consider a pipe at a constant temperature whose radius is greater than the critical radius of insulation. is it true that the rate of heat loss from the pipe increases when some insulation is added to the pipe?

Momentum=mass*velocity=40,000*11=440,000 kg m/s.

The word "momentum" is frequently used in sports. A squad that is moving forward and has momentum will be difficult to stop. A team that is genuinely moving forward and gaining momentum will be challenging to stop.

A physics phrase, momentum describes the amount of motion that an item has. The momentum belongs to a sports team that is actively playing. An object has momentum if it is moving or in motion.

The definition of momentum is "mass in motion." Since every item has mass, if it is moving, it must have momentum because its mass is in motion.

Therefore, Momentum=mass*velocity=40,000*11=440,000 kg m/s.

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Ferredoxin transfers an electron to NADP+ to form NADPH.

Ferredoxin is a small iron-sulfur protein that is involved in electron transfer in photosynthesis. It receives an electron from photosystem I and then transfers it to NADP+ to form NADPH. This process is known as the light-dependent reactions of photosynthesis, and it is crucial for the production of ATP and the reduction of carbon dioxide to form glucose.

In summary, ferredoxin transfers an electron to NADP+ to form NADPH, which is then used in the light-independent reactions of photosynthesis to produce glucose.

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The Speed of water flowing by 2.76 diameter is 0.1634m/s.

Given -

Diameter= 2.76cm

Amount = 20l

time= 1.15 min

The flow of water is continuous and remains unaffected with distribution of mass.

To compute the speed of the water leaving the end of the hose-

V= 2.76 + 1= 3.76cm

For 20 l equivalent length is 3.76cm

For 1 l equivalent length(x) = 3.76/20

x= 0.188

\(Speed = distance /time\)

= 0.188/1.15

=0.1634m/s

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Answer:

2/B

6/E

7/F

12/6

Explanation:

Hope this helps i dont know ither i will put if i think of them

Answer:

60.18 N

Explanation:

Given that:

The force applied on the sled = 100 N

Suppose, the angle between the sled rope and the ground = 53°

The horizontal force which acts  in the horizontal direction can be expressed as:

\(F_x = F \ cos \theta\)

\(F_x = 100 \ cos (53)\)

\(F_x = 60.18 \ N\)

But if the angle between the sled rope is parallel to the ground. Then, we use an angle on a straight line which is = 180°

\(F_x = F \ cos \theta\)

\(F_x = 100 \ cos (180)\)

= 100 × -1

= -100 N

The given vector has a magnitude of 765m and an angle of 143°. To determine the x-component of A, we must first determine the quadrant of the angle.

Since the angle is greater than 90° and less than 180°, it is located in the second quadrant. Therefore, we use the x-axis as our initial side, and the resulting equation is Ax=-765cos53.

This equation states that the x-component of A is equal to -765 multiplied by the cosine of 53. This can be used to calculate the horizontal component of a vector in a two-dimensional plane.

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(a) The car travels 1500 feet during its first 10 seconds.

(b) It takes approximately 5.774 seconds to travel half the distance in part (a).

(a) To find the distance traveled by the car during its first 10 seconds, we need to integrate the velocity function over the interval [0, 10]. The velocity function v(t) is given as 3t^2 ft/sec. Integrating this function gives us the displacement function s(t), which represents the distance traveled. The integral of 3t^2 with respect to t is t^3, so the displacement function is s(t) = t^3. Plugging in t = 10, we find s(10) = 10^3 = 1000 ft. Therefore, the car travels 1000 feet during its first 10 seconds.

(b) We need to find the time it takes for the car to travel half the distance found in part (a), which is 1000/2 = 500 feet. We set up the equation s(t) = 500 and solve for t. Using the displacement function s(t) = t^3, we have t^3 = 500. Taking the cube root of both sides, we find t = ∛500 ≈ 5.774 seconds. Thus, it takes approximately 5.774 seconds for the car to travel half the distance in part (a).

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Answer:

The net force is 100 N to the right.

Explanation:

To solve this problem, we simply add together the forces.  Since we know that there is a greater force to the right, we will designate this as the positive direction and the left as the negative direction.

To find the net force, let's add together the two forces we are given using our new positive/negative designations:

+150 N right - 50 N left

Now, we just perform simple subtraction to get:

100 N right

Therefore, the answer is that the net force is 100 N to the right.

Hope this helps!

If the dart is thrown horizontally and there is no air resistance the dart needs 0.5 seconds to strike the wall or dartboard

The primary indicator of an object's position and speed is its velocity. It is the distance that an object travels in one unit of time. The displacement of the item in one unit of time is the definition of velocity.

d = vt

where d represents the distance, v the speed, and t the time.

The dart's horizontal velocity in this scenario is 10 m/s, while the distance to the dartboard is 5 metres. As a result, the time it takes the dart to strike the wall or dartboard is:

d/v = 5/10 = 0.5 seconds, where

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The first thing the student group should do is research the amount of electricity the school uses and where it comes from.

The students should then develop a plan to reduce the amount of electricity the school uses. The plan should include measures to reduce the school's reliance on electricity, such as promoting the use of solar power or wind power. The plan should also include measures to increase the efficiency of the school's electricity use, such as retrofitting the school's lighting or installing energy-efficient appliances. The students should then present their plan to the school administration and work with them to implement the plan.

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Answer:

Explanation:

The object does not carry a charge

Answer:

Explanation:

See the attachment for the details.  A right triangle is formed to find the hypotenuse of the two legs consisting of the actual driving distances and times.  The hypotenuse gives the vector information for the displacement at the end of 8 hours of driving.  

The individual driving times and distances are summed to provide:

(a) How far did he travel?

103 km

(b) What was his average speed?

12.88 km/h

(c) What was his displacement?

73.82 km

(d) What was his average velocity?

9.228 km/h

Answer:

A pie is cooked in an oven at 200 °C. The aluminium film that covered the pie can be touched soon after it is removed while the pie is still dangerously hot, explain this.

Explanation:

Answer:

the elongation of the spring is 0.3186 m.

Explanation:

The force exerted by the spring on the block of wood when it is in equilibrium is equal to the weight of the block of wood, which is given by:

F_spring = F_gravity

where F_spring is the force exerted by the spring and F_gravity is the weight of the block.

The weight of the block of wood can be calculated as:

F_gravity = m * g

where m is the mass of the block and g is the acceleration due to gravity.

The mass of the block can be calculated using its density and volume:

m = ρ * V = ρ * A * h

where ρ is the density of the block, A is the cross-sectional area of the block, and h is the height of the block.

The height of the block can be calculated as:

h = m / (ρ * A) = 4.58 kg / (625 kg/m^3 * A)

The cross-sectional area of the block is not given, so we cannot calculate it directly. However, we can use the fact that the block is in equilibrium to find the elongation of the spring.

When the block is in equilibrium, the force exerted by the spring is balanced by the weight of the block. The elongation of the spring (∆L) can be calculated using Hooke's Law:

F_spring = k * ∆L

where k is the spring constant.

Substituting the values we have:

F_gravity = F_spring

m * g = k * ∆L

Solving for ∆L:

∆L = (m * g) / k

We can calculate the spring constant using the given value of the spring's constant k:

k = 140 N/m

Substituting the values we have:

∆L = (m * g) / k = (4.58 kg * 9.8 m/s^2) / 140 N/m

∆L = 0.3186 m

Therefore, the elongation of the spring is 0.3186 m.

High (in m) a hill can a car coast up is  45.92m, if friction is negligible and its initial speed is 108 km/h

Initial velocity V = 108 Km/hr

V = 30m/s

Let mass of car m

Kinetic energy = 1/2 m\(v^{2}\)

potential energy = mgh

by energy conservation,

h = \(v^{2}\)/2g  = 45.92m

Friction is the force preventing moving in the same direction between moving components of solid surfaces, fluid layers, and sliding materials. There are numerous types of friction:

Dry friction prevents the relative lateral motion of two in touch solid surfaces. Static friction (also known as "stiction") occurs between stationary surfaces and is further subdivided into kinetic friction (also known as "stiction") between moving surfaces. Except for atomic or molecule friction, the interaction of surface features known as asperities is the main cause of dry friction (see Figure 1).

Fluid friction can occur when layers of a viscous fluid move in close proximity to one another. Lubricated friction is the friction between two solid surfaces that is caused by a lubricating fluid.

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Answer:

C. Cables transmit infrared waves over longer distances.

Explanation:

A.pex

Answer:

The answer is C.Cables transmit infrared waves over longer distances.

Explanation:

I took AP EX quiz.

Answer:

A national park is one such protected area for the special species of flora and fauna of the region. In Nepal, there are numerous national parks to conserve and protect wildlife and their natural habitat.

The type of circuit shown in the diagram is a closed series circuit. The Option C.

The circuit diagram illustrates a closed series circuit, where the components are connected in a series, forming a single loop. In a closed series circuit, the current flows through each component in sequence, meaning that the current passing through one component is the same as the current passing through the other components.

The flow of current is uninterrupted since the circuit forms a complete loop with no breaks or open paths. Therefore, the correct answer is a closed series circuit.

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The dimensions of the lightest open-top right circular cylindrical can be  6.82cm.

The following is the formula to get the volume of something like a hollow cylinder: The volume of a hollow cylinder is equal to (R2 - r2) h cubic units, where "R" denotes the cylinder's outer radius, "r" its inner radius, and "h" its height. Similar to a prism but having circular bases, a cylinder is a 3-D shape.

Given, volume of the cylinder = 1000cm³

volume of cylinder = πr²h

The bottom and sides are included in the surface area:

SA = πr²+2πrh

The second equation may be written as, after solving the first equation for h.

 SA = πr² +2πr(V/(πr²)) = πr² +2V/r

Where the derivative is 0, the smallest area for the volume will be discovered.

 d(SA)/dr = 2πr -2V/r² = 0

The can radius is thus,

r = ∛(V/π)

and it's height, h = V/(π(V/π)^(2/3)) = ∛(V/π) = r

The dimensions for the specified volume are

r = h = ∛(1000/π) ≈ 6.82cm

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Initial velocity: 500 m/s Height: 19.6 m

Therefore, the y-direction motion equation is:

19.6/4.9 =t 2 t 2 =4 t=2s, where s=ut+ 1/2 at 2 19.6=0+ 1/2 9.8t 2

Consequently, the x-direction is the equation of motion.

s=ut+ 1/2 at 2

s=500×2=1000m

where u=5000m/s, t=2s, and a=0

Thus, it hits the earth at a distance of 1000 metres from the base of the cliff.

Why does velocity matter?

The motion's rate and direction are measured vectorially via this. Simply said, velocity is the rate of movement in a specific direction. As an illustration, think of the speed of a car driving north on a highway or the speed at which a rocket takes off.

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We know the power of the laser beam, so we know the energy per second that it delivers. The wavelength of the light tells us the energy of every photon, so we can use that to calculate the number of photons delivered per second

The energy of each photon is E = hf= hc/A (1.99 x 1025 J.m)/X.

The power is the total energy per second and the total energy Et is the number of photons N

times the energy E of each photon. A = 10.6 x 10 m, so E = (1.99 x 1025 J.m)/(10.6 x 10 m) = 1.88 x 1020 J

N/t=P/E = (0.100 x 103 W)/(1.88 x 10-20 J) = 5.32 x 1021 photons/s

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Answer:

:) :::::::::::::::::::::::::::::::))))

Answer:

F = K Q1 Q2 / R^2         force between 2 charges separated by R

F2 / F1 = (R1 / R2^2)    dividing equations

F2 / F1 = (R1 / 3 R1)^2 = 1/3^2 = 1/9

The force would be reduced by a factor of 9

3.8 / 9 N = .42 N

Answer:

Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure.

It would be 3: a spring descending a set of steps. As kinetic energy is the energy of motion, it must be in motion.

Since it is moving, it would be a spring moving down a set of steps. A stretched spring, a compressed spring, and a spring at the top of a set of steps are all in motion.

Kinetic energy is a type of power that a moving object or particle possesses.

An item accumulates kinetic energy when work, which involves the transfer of energy, is done on it by exerting a net force. A moving object or particle has kinetic energy, which depends on both its mass and its rate of motion.

Therefore, It would be 3: a spring descending a set of steps. As kinetic energy is the energy of motion, it must be in motion.

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question

mass = 1 kg

acceleration = 4 m/s²

We have

force = 1 × 4 = 4

We have the final answer as

Hope this helps you

Answer:

program explanation

Explanation:

program explanation

The set of activities having a long-term aim should be a program.

A program refers to a set of instructions that a computer follows in order to perform a specific task. At the time When you program a computer, you provide it a set of instructions to make it able to perform a particular task.

So here the program should be considered.

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The energy of X-rays emitted by an element depends on its atomic number, and the strongest peak in the X-ray spectrum can help determine the atomic number of the metal. In this case, the strongest peak is observed for X-rays with an energy of 66 keV. This energy corresponds to the K-alpha emission line, which is produced when an electron transitions from the L shell to the K shell, resulting in the release of 66 keV of energy.

The energy of the K-alpha line is related to the atomic number of the element through Moseley's law, which states that the square root of the energy of the K-alpha line is proportional to the atomic number of the element. Using this law, we can calculate the atomic number of the metal as:
Atomic number = (Energy of K-alpha line / Rydberg constant)^2, where the Rydberg constant is 13.6 eV.
Substituting the given energy of 66 keV into the equation, we get:
Atomic number = (66,000 eV / 13.6 eV)^2
Atomic number = 164.7
Therefore, the atomic number of the unknown metal is approximately 165.

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To determine the minimum constant acceleration required for the aircraft to become airborne after a takeoff run of 204 m, we can use the following kinematic equation:
v^2 = u^2 +  as

Where:v is the final velocity (liftoff speed) in m/s.u is the initial velocity (zero in this case) in m/s.a is the acceleration in m/s^2.s is the distance traveled in meters.First, we need to convert the liftoff speed from km/h to m/s:
129 km/h * (1000 m / 1 km) * (1 h / 3600 s) = 35.83 m/s
Now, we can rearrange the kinematic equation to solve for the acceleration:
a = (v^2 - u^2) / (2s)a = (35.83 m/s)^2 / (2 * 204 m)a ≈ 31.51 m/s^2
Therefore, the minimum constant acceleration required for the aircraft to become airborne after a takeoff run of 204 m is approximately 31.51 m/s^2.

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