calculate the ratio of the resistance of 15.0 m of aluminum wire 2.2 mm in diameter, to 23.0 m of copper wire 2.0 mm in diameter.

The angular magnification of the telescope with 12.7 m and an eyepiece with focal length 3.84 cm is 330.729.

What is magnification of a telescope?

Magnification of the telescope is the amount that a telescope can enlarge its subject. It is equal to the focal length of the telescope divided by the focal length of the eyepiece. Some factors like true field, resolution and apparent field have to be considered.

Magnification of the telescope can be calculated as,

M = Fo / Fe

where Fo = focal length of objective lens, Fe = focal length of the eyepiece.  

M = 12.7 m / 3.84 cm = 12.7 / 3.84 x 10^-2 m = 330.729.

Therefore, the magnification of the telescope with 12.7 m and an eyepiece with focal length 3.84 cm is 330.729.

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Answer:

Explanation:

Explanation

PE = mgh

The mass once stated, cannot be altered. You cannot decide that 1/2 down its fall, it becomes 25 kg. The mass is fixed once it has a value.

g for your intents is a constant.  

h is the only thing you can change.

Givens

m = 10 kg

g = 9.81 m/s^2

h = 30 m

Solution

PE = m*g*h                       Substitute the givens into the equation

PE = 10 * 9.81 * 30

PE = 2943 Joules

Note a Joule is made of Kg m^2/sec^2

The Andean Hummingbird (Patagona gigas) has a mass of 70 g and flaps its wings 10 times per second while hovering. Possible answers: between 0.7 J/beat and 1.75 J/beat.

To move an object, it must be converted into energy. The transfer of energy can be done in a force way. This amount of energy transferred by the force that moves the object is called work done. Expressing this concept mathematically, the work W is equal to the force f multiplied by the distance d, or W = fd. If the force is applied at an angle θ to the displacement, the work done is W = fd cos θ. Scientifically, work is done only when a certain distance is traveled or a force is applied. If the object to which the force is being applied is not moving, no work is being done.

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a = 3.53 m/[tex]s^{2}[/tex] is the magnitude of the acceleration of a skydiver who is currently falling at one-fifth his eventual terminal speed.

a= g×(1-([tex]\frac{16}{25}[/tex])

a= 9.8×(1-[tex]\frac{16}{25}[/tex])

a= 3.53 m/[tex]s^{2}[/tex]

In mechanics, acceleration refers to the rate at which an object's velocity with respect to time varies. Acceleration is a vector quantity (in that they have magnitude and direction). The direction of an object's acceleration is determined by the direction of the net force acting on it.

According to Newton's Second Law, the amount of an object's acceleration is the combined result of two causes:  

The acceleration unit in the SI is the meter per second squared.

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The answer is projectile.

Handguns and rifles use a cartridge having a single projectile or bullet. Shotguns use a shot shell comprising either a single bullet or a big number of small projectiles (shot or pellets). Though, the basic components of cartridges and shot shells are alike.

Modern ammunition varies depending on the type of firearm. Rifles and handguns use a cartridge containing a single projectile (bullet). Shotguns use a shotshell containing either a single slug or a large number of small projectiles (shot or pellets). However, the basic components of cartridges and shotshells are similar.

Therefore, the answer to your question is projectile. The basic component of cartilages and shotshells is projectile.

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Answer:

same

Explanation:

They both have the same volume....so they both displace an equal amount of water and thus experience the same buoyancy force

The height of the cliff is 80 meters.

The rate of change of position of an item in any path. The speed is measured because of the ratio of distance to the time in which the distance was included.

Velocity can be the concept of the charge at which an item covers distance. a quick-shifting item has a high pace and covers a highly huge distance in a given quantity of time, whilst a sluggish-shifting object covers a fantastically small quantity of distance in an identical amount of time.

Motion is a change in the function of an object over the years. motion is defined in terms of displacement, distance, speed, acceleration, time, and speed. speed, being a scalar amount, is the fee at which an item covers distance with respect to time.

Calculation:-

Time = distance/ speed

         = 30/15

          = 2 seconds.

S = ut + 1/2 at²

   = 30 × 2 + 0.5 × 10 × 4

   = 60 + 20

    = 80 meters.

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The stated assertion states that r> Ra lengths from the conducting cylinder's axis.

We can determine an object's actual size by learning how far it is from us. The area that an object occupies in the sky can be measured. The distance to an object is then necessary to calculate its real size. An thing appears smaller the farther it is away.

Briefing:

The magnetic force is inversely correlated with the conducting cylinder's axis distance.

The strongest magnetic field Rb = 4.95 cm,

Most minimal gravitational flux = r>Ra

Rb = 4.95 cm

r= 5.40 cm

Ra =7.75 cm

r> Ra

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The velocity at the maximum height is zero.

Velocity defines the direction of the motion of the body or the item. speed is generally a scalar quantity. Velocity is essentially a vector quantity. It's far the rate of alternate of distance. it is the rate of change of displacement.

Speed is the time rate at which an object is moving alongside a path, while pace is the price and path of an object's motion. Put another way, speed is a scalar value, whilst velocity is a vector.

In easy phrases, velocity is the speed at which something moves in a specific route. as an instance as the speed of a vehicle journeying north on a highway, or the rate a rocket travels after launching. The scalar means absolutely the cost value of the speed vector is constantly be the velocity of the movement.

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The final angular velocity ,  angular displacement,  initial rotational kinetic energy, final rotational kinetic energy and work done on the disk are respectively 25 rad/s, 150 rad, 0.25 Joule, 6.25 Joule, and 6.00 Joule.

Given parameters:

Mass of the disc; m = 0.5 kg.

Initial angular velocity: ω₀ = 5 rad/sec

Mass of inertia; I =  0.02kg.m².

Angular acceleration; α = 2 rad/sec².

1. The disc final angular velocity at 10 second =  ω₀ + α t

= 5 + 10×2 rad/s

= 25 rad/s.

2.  The disc angular displacement of the disc at the end of 10seconds;

d = ω₀t + 1/2 α t²

= 5×10 +1/2 × 2 × 10² rad

= 150 rad.

3.  The initial rotational kinetic energy of the disc = 1/2 I ω₀²

= 1/2 × 0.02× 5² Joule.

= 0.25 Joule.

4. The final rotational kinetic energy of the disc at the end of 10seconds

=  1/2 I ω²

= 1/2 × 0.02 × 25² Joule

= 6.25 Joule.

5. The work done on the disk during the given time = final rotational kinetic energy - initial rotational   kinetic energy

= 6.25 Joule - 0.25 Joule

= 6.00 Joule.

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Elliptical galaxies lack structure and have a rounded ellipsoidal form, which gives them the appearance of a huge spherical or elliptical ball of stars. It is possible to categories elliptical galaxies according on how long and narrow they seem.

Galaxies were first categorized by Edwin Hubble into four categories: spirals, barred spirals, ellipticals, and irregulars. He further divided spiral and barred spiral galaxies based on their size.

The question is incomplete, the complete question is:

s this a photo of a spiral galaxy or an elliptical galaxy, and how do you know?.

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The balloon volume is fixed at 0.413793. We can assume that the outside air pressure is constant.

The pressure inside a hot air balloon is affected by temperature. As the molecules heat up they move faster and hit the inner wall of the balloon harder. This increased motion of gas particles increases the force exerted on the area of the balloon increasing the pressure.

Calculation:-

Pressure = 120 kpa

Temperature = 290 K

PV = nRT

V = nRT/P

= 1 × 8.314× 290/120×100

= 0.413793

The frozen balloon contracted because the average kinetic energy of the gas molecules inside the balloon decreased as the temperature decreased. As a result, the molecules move more slowly and collide with the inner wall of the balloon less frequently and weaker, causing the balloon to deflate somewhat. At a constant temperature if the balloon is compressed to half its volume the air pressure inside the balloon doubles.

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Disclaimer:- your question is incomplete, please see below for the complete question.

The preure of the air in the balloon i returned to 120 kPa. The temperature of the air inide the balloon i 290 K. The balloon i teted again, changing the temperature of the air and keeping the volume of

the balloon contant at pressure?.

He reaches the bottom of the pole in the time of 2.6 sec .

What is force ?

Mechanics compels any action intended to maintain, alter, or distort the motion of an object. The concept of force is commonly explained using Isaac Newton's three laws of motion. According to Newton's first principles, an object at rest, or in uniform linear motion, will remain in that state until a force is applied. The second law states that when an external force acts on an object, it will accelerate (change in velocity) in the direction of the force. The magnitude of acceleration is directly proportional to the magnitude of the external force and inversely proportional to the amount of matter in the body. Newton's third law states that when one object exerts a force on another object, the second object exerts the same force on the first object. This principle of action and reaction explains why forces tend to deform objects (that is, change their shape), whether or not they move them. Object deformation can usually be ignored when studying object motion.

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If the current in a current is reversed in a magnetic field, the direction of the magnetic field and the conductor will also be reversed.

The right-hand rule correctly describes this effect. The current follows the direction the thumb is pointing, but the direction of the magnetic field is dictated by the direction the finger is pointing. If the direction of the current changes, the direction of the magnetic field also changes. When the direction of the current is reversed, the compass needle moves in the opposite direction because the polarity of the magnetic field is reversed. The generated magnetic field is always perpendicular to the direction of the current and parallel to the electromagnets. Therefore, reversing the current will also reverse the direction of the magnetic field.

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At time 0.25 s the driver position is at 0.45 m if he drives the vehicle at an initial speed of 1. 8 m/s.

At t = 0.25 s

Considering horizontal motion of diver vehicle :-

Initial speed, u =  1.8 m/s

Acceleration , a = 0 m/s²

Displacement, s = ?

Time, t = 0.25 s

the equation of motion, s= ut + 0.5 at²

Substituting all the above given values

  s= ut + 0.5 at²

  s = 1.8 x 0.25 + 0.5 x 0 x 0.25²

  s = 0.45 m

so, the position of vehicle will be 0.45 m at an initial speed of 1. 8 m/s.

the complete question is:

A diver runs horizontally off the end of a 3.0-m-high diving board with an initial speed of 1.8 m/s. Given that the diver's initial position is xi=0 and yi=3.0m, find her x positions at the time t = 0.25 s.

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The anchors to reach the bottom of the lake are 250 seconds.

Solution:

v = d/t

t = d/v

t = 17.5 ft/0.07ft

t = 250 second

So, the time taken by the anchor to reach the bottom of the lake is 250 seconds. Hence, this is the required solution.

A saltwater pool sometimes called an underwater lake deep sea, or salt lake is a volume of salt water that collects in a depression on the ocean floor. A pool is a dense body of water with a salinity of three to eight times that of the surrounding sea. The lake's water comes from rain snow melted ice streams and seepage from groundwater. Most lakes contain fresh water.

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El niño affects the pattern of rainfall over months to seasons by redistributing heat and wind across the Pacific. As the atmosphere above the heated water surface warms, moist air rises and forms rain clouds.

Surface waters in the central and eastern Pacific Ocean become significantly warmer than usual during an El niño event. This shift is inextricably linked to the atmosphere and the winds blowing across the vast Pacific. Easterly trade winds (which blow from the Americas to Asia) weaken and can even turn westward. This allows large amounts of warm water to slosh from the western Pacific toward the Americas. It also reduces the upwelling of cooler, nutrient-rich waters from the deep, slowing or reversing ocean currents along the equator and the west coasts of South and Central America.

The air circulation above the tropical Pacific Ocean responds to this massive redistribution of ocean heat. The eastern Pacific's typically strong high-pressure systems weaken, altering the balance of atmospheric pressure across the eastern, central, and western Pacific. While easterly winds are typically dry and consistent, Pacific westerlies tend to arrive in bursts of warmer, moister air.

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The momentum of Bobby having a mass of 50 kg is 235 kgm/s.

Momentum can be defined as the product of mass and velocity of a body.

To calculate the momentum of the of Bobby, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the momentum of Bobby is 235 kgm/s.

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The spinning down mass , to learn the mass and radius.

What is radius?

The average distance from the planet's physical center to its surface, calculated from a large number of samples, is known as the mean radius of the Earth. Approximately 6,371,000 meters are represented by the value, rearth. This translates to approximately 3,960 statute miles or 6,371 km.

What is mass?

In physics, mass is a numerical representation of inertia, which is a basic characteristic of all matter. The resistance a body of matter offers to a change in its speed or position as a result of the application of a force is what it is in essence.

Let mass of flywheel be m

Initial angular speed of flywheel=500rpm=52.36 rad/s

Mass moment of inertia of flywheel=(1/2)mr^2=0.72m

Initial rotational kimetic energy=(1/2)*0.72m*52.36^2

Work done in coming to rest = 5100J

Therefore,(1/2)*0.72m*52.36^2=5100

Therefore the mass is 5.17 kg.

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The mass of stone blocks on a sled to build a pyramid is 8960 kg and it needs 14400 N of force to move.

With the aid of the following formula, the maximum amount of friction force that a surface can exert on an item can be quickly determined:

Fnorm = ω *Ffrict

Fnormal = 0.8 * 14000 N

Therefore, F normal = 11200 N

The support force that is applied to an object when it comes into touch with another stable object is known as the normal force. Most of the time, the following formula can be used to easily describe the normal force:

N = mg

Here, N is the normal force we calculated above

Now, substituting the value of force normal , and gravitational acceleration = 9.8 [tex]m/s^{2}[/tex] into the equation

11520 N= m * 9.8

m = 11200/9.8

m = 8960 kg

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The voltage across the battery's terminals is the same as the voltage across the resistor and capacitor.

The capacitor's voltage is higher than the battery's voltage. Since there is no current flowing through this circuit in the steady state, there is no voltage across the resistor. Compared to the voltage of the battery, the voltage across the capacitor is lower.

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The work done by the applied force is 21.23 J.

The work done by the gravity is 29.4 J.

The magnitude of the normal force between the block and the wall is 9.8 N.

The work done on the block include the following;

where;

The applied force on the block is calculated as follows;

Fsinθ - μmgsin(90) = ma

at a constant velocity, the acceleration of the block = 0

Fsinθ - μmg = 0

Fsinθ = μmgsinθ

F =  μmg/sinθ

F = (0.4 x 1 x 9.8)/sin(29)

F = 8.09 N

The work done by the applied force is calculated as;

W = Fcosθ x d

W = (8.09 x cos29) x 3

W = 21.23 J

The work done by the gravity is calculated as follows;

W = Fn cosθ x d

where;

W = mg cosθ x d

W = 1 x 9.8 x cos(0) x 3

W = 29.4 J

The magnitude of the normal force between the block and the wall is calculated as follows;

Fn = mg cosθ

where;

Fn = 1 x 9.8 x cos(0)

Fn = 9.8 N

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The height of the cliff is 104.59 m.

Solution:

Time (t) = 4.62 s

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

Height (h) =?

h = ½gt²

h = ½ × 9.8 × 4.62²

h = 4.9 × 21.3444

h = 104.59 m

Thus, the height of the cliff is 104.59 m

The maximum point of the parabolic trajectory has a completely horizontal component. Since the velocity is only along the horizontal path, we can conclude that the horizontal velocity at the peak of the motion is zero. The initial horizontal velocity can also be determined by measuring the diameter d of the sphere and dividing it by the time t it takes for the sphere to move across the photogate.

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A line that intersects two or more lines in a plane at different points is called a transversal line

A transversal line, in geometry, passes through two lines in the same plane at two distinct points. Intersection caused by transversal forms several angles. These are corresponding angles, alternate interior angles, alternate exterior angles, and co-interior angles.

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Observed temperature increases are best represented when it includes the influences of increases in greenhouse gases.

What are greenhouse gases ?

Greenhouse gases are gases in the atmosphere that affect the earth's energy balance. They cause the so-called greenhouse effect. Carbon dioxide (CO2), methane, and nitrous oxide, the best-known greenhouse gases, occur naturally in the atmosphere at low concentrations. However, since the beginning of the last century, its proportion has increased significantly due to various anthropogenic causes.

Besides these trace gases, which occur only in very low concentrations in the atmosphere, water vapor is probably the most important greenhouse gas. However, its ability to absorb water vapor from the air is directly related to temperature, so it only plays a major role with respect to the natural greenhouse effect. Therefore, water vapor contributes little to man-made climate change.

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A 23.0-turn solenoid of length 6.40 cm produces a magnetic field of magnitude 2.10 m at its center. The current in the solenoid is

B=μ[tex]*i*N/L=2.2[/tex]

so [tex]i=2.2* .062 /(31*u)=4.4*10^{-3}[/tex] / μ

[tex]I=4.4*10^(-3) /[/tex] μ

What is Solenoid?

However, The solenoid is a particular type of electromagnet, and its function is to produce.

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This is not a characteristic of the four Jovian planets in our solar system: That they are higher in average density than the terrestrial planets.

Unlike the terrestrial planets of inner solar system (Mercury, Venus, Earth, and Mars), Jovian planets do not have solid surfaces.

They are also less dense than terrestrial planets and are composed of gases. They have many moons and their mass gives them more gravitational pull. They also have rings.

Characteristics of the Jovian Planet are : They all are gaseous bodies, they have ring systems around them and also they have a large number of natural satellites.

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Explanation:

F = ma

30 = 20m

m = 30/20

m = 1.5 kg