A wave is produced in a rope. The wave has a speed of 33 m/s and a frequency of 22 Hz. What wavelength is produced? 0. 67 m 0. 75 m 1. 5 m 3. 0 m.

The strength of the magnetic force is inversely proportional to the square of distance between the magnets. Thus, as the distance increases, force between the magnets decreases.

Magnetic force, is the force generated by magnetic flux lines arised from a magnetic field.  A magnet have a south pole and north pole. There will be repulsive force between two like poles and attractive force between two unlike pole.

The force between two objects is always in inverse proportion with the distance and this is well explained by Coulomb's law of forces.

Thus, F ∝ 1/r² where, r is the distance.

Therefore, as the distance between two magnets increases the magnetic force between them decreases.

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Answer:

Procedure - Take 150g of ice in a beaker and suspend a laboratory thermometer so that the bulb is in contact with ice. Start heating and note the temperature when the ice starts melting. Finally, note the temperature when all the ice is completely melted.

Change in heat causes change in temperature because heat is the transfer of energy from a hotter object to a cooler object, leading to a change in the internal energy of the substance, which in turn affects its temperature.

When heat is added to a substance, its internal energy increases, and the particles in the substance gain kinetic energy, leading to an increase in temperature. The kinetic energy of the particles determines their motion, and as they move faster, the temperature of the substance rises.

Conversely, when heat is removed from a substance, its internal energy decreases, and the particles lose kinetic energy, resulting in a decrease in temperature. As the particles slow down, the temperature of the substance decreases.

The relationship between heat and temperature is described by the specific heat capacity of the substance, which quantifies the amount of heat required to raise the temperature of a given mass of the substance by one degree Celsius. In simple terms, heat is the energy transferred during a temperature change, and the two are intrinsically linked.

In summary, change in heat causes change in temperature because heat is the energy transferred that alters the internal energy of a substance, leading to changes in the kinetic energy and motion of its particles, resulting in temperature fluctuations.

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Answer:

D

Explanation:

I’m pretty sure it’s correct but I don’t really know. Just trying to pass science

Answer:

The correct answer is D trust me I did the test

When the concave lens moves in it exit by spreading out like water

Answer:

all of the above

Explanation:

because I know

Answer: all of the above

Explanation:

Each answer - choice has a reasonable relevance when using a website.

The free body diagram of the elevator can be shown as,

According to free body diagram, the net force acting on the elevator is,

According to Newton's law,

Plug in the known expression,

Substitute the known values,

Thus, the maximum force exerted on the cable is 48925 N.

For minimum, tension the net force can be expressed as,

Plug in the known expression,

Substitute the known values,

Thus, the minimum force exerted on the cable is 44175 N.

A 3-phase generator rated at phase voltage Va = 134/30⁰ kV with phase reactance Xa = j10 Ω per phase is connected to a 3-phase supply with Vsupply = 130/0⁰ kV, S = 178.67 ∠60⁰ MVA total for 3 phases.

To determine the apparent power S of the generator, perform the following steps:

Here, it is given that:

Va (phase voltage) = 134/30⁰ kV

Xa (phase reactance) = j10 Ω

Vsupply (supply voltage) = 130/0⁰ kV

Va = 134/30⁰ kV

Vsupply = 130/0⁰ kV

Xa = j10 Ω

Va - Vsupply = IaXa

(134/30⁰ kV) - (130/0⁰ kV) = Ia * j10 Ω

(4/30⁰ kV) = Ia * j10 Ω

(4/30 * 1000 V) = Ia * j10 Ω

(4/30 * 1000 V) = Ia * j10 Ω

(4000/30 V) = Ia * j10 Ω

(400/3 V) = Ia * j10 Ω

The magnitude of the current Ia can be calculated using Ohm's law:

|Ia| = |Va - Vsupply| / |Xa|

|Ia| = (400/3 V) / 10 Ω

|Ia| = 40/3 A

The angle of the current Ia can be determined by the phase difference between Va and Vsupply:

∠Ia = ∠(Va - Vsupply)

∠Ia = ∠(134/30⁰ kV) - ∠(130/0⁰ kV)

∠Ia = 30⁰ - 0⁰

∠Ia = 30⁰

Therefore, Ia = (40/3 ∠30⁰) A.

Now, the S_phase:

S_phase = (134/30⁰ kV) * (40/3 ∠-30⁰) A

S_phase = (134 * 40 / (30 * 3) kVA) ∠(30⁰ - (-30⁰))

S_phase = (5360/90 kVA) ∠60⁰

S_phase = (536/9 kVA) ∠60⁰

Total apparent power is:

S_total = 3 * S_phase

S_total = 3 * (536/9 kVA) ∠60⁰

S_total = (1608/9 kVA) ∠60⁰

S_total ≈ 178.67 ∠60⁰ MVA

Thus, the final answer is S = 178.67 ∠60⁰ MVA total for 3 phases.

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Answer:

R = ρ L / A      where R is resistance of wire

R2 / R1 = L2 A1 / (L1 * A2)

R2 / R1 = (L2 / L1) * (A1 / A2) = 3 * 2 = 6

R2 = 6 * 2 = 12 Ω

Answer:

hhmmmmmhmmmm hmhmmmm hmmm yeah i got nothing

Explanation:

Randall is correct in stating that the force on the string has a magnitude equal to the product of the charges, q, divided by the square of the length of the string, L.

This is described by Coulomb's Law, which relates the force between two charged objects to the product of their charges and the inverse square of the distance between them. On the other hand, Tilden's statement about the tension in the string being equal to the product of the charges is incorrect.

Tension in the string is not directly related to the charges but is instead a result of the forces exerted by the charged spheres on the string itself.

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Answer:

False. Not everything can turn into a black hole. The formation of a black hole requires a massive object, typically a star, to collapse under its own gravity. This collapse causes the object to become so dense that it creates a singularity, a point of infinite density at the center of the black hole, which is surrounded by an event horizon, the point of no return beyond which nothing, not even light, can escape. So, only objects with sufficient mass and gravity can become black holes.

Explanation:

The current produced by the voltage of 240 V is 1200 A.

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

To calculate the current through the resistance, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence the current is 1200 A.

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Heya!!

For calculate aceleration, lets applicate second law of Newton:

                                                    \(\boxed{F=ma}\)

                                                 Δ   Being   Δ

                                                F = Force = 4 N

                                              m = mass = 36 kg

                                             a = Aceleration = ?

⇒ Let's replace according the formula:

\(\boxed{4\ N = 36\ kg * \textbf{a}}\)

⇒ Clear acceleration and resolve it:

\(\boxed{\textbf{a}=0,111\ m/s^{2}}}\)

Result:

The aceleration is of 0,111 meters per second squared (m/s²)

Good Luck!!

The scale will read 147N

The mass of the object, m = 15 kg

Since I am on the earth, the acceleration due to gravity on the earth is:

g = 9.8 m/s²

The scale will read the weight of the object, and is calculated below

The weight, W = mg

W = 15(9.8)

W = 147 N

Therefore, the scale will read 147N

Answer:  When we use an analogy that represents the expanding universe with the surface of an expanding balloon, what does the inside of the balloon represent? The inside of the balloon does not represent any part of our universe.

The star is moving away from Earth at a velocity of 1.8 x 106 m/s.

The Doppler Effect describes the shift in wavelength of a wave when the source is moving in relation to the observer. The shift can be observed in sound waves, light waves, and other waves.

The Doppler Effect can be used to determine the velocity of objects moving away from an observer, as in the case of stars moving away from Earth.

The velocity of a star moving away from Earth can be determined using the equation:

v = Δλ/λ x c, Where v is the velocity of the star, Δλ is the shift in wavelength of the spectral line, λ is the wavelength of the spectral line measured in the lab on Earth, and c is the speed of light (3.00 x 108 m/s).

In this case, the shift in wavelength of the spectral line is Δλ = 500.3 nm - 500 nm = 0.3 nm.

The wavelength of the spectral line measured in the lab on Earth is λ = 500 nm.

Plugging in these values to the equation above: v = Δλ/λ x cv = (0.3 nm / 500 nm) x (3.00 x 108 m/s) = 1.8 x 106 m/s.

Therefore, velocity of star 1.8 x 106 m/s.

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The momentum of block A is calculated by multiplying its mass (2 kg) with its velocity (50 m/s). Therefore, the momentum of block A is 100 kg·m/s.

Momentum is a fundamental concept in physics that quantifies the motion of an object. It is defined as the product of an object's mass and its velocity. In this case, block A has a mass of 2 kg and is moving along the positive x-axis with a speed of 50 m/s. To find the momentum, we multiply the mass and velocity: 2 kg * 50 m/s = 100 kg·m/s.

Momentum represents the quantity of motion possessed by an object and accounts for both its mass and how fast it is moving. The larger the mass or velocity, the greater the momentum. When considering momentum, direction is also crucial, as it is a vector quantity. In this scenario, since the block is moving along the positive x-axis, the momentum is positive.

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The equilibrant force is equal in magnitude and opposite in direction to the resultant force.

Since the resultant force is 10 N in the positive y axis direction (North), the equilibrant force is 10 N in the negative y axis direction (South). An equilibrant force is a force that can balance or counteract the effect of other forces acting on an object.

It has the same magnitude as the resultant force, but it acts in the opposite direction, resulting in a state of equilibrium where the net force acting on the object is zero.

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The goalie slides on the frictionless ice with a velocity of 0.67 m/s after catching the hockey puck.

The conservation of momentum principle states that the total momentum before the collision is equal to the total momentum after the collision. Therefore, we can use this principle to find the velocity of the goalie after catching the puck.

Before the collision, the momentum of the hockey puck can be calculated as:

p1 = m1v1
where m1 is the mass of the hockey puck and v1 is its velocity. Substituting the given values, we get:

p1 = (0.12 kg) × (50 m/s)
p1 = 6 kg m/s

Since the goalie is at rest before the collision, their initial momentum is zero:

p2 = 0

After the collision, the puck and the goalie move together with a common velocity, which we can call v2. The momentum of the combined system after the collision is:

p3 = (m1 + m2)v2
where m2 is the mass of the goalie. Substituting the given values, we get:

p3 = (0.12 kg + 75 kg) × v2
p3 = 9 kg m/s × v2

Using the conservation of momentum principle, we can equate p1 + p2 to p3:

p1 + p2 = p3
6 kg m/s + 0 = 9 kg m/s × v2
v2 = (6 kg m/s) / (9 kg m/s)
v2 = 0.67 m/s

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The answer to the given question is option C: 40.4°F. Let's see the explanation below.How to find the temperature difference across a properly operating electric furnace?

]We know that the temperature difference across a properly operating electric furnace is given by:ΔT = (Q / (1.08 * CFM))where,Q is the rate of heat input in BTU/hr,1.08 is the factor to convert CFM to lb/min,and CFM is the rate of air flow in cubic feet per minute.So, here,ΔT = (Q / (1.08 * CFM))

Given,The rate of heat input = 10 kW = 34,120 BTU/hrThe rate of air flow = 900 CFMPlugging these values in the above equation, we get:ΔT = (34,120 / (1.08 × 900))ΔT = 40.4°FTherefore, the temperature difference across a properly operating electric furnace that is using a 10-kW electric heater and is moving 900 cfm of air is 40.4°F. Hence, the main answer is option C.

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The temperature difference across the electric furnace is approximately 30.2°F (option A).

To calculate the temperature difference across the electric furnace, we can use the formula:

Temperature difference (ΔT) = Heat (Q) / (Airflow rate * Specific heat capacity * Density)

First, let's convert the power of the electric heater from kilowatts (kW) to watts (W):

10 kW = 10,000 W

Next, we need to determine the specific heat capacity of air. Typically, it is around 0.24 BTU/lb°F.

Since the given airflow rate is in cubic feet per minute (cfm), we need to convert it to pounds per minute (lb/min) using the density of air. The density of air at standard conditions is approximately 0.075 lb/ft³.

Converting 900 cfm to lb/min:

900 cfm * 0.075 lb/ft³ = 67.5 lb/min

Now we can substitute the values into the formula:

ΔT = 10,000 W / (67.5 lb/min * 0.24 BTU/lb°F * 0.075 lb/ft³)

Simplifying the equation:

ΔT = 10,000 W / (67.5 * 0.24 * 0.075) (lb/min * BTU/lb°F * lb/ft³)

Calculating the result:

ΔT ≈ 30.2°F

Therefore, the temperature difference across the electric furnace is approximately 30.2°F, which corresponds to option A.

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Answer:

(0.5x Time)²)

Explanation:

jump height = 4.9 x (0.5 x Time)2).

Answer:

you want to know newtons first law here.

Explanation:

An object that is at rest stays at rest or stays in motion.

which class question is this

Answer:

2.00

Explanation:

Move the sinθ to the right.

Answer:The period of a longitudinal wave is the time taken by the wave to move one wavelength. As for transverse waves, the symbol T is used to represent period and period is measured in seconds (s).

Explanation:

The live, neutral and earth wires functions are

It should be noted that the Domestic circuits typically have a red, high-voltage live wire however the black neutral wire has a voltage that is quite similar to that of the ground.

The live wire (brown) as well as the neutral wire (blue) in a plug are the two wires that together make up the entire circuit with a home appliance.  and the earth wire (green and yellow) bring about  safety .

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Answer:

1.8 m/s

Explanation:

All of the Potential energy ( mgh) is converted to Kintetic energy (1/2 m v^2)

mgh = 1/2 mv^2     divide 'm' out

gh = 1/2 v^2

2 gh = v^2

v = sqrt ( 2 gh )    = sqrt ( 2 * 0.81 * 2 ) = 1.8 m/s

( NOTE that mass (.25kg)  is irrelevant in this question !)

The initial angular velocity of the tire  in  counterclockwise direction was  91 radian/second.

The vector representation of rotation rate, or how quickly an item rotates or revolves in relative to another point, is called angular velocity.

Given that angular acceleration of the tire in counterclockwise direction = 16 rad/sec^2.

Final angular velocity in  counterclockwise direction = 95 rad/second.

time taken = 0.25 second.

Hence, initial angular velocity in  counterclockwise direction = final angular velocity - angular acceleration× time

= (95 - 16×0.25) radian/second

= 91 radian/second.

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Answer:

False

Explanation:

This depends on how much air is in the ball, I think

The snake and rat both share the same ancestor population that had a quadrate bone, which was inherited from an ancestor population.

A homo-logous structure is a trait that may or not have the same function but has a common evolutionary origin.

A homo-logous structure can be used to trace the evolutionary relationships between species.

Conversely, an analogous structure has the same function but it does not reflect an evolutionary origin.

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Answer:

22Km/sec

Explanation: