The change in velocity divided by the time over which the change occurs is the

a) speed
b) average acceleration
c) velocity
d) displacement

The specific heat capacity of silver is {c} = 0.24 J/(kg °C).

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases by 1 °C. Its units are J/(kg °C).

Given is that 55g of silver absorbs 197.9 joules of heat and the temperature rises by 15 °C.

Mathematically, we can write the specific heat capacity as -

Q = mcΔT

where -

{Q} → heat energy

{m} → mass

{c} → specific heat capacity

{ΔT} → change in temperature

We can write -

Q = mcΔT

197.9 = 55 x (15 - 0) x c

197.9 = 55 x 15 x c

c = 197.9/825

{c} = 0.24 J/(kg °C)

Therefore, the specific heat capacity of silver is {c} = 0.24 J/(kg °C).

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Answer:

K.E = (p)^2 / 2m

Explanation:

the first method is : K.E = (p)^2 / 2m where p is the momentum of the object. so here u should be given the momentum and the mass of the object.

Observation is an integral part in scientific investigation. In weather forecasts, keen observation is very essential in weather forecast to scientifically report the climate changes.

Weather forecasters provide up to date information regarding the changes in weather in different regions and the factors affecting it. The primary atmospheric measurements that aid weather forecasters in making their predictions are observation on temperature, humidity, precipitation, air pressure, wind speed, and wind direction.

Since the first weather observations were kept on record, these same criteria have been utilized. However, there have been substantial changes in the types and quality of weather devices as well as the approaches to evaluating observations.

Thermometers, rain gauges, barometers, and anemometers are common tools for observing the weather. Wind profilers, weather balloons  Doppler radar, and satellites are a few examples of more advanced equipment.

Human observations continue to give crucial information on sky conditions, clouds, and the kind, size, and amount of precipitation even with the highly sophisticated instruments currently accessible.

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Answer:

F=ma

v-u=at

Explanation:

F=ma

v-u=at

The charge stored in the capacitor is 9.94 x 10^-10 C.

The capacitance C of a parallel plate capacitor is given by the formula:

C = ε₀ε₁A / d

where ε₀ is the permittivity of free space (8.85 x 10^-12 C^2/Nm^2), ε₁ is the permittivity of the dielectric material (Teflon, with a value of 2.1 x 8.85 x 10^-12 C^2/Nm^2), A is the area of the plates (5.00 m^2), and d is the distance between the plates (0.121 mm = 0.121 x 10^-3 m).

Plugging in the values, we get:

[tex]C = ε₀ε₁A / d = (8.85 x 10^-12 C^2/Nm^2) (2.1) (5.00 m^2) / (0.121 x 10^-3 m) = 4.97 x 10^-10 F[/tex]

The charge stored in the capacitor is given by the formula:

Q = CV

where V is the voltage applied across the capacitor (2.00 V). Plugging in the values, we get:

[tex]Q = CV = (4.97 x 10^-10 F) (2.00 V) = 9.94 x 10^-10 C.[/tex]

So the charge stored in the capacitor is 9.94 x 10^-10 C.

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The gravitational field on the surface of the planet is approximately 9.81 m/s^2

Gravitational field can be defined as the force field that exists in the space around every mass or group of masses.

The gravitational field on the surface of a planet can be calculated using Newton's law of gravitation:

G * m_planet / r^2

Where:

G = 6.67 x 10^-11 Nm^2/kg^2 is the gravitational constant

m_planet = 8.5 x 10^26 kg is the mass of the planet

r = 3.5 x 10^4 km is the radius of the planet (converted to meters)

First, let's convert the radius to meters:

3.5 x 10^4 km = 3.5 x 10^4 x 10^3 m = 3.5 x 10^7 m

Next, let's plug in the values and simplify the expression:

g = G * m_planet / r^2

g = (6.67 x 10^-11 Nm^2/kg^2) * (8.5 x 10^26 kg) / (3.5 x 10^7 m)^2

g = (6.67 x 10^-11 Nm^2/kg^2) * (8.5 x 10^26 kg) / (1.225 x 10^15 m^2)

g = 9.81 m/s^2

Therefore, The gravitational field on the surface of the planet is approximately 9.81 m/s^2

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To show an object's direction and location, motion maps are employed. The motion map provides the following information about the object's position and speed: With a high velocity, the object begins to travel away from the origin.

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The current flowing through the speaker  is 0.045 ampere.

The rate of electron passage in a conductor is known as electric current. The ampere is the electric current's SI unit. Electrons are little particles that are part of a substance's molecular structure.

The potential difference of the speaker = 9 V.

The resistance of the speaker = 200 Ω.

According to Ohm's law,

potential difference  = resistance × current flowing

Hence, the current flowing through the speaker =   potential difference ÷ resistance

= 9 V/200 Ω

= 0.045 Ampere.

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Answer:

180

Explanation:

Because both are anti-parallel.

The equivalent resistance of the circuit = 8 Ω. Current = 3 Ampere. Power =  72 watt.

A circuit in electronics is a complete circular channel via which electricity flows. A current source, conductors, and a load make up a straightforward circuit. In a broad sense, the word "circuit" can refer to any permanent path through which electricity, data, or a signal can pass.

The equivalent resistance of the circuit = 2 Ω + 4 Ω + (6 Ω || 3Ω)

= 8 Ω

Current flowing through the circuit = (24 V ÷ 8 Ω) = 3 Ampere.

Power = VI = 24 × 3 watt = 72 watt.

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The statement that best describes the motion of Object A and Object B is that Object A moves with variable speed and Object B moves with constant speed.

The speed of an object is described as the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time. Speed is thus a scalar quantity.

From the graph, we can deduce that Object A moves with variable speed as there is change in its movement towards a specified part and Object B moves with constant speed.

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The current reading on the ammeter A is 0.30 A.

A stream of charged particles, such as electrons or ions, travelling through an electrical conductor or a vacuum is known as an electric current. The net rate of electric charge flowing through a surface or into a control volume is how it is calculated.

Charge carriers, which can be any of a number of particle kinds depending on the conductor, are the moving particles.

Current is scalar quantity and it follows the algebraic summation during addition.

The current reading on the ammeter A is = (0.20 A + 0.10 A) = 0.30 A.

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1 kg of air passing through the turbine produces 1.98 kg m^2/s^2 of energy.

The energy produced by the turbine can be calculated as follows:

Energy = Efficiency x Kinetic Energy of air

Efficiency = 0.44

Kinetic Energy of air = 1/2 * Mass * Velocity^2

Mass = 1 kg

Velocity = 9 m/s

Plugging in the values:

Energy = 0.44 * (1/2 * 1 kg * 9^2 m^2/s^2) = 0.44 * (1/2 * 9 kg m^2/s^2)

= 0.44 * 4.5 kg m^2/s^2

= 1.98 kg m^2/s^2

So 1 kg of air passing through the turbine produces 1.98 kg m^2/s^2 of energy.

(b) The power output of the turbine can be calculated as follows:

Power = Energy / Time

Time = 1 s (time taken by 1 kg of air to pass through the turbine)

Plugging in the values:

Power = 1.98 kg m^2/s^2 / 1 s = 1.98 kg m^2/s^3

= 1.98 J/s

= 1.98 Watts

So the power output of the turbine is 1.98 Watts.

(c) The change in velocity can be calculated using the law of conservation of energy:

Initial Kinetic Energy + Work done on air = Final Kinetic Energy

Work done on air = Efficiency x Initial Kinetic Energy

Plugging in the values:

Initial Kinetic Energy = 1/2 * 1 kg * 9^2 m^2/s^2 = 40.5 kg m^2/s^2

Work done on air = 0.44 * 40.5 kg m^2/s^2 = 17.82 kg m^2/s^2

Final Kinetic Energy = 40.5 kg m^2/s^2 - 17.82 kg m^2/s^2 = 22.68 kg m^2/s^2

Final Velocity = sqrt(2 * Final Kinetic Energy / Mass)

Plugging in the values:

Final Velocity = sqrt(2 * 22.68 kg m^2/s^2 / 1 kg) = sqrt(45.36 kg m^2/s^2)

= 6.72 m/s

So the change in velocity of the air upon passing through the turbine is 9 m/s - 6.72 m/s = 2.28 m/s.

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Answer:

Yes, the object will turn.

Explanation:

The object will turn because there is an net clockwise moment of 5 Nm and an anti-clockwise moment of 10 Nm, resulting in a net clockwise moment of 5 Nm. According to the laws of physics, an object will rotate in the direction of the net torque acting upon it. In this case, the net torque is acting in a clockwise direction, causing the object to rotate in that direction.

Answer:

The speed of the truck in kilometers per hour at the end of the 20.0m distance is approximately 36.4km/h. The time elapsed is approximately 3.03 seconds.

Explanation:

Answer:

The speed of the truck in kilometers per hour at the end of the 20.0m distance is approximately 36.4km/h. The time elapsed is approximately 3.03 seconds.

Explanation:

Subliminal (subconscious) vision is a deliberate process created by communication engineers, whereby you will receive and respond to information and instructions without realizing it. The messages that are in the printed words, pictures or even the sounds that are presented or introduced are either very fast or very subtle passing through your awareness and alertness.

Actually, information, or stimuli that can be consciously felt by humans can be evaluated, criticized, discussed, refuted and possibly rejected by viewers. Something that is subliminally programmed in the subconscious (unconscious) will not encounter such an obstacle. TV viewers may protest, or an image in cyberspace will be rejected. This subliminal information is predictably stored in your brain and is capable of influencing human judgment, and behavior.

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The mass of the cold water is 13 Kg

The law of conservation of mass states that in a closed system, the total mass of substances present in the system remains constant over time, regardless of the processes that take place within the system.

We can see that mass of the hot water = 10 Kg

Mass leaving = 33 Kg

Mass of the cold water = 33 Kg - 10 Kg

= 13 Kg

Since the mass is constant then if we apply the law of the  consideration of mas to the question that we have here we can see that the mass of teh cold water is 13 Kg.

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The best description of why astronauts have to wear gravity boots on the moon but not on Earth The moon's gravity is stronger than Earth's gravity.

The best description of why astronauts have to wear gravity boots on the moon but not on Earth is that the moon's gravity is weaker than Earth's gravity. The force of gravity is the attraction between two objects with mass, and the strength of the force depends on the mass of the objects and the distance between them. The moon has much less mass than the Earth, so its gravitational force is much weaker.

This means that objects on the moon weigh much less than they do on Earth, and astronauts have to wear gravity boots to keep from floating away. On the Earth, the force of gravity is much stronger, so objects are pulled down to the Earth's surface. This is why we don't need gravity boots to walk around on the Earth. The density of the surface or the magnetic properties of the surface do not play a significant role in this context.

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Based on the speed formula and the data provided on displacement and time, the speed of the walking dude is 200 m/s.

The formula for determining the speed of a body is given below:

Speed = x₁ - x₂ / t₁ - t₂

where;

x₂ - x₁ = change in displacement

t₂ - t₁ = change in time

The speed of the walking dude can be determined as follows:

1. Speed at t = 0.02 seconds

speed = 4 / 0.02

speed = 200 m/s

2.  Speed at t = 0.04 seconds

speed = 8 / 0.04

speed = 200 m/s

3.  Speed at t = 0.06 seconds

speed = 12 / 0.02

speed = 200 m/s

4.  Speed at t = 0.08 seconds

speed = 16 / 0.02

speed = 200 m/s

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The height of the cliff, given that the sound of rock dropped from the cliff was heard 3.7 s later is 629 m

We know that echo of sound wave is given by the following formula:

Speed = (2 × distance) / time

Using the above formula, we can determine the height of the cliff. This is illustrated below:

Speed = (2 × height) / time

340 = (2 × height) / 3.7

Cross multiply

2 × height = 340 × 3.7

2 × height = 1258

Divide both sides by 2

Height = 1258 / 2

Height = 629 m

Thus, from the above calculation, we can conclude that the height of the cliff is 629 m

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D. moving the north pole end of a bar magnet toward the "bird side" of the round magnet.

Magnets work due to the movement of electrons, which creates a magnetic field. In a magnet, electrons are lined up in such a way that their magnetic fields are all pointing in the same direction, creating a net magnetic field. When a magnet is near a piece of ferromagnetic material, such as iron, the electrons in the ferromagnetic material start to line up with the electrons in the magnet, resulting in an attractive force. This is how magnets stick to each other and to other ferromagnetic objects.

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The persistence method is the simplest forecasting method. But it has its own limitations.

When weather patterns change slowly and features on weather maps move slowly, the persistence approach works effectively. It also works effectively in regions where the weather varies little from day to day throughout the summer. However, if the weather changes drastically from day to day, the persistence approach frequently fails and is not the ideal forecasting strategy to utilize.

It may appear that the persistence forecast is only useful for shorter-term forecasts like for day or two. However one of the most significant tasks of the persistence forecast is anticipating long-term weather conditions or producing climate forecasts. Making long-term projections for monthly and seasonal weather conditions requires considerable ability. For predictions longer than ten days, certain alternative forecasting approaches, such as numerical weather prediction, lose all of their accuracy. Persistence is therefore a "hard to beat" strategy for forecasting over extended time periods.

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A car has an acceleration of 4m/s squared. If it started with a velocity of 30m/s, 38m/s is its final velocity.

Acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight forward is accelerated when it accelerates or decelerates.

Even though the speed is constant, motion on a circle accelerates so because direction is always shifting. Both tangential to the acceleration for all other motions.

v = u + at

V= final velocity=?

U= initial velocity=  30m/s

a= acceleration = 4m/s²

substituting all the given values in the above equation, we get

v = 30+ 4× 2

V= 38m/s

Therefore,  38m/s  is its final velocity.

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The real expansion of the apparent expansion of 0.00015 x 10⁻³  per Kelvin and the linear expansion of the container 0.00012 x 10⁻³ per kelvin is 1.8 x 10⁻¹³ per Kelvin.

Apparent expansion is the expansion we see when a liquid is heated without a vessel is called true expansion. The expansion of a liquid that is felt without taking into account the expansion of its container is called apparent expansion. The actual expansion of a liquid is always greater than the apparent expansion.

For actual expansion, the following formula is used:

real area = apparent area x linear area

So,

real expansivity = 0.00015 x 10⁻³ x 0.00012 x 10⁻³

real expansivity = 0.000000018 x 10⁻⁶

real expansivity = 1.8 x 10⁻¹³

The answer is 1.8 x 10⁻¹³ per Kelvin.

Your question is incomplete but most probably your full question was:

Given that apparent expansivity of a liquid is 0.00015x10(raised to power -3) per Kelvin and the linear expansivity of the container is 0.00012 x 10(raised to power -3) per Kelvin, calculate the real expansivity.

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The potential energy at that point is  648 J.

We have to note that by the use of the law of the conservation of the mechanical energy that energy can not be created or destroyed but that the energy can be converted from one form to the other.

We now know that the total energy of the system is; 900 J + 300 J = 1200 J

It then follows from the law of the conservation of the mechanical energy that this total energy must be constant.

Potential energy at that point = 1200 J - 552 J

= 648 J

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Answer:c

Explanation:edge 2023

Answer: c is actually true

Explanation:

The height of the balloon is 1.3 miles above the ground.

Height is the measure of vertical distance, either how "tall" something or someone is, or how "high" the point is. For example, a person's height is typically measured using a stadiometer and is recorded in centimeters or feet and inches. The height of a mountain is usually measured in meters or feet. In aviation, height is measured from the surface of the earth, either above ground level (AGL) or above mean sea level (AMSL).

The answer to this question can be found by using the trigonometric formula of Tangent. To calculate the height of the balloon, we must find the length of the hypotenuse in the triangle formed by the two towns and the balloonist.

Using the formula for tangent, we can calculate the length of the hypotenuse. The formula is:

tan (angle) = opposite side/adjacent side

In this case, the opposite sides are the two towns, and the adjacent side is the height of the balloon.

For the first town, the formula is:

tan 36° = 1.6/x

Solving for x, we can calculate the length of the hypotenuse for the first town to be 2.8 miles.

For the second town, the formula is:

tan 32° = 1.6/x

Solving for x, we can calculate the length of the hypotenuse for the second town to be 2.9 miles.

Since the hypotenuse is the total distance between the two towns and the balloonist, the height of the balloon can be calculated by subtracting the total length of the two towns (1.6 miles) from the hypotenuse of the second town (2.9 miles).

The height of the balloon is 1.3 miles above the ground.

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At 900 degrees Celsius, we would expect the uranium to be in a solid state.

The theory used in this question is the phase transition theory.

This theory states that when a substance is heated or cooled, it can change from one state of matter to another, such as from a solid to a liquid or from a liquid to a gas.

It explains the behavior of matter at different temperatures.

Uranium is a metallic element that can exist in a solid, liquid, or gaseous state depending on its temperature.

When the temperature of uranium is above its melting point of 1132°C, it will be in a liquid state.

When the temperature of uranium drops from 1500°C to 900°C, it will pass through the liquid state and become a solid.

At 900°C, the uranium will be in a solid state.

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The labor involved in moving two charges from a distance of 'd 1 '=10 cm to a closer distance of 'd 2 '=4 cm must be determined for two charges q 1 =12 C and q 2 =8 C.

Between capacitor plates, the field is constant, but the potential rises linearly. As long as the geometry of the capacitor doesn't change, the capacitance won't either. The potential difference will therefore rise in a straight line with the charge since C = Q/V.

To do this, we first determine the charge in the system's potential energy and then take the difference.

Now, d 1 =10cm=1010 2 =10 1 m, and d 2 =4cm=410 2 m.

Consequently, potential (V 1) equals 4 0 when q 1 and q 2 are separated by d 1.

Potential (V 2) equals 4 0 when q 1 and q 2 are separated by a distance of d 2.

Work completed =V 2 + V 1 = 0

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Answer:

D

Explanation:

Energy can not be created or destroyed (law of conservation of energy), so that throws out choices A and B.  There are more classifications of energy than are listed in choice C.  D is the only true statement.