Which sequence lists types of materials in order from least conductive to most conductive?
-superconductor conductor semiconductor insulator
-insulator conductor semiconductor superconductor
-conductor superconductor semiconductor insulator
-insulator semiconductor conductor superconductor

Answer:

its 4 right

i hope it is

Answer:

im pretty positive its 4 , if not its 1

When the pieces of non-stick tape are turned toward one another, an interaction called attraction takes place.

This entails the collision of things brought about by a force. The adhesive material in the tape causes attraction when the non-sticky sides are brought together. However, this eventually wears off, making it the most sensible option. When two charges have opposing charges, they attract one another. two charges being repelled. When two charges have comparable charges, they repel one another. We can therefore infer that they will repel one another when brought close to one another since the two sharp tapes will have the same charge. Two tapes with sharp points are drawn together. They have opposing sorts of charge, as evidenced by this.

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Answer:

If you mean for exercising  then, The Treadmill. Purists may claim that treadmill running isn't "real" running. ...

The Elliptical Trainer. ...

The Stair-Climber. ...

The Cross-Country Skiing Simulator. are all  machines that help you practice agility

Explanation:

A spring of force constant 120 N/m acted up by a constant force of 240N. Then, the elastic potential energy stored in the spring is 240 Nm.

The elastic potential energy stored in the spring is formulated as follows

                                                 PE = ½kx²

Where PE is the elastic potential energy, x is the displacement of the spring from its equilibrium position, and k is the spring force constant.

In this question, the spring force constant is 120 N/m, and the constant force acting on the spring is 240 N. To find the spring displacement, we can use the formula:

F = kx

Where F is the force acting on the spring, x is the displacement, and k is the force constant,

So that:

F = kx

240 N = 120 N/m . x

x = 240 N/120 N/m

x = 2 m

Once x is known, then we can calculate the potential energy of the spring:

PE = ½kx²

PE = ½ (120) (2²)

PE = 60 x 40

PE = 240 Nm

So, the elastic potential energy stored in the spring is 240 Nm.

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The force F1 is equal and opposite to the downward force thus, F1 is equal to 60 N. The force F2 is inclined to 30 ° from leftward force and it is equal to 38.97 N in magnitude.

Force is an external agent acting on a body to deform it or to change its state of motion or rest. Force is a vector quantity and it is characterised by its magnitude and direction.

If two forces acting on a body from the same directions, then the net force will be the sum of these two forces. If they are acting from opposite directions, they will cancel each other in magnitude.

The force F1 is equal and opposite to the force acting downward. Thus its magnitude is 60 N. The force F2 is inclined to 30 ° from horizontal direction.

F2 = 45 cos 30 = 38.9 N.

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The velocity of the ball = 18.84 rad/sec

The centripetal acceleration of the ball = 236.63 m/s²

The centripetal force of the ball = 118.32 N

The mass of the ball = 0.5 kg

The length of the string = 1.5

The time taken = 60 s

The number of rotations = 120

The velocity of the ball can be found using the formula,

              ω = θ / t

where ω is the angular velocity

           θ is the angular rotation

           t is the time taken

Let us substitute the known values in the above equation, we get

               ω = (120 x 2 x 3.14 x 1.5 ) / 60

                    = 1,130.4 / 60

                    = 18.84 radians/sec

The formula for centripetal acceleration is

                α = ω² / r

                    = 18.84² / 1.5

                    = 345.95 / 1.5

                    = 236.63 m / s²

The centripetal force is

              F = mω² / r

                 = 0.5 x 236.63

                 = 118.32 N

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Explanation:

\(molarity \: \: constant \: = 8.3j mol {}^{- 1} {k}^{- 1} \)

\( \frac{3125}{2465.1} = 2465.1 \24651\)

The no of moles are there in a 2,500 cm sample of oxygen at a temperature of 24 °C and a pressure of 125 kPa will be 1.27.

It is the relationship between the pressure,volume and the temperature. Ideal gas equation is found as;

pv=nRt

Given data is;

p(pressure) =125

v(volume) =2500 cm = 25.m³

n(number of moles) =?

T(temperature) = 24°C =24+273=297k

From Ideal gas equation ;

pv=nRt

125×25=n×8.3×297

3125=2465.1 n

n=1.27

Hence,the no of moles will be 1.27.

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a) The motion of the object between 15 s to 30 s is increasing velocity, to a constant velocity and finally a decreasing velocity.

(b) The average velocity of the object between 0 and 15 seconds is 0.167 m/s.

(c) The position of the object at 5.0 seconds is 0.5 m.

(d) Between 30 and 40 seconds, the velocity of the object is decreasing and the object is decelerating.

(a) The motion of the object between 15 s to 30 s can be described as increasing velocity, to a constant velocity and finally a decreasing velocity.

(b) The average velocity of the object between 0 and 15 seconds is calculated as;

average velocity = total displacement / total time

average velocity = (2.5 m - 0 m ) / ( 15 s - 0 s ) = 0.167 m/s

(c) The position of the object at 5.0 seconds is calculated as follows;

at 5.0 seconds, the position of the object is traced from the graph as 0.5 m.

(d) The motion of the object between 30 and 40 seconds is calculated as;

velocity = ( 0 m - 4 m ) / ( 40 s - 30 s ) = - 0.4 m/s

Between 30 and 40 seconds, the velocity of the object is decreasing and the object is decelerating.

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It is true that the accuracy of parallax measurements improves as the distance of the object from the observer increases.

As the distance between the object and the observer increases, the angle of parallax also increases. This means that there is a larger difference in the apparent position of the object when viewed from different positions on Earth's orbit. Therefore, the accuracy of parallax measurements improves as the distance of the object from the observer increases.

The accuracy of parallax measurements actually decreases as the distance of the object from the observer increases. Parallax is a technique used to measure the distance of nearby objects in space by observing their apparent shift in position as seen from different viewpoints (such as Earth at different times of the year). As the distance to the object increases, the apparent shift in position becomes smaller and more difficult to measure accurately.

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Explanation:

a) Velocity and acceleration of a car are parallel when the car is moving along a straight line in the same direction. For example, when a car is gaining speed as it moves forward in a straight line, both velocity and acceleration are directed in the same direction.

b) Velocity and acceleration of a car are anti-parallel when the car is moving along a straight line in the opposite direction. For example, when a car slows down while moving in a straight line, its acceleration is directed opposite to the direction of its velocity, or the other way around.

Answer:

a)

There is only one case where velocity and acceleration are parallel only when they are moving in the same direction.

b)

There are 3 cases where velocity and acceleration are antiparallel.

(i) When both are moving in different direction

   It means :

(ii) When the object is slowing down, where velocity and acceleration are in the opposite direction.

(iii) In case of motion reversal.

Explanation:

The value of force is 1.7 × 10⁻³ N, with the direction opposite to that of the bat's motion.

When an object collides with another object, they exchange energy. For example, a baseball and bat collision or a car collision. When two objects collide, the force of the collision has to be equal on both sides of the collision according to Newton's Third Law. So, to find the value of force, we will apply the equation:

F = ΔP / ΔT

where F is the force, ΔP is the change in momentum, and ΔT is the time of collision. The equation represents the impulse momentum theorem.

Now, let's apply the given values to the above equation.

Final momentum (p2) = mass × final velocity (v2)

p2 = 0.15 kg × (-50 m/s)

p2 = -7.5 kg.m/s

Initial momentum (p1) = mass × initial velocity (v1)

p1 = 0.15 kg × (40 m/s)

p1 = 6 kg.m/s

Change in momentum (ΔP) = p2 - p1

ΔP = -7.5 kg.m/s - 6 kg.m/s

ΔP = -13.5 kg.m/s

Time of collision (ΔT) = 8.0 × 10³ s

Now, putting the values of ΔP and ΔT in the equation of impulse momentum theorem, we get:

F = ΔP / ΔT

F = -13.5 kg.m/s ÷ 8.0 × 10³ s

F = -1.7 × 10⁻³ N

Thus, the value of force is 1.7 × 10⁻³ N, with the direction opposite to that of the bat's motion.

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Answer:

Od- Wooden

Explanation:

It would not make sense if it was non-wood because that make it no a wood base product, OC is not right because its not a a plant that produces wood as its structural tissue and thus has a hard stem.   An OA justT o take or get a supply of wood. so its Od

Answer: im pretty sure it is D

Explanation:

The velocity of the packet when it reaches the ground  is 121.24 m/s.

Velocity is defined as a vector measurement of the rate and direction of motion.

To calculate the velocity of the packet, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1 and solve for v

Hence, the velocity of the packet is 121.24 m/s.

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The building is 1,360 meters away from the observer.

When a sound wave travels towards the building and reflects back as an echo, the total distance covered is twice the distance between the observer and the building.

The speed of sound in air is approximately 340 meters per second. Given that the echo is heard 8 seconds after the sound is created, we can calculate the distance as follows:
Total distance = Speed of sound × Time
Total distance = 340 m/s × 8 s
Total distance = 2,720 meters
Since the total distance covered is twice the distance between the observer and the building, we divide the total distance by 2:
Distance to building = Total distance / 2
Distance to building = 2,720 m / 2
Distance to building = 1,360 meters

Summary: Considering the echo's travel time of 8 seconds and the speed of sound, the building is 1,360 meters away from the observer.

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Answer:

9/20

Explanation:

According to this question, Lucy and JoJo need to make 140 cupcakes for the school dance. Lucy made 35 of the cupcakes while JoJo made 42 cupcakes. This means that in total, (42 + 35) cupcakes has been made by both Lucy and JoJo

That is, 77 cupcakes out of 140 has been made. This is 77/140 i.e. 11/20

Since 77/140 cupcakes has been made, Lucy and JoJo still need to make;

140 - 77 = 63 cupcakes to meet up their target for the school dance.

This means that the fraction left is 63/140

63/140 in its lowest term is 9/20

Hence, 9/20 of the cupcakes still need to be made by Lucy and JoJo.

Explanation: 140 - 35 = 105 - 42 = 63

yare yare daze

I use tusk act 4 main

Answer:

The ways to change the total energy are to either make the hill taller to increase it or make the hill lower to decrease the total energy.

Explanation:

The total mechanical energy of a system is the sum of the total kinetic energy and total potential energy.

Answer:

a. 3.75 s b. 28.125 m

Explanation:

Vi = 15 m/s

Vf = 0 m/s

a = -4 m/s²

i) t = ?

ii) S = ?

i) Using Newton's 1st Eq of Motion

Vf = Vi + at

t = (Vf - Vi) / a

t = (0 - 15) / -4

t = 3.75 s

ii) Using Newton's 3rd Eq of Motion

2aS = Vf² - Vi²

S = (Vf² - Vi²) / 2a

S = (0² - 15²) / 2 x -4

S = 28.125 m

The approximate magnitude of the electric field 4.0mm from the rod surface is 1.1×106N/C, and the approximate magnitude of the electric field 32m from the rod is 2.8×103N/C.

To find the magnitude of the electric field at a certain distance from the rod, we can use Gauss's Law, which states that the electric flux through any closed surface is equal to the charge enclosed by that surface divided by the permittivity of free space. The equation for Gauss's Law is:

ΦE = Qenc/ε0

For a cylindrical Gaussian surface with radius r and length L, the electric flux is given by:

ΦE = E(2πrL)

Substituting this into Gauss's Law and solving for E, we get:

E = Qenc/(2πrLε0)

Since the charge is uniformly distributed over the length of the rod, the charge enclosed by the Gaussian surface is:

Qenc = (Q/L)L = Q

So the equation for the electric field becomes:

E = Q/(2πrLε0)

For the first part of the question, we need to find the electric field 4.0mm from the rod surface. The total distance from the center of the rod to this point is the radius of the rod plus the distance from the rod surface, or 1.0cm + 4.0mm = 1.4cm = 0.014m. Plugging in the given values, we get:

E = (4.4×10-6C)/(2π(0.014m)(0.55m)(8.85×10-12C2/N·m2))

E ≈ 1.1×106N/C

For the second part of the question, we need to find the electric field 32m from the rod. The total distance from the center of the rod to this point is the radius of the rod plus the distance from the rod surface, or 1.0cm + 32m = 32.01m. Plugging in the given values, we get:

E = (4.4×10-6C)/(2π(32.01m)(0.55m)(8.85×10-12C2/N·m2))

E ≈ 2.8×103N/C

So the approximate magnitude of the electric field 4.0mm from the rod surface is 1.1×106N/C, and the approximate magnitude of the electric field 32m from the rod is 2.8×103N/C.

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8000 Joules is the amount of work required to haul up the equipment.

To calculate the work required to haul up the equipment, we need to consider two components: the work done against gravity and the work done against the weight of the rope.

The force due to gravity is given by the weight of the equipment, which is 100 N. The distance over which the force is applied is the height the equipment is being hauled, which is 40 meters. The work done against gravity can be calculated using the formula:

Work = Force × Distance

Work against gravity = 100 N × 40 m = 4000 N·m or 4000 J (Joules)

The weight of the rope can be calculated by multiplying the weight per meter (0.8 N/m) by the length of the rope (40 m):

Weight of the rope = 0.8 N/m × 40 m = 32 N

Since the rope is being hauled up, the work done against the weight of the rope is the same as the work done against gravity. Therefore, the work against the weight of the rope is also 4000 J.

The total work required to haul up the equipment is the sum of the work against gravity and the work against the weight of the rope:

Total work = Work against gravity + Work against rope weight

Total work = 4000 J + 4000 J

Total work = 8000 J

Therefore, it will take 8000 Joules of work to haul up the equipme

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Answer:

√(0.7 * 9.81m/s^2 * r)

Explanation:

To determine the maximum speed at which the 800kg car can travel around the curve, the engineer needs to consider the forces acting on the car as it goes around the curve. Specifically, the engineer needs to consider the centrifugal force and the frictional force between the wheels and the road.

The centrifugal force is the force that acts on an object moving in a circular path and is directed away from the center of the circle. It is given by the equation Fc = mv^2 / r, where m is the mass of the object, v is the velocity of the object, and r is the radius of the curve.

The frictional force between the wheels and the road is given by the equation Ff = μFn, where Ff is the frictional force, μ is the coefficient of friction between the wheels and the road, and Fn is the normal force between the wheels and the road. The normal force is the force that acts perpendicular to the surface of the road and is equal in magnitude to the weight of the car (mg, where g is the acceleration due to gravity).

The maximum speed at which the car can travel around the curve occurs when the centrifugal force and the frictional force are in balance, meaning that they have the same magnitude. In this case, we can set Fc = Ff and solve for v.

Substituting the given values into the equations for Fc and Ff and setting them equal to each other, we get:

Fc = Ff

mv^2 / r = μmg

Solving for v, we find that the maximum speed at which the car can travel around the curve is:

v = √(μgr)

= √(0.7 * 9.81m/s^2 * r)

This is the maximum speed at which the car can travel around the curve without sliding or losing traction. The actual value of v will depend on the radius of the curve, which is not given in the problem.

Answer:

i was doing this is it actually 0.6

Explanation:

;D

The acceleration of the skateboard from its initial velocity to the final velocity over the given time is 0.6m/s².

Motion is simply the change in position of an object over time.

From the First Equation of Motion;

v = u + at

Where v is final velocity, u is initial velocity, a is acceleration and t is time elapsed.

Given the data in the question;

To determine the acceleration of the skateboard, we substitute our given values into the expression above.

v = u + at

10m/s = 4m/s + ( a × 10s)

( a × 10s) = 10m/s - 4m/s

a × 10s = 6m/s

a = 6m/s ÷ 10s

a = 0.6m/s²

Therefore, the acceleration of the skateboard from its initial velocity to the final velocity over the given time is 0.6m/s².

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Complete question is;

Kamal said the distance from the top of the balloon to the ground in the Example image attached is √353 ft. What mistake might Kamal have made?

Answer:

the mistake Kamal made is that she probably used 17 ft as the perpendicular side of the triangle with b as the hypotenuse instead of using 17ft as the hypotenuse

Explanation:

From the image attached, we can see that the distance from the top of the balloon which is blue in color to the ground is denoted by "b".

Now the triangle is a right angle triangle with hypotenuse = 15ft + 2ft = 17 ft; the adjacent side = 8 ft, while the opposite side is "b".

Thus, we can use pythagoras theorem to solve this as;

b = √(17² - 8²)

b = √(289 - 64)

b = √225

b = 15ft

However,we are told Kamal got b as √353 ft.

From inspection of the calculations we just did, if we had used addition instead of subtraction, we would have gotten b = √353 ft.

Thus, we can under that the mistake Kamal made is that she probably used 17 ft as the perpendicular side of the triangle with b as the hypotenuse instead of using 17ft as the hypotenuse.

This question involves the concepts of frictional force and weight.

The magnitude of the force Q for which the drum just starts spinning is "750 N".

The magnitude of force required must be equal to the frictional force between the drum and contact surface:

Q = μR

where,

Therefore,

Q = (0.5)(1500 N)

Q = 750 N

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According to the question an electromagnetic wave in a vacuum moves at the speed of light.

An electromagnetic wave is a type of energy that is created by the vibration of an electric field and a magnetic field. Electromagnetic waves are an invisible form of energy that can travel through a vacuum and other types of matter. They can also travel through the air and other materials, such as metal and water. Electromagnetic waves are responsible for many of the phenomena we observe in our everyday lives, such as light, sound, and radio. Electromagnetic waves have a wide range of frequencies, ranging from high-energy gamma rays to low-energy radio waves. Each type of electromagnetic wave has its own unique properties, such as wavelength, frequency, and amplitude. Electromagnetic waves are also responsible for the transmission of information through cell phones, radio waves, television waves, and microwaves.

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Answer:

Let's briefly summarize the major features of resistors in series:

Series resistances add together to get the equivalent resistance (Equation 10.3. 2): RS=R1+R2+R3+... ...

The same current flows through each resistor in series.

Individual resistors in series do not get the total source voltage, but divide it.

Answer:

0.36 m

Explanation:

The moment of inertial of a wheel can be calculated as

Where r is the radius of the wheel and m is its mass.

Solving the equation for r, we get

So, replacing I by 0.13 kg m2 and m by 0.98 kg, we get

Therefore, the radius of the wheel is 0.36 m

The graph points are described below.

What is kinetic energy ?

The movement of an object or a subatomic particle exhibits the kinetic energy, often known as the energy of motion. Every atom and object in motion contains kinetic energy. Kinetic energy is present whenever something moves, such as when a person walks, a baseball soars through the air, a piece of food falls from a table, or a charged particle moves in an electric field.

What is potential energy ?

A sort of energy that can be stored but is reliant on the locations of various system components in relation to one another is known as potential energy. A spring gains potential energy when it is stretched or compressed.

P.E= 1/2Kn²

K.E = 1/2 mv²

since the sum will be always constant

At point A.E. is the maximum displacement and the minimum kinetic energy

At point C displacement is maximum so kinetic energy is maximum

At point, B, D it sum of both since displacement is just half of the maximum

so half of the P.E will be converted to K.E.

Therefore, graph points are described below.

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