what is the number of waves here?​

Answer:

A hypothesis is a possible explanation for a set of observations or an answer to a scientific question. A hypothesis must be testable and measurable.

Explanation:

Answer:

hypothesis is likely tobe the answer, im indian

Transformer-Rectifier units for CAC-A (Constant Current Arc Welding) should have a minimum of 60% duty cycle, with at least three-phase units.

Constant Current Arc Welding is also known as "stick welding." The acronym CAC stands for "constant current," which means the power source must be able to produce a constant output current, regardless of the resistance of the welding arc.

To create the appropriate current for the welding, a transformer-rectifier is used. A transformer-rectifier unit comprises of a transformer and a rectifier. The transformer converts high voltage, low current AC electricity from the power source to low voltage, high current AC electricity, which is then supplied to the rectifier. The rectifier transforms the AC input into a direct current (DC) output that the welding equipment requires.

The duty cycle is defined as the amount of time during which the machine can operate without overheating. The transformer-rectifier should have a 60% duty cycle or higher because welding generates a lot of heat and needs a lot of power. If the duty cycle is too low, the unit will shut down too often and be unable to perform effectively.

A 60% duty cycle ensures that the welding machine can run continuously for six minutes out of every ten minutes. It is recommended that you choose a transformer-rectifier with a duty cycle that meets your requirements, as a higher duty cycle would allow you to weld for longer periods of time before requiring a cool down period.

Learn more about Current at: https://brainly.com/question/1100341

#SPJ11

Red has a longer wavelength than yellow. The wavelength of light determines its color, with longer wavelengths corresponding to colors on the red end of the visible spectrum.

Red light has a longer wavelength than yellow light, meaning that the distance between successive peaks or troughs of the red light wave is greater than that of the yellow light wave.

Similarly, blue has a longer wavelength than green, green has a longer wavelength than yellow, and violet has a longer wavelength than blue.

This is because the colors in the visible spectrum are arranged in increasing order of their respective wavelengths, with red having the longest wavelength and violet having the shortest.

The relationship between wavelength and color helps us perceive and differentiate between various colors in the visible light spectrum.

To know more about spectrum, refer here:

https://brainly.com/question/13435566#

#SPJ11

The theoretical density of BCC chromium is , 2.48g/cm³

ρ = \(\frac{N * M }{N_{A} * a^{3} }\)

where

ρ  = density of unit cell

a = edge length of unit cell

M = Atomic mass

Z = no. of atoms in unit cell

\(N_{A}\) = Avogadro's number

(given)

Z = 2 (BCC)

M = 52.0 g/mol

atomic radius = 0.125 nm

edge length of unit cell is a

r = 0.866a (BCC unit cell)

a = 0.125nm/0.866 = 0.144×10⁻⁷cm

1nm = 10⁻⁷cm

using above values

ρ = 2× 52.0 / (6.022×10²³mol⁻¹ )×(0.144×10⁻⁷cm)³

ρ =   2.48g/cm³

The theoretical density of BCC chromium is , 2.48g/cm³

to know more about theoretical density

https://brainly.com/question/14526953

#SPJ4

Answer:

0.02 m/s^2

Explanation:

acceleration= change in velocity/change in time

change in velocity= 4.5m/s - 2.3m/s = 2.2 m/s

acceleration= 2.2/120= 0.0183

= 0.02 (to 2 significant figures)

The Saturn V rocket with the Apollo spacecraft, when moving at a speed of 11.2 km/s, would have a kinetic energy of approximately 150,528,000,000 Joules.

To calculate the kinetic energy of the Saturn V rocket with the Apollo spacecraft, we can use the formula:

Kinetic energy (KE) = (1/2) * mass * velocity^2

Given:

Mass (m) = 2.4 * 10^5 kg

Velocity (v) = 11.2 km/s

First, we need to convert the velocity from km/s to m/s:

11.2 km/s * 1000 m/km = 11,200 m/s

Now we can calculate the kinetic energy:

KE = (1/2) * 2.4 * 10^5 kg * (11,200 m/s)^2

Simplifying the equation:

KE = 0.5 * 2.4 * 10^5 kg * 125,440,000 m^2/s^2

Multiplying the numbers:

KE = 150,528,000,000 J

Therefore, the Saturn V rocket with the Apollo spacecraft, when moving at a speed of 11.2 km/s, would have a kinetic energy of approximately 150,528,000,000 Joules.

Learn more about kinetic energy here:

brainly.com/question/999862

#SPJ11

Answer:

None of the choices you provided are correct. When a gas burns, it releases energy in the form of heat and light. Some of this energy is transferred to the pot of water, increasing its temperature, but some of the energy is also released as light. However, the rest of the energy is not transformed into chemical, electrical, or nuclear energy. Instead, it is lost to the environment in the form of waste heat. This is why gas stoves can become hot to the touch - they are releasing excess energy in the form of heat that is not being used to heat the pot of water.

Explanation:

(i) The current caused by the beam and (ii) The energy transfered by the beam is 0.0017 A and 306 J respectively.

Current is the rate of flow of charge in a circuit.

(i) To calculate the current  caused by the beam, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

(ii) To calculate the energy transferred by the beam in 30 seconds we use the formula below

Where:

Given:

Substitute into equation 2

Hence, the current  and the energy of the beam is 0.0017 A and 306 J respectively.

Learn more about current here: https://brainly.com/question/25922783

#SPJ1

I. The current caused by the beam is 0.0017 A

II. The energy transferred by the beam in 30 s is 306 J

The charge flowing through a conductor is related to current and time by the following formula:

Charge (Q) = Electric current (I) × time (t)

Q = It

Divide by t

I = Q / t

Using the above formula, we can obtain the current as shown below:

I = Q / t

I = 0.0102 / 6

I = 0.0017 A

Electrical energy is given by the following formula:

Energy (E) = Current (I) × Voltage (V) × time (t)

E = IVt

With the above formula, we can obtain the energy as follow:

E = IVt

E = 0.0017 × 6000 × 30

E = 306 J

Learn more about current:

https://brainly.com/question/23754329

#SPJ1

Speed = (rate of acceleration) x (time)

Accelerating at 5.5 m/s² for 4 seconds, the car gains (5.5 x 4) = 22 m/s of speed.

If it's actually traveling at 25 m/s at the end of that time, then it must have already been moving at (25 - 22) = 3 m/s when the 4 seconds started.

To determine the range of frequencies of which the continuous time signal is not equal to zero, you need to provide the actual signal.

Without the signal, it is not possible to determine the range of frequencies of the signal that is not equal to zero. However, in general, if the signal is periodic, then it can be expressed as a sum of sinusoids using Fourier series.

The range of frequencies of the signal that are not equal to zero can be determined from the Fourier series coefficients of the signal. The Fourier series coefficients give information about the amplitude and phase of each sinusoidal component in the signal.

For a non-periodic signal, the Fourier transform can be used to analyze the frequency content of the signal.

The Fourier transform gives a continuous spectrum of frequencies that make up the signal. The range of frequencies of the signal that are not equal to zero can be determined from the Fourier transform of the signal.

In summary, the specific signal is required to determine the range of frequencies at which it is not equal to zero. If it's a periodic signal, the range of frequencies of the signal can be obtained from the Fourier series coefficients while for a non-periodic signal, the Fourier transform can be used to determine the frequency content of the signal.

To know more about frequency, visit

https://brainly.com/question/254161

#SPJ11

Answer:

An interaction between electricity and magnetism produces an electromagnet, while a permanent magnet induces the paper clip's magnetic field.

Explanation:

A p e x :)

Answer:

2. 8.62×10² Nm

3. 2.30×10² Nm

4. 6.32×10² Nm

Explanation:

2. Determination of the work done by the applied force.

Force (F) = 225 N

Distance (d) = 5 m

Angle (θ) = 40°

Workdone (Wd) =?

Wd = Fd × Cos θ

Wd = 225 × 5 × Cos 40

Wd = 8.62×10² Nm

3. Determination of the work done by the frictional force.

Frictional Force (Fբ) = 60 N

Distance (d) = 5 m

Angle (θ) = 40°

Workdone (Wd) =?

Wd = Fբd × Cos θ

Wd = 60 × 5 × Cos 40

Wd = 2.30×10² Nm

4. Determination of the net work done.

We'll begin by calculating the net force acting on the crate

Force applied (F) = 225 N

Frictional Force (Fբ) = 60 N

Net force (Fₙ) =?

Fₙ = F – Fբ

Fₙ = 225 – 60

Fₙ = 165 N

Finally, we shall determine the net Workdone. This can be obtained as follow:

Net force (Fₙ) = 165 N

Distance (d) = 5 m

Angle (θ) = 40°

Workdone (Wd) =?

Wd = Fₙd × Cos θ

Wd = 165 × 5 × Cos 40

Wd = 6.32×10² Nm

When a body jumps into the air, in addition to the effects of gravity and air resistance, several other factors influence its trajectory. Three of the most important factors are Initial velocity, angle of projection, and Spin or angular momentum.

Initial velocity: The velocity at which the body jumps into the air has a significant effect on its trajectory. A body that jumps with a higher initial velocity will travel farther and higher than one that jumps with a lower velocity.

The angle of projection: The angle at which the body is projected into the air can greatly affect its trajectory. If the body is projected at a low angle, it will travel farther along the ground, while a higher angle of projection will result in a shorter distance but greater height.

Spin or angular momentum: The spin or angular momentum of the body can affect its trajectory by causing it to deviate from a straight line. A body with no spin will typically follow a straight trajectory, while one with spin will experience a curved or twisting motion in the air. This effect is particularly important in sports such as baseball, tennis, and gymnastics, where the spin of the ball or body can greatly influence its trajectory.

Learn more about projectile motion here:
https://brainly.com/question/29545516
#SPJ1

The different types of faults include normal faults, reverse faults, and strike-slip faults. Normal faults occur when the hanging wall moves down relative to the footwall due to tensional forces.

1.Normal faults occur in areas experiencing tensional forces, where the hanging wall moves down relative to the footwall. Reverse faults occur in areas experiencing compressional forces, where the hanging wall moves up relative to the footwall. Strike-slip faults occur in areas with shear forces, where blocks move horizontally past each other.

2.Normal faults are caused by the stretching and thinning of the Earth's crust, usually associated with divergent plate boundaries. Reverse faults are caused by the compression and shortening of the crust, typically occurring at convergent plate boundaries. Strike-slip faults result from shear stress and the lateral movement of adjacent crustal blocks along a fault plane.

3.Synclines and anticlines are both types of folds in rock layers. A syncline is a downward-folded or trough-like structure, where the youngest rock layers are in the center. An anticline is an upward-folded or arch-like structure, with the oldest rock layers in the center. These folds can form through tectonic forces, such as compression or lateral movement of the Earth's crust.

4.Scientists use various techniques to piece together a 3D image of Earth's crust, including seismic imaging, geological mapping, and geophysical surveys. Seismic data from earthquakes and controlled sources help determine the subsurface structures. Geological mapping involves studying rock outcrops and surface features. Geophysical techniques, like gravity and magnetic surveys, measure variations in the Earth's physical properties. This information allows scientists to understand the subsurface architecture, tectonic processes, and geological history. It can be used for assessing earthquake hazards, locating mineral and energy resources, and developing geological models for resource exploration and land-use planning.

Learn more about tensional forces here:

https://brainly.com/question/29124835

#SPJ11

Given:

The upward acceleration of the elevator, a=1.24 m/s²

The mass of the person, m=91.3 kg

To find:

The reading of the scale.

Explanation:

When the elevator is accelerating upwards, the force applied on the scale is given by,

On substituting the known values,

Final answer:

The reading of the scale is 1007.95 N

Answer:

I'm pretty sure its 3m/s^2 for the acceleration but I don't know the force part sorry .

Explanation:

15m/s - 0m/s divided by 5 s = 3m/s

I'm no expert or anything so I could be wrong but this is the best I can give you. Sorry

The formula to calculate the utilization of the second activity in a push system can be determined by dividing the total time spent on the second activity by the total time available.

In a push system, activities or tasks are performed sequentially, and the completion of one activity triggers the start of the next activity. The utilization of activity refers to the proportion of time that the activity is being used or occupied.

To calculate the utilization of the second activity in a push system, we need to determine the total time spent on the second activity and divide it by the total time available. The formula can be expressed as:

Utilization of Second Activity = (Time spent on Second Activity / Total Time Available) * 100

The time spent on the second activity refers to the duration or amount of time required to complete that specific activity. The total time available represents the total duration or available time for the entire process or system.

By using this formula, we can determine the utilization of the second activity, which provides insight into how efficiently the activity is being utilized within the overall system.

Learn more about the push system here: https://brainly.com/question/15706290

#SPJ11

The Initial Temperature of the Iron sphere is 253.40 C.

When two items are connected by a permeable barrier and there is no net energy flow between them, they are said to be in thermal equilibrium. This does not imply that no energy passes between the objects in thermal equilibrium; rather, an equal amount of energy flows back.

Thermal equilibrium can also relate to how heat is distributed within a single, isolated body.

Given,

Specific heat of iron = 470 J/KgC

Specific heat of water = 4200 J/KgC

Temperature of Water = 10 C

Final Temperature of Iron = 30 C

Initial Temperature of Iron = T

Heat lost by Iron = Qlost

                             = Miron SΔT

                             = (200/1000) * 470 * (T-30)

Heat gain by water = Qgain

                                 = Mwater SΔT

                                 = (500/1000) * 4200 * 10

According to the thermal equilibrium,

Qlost = Qgain

=> (200/1000) * 470 * (T-30) =  (500/1000) * 4200 * 10

=> T- 30 = 223.40

=> T = 253.40 C

Thus, the Initial Temperature of the Iron sphere is 253.40 C.

Learn more about  the thermal equilibrium here:

https://brainly.com/question/14556352

#SPJ9

Answer: 180 m south

Explanation:

The displacement of the horse in this time is 180 m south. The correct option is A.

The displacement is the shortest distance travelled by the particle. It is the vector quantity which re[presents both the magnitude and direction.

Velocity is the time rate of change of displacement with time.

Given is a horse runs for 15 seconds to the south at a speed of 12 m/s. So, the displacement is

Displacement = Speed x Time

Put the values, we get

Displacement = 12 m/s x 15s

                      = 180 m

Thus, the displacement of the horse in this time is 180 m south.

Learn more about displacement.

https://brainly.com/question/11934397

#SPJ2

Initial velocity,u = 0 m/s

Final velocity,v = 24 m/s

Distance covered,s = 56 m

Calculate the acceleration ( a ) .

According to the third equation of motion,

\( \bf \: {v}^{2} = {u}^{2} + 2as\)

★ Substituting the values in the third equation of motion:

\( \sf \implies \: {(24)}^{2} = {(0)}^{2} + 2 \times a \times 56\)

\( \sf \implies \: 576 = 112a\)

\( \sf \implies \: a = \dfrac{576}{112} \)

\( \sf\implies \: a = 5.14 \: m {s}^{ - 2} \)

Answer: In that case, Put something like "My hypothesis is that the car will take (x) seconds to get to checkpoint 1, (x) seconds to get to checkpoint 2, (x) seconds to get to checkpoint 3, and (x) seconds to get to checkpoint 4" Replacing x with random numbers, or number close to the actual found numbers, but honestly as long as the guesses arent outrageous you should get the question right

Explanation:

I formulate a hypothesis which is based on his observations as to what happens when both the rock and the wood are immersed in water.

Density is described as mass per unit volume which is an important parameter for understanding fluid and its properties. Its unit is kilogram per cubic meter.

The mass and density relation is given as:

mass = density × volume

In this scientific investigation if the volume or density of objects determines whether solid objects float or sink in water, I performed a density, mass, and volume experiment using a rock and a standard-sized piece of wood. It is important that the chosen piece of wood is larger than the rock where the rock is small enough to fit inside the measuring cylinder.

Thus, I formulate a hypothesis which is based on his observations as to what happens when both the rock and the wood are immersed in water.

Learn more about the Density, here:

brainly.com/question/952755

#SPJ2

Your question is incomplete, most probably the complete question is:

Density of solids What is your hypothesis (or hypotheses) for this experiment?.

Answer:

\(45 J\)

Explanation:

The equation for work is:

\(Work=Force*Distance\)

We can substitute the given values into the equation:

\(Work=15N*3m\\Work=45Nm\\Work=45J\)

Answer:

45 J

Explanation:

w =fd

w = 15(3)

Answer:

The doctors could see if her cells are getting the molecules they need from food and air

Explanation:

The doctors could see if her cells are getting the molecules they need from food and air. Doing so allows the doctors a general overview of how well her body's biological systems are performing since the basic necessities of the human system are food and oxygen. Therefore if the body is receiving both food and oxygen properly and distributing it properly and efficiently as well without any problems then the most likely outcome is that she is healthy enough to perform her tasks in the submarine under more pressure.

Answer:

The doctors could see if her cells are getting the molecules they need from food and air

Explanation:

Answer: Therefore, the mass of the object is 2.222 kg on the Earth, Moon, Saturn, Mercury and everywhere else it goes.

Explanation:

Answer:

the mass is 2.04

Explanation:

The weight of an object is calculated by: W=Mg

Solving for M:  M=W/9

M=20/9.8 = 2.04

The momentum of the probe after the retrorocket ceases to fire is 9.9 * 10^7 Kg m/s

We know that the momentum of an object has to do with the product of the mass and the velocity of an object. The momentum of an object is a vector quantity and the direction of the momentum is the direction of the velocity of the object that is in motion.

According to the Newton second law of motion, we know that the rate of change of the momentum is equal to the impressed force that is acting on the body.

We know that;

\(F_{t}\) = \(p_{f}\) -\(p_{i}\)

F = force

t = time taken

\(p_{f}\)= final velocity

\(p_{i}\) = initial velocity

\(p_{f}\) = \(F_{t}\)  + -\(p_{i}\)

\(p_{f}\) = (2.0 * 10^6 * 12 s) + 7.5 * 10^7

\(p_{f}\)  = 2.4 * 10^7 + 7.5 * 10^7

\(p_{f}\)  = 9.9 * 10^7 Kg m/s

Hence, the momentum of the retrorocket is 9.9 * 10^7 Kg m/s.

Learn more about momentum:https://brainly.com/question/24030570

#SPJ1

Missing parts;

A  space probe is traveling in outer space with a momentum that has a magnitude of  7.5 * 10^7 kgm/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 2.0  * 10^6 N and a direction opposite to the probe's motion. It fires for a period of 12 s. Determine the momentum of the probe after the retrorocket ceases fire.

The lowest frequency at which the circuit can operate can be determined using the formula:
f = (1 / (2π√(L3 * C)))
The lowest frequency at which the circuit can operate is not limited by the given parameters.

Given that L3 is 24 mH (millihenries), we can convert it to henries by dividing it by 1000:
L3 = 24 mH = 0.024 H
Assuming the circuit operates at the resonant frequency, the inductive reactance (XL) and capacitive reactance (XC) cancel each other out, resulting in a purely resistive circuit. This means that the impedance (Z) of the circuit is equal to the resistance (R). In this case, the impedance is given by:
Z = Vrms / Irms = 7.0 V / 1.0 A = 7.0 Ω
Since Z = R, we can consider R as the effective resistance of the circuit.
Using the impedance and inductance values, we can calculate the capacitance (C) required for the circuit:
Z = √(R² + (XL - XC)²)
7.0 Ω = √(R² + (2πfL3 - 1 / (2πfC))²)
Since we want to find the lowest frequency, we can assume that the capacitive reactance is at its maximum value, which occurs when XC = 1 / (2πfC) is at its minimum. This happens when the denominator is at its maximum value, which occurs when fC is at its minimum.
Therefore, the lowest frequency (f) occurs when fC = 1 / (2πfC) is at its minimum.
Simplifying the equation, we have:
1 / (2πfC) = 2πfC
1 = (2πfC)²
1 = 4π²f²C²
f²C² = 1 / (4π²)
Now we can substitute the given values and solve for the lowest frequency (f):
(1 / (4π²)) * C² = 1 / (4π²)
C² = 1
Since C is the capacitance, its value cannot be negative. Therefore, the equation C² = 1 has a valid solution, which means that the lowest frequency (f) is not restricted by the given constraints.
In conclusion, the lowest frequency at which the circuit can operate is not limited by the given parameters.

To learn more about, Frequency, click here, https://brainly.com/question/30783512

#SPJ11

Answer:

The pressure of the air molecules inside the pen cap increases and the volume occupied by the air decreases such that the combined volume occupied by the pen cap and the air volume reduces while the combined mass of the pen cap and the air molecules remain the same

Given that density = The mass/Volume, we have that the density varies inversely as the volume, and as the volume reduces, the density increases

Upon squeezing, therefore, as the new combined density of the pen cap and the air molecules rises to more than the density of the water in the bottle, then, the pen cap air molecule is relatively more denser than the water, which will result in the pen cap sinking to the bottom of the bottle

Explanation:

Answer: 76.5

Divide the mass of Sample X by the mass of Sample Y.

13.005 ÷ 0.17

Rewrite this as 1300.5 divided by 17.

Taka is figuring out the mass of some materials in his science lab. Sample X has a mass of 13.005 g, and Sample Y has a mass of 0.17 g. The mass of Sample X is 76.5 times the mass of Sample Y.

Finding the product of two or more numbers in mathematics is done by multiplying the numbers. It is one of the fundamental operations in mathematics that we perform on a daily basis.

As given in the problem Taka is figuring out the mass of some materials in his science lab. Sample X has a mass of 13.005 g, and Sample Y has a mass of 0.17 g.

Thus, if Sample X has a mass of 13.005 g, and Sample Y has a mass of 0.17 g. The mass of Sample X is 76.5 times the mass of Sample Y.

To learn more about multiplication here, refer to the link given below ;

https://brainly.com/question/10520264

#SPJ5

Answer:

The building are not getting farther and farther away, road signs, exits, other cars

Explanation: