what tools could you choose if you wanted to see something far away

Answer:

ok

Explanation:

solid- molecules are close together and vibrating

liquid - molecules are loser, faster moving and take the shape of its container

gas- fast moving molecules and take whatever shape they want (like a room or the air outside)

Explanation:

Solids: The inter-molecular attraction force is the highest and the inter-molecular distance is the least. Solids have definite shape and volume.

Liquids: The inter-molecular attraction force is less than that of solids and the inter-molecular distance is more than solids. Liquids have definite volume but no definite shape.

Gases: The inter-molecular attraction force is the least and the inter-molecular distance is the highest. Gases have no definite shape or volume.

If a motor car is traveling at a steady speed of 30m/s then the work done by the car each second against the force of air resistance is 48,000 J.

To calculate the work done by the car each second against the force of air resistance, we need to use the formula for work, which is:

work = force x distance

In this case, the distance is not given, but we know that the car is traveling at a steady speed of 30m/s. We can use this information to calculate the distance traveled in one second:

distance = speed x time
distance = 30m/s x 1s
distance = 30m

Now we can calculate the work done by the car against the force of air resistance:

work = force x distance
work = 1600N x 30m
work = 48,000 J

Therefore, the work done by the car each second against the force of air resistance is 48,000 J.

If you need to learn more about speed click here

https://brainly.com/question/4931057

#SPJ11

The gravitational force exerted on block B is most nearly 20N.

To calculate the gravitational force exerted on block B, we need to use the formula for gravitational force, which is F = m * g, where F is the gravitational force, m is the mass of the object, and g is the acceleration due to gravity. The mass of block B is given as 2kg, and the standard acceleration due to gravity is approximately 9.81m/s².

Calculation steps:
1. Write down the formula: F = m * g
2. Plug in the given values: F = 2kg * 9.81m/s²
3. Calculate the gravitational force: F = 19.62N

Since 19.62N is nearly 20N, the gravitational force exerted on block B is most nearly 20N.

To know more about gravitational force visit:

https://brainly.com/question/29742605

#SPJ11

ANSWER:

7 m/s

STEP-BY-STEP EXPLANATION:

Given:

Initial velocity (u) = 4 m/s

Acceleration (a) = 1.5 m/s^2

Time (t) = 2 s

We can calculate the final velocity using the following formula:

We replace and calculate the value of the final velocity:

The final velocity is equal to 7 m/s.

Option C) decreasing Hernando’s pushing force will most likely decrease Tom’s acceleration on the swing.

The definition of acceleration is a change in the rate of motion, speed, or motion. An instance of acceleration is increasing your using pace from forty-five to 55 to merge with site visitors.

Accelerations are vector portions. The orientation of an object's acceleration is given with the aid of the orientation of the net force acting on that item. Acceleration is a vector quantity this is defined as the rate at which an object modifications its speed. An item is accelerating if it's far converting its velocity.

Speed ​​and acceleration are basic terms of motion. speed is the distance protected with the aid of an object in unit time, whilst acceleration is the charge of change of speed.

Learn more about acceleration here:-https://brainly.com/question/460763

#SPJ9

Answer:

Twice the work needed to lift the 20cm object

Explanation:

Work done is derived using the expression below;

  Work done  = Force x distance

For this problem, we are lifting through a vertical height;

  Work done  = mg x h

 mg is the weight of the body;

Since both bodies have the same weigh;

   W1 is the workdone to lift 20cm

   W2 is the workdone to lift 40cm

   For the first lift;

         W1  = (mg) x 20cm

         (mg)  = \(\frac{W1}{20}\)  

   For the second lift;

          W2  = (mg)  x 40cm

   Since they both have the same weight

          (mg)  = \(\frac{W2}{40}\)  

Equating the two weights;

      \(\frac{W1}{20}\)   =  \(\frac{W2}{40}\)  

     20W2  = 40W1

          W2  = \(\frac{40W1}{20}\)   = 2W1

The drift mobility of electrons in Cu is the ratio of the electric field to the charge carried by an electron and the time it takes for an electron to reach from one end of a conductor to the other under an applied electric field.

The Hall coefficient is defined as \(RH = (1/ne) * (dVH/dB)\) where n is the charge density, e is the charge of an electron, VH is the Hall voltage, and B is the magnetic field. To calculate the drift mobility of the electrons in Cu, we will first determine the charge density n using the Hall coefficient.

We can then use the conductivity and charge density to calculate the drift mobility. Given, Hall coefficient \(RH = 0.45 × 10^-10 m^3/A s\)  and Conductivity \(σ = 6.5 /ohm\) meter at a temperature of 400K. (Magnetic field)

To know more about electrons visit:

https://brainly.com/question/12001116

#SPJ11

The scientists found most  surprising when they saw this image of Pluto  photographed by the new horizons spacecraft in 2015 is that Pluto and its satellites are much more complicated than we anticipated.

Pluto and its satellites are much more intricate than we anticipated. It is simply remarkable how active Pluto's surface is right now and how young certain of its surfaces are. All pre-flyby models are disproved by Pluto's atmospheric hazes and lower atmospheric escape rate than expected.

A ancient water ice ocean that once existed inside of Charon may have frozen long ago, according to the planet's massive equatorial extensional tectonic belt. A water-ice ocean may still exist inside Pluto today, according to additional data from New Horizons.

Learn more about Pluto here:

https://brainly.com/question/13402868

#SPJ1

The total horizontal force on the driver at a speed of 20.0 m/s on the same curve would be 320 N.

When a car moves in a horizontal circle, it experiences a centripetal force directed towards the center of the circle. In this case, the centripetal force is provided by the friction between the car's tires and the road surface. The magnitude of the centripetal force can be calculated using the formula F = mv²/r, where F is the centripetal force, m is the mass of the car, v is the speed of the car, and r is the radius of the circle.

Since the radius of the circle is constant, the centripetal force is directly proportional to the square of the speed. Therefore, when the speed is increased from 14.0 m/s to 20.0 m/s, the centripetal force increases by a factor of (20/14)² = 2.04.

The total horizontal force on the driver is the vector sum of the centripetal force and the horizontal force due to any other sources such as air resistance. Since the problem states that the horizontal total force on the driver has a magnitude of 138 N at a speed of 14.0 m/s, we can assume that the horizontal force due to other sources is negligible. Therefore, at a speed of 20.0 m/s, the total horizontal force on the driver would be 138 N + 2.04 × 138 N = 320 N.

For more questions like Force visit the link below:

https://brainly.com/question/12969607

#SPJ11

Answer:

its not B1 or A1. must be A2 or C2

Explanation:

For a swimming pool having dimensions 32 m, 8 m, and a flat bottom:

(a) The force exerted by the water on the bottom is 4,259,360 N.

(b) The force exerted by the water on each end is 226,496 N.

(c) The force exerted by the water on each side is 906,944 N.

To determine the force exerted by the water in the swimming pool, we need to calculate the pressure exerted by the water at various points.

(a) Force exerted by the water on the bottom:

The force exerted by the water on the bottom of the pool is equal to the pressure exerted by the water multiplied by the area of the bottom.

The formula gives the pressure exerted by a fluid: pressure = density * gravity * depth

The density of fresh water is approximately 1000 kg/m³, and the acceleration due to gravity is approximately 9.8 m/s². The depth of the water is 1.70 m.

So, the pressure exerted by the water on the bottom = (1000 kg/m³) * (9.8 m/s²) * (1.70 m) = 16660 Pa (Pascals)

The area of the bottom of the pool is equal to the length multiplied by the width: 32.0 m * 8.0 m = 256.0 m²

Therefore, the force exerted by the water on the bottom = pressure * area = 16660 Pa * 256.0 m² = 4,259,360 N (Newtons)

(b) Force exerted by the water on each end:

The force exerted by the water on each end of the pool is equal to the pressure exerted by the water multiplied by the area of each end.

The pressure exerted by the water on the ends will be the same as the pressure on the bottom because the depth is the same.

The area of each end of the pool is equal to the width multiplied by the depth: 8.0 m * 1.70 m = 13.6 m²

Therefore, the force exerted by the water on each end = pressure * area = 16660 Pa * 13.6 m² = 226,496 N (Newtons)

(c) Force exerted by the water on each side:

The force exerted by the water on each side of the pool is equal to the pressure exerted by the water multiplied by the area of each side.

The pressure exerted by the water on the sides will also be the same as the pressure on the bottom and ends.

The area of each side of the pool is equal to the length multiplied by the depth: 32.0 m * 1.70 m = 54.4 m²

Therefore, the force exerted by the water on each side = pressure * area = 16660 Pa * 54.4 m² = 906,944 N (Newtons)

To learn more about the Pressure, visit:- https://brainly.com/question/28012687

#SPJ11

Answer:

Explanation:

An atom losses or gains electrons to fill the outermost shell. In this process , ionic bonds are formed. Chemical bonds are formed when electrons are shared.

The object distance at which the magnification will be +0.80 for a diverging lens with a focal length of magnitude 13 cm is:

do = -21.67 cm

To solve this problem, we can use the formula for magnification:

m = -di/do

Where m is the magnification, di is the image distance, and do is the object distance.

We are given that the focal length of the lens, f, is 13 cm. For a diverging lens, the focal length is negative, so we can write:

f = -13 cm

We are also given that the magnification, m, is +0.80. Substituting these values into the formula above, we get:

0.80 = -di/do

Solving for di, we get:

di = -0.80do

Now we can use the lens equation to relate do and di:

1/do + 1/di = 1/f

Substituting the values we know, we get:

1/do + 1/(-0.80do) = 1/(-13 cm)

Simplifying and solving for do, we get:

do = -21.67 cm

However, we need to express our answer with the appropriate units, which are centimeters. Therefore, the object distance at which the magnification will be +0.80 for a diverging lens with a focal length of magnitude 13 cm is:

do = -21.67 cm

(Note that the negative sign indicates that the object is on the opposite side of the lens from the observer, which is consistent with the fact that we are dealing with a diverging lens)

For more information on lens and their focal length refer to https://brainly.com/question/25779311

#SPJ11

Explanation:

The energy of a wave is given by :

\(E=\dfrac{hc}{\lambda}\)

Where

h is Planck's constant

c is the speed of light

\(\lambda\) is wavelength

Energy is inversely proportional to wavelength. Also, the relation between frequency and wavelength is inverse.

If the frequency is high, the wavelength will be shorter.

Hence, the correct options are :

Higher frequencies have shorter wavelengths.

Shorter wavelengths have lower energy.

Lower frequencies have lower energy.

The turbine requires an average torque of 809,900 N.m to accelerate it from rest to a rotational velocity of 190 rad/s in 23 s.

Between the pivot point and the location where the force is delivered, measure the distance, r. Calculate the angle between the vector connecting the force's application point and the pivot point and the direction of the applied force. You may calculate the torque by multiplying r by F and sin.

The relationship between the turbine's rotational inertia and its angular velocity and torque may be found using the rotational kinetic energy formula:  K_rot = (1/2) * I * w²

We can rearrange this equation to solve for the torque (T):

T = (I * w^2) / 2

We may first get the angular acceleration (alpha) by using the following formula to determine the torque required to accelerate the turbine from rest to a rotating velocity of 190 rad/s in 23 s.

alpha = w / t

where t is the time taken to reach the final angular velocity.

alpha = (190 rad/s) / (23 s) = 8.261 rad/s²

Next, we can use the formula for torque to calculate the average torque needed:

T = (I * w²) / 2

T = (38 kg.m²) * (190 rad/s)² / (2)

T = 809,900 N.m

To know more about torque visit:-

https://brainly.com/question/29024338

#SPJ1

Answer: To calculate the pressure at the surface of a fluid, we need to know the density of the fluid, the acceleration due to gravity, and the height of the fluid column above the surface. This can be represented by the following formula:

pressure = density x gravity x height

where pressure is the pressure at the surface of the fluid, density is the density of the fluid, gravity is the acceleration due to gravity, and height is the height of the fluid column above the surface.

Answer:

I believe your answer is: force

Explanation:

Answer:

Accurate at 99.9999746%

Explanation:

First of all, let's calculate how many seconds we have in a year which has 365 days.

1day = 24 × 60 × 60 seconds = 86400 s

Thus, for 365 days, we have;

86400 × 365 = 31536000 seconds

Now, since 1 year has 31536000 seconds, let's find the ratio of efficiency.

We are told that the watch manufacturer claims that its watches gain or lose no more than 8 seconds in a year. Thus, efficiency is given by;

Efficiency = (8/31536000) × 100% = 0.00002536783 %

Thus, it will be be accurate at;

100% - 0.00002536783% ≈ 99.9999746%

Explanation:

t = usin©/g

Where t is the time to reach the maximum height

Time spent in air is T = 2t

Hence, T = 2usin©/g

T = 2 x 20 x sin 65°/ 9.8

T = 3.69s

The spring constant of that particular spring is 1.916N/cm. The spring constant k of the fishing scale can be calculated using Hooke's Law, which states that the force (F) of a spring is directly proportional to the extension (x) of the spring.

We can thus write an equation as F = kx, where k is the spring constant. Using the given information, we can solve for the spring constant k as follows:

Find the Force Increase: 28N is the initial force measured on the spring. An increase of 14.6cm in the length of the spring will result in an additional force, F.

Calculate the spring constant: The relationship between the additional force and the additional length is given by the equation: F = k(Delta x), where k is the spring constant. So, k = F/ Delta x = 28N / 14.6cm = 1.916N/cm.

Therefore, the spring constant of that particular spring is 1.916N/cm.

To know more about Hooke's Law, click here:

https://brainly.com/question/30379950

#SPJ4

Answer: b

Explanation: 320/the square root of 64

The speed of light (c) in air is 2.99792 × 10^8 m/s, and the wavelength of visible light (λ) is 5 × 10^-7 m.

We can use the formula for the speed of light, which is:

c = λν

where ν is the frequency of the light wave.

Solving for ν, we get:

ν = c / λ

Substituting the values we have:

ν = (2.99792 × 10^8 m/s) / (5 × 10^-7 m)

ν = 5.99584 × 10^14 Hz

Therefore, the frequency of the light wave is approximately 5.99584 × 10^14 Hz.

The differential equation which describes the temperature of the object over time is;

dH/dt = -k (H-S), where k = 0.97. The solution to this differential equation is given by H(t) = S + 65e^(-0.97t).

Newton’s law of heating and cooling is an application of the first law of thermodynamics. The law suggests that the rate of change of temperature of an object is proportional to the difference between its temperature and the temperature of the surroundings.

A warm object is placed in a refrigerator where the surrounding temperature is cooler, and the temperature of the object decreases. This phenomenon can be explained using differential equations. Given that H(t) is the temperature of the object being cooled and S is the surrounding temperature, the differential equation which describes the temperature of the object over time is given by;dH/dt = -k (H-S)

where k is the constant of proportionality.To solve this differential equation, we can use separation of variables, such that;

dH/dt = -k (H-S)dH/(H-S) = -k dt

Integrating both sides, we get;ln|H-S| = -kt + Cwhere C is the constant of integration.Rearranging, we have;

|H-S| = e^(-kt+C)

At time, t = 0, H = 100 and after 30 minutes the object is 75 degrees; t = 0.5 hours, H = 75. We can use these values to solve for C and k as follows;

|100-35| = e^(C) => 65 = e^(C)     …(1)

and|75-35| = e^(-0.5k+C) => 40 = e^(C) e^(-0.5k) => e^(-0.5k) = 40/65 => e^(-0.5k) = 8/13 => -0.5k = ln(8/13) => k = -2ln(8/13) => k = 0.97    …(2)

Substituting equation (1) into (2), we get;H-S = 65e^(-0.97t)  =>  H(t) = S + 65e^(-0.97t)

Therefore, the differential equation which describes the temperature of the object over time is;dH/dt = -k (H-S), where k = 0.97.

The solution to this differential equation is given by H(t) = S + 65e^(-0.97t).

The differential equation which describes the temperature of the object over time is;

dH/dt = -k (H-S), where k = 0.97. The solution to this differential equation is given by H(t) = S + 65e^(-0.97t).

Learn more about temperature at: https://brainly.com/question/27944554

#SPJ11

When a person is inside an accelerating frame that is also contained within another accelerating frame, the force experienced is a combination of the forces from both frames. This is due to the principle of superposition, which states that the net force acting on an object is the vector sum of all individual forces.

In this situation, we consider two types of forces: inertial forces and gravitational forces. Inertial forces result from acceleration and can be described using Newton's second law (F = ma), where F is force, m is mass, and a is acceleration. Gravitational forces, on the other hand, are due to the presence of a massive body.

To find the total force experienced by a person in the described scenario, we first determine the net acceleration of each frame. This is achieved by vector addition of the individual accelerations. Next, we calculate the inertial force experienced by the person in each frame using Newton's second law. Finally, we add these forces along with any gravitational forces that may be present to obtain the total force.

The net force experienced by the person depends on the specific accelerations of each frame and the individual's mass. As a result, it can vary in both magnitude and direction. This complex interplay of forces highlights the importance of understanding the underlying physics when analyzing situations involving multiple accelerating frames.

Learn more about Newton's second law here:

https://brainly.com/question/13447525

#SPJ11

Charged matter experiences a force when it is exposed to an electromagnetic field due to the physical property of electric charge. Positive or negative charges can exist in an electric field. Contrary charges attract one another while like charges repel one another.

1) a sphere 8 cm in diameter has a charge of 4 uc placed on its surface. what is the electric field intensity a) at the surface, b) 2 cm outside the surface, c) 2 cm inside the surface?

"Ф = 4.5176x10⁵ N . m² / C"

In this instance, two formulas are required to determine the sphere's electric flux.

First, the electric flow is determined using the following formula:

Ф = E * A (1) 

Where:

Field of electricity

A: The sphere's diameter

We use the following formula to determine the electric field E:

E = K * q / r² (2)

If we switch out (2) for (1), we get the following:

Ф = K * q * A / r² (3) 

Finally, we need to understand the formula for calculating a sphere's surface area, which is as follows:

A = 4πr² (4) 

Substituting into (3):

= K * Q * 4r2 / r2 disregarding r2

Ф = K * Q * 4π (5)

All that is left to do is swap out the given values and find the sphere's electric flux:

Ф = 8.98755x10⁹ * 4x10⁻⁶ * 4 * π

Ф = 4.5176x10⁵ N . m² / C

To know more about charge, click on the link below:

https://brainly.com/question/21678823

#SPJ4

The filling time of the gas tank can be determined by considering the relationship between the volume of the tank and the discharge rate of gasoline.

To find the filling time, we need to determine how long it takes for the nozzle to discharge enough gasoline to fill the entire tank.

First, let's consider the units involved. The volume of the tank is given in liters (l) and the discharge rate of gasoline is given in liters per second (l/s).

The filling time can be calculated by dividing the volume of the tank (v) by the discharge rate (v˙):

Filling time = v / v˙

For example, let's say the volume of the tank is 50 liters and the discharge rate is 5 liters per second. The filling time would be:

Filling time = 50 l / 5 l/s = 10 s

So it would take 10 seconds to fill the tank in this example.

In summary, the correct relation for the filling time in terms of the volume of the tank (v) and the discharge rate of gasoline (v˙) is given by the formula: Filling time = v / v˙.

To know more about gasoline visit:

https://brainly.com/question/14588017

#SPJ11

The true statements about electric motion are:

An electrical device that transforms electrical energy into mechanical energy is an electric motor. The majority of electric motors work by creating force in the form of torque imparted to the motor shaft through the interplay of the magnetic field of the motor and electric current in a wire winding.

Electric generators function with a reversed power flow, transforming mechanical energy into electrical energy, and are mechanically identical to electric motors.

Electric motors can be powered by alternating current (AC) sources like a power grid, inverters, or electrical generators or by direct current (DC) sources like batteries or rectifiers.

Learn more about electric motor here:

https://brainly.com/question/15409160

#SPJ6

An object which starts from its resting place & accelerates at a speed of 4 rad/sec², the angular displacement is 8 rad.

An object's angular displacement is described in the following:

Angle displacement is equal to θ\(f\)-θ\(i\).

The following methodology must also be applied to determine angular displacement when the object's acceleration, starting velocity, and time are known:

θ=ωt+ 1/2αt²

[where θ= the angular displacement of an object,

ω= initial angular velocity,

α= angular acceleration,

t= time]

In this case, the object starts from the rest position.

So, the initial angular speed, ω= 0 rad/sec

Provided angular acceleration ,α = 4 rad/sec²

Time ,t= 4 sec

So, θ= \(0*4+ (1/2)*4*4\)

⇒θ= 0+ 8

⇒θ= 8 rad

Therefore, it is concluded that the angular displacement is 8 rad.

Learn more about angular displacement here:

https://brainly.com/question/13649539

#SPJ4

The pressure when the balloon has grown to 175 L is approximately 52 kPa.

Boyle's law simply states that "the volume of any given quantity of gas is inversely proportional to its pressure as long as temperature remains constant.

Boyle's law is expressed as;

P₁V₁ = P₂V₂

Where P₁ is Initial Pressure, V₁ is Initial volume, P₂ is Final Pressure and V₂ is Final volume.

We know that P1 = 101 kPa, V1 = 90 L, and V2 = 175 L.

Solving for P2:

P2 = (P1 × V1) / V2

P2 = (101 kPa × 90 L) / 175 L

P2 = 52 kPa

Therefore, the final pressure is approximately 52 kPa.

Learn more about Boyle's law here: brainly.com/question/1437490

#SPJ1

(ii) The distance covered by the antelope after 17 s

v = v₀ + a • t

25 = 0 + 2a

a = 12.5 m/s²

S = ½ • a • t² + v • t

S = ½(12.5)(2)² + 25(14.5)

S = 387.5 m

(iii) How far the cheetah and the antelope after 17 s

v = v₀ + a • t

29 = 0 + 2a

a = 14.5 m/s²

Sc = ½ • a • t² + v • t

Sc = ½(14.5)(2)² + (29)(15)

Sc = 464 m

Total distance between antelope and cheetah after 17s

∆S = S - Sc + 100

∆S = 387.5 - 464 + 100

∆S = 23.5 m