for the cord is 3N/cm, the change in length due to a stretching force of 0.5N is:

ΔL = (3N/cm) * (0.5N) = 1.5 cm

Since the cord is already 350cm long, the total length of the cord when the stretching force is 0.5N is 350cm + 1.5cm = 351.5cm.

To find the length of the cord when the stretching force is 2.5N, we can use the same formula:

ΔL = (3N/cm) * (2.5N) = 7.5 cm

The total length of the cord when the stretching force is 2.5N is therefore 351.5cm + 7.5cm = 359cm.

Answer:

Explanation:

Pecan 1 and 4 seem the best answer

Answer:

The temperature  change in the calorimeter will be lower

Explanation:

Water is an example of a molecular substance. They have relatively low melting points and boiling points usually below 300° C . Water reacts with metals to a degree varying with their position in the electrochemical series.

The specific heat of water is 4179.6 Joules which is relatively high . This typically implies that water absorbs a larger amount of heat but the increase in temperature of its boiling points is relatively low. Thus; in the 200-mm test tube that contains water and was subsequently added to the calorimeter , the heat present was initially absorbed by the water and that does not result to an increase in the temperature change in the calorimeter. Thus the temperature change in the calorimeter will be lower.

Taking into account the Universal Law of Gravitation, the force of gravity between them is quadrupled the mass of both of the objects is doubled.

The Universal Law of Gravitation establishes that bodies, by the simple fact of having mass, experience a force of attraction towards other bodies with mass, called gravitational force.

The Universal Law of Gravitation states that the gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance that separates them.

Mathematically it is expressed as follows:

\(F=G\frac{Mm}{d^{2} }\)

where:

Since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. So as the mass of either object increases, the force of gravitational attraction between them also increases.

In this case, the mass of the objects is doubled. Then, the force of gravity between them is quadrupled.

In summary, the force of gravity between them is quadrupled the mass of both of the objects is doubled.

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To ensure proper airspace protection while holding at5,000 feet in a civil aircraft, the maximum indicated airspeed a pilot should use is 200 knots.

Indicated airspeed means that the speed of an aircraft as shown on pitot static airspeed indicator is calibrated to reflect standard atmosphere adiabatic compressible flow at sea level uncorrected for airspeed system errors.

Indicated airspeed is the airspeed which is read directly from the airspeed indicator on an aircraft and driven by the pitot-static system. It uses difference between total pressure and static pressure, to mechanically or electronically measure dynamic pressure.

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to guide us on where stuff are or what the stuff are called and used for

2.18X103 N force must be exerted on a nail with a circular tip of 1.00 mm diameter to create a pressure.

diameter, d = 0.95 mm = 0.95x10-3m

P = 3.1X10^9 Pa

r = d/2 = 0.95/2 x 10^-3 m

= 0.475 x 10^-3 m

Area = \(\pi\) r2

= 3.14 x ( 0.475 x 10^-3 m)2

=  = 3.14 x 0.225 x 10^-6

= 0.706 × 10-6 m2

Force = PXA

= 3.1 x 10^9 x 0.70 6 × 10^-6

F = 2.18X103 N

Pressure , within the physical sciences, the perpendicular force in step with unit per area , or the stress at a factor inside a restricted fluid.

A easy instance of pressure can be seen by retaining a knife to a bit of fruit. In case you keep the flat part of the knife towards the fruit, it might not reduce the area. The force is spread out of a massive vicinity (low strain).

The SI unit of pressure is pascal (represented as Pa) which is identical to one newton in line with rectangular metre (N/m2 or kg m-1s-2).

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Answer:

false. its called conflict

Answer:

. ... Because ultrasound sound waves have a difficult time traveling through the air, ultrasound gel is used to reduce the air between your patient and the transducer to reduce acoustic impedance and reflection to allow for a clear image to be produced

Answer: momentum = mass × velocity; and is a vector quantity. Newton's 2nd Law : Fnet=ma. (1). so we have. F=28N. u=0ms−1. v=55ms−1. t=3s.

Explanation: we need the following results momentum = mass×velocity; and

The acceleration of the toy rocket is 18.33 m/s². Then the mass of the toy is force divided by acceleration that is 1.52 Kg.

Force is an external agent acting on a body to change its motion or to deform it. There are various kinds of forces such as frictional force, magnetic force, nuclear force etc.

According to Newton's second law of motion, the force acting on a body is the product of its mass and acceleration.

F = ma

Acceleration is the rate of change in velocity.

Given, velocity = 55 m/s

time = 3 s

acceleration = 55 m/s /3 s = 18.3 m/s²

Mass = F/a

m = 28 N/18.3 m/s² = 1.52 Kg.

Therefore, the mass of the toy rocket is 1.52 kg.

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Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

Answer:

Explanation:

A - 4.5

Answer:

34.55m/s

Explanation:

Now from Newton's law of motion;

V= U+ a×t

V- final velocity

U- initial velocity = 0m/s

a- acceleration

t- time

Note that a = g/cos53.2°

Now g is acceleration of free fall due to gravity

This is a vertical acceleration since the course of motion is along a plane inclined at 53.2° to the height of the pool.

Also from trigonometry identity

cos 53.2°= vertical component a/ acceleration ( cos a = adjacent/hypothenus)

If we assume g = 9.8m/S2 { a generally given value}

Substituting t = 3.45s as the time of consideration, we have;

V = 0 + (9.8/cos53.2°)×3.45

= -34.55m/s

Note the -ve sign is just telling us this velocity is causing the object to move down.

Hence V = 34.55m/s

Answer:

27.07 m/s

Explanation:

this is the right answer

The month in which  the United States experiences the highest level of thunderstorm activity is July.

The United States is a vast country with a diverse climate, and thunderstorm activity varies across different regions and seasons. However, on average, thunderstorm activity is most intense in the month of July across the entire country.

This is primarily due to the fact that July is the warmest month of the year in most regions, with high temperatures and high humidity levels creating unstable atmospheric conditions that are favorable for thunderstorm development.

In addition, the peak of the Atlantic hurricane season typically occurs in late summer, which can also contribute to increased thunderstorm activity in coastal regions. While thunderstorm activity can occur at any time of year, July tends to be the month when thunderstorms are most frequent and most intense across much of the United States.

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Answer:

5.95 m/s to the right

Explanation:

Before the collision, the momentum of the system is given by:

p = m1v1 + m2v2

p = (9.00 kg)(14.0 m/s) + (12.0 kg)(-5.00 m/s)

p = 125.0 kg m/s (to the right)

During the collision, the two masses stick together, so their final velocity will be the same. Let's call this final velocity vf. The momentum of the system after the collision is given by:

p' = (m1 + m2)vf

p' = (9.00 kg + 12.0 kg)vf

p' = 21.0 kg vf

Since momentum is conserved in the collision (there are no external forces acting on the system), we can set p = p' and solve for vf:

125.0 kg m/s = 21.0 kg vf

vf = 5.95 m/s (to the right)

Therefore, the final velocity of the combined masses after the collision is 5.95 m/s to the right.

Answer:

7 1/2m/s/s

Explanation:

37-22=15

15/2=7 1/2

Answer:

no

Explanation:

ans should be correct

Answer:

The phrase "an explanation of a natural phenomenon that is supported by facts gathered from many scientific investigations" best describes a Theory. A theory is a well-substantiated explanation of a natural phenomenon that is based on empirical evidence and has been repeatedly tested and confirmed through scientific experiments and observations. Theories are based on a significant amount of evidence and can be modified or refined as new evidence is discovered. Therefore, option C is the correct answer.

(a) In region 1, the particle will accelerate in the direction of the uniform electric field.

(b) To quantitatively describe the motion in region 1, more information is needed, such as the magnitude of the electric field, the charge of the particle, and its initial conditions.

(a) Qualitative description of the motion in region 1:

1. The particle experiences a force due to the uniform electric field pointing to the right.

2. Since the particle is initially at rest, it will accelerate in the direction of the electric field.

3. The particle's velocity will increase over time as it moves in a straight line.

(b) Quantitative analysis of the motion in region 1:

1. Use Newton's second law, F = ma, to calculate the acceleration of the particle.

2. The force on the particle is given by F = qE, where q is the charge of the particle and E is the magnitude of the electric field.

3. The acceleration, a, can be determined as a = F/m, where m is the mass of the particle.

4. Once the acceleration is known, the particle's velocity can be found using the kinematic equation v = u + at, where u is the initial velocity (zero in this case) and t is the time taken to travel distance d.

5. The distance traveled, d, in region 1 can be calculated using the kinematic equation s = ut + (1/2)at², where s is the distance and u is the initial velocity (zero).

6. The time taken to travel distance d can be found using the equation t = (2d)/(v + u), where v is the final velocity.

7. Substitute the values of q, E, m, and d into the equations to obtain the specific values for acceleration, velocity, and time.

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When an earthquake occurs, rocks at a fault line slip or break, and two sections of Earth's crust physically move relative to one another. That movement releases energy, and two types of seismic waves radiate outward from the earthquake through Earth's interior and along its surface.

WHEREAS

Ocean waves are created by energy passing through water, causing it to move in a circular motion. ... Wind-driven waves, or surface waves, are created by the friction between wind and surface water. As wind blows across the surface of the ocean or a lake, the continual disturbance creates a wave crest.

Convection differs from radiation in the sense that in radiation, matter is not involved. Option D.

The term heat transfer has to do with the movement of heat from one point another. Recall that heat transfer is one of the things that does occur in nature. There are three kinds of heat transfer that occur in nature and these are;

Let us recall that in the process of convection, there is the movement of heat from one point to the other via the actual movement of the particles of the substance.  On the other hand, radiation occur when heat is transferred without an movement or contact between the objects  between which the heat is transferred. Thus, when air masses are moving, it is a process of convection taking place.

Hence, the difference between conduction and radiation is that matter is involved in convection but not in radiation.

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Answer:

how can I download your doc it's not getting on please help I want to answer your question. you take a screenshot and send once more on this is it okkk.

Explanation:

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Studies from Type 1 supernovae at very large red shifts led to the discovery of "dark energy.

When type I supernova occur, the start is detonate and cause the increase of the white dwarf's mass. When the white dwarf's mass reaches a density of more than 2 x 10⁹ g/cm³, The star core is collapse, that causes a fusion process between carbon and oxygen. This condition is the main factor to the detonation of the stars.  During this detonation the star is completely destroyed that produce dark energy. Dark energy is a hypothetical form of energy that exerts a repulsive pressure, negative and its activity like the opposite of gravity.

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Liar, not even 40 points....

Answer:

D

Explanation:

I just did it on apex

The diameter of the sun, based on the given angular diameter of 3 arcminutes, is 5.56 kilometers.

To calculate the diameter of the sun, we can use the concept of angular diameter. The angular diameter of an object is the angle it subtends at the observer's location.

In this case, the angular diameter of the sun is given as 3 arcminutes (3').

We know that 1 degree (°) is equal to 60 arcminutes (').

So, 1 arcminute is equal to 1/60 degrees.

Given that the angular diameter of the sun is 3 arcminutes, we can convert it to degrees:

3 arcminutes * (1/60 degrees / arcminute) = 3/60 degrees = 0.05 degrees

Now, let's use the concept of angular diameter and trigonometry to calculate the diameter of the sun.

We can consider a right-angled triangle with the observer at one vertex, the center of the Earth at another vertex, and the sun's center at the third vertex. The angle at the observer's location is half the angular diameter,

which is 0.05 degrees / 2 = 0.025 degrees.

We can consider the radius of the Earth as a known value, approximately 6,371 kilometers.

Using trigonometry, we can set up the following equation:

tan(0.025 degrees) = (radius of the sun) / (distance from the Earth's center to the observer on the surface)

We can assume the distance from the Earth's center to the observer on the surface as equal to the radius of the Earth, which is 6,371 kilometers.

tan(0.025 degrees) = (radius of the sun) / 6,371 kilometers

Now, we can solve for the radius of the sun:

(radius of the sun) = tan(0.025 degrees) * 6,371 kilometers

Using a scientific calculator or trigonometric table, we can find the value of tan(0.025 degrees) to be approximately 0.000436.

(radius of the sun) = 0.000436 * 6,371 kilometers

(radius of the sun) ≈ 2.78 kilometers

Finally, to calculate the diameter of the sun, we double the radius:

diameter of the sun ≈ 2 * 2.78 kilometers

diameter of the sun ≈ 5.56 kilometers

Therefore, the diameter of the sun, based on the given angular diameter of 3 arcminutes, is approximately 5.56 kilometers.

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