three resistors, 1-ohm, 2-ohm, and 3- ohm are connected in parallel. if they were connected in series instead their equivalent resistance would be

When the temperature is high, the molecules move around a lot, which indicates that they have a lot of kinetic energy. High velocity causes the molecule to vibrate more quickly, which accelerates the sound wave.

The correct answer is :C.

Temperature is another aspect that impacts sound speed. Like voice, heat is almost like a kinetic energy. Molecules vibrate more quickly at higher temperatures due to having more energy, which speeds up sound wave propagation.

The temperature has an influence on the airspeed as well. Like sound, heat is almost like a kinetic energy. Atoms move more swiftly at higher temperatures because they have more energy. Since molecules vibrate more fast, sound waves may travel more quickly.

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Capacitance is the ability of an electrical conductor and insulator system to store electric charge when there is a potential difference between the conductors.

Capacitance is 3.54×\(10^{-9}\) F,  energy stored is \(2*10^5NC^{-1}\).charge on each plate is 3.54×\(10^{-6\) C.

a parallel - plate capacitor are 5mm apart and 2m² in area.

potential difference = 1k

d=5×\(10 ^ {-3}\)m,

A=2\(m^2\),

V=1000 volt,

Capacitance,  C=∈\(_0\frac{A}{d}\)

=(8.85×\(10^{-12}\)×2)/5×\(10^{-3}\)

=3.54×\(10^{-9}\) F

charge on each plate , q=CV=3.54×\(10^{-9}\)×1000

=3.54×\(10^{-6\) C

energy stored ,E=σ/∈0

=Q/(A∈0)

=(CV)/(A∈0)

=\(\frac{3.54*10^{-9}*1000}{2*8.85*10^{-12}}\)

=\(2*10^5NC^{-1}\).

Capacitance is 3.54×\(10^{-9}\) F,  energy stored is \(2*10^5NC^{-1}\).charge on each plate is 3.54×\(10^{-6\) C.

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Physical and chemical qualities are present in all matter.

Physical qualities, such as mass, color, and volume, are characteristics that may be measured by scientists without modifying the makeup of the sample being studied (the amount of space occupied by a sample).

Chemical characteristics, such as flammability and susceptibility to corrosion, define a substance's distinctive capacity to reacted to generate new substances. A pure substance's chemical and physical properties are the same in all samples.

Extensive or intensive physical properties are both possible. The substance's extensive attributes, such as mass, weight, and size, change with the amount present.

Therefore, Physical and chemical qualities are present in all matter.

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Answer:

The formula is W=mg.

1.) W=40×10=400.

2.)W=40×5=200.

3.)W=40×150=6000.

The change in kinetic energy is 1400 J.

To find the change in kinetic energy, we can use the work-energy theorem, which states that the work done on a system is equal to the change in its mechanical energy (kinetic and potential energy).

The formula for the work-energy theorem is:

ΔKE + ΔPE = W

where ΔKE represents the change in kinetic energy, ΔPE represents the change in potential energy, and W represents the work done on the environment.

In this case, the system loses 690 J of potential energy (ΔPE = -690 J), does 870 J of work on the environment (W = 870 J), and the thermal energy increases by 160 J.

We are required to find the change in kinetic energy (ΔKE).

Before proceeding, we should account for the increase in thermal energy.

This increase means that the total work done on the system (W) is actually 870 J - 160 J = 710 J.

Now, plug the values into the work-energy theorem formula:

ΔKE + (-690 J) = 710 J

To solve for the change in kinetic energy (ΔKE), simply add 690 J to both sides of the equation:

ΔKE = 710 J + 690 J

ΔKE = 1400 J

So, the change in kinetic energy is 1400 J.

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The speed of the electron, after it has accelerated for 10^-9 seconds, is 10^5 m/s. The correct option is C.

Acceleration is the rate at which an object changes its velocity with respect to time. It is a vector quantity, which means it has both magnitude and direction. Mathematically, acceleration is defined as the change in velocity divided by the time taken for that change to occur.

Given:

Acceleration of the electron, a = F/m = 10^-14 N / 9.1 x 10^-31 kg = 1.0989 x 10^17 m/s^2

Time for which electron is accelerated, t = 10^-9 s

Using the equation, âv = at, where âv is the change in velocity, we get:

âv = at = 1.0989 x 10^17 m/s^2 x 10^-9 s = 1.0989 x 10^8 m/s

Therefore, the speed of the electron after it has accelerated for the 10^-9 second is approximately 10^8 m/s, which is closest to option (C) 10^5 m/s.

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Answer:

Interference

Explanation:

Interference is the phenomenon in which two waves superimpose to form a wave with smaller, larger or same amplitude.

There are two types of interference namely, constructive interference and destructive interference.

Constructive interference occurs when the waves are in phase and destructive interference occurs when the waves are out of phase.

In a double slit experiment, the two slits acts as sources of light and thus the waves combine to produce interference patterns. When the waves are in phase, that is the angle between them is 0°, they form a constructive interference pattern which gives rise to a light band. When the waves are out of phase, that is the angle between them is 180°, they form a destructive interference pattern which gives rise to a dark band.

Note also that diffraction patterns are also observed for wide slits but can be neglected for smaller slits.

If you tried to smuggle gold bricks by filling your backpack with dimensions 54 cm x 31 cm x 22 cm, the mass of the gold would be approximately 714.67 kg.

To determine the mass of gold bricks you can fit in a backpack with dimensions 54 cm x 31 cm x 22 cm, we'll first need to calculate the volume of the backpack and then convert that to the mass of gold using the density of gold.
1. Calculate the volume of the backpack:
Volume = Length x Width x Height
Volume = 54 cm x 31 cm x 22 cm = 36,972 cubic centimeters (cm³)
2. Find the density of gold:
Gold has a density of approximately 19.32 grams per cubic centimeter (g/cm³).
3. Calculate the mass of gold that can fit in the backpack:
Mass = Volume x Density
Mass = 36,972 cm³ x 19.32 g/cm³ = 714,665.04 grams (g)
4. Convert the mass to kilograms (kg):
1 kilogram = 1,000 grams
Mass = 714,665.04 g / 1,000 = 714.67 kg
So, if you tried to smuggle gold bricks by filling your backpack with dimensions 54 cm x 31 cm x 22 cm, the mass of the gold would be approximately 714.67 kg. Keep in mind that this calculation assumes the gold bricks are perfectly shaped to fill the entire backpack without any gaps or wasted space.

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The magnetic field tilts of Earth and Uranus are considered to be the most unusual when compared to other celestial bodies in our solar system. Earth's magnetic field tilts at an angle of approximately 11 degrees with respect to its rotational axis, which is quite significant. The magnetic field is generated by the motion of molten iron in the Earth's outer core, which creates a magnetic dipole that is tilted with respect to the planet's rotation axis.

Uranus, on the other hand, has an extremely tilted magnetic field that is almost perpendicular to its rotational axis. This is believed to be due to the planet's unique orientation, as Uranus rotates on its side compared to the other planets in our solar system. The magnetic field is thought to be generated by a layer of electrically conductive fluids deep within the planet's interior, which may be influenced by the unusual orientation of Uranus.

Overall, the magnetic field tilts of Earth and Uranus are intriguing and unique in their own ways, providing valuable insights into the magnetic processes that occur within these celestial bodies.

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As per the given scenario, Ram will cross the river first.

Ram chooses the quickest route and crosses the river without turning. Ram and Hari can both swim in still water at the same speed, hence their respective speeds when crossing the river will be equivalent. Ram will be able to get to the opposing bank the fastest as a result.

Hari, on the other hand, is swimming upstream at an angle and is being dragged downstream by the water.

Hari's overall travel distance will increase due to the downstream current, however his effective speed will drop in comparison to the other bank. Hari will therefore take longer than Ram to get to the opposing bank.

Thus, Ram will cross the river first in this scenario.

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Answer:

He should report his findings to a reputable science journal.

The primary effect of increasing the surface tension of the liquid is to increase the capillary force. Capillary forces arise due to the combined effects of adhesion and cohesion

When the surface tension of the liquid increases, the capillary rise will increase. It is because the increase in surface tension leads to an increase in the force that pulls the liquid upwards in a tube. is as follows;If you place a capillary tube in a beaker filled with water, the water surface inside the tube rises slightly higher than the level outside the tube.

This rise in water level is called capillary rise. The capillary rise is caused by the attraction between the molecules of the water and the molecules of the glass tube.This attraction is called capillary force or capillary action. The capillary force is due to the combined effect of adhesive and cohesive forces. The adhesive force is the attraction between the molecules of the liquid and the molecules of the solid surface, while the cohesive force is the attraction between the molecules of the liquid.

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Suppose i have a piece of material that looks yellow under white sunlight due to selective reflection. when it is illuminated by a lamp emitting cyan light, he color will appear is yellow or green under white sunlight

Selective reflection occurs when only certain colors of light are reflected by a surface, while others are absorbed. In this case, the material appears yellow under white sunlight because it reflects yellow light while absorbing other colors.

When illuminated by a cyan lamp, the material will appear green, this is because cyan light is a mixture of blue and green light, and the material will selectively reflect the green light while absorbing the blue light. The result is a perceived color that is a mixture of the colors that are reflected. In this case, the material appears green because it is reflecting the green light from the cyan lamp while still reflecting some yellow light due to its selective reflection properties. Overall, the material's perceived color will depend on the properties of the illuminating light and the selective reflection properties of the material.

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According to the Skygazer's Almanac for 2022 at 40 degrees, Venus and Saturn will be in opposite parts of the sky on December 17, 2022.

The Skygazer's Almanac provides astronomical information for a specific location and year. In this case, at a latitude of 40 degrees, the almanac indicates that Venus and Saturn will be in opposite parts of the sky on December 17, 2022. This means that Venus and Saturn will appear at opposite sides of the celestial sphere as observed from Earth. However, it's important to note that the almanac's predictions are approximate and can be influenced by various factors, including atmospheric conditions and the observer's specific location. To obtain the most accurate and up-to-date information, it is recommended to consult more recent astronomical sources or use specialized software that can provide precise positions and dates for celestial events.

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As the experiment of the motion of the pendulum is performed. The motion of the pendulum is periodic.

This periodic nature can be represented the sinusoidal functions.

In the given graph, the position of the pendulum is repeated after a regular interval of time which can be represented by the sinusoidal function whose value oscillates.

Thus, the sinusoidal function can best fit the data represented in the figure.

Hence, the second option is the correct answer.

Answer:

B

Explanation:

i got it right on the usatestprep

Answer:

The question is not complete, below is the complete question:

On a beautiful day you decide to go fishing with your younger brother Ben. Ben has not been fishing before so he doesn't know how to properly cast out his line. He puts the lure 24.5 cm above the water before letting it drop straight down. The line accelerates until it hits the water then continues to the bottom of the lake at a constant speed. It takes the lure 5.00 s to reach the bottom of the lake from when it was released by Ben. How deep is the lake? (Assume the lure accelerates at the free fall rate of 9.8 m/s² until it hits the water.)

Answer:

depth of lake = 98cm

Explanation:

Total height of free fall = distance above water + depth of lake = h

for an object falling under the influence of gravity

\(h = \frac{1}{2} gt^2\\where:\\h = height\\g = acceleration\ due\ to\ gravity = 9.8\ m/s^2\\t = time = 5 s\\\therefore h = \frac{1}{2} \times 9.8 \times 5^2\\h = 0.5 \times 9.8 \times 25\\h = 122.5cm\)

Total distance travelled = 122.5cm

Total distance travelled = height above water + depth of lake

122.5 = 24.5 + depth of lake

depth of lake = 122.5 - 24.5

depth of lake = 98cm

Answer:

Ans:

Explanation:

MA=L/E=500N/200N=5/2

VR=ED/LD=60cm/20cm=3

Thus, Efficiency=(Ma*100%)/VR=83.34%

Answer:

Explanation:

Let the potential difference between the middle point and one of the plate be ΔV .

electric potential energy will be lost and it will be converted into kinetic energy .

Electrical potential energy lost = Vq , where q is charge on charge particle .

For proton

ΔV× q = 1/2 M V² ( kinetic energy of proton )

where M is mass and V be final velocity of proton .

For electron

ΔV× q = 1/2 m v² ( kinetic energy of electron  )

where m is mass and v be final velocity of electron . Charges on proton and electron are same in magnitude .

As LHS of both the equation are same , RHS will also be same . That means the kinetic energy of both proton and electron will be same

1/2 M V² =  1/2 m v²

(V / v )² = ( m / M )

(V / v ) = √ ( m / M )

In other words , their velocities  are  inversely proportional to square root of their masses .

Answer: 1.232

Explanation:I remember having this as a hw and this was the answer correct me if I was wrong

From Hooke's law, the length of the spring after extension and after the mass is attached is 1.788 meters. Option B is the answer.

Hooke's law state that in an elastic material, the force applied is directly proportional to the extension provided that the elastic limit is not exceeded.

Given that a 12.0 kg mass is attached to 1.2 m long spring with a spring constant of 200.0 N/m.

The given parameters are:

According to Hooke's law

F = Ke

But F = mg

mg = Ke

Substitute all the parameters into the formula to get extension e

12 x 9.8 = 200e

e = 117.6 / 200

e = 0.588 m

The length of the spring after extension and after the mass is attached will be

\(L_{2}\) = \(L_{1}\) + e

\(L_{2}\) = 1.2 + 0.588

\(L_{2}\) = 1.788 m

Therefore, the correct answer is option B because the length of the spring after extension and after the mass is attached is 1.788 meters.

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Answer:

Total contraction = 1.2277 mm

Explanation:

the solution is given in the picture below and it is more explanatory

Here work done by the car against the force of air in each second denotes the power needed to overcome air resistance at that particular speed. The power of engine is 28 kW.

The power of an object denotes the rate of performing the work. It is defined as the work done in unit time. The SI unit of power is Watt (W) which is also called joules per second.

Power = Resistance × Speed of vehicle

Here the air resistance is found to be 700 N. Then,

Power = 700 × 40 = 28000 N m/s = 28 kW

Thus the engine power is 28 kW.

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The correct answer is frame of reference

Motion is a simple idea to grasp, but depending on the degree of detail required, it might turn out to be a fairly difficult item to calculate. Motion may be defined simply as the measurement of movement in a certain direction. Several forces, including mass, friction, velocity, and distance, must be understood in order to determine movement and direction.

An item must move in order to measure motion. Starting from one position in space and terminating at another is what is meant by this definition. Though time is not required to show motion, it is sometimes added to the calculation of speed to account for the time needed to go from one location to another. In theoretical mathematics, movement is typically represented as an x-y cartesian graph.

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Answer:

Boiling Point

Explanation:

When a liquid changes to a gas is called the boiling point.

Answer:

Magnetism is one aspect of the combined electromagnetic force. It refers to physical phenomena arising from the force caused by magnets, objects that produce fields that attract or repel other objects.

Given that,

Mass of a ball = 300 kg

To find,

The gravitational force acting on the ball.

Solution,

The force acting on the ball is force of gravity. It is equal to the weight of the ball.

W = mg

Substitute the value of m and g in the above formula

W = 300 kg × 10 m/s²

= 3000 N

Therefore, the ball attracts with a force of 3000 N.

Answer:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside

The specific heat of Al is greater than that of water. Therefore, adding Al wire will increase the temperature of water in the calorimeter. While adding the Pb pellets will decrease the temperature.

Calorimetry is an analytical technique used to determine the heat energy absorbed or released by a system. The calorimetric equation connecting the heat change q with mass of the substance m, specific heat capacity c and the temperature difference ΔT is:

q = m c ΔT

The specific heat of a substance is the heat energy required to increase the temperature by one degree Celsius per one gram. Higher the specific heat, higher be the rate of cooling or heating.

The heat gained by water from steel will be greater than that of Al because specific heat of steel is greater. Lead has very small specific heat and the temperature change will be smaller.

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Answer:

aluminum wire = 2.6c

steel wire = 1.5c

lead pellets = 0.8c

Explanation:

The graph that corresponds to 0.1 s in one complete cycle is graph D.

option D is the correct answer.

The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years.

Also, the period of a wave is the amount of time it takes for a wave to complete one wave cycle or wavelength.

From the given parameter, the coil rotates 10 times in one second. The period of the coil is calculated as;

Period = 1 s / 10

Period = 0.1 s

From the graphs, the only option that has one complete cycle in one second is option D.

Check option D, half cycle is 0.05 s and one full cycle is 0.1 s.

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