Sound waves are longitudinal waves and are also called _____ waves.A.electromagneticB.mechanicalC.transverseD.surface

The final speed of the wreckage after the collision is approximately 17.86 m/s.

In an inelastic collision, the two objects stick together after the collision and move as a single unit. To find the final speed of the wreckage, we can use the principle of conservation of momentum, which states that the total momentum before the collision is equal to the total momentum after the collision.

The momentum of an object is given by the product of its mass and velocity. Car #1 has a mass of 2500 kg and a velocity of 25 m/s, while Car #2 has a mass of 1000 kg and is initially at rest (velocity = 0 m/s).

The initial total momentum before the collision is (2500 kg * 25 m/s) + (1000 kg * 0 m/s) = 62500 kg·m/s.

Since the cars stick together, their masses add up to form the mass of the wreckage: 2500 kg + 1000 kg = 3500 kg.

Using the principle of conservation of momentum, we can now find the final speed of the wreckage. The final momentum is given by the product of the mass of the wreckage and its final velocity, so (3500 kg * v) = 62500 kg·m/s.

Solving for v, we find v = 62500 kg·m/s / 3500 kg = 17.86 m/s.

Therefore, the final speed of the wreckage after the collision is approximately 17.86 m/s.

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Answer:

0.22 km/h

Explanation:

72 hours in 3 days

16/72 = 0.222222222

round to 0.22 km/h

For future reference, Distance/Time= Speed

Answer:

Solar Energy

Explanation:

Solar radiation (a form of an object) heats up our atmosphere, that's why heat is felt on earth.

Answer:

water seeks its own level

Answer:

water

Explanation:

Answer:

   Gravitational potential energy.

   Chemical energy.

   Nuclear energy.

   Elastic potential energy

   Electrical potential energy

    Hope this helps :)

The current through the circuit after 12.5 ms is 2.5864 A.

The characteristic time constant of a 23.2 mh inductor that has a resistance of 4.21 ω is 5.82115 ms.

If it is connected to a 12.0 v battery, the current after 12.5 ms will be 2.5864 A.

Below are the steps to get to the answer:(a) Calculate the characteristic time constant of the circuit using the formula:τ = L/RWhere τ is the time constant, L is the inductance of the inductor, and R is the resistance of the circuit.tau=23.2mH/4.21Ω=5.82115ms

Hence, the characteristic time constant of the circuit is 5.82115 ms.

(b) To calculate the current through the circuit, we need to use the formula:i = (V/R) [1 - e(-t/τ)]Where i is the current, V is the voltage of the battery, R is the resistance of the circuit, t is the time, and τ is the characteristic time constant of the circuit.i = (12/4.21) [1 - e(-12.5/5.82115)]i = 2.5864

Hence, the current through the circuit after 12.5 ms is 2.5864 A.

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The work done by force on a spring hung from the ceiling will be 1.67 J

Any two things with mass are drawn together by the gravitational pull. We refer to the gravitational force as attractive because it consistently seeks to draw masses together rather than pushing them apart.

Given that a spring is hung from the ceiling with a 2.0-kg mass suspended hung from the spring extends it by 6.0 cm and a downward external force applied to the mass extends the spring an additional 10 cm.

We need to find the work done by the force

Given mass is of 2 kg

So let,

F = 2 kg

x = 0.1 m

Stiffness of spring = k = F/x

k = 20/0.006 = 333 n/m

Now the formula to find the work done by force will be as follow:

Workdone = W = 0.5kx²

W = 0.5 x 333 x 0.1²

W = 1.67 J

Hence the work done by force on a spring hung from the ceiling will be 1.67 J

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Answer: direct linear

Explanation:

\(\text{Weight,}~ \\\\W = mg = 45 \times 9.8 = 441~ N\\\\\text{The weight of the object on earth is 441 N}.\)

Clear question is;

An ideal gas is enclosed in a piston-cylinder apparatus with the piston being freely movable. Given that ΔE is positive and ΔH is negative following a process,

pick one

A) the system absorbs heat and expands during the process.

B) the system absorbs heat and contracts during the process.

C) the system loses heat and expands during the process.

D) the system loses heat and contracts during the process.

E) the system loses heat but neither expands nor contracts during the process.

Answer:

Option A is correct.

Explanation:

In thermodynamics, when the change in energy which is ΔE of a system is positive, it means that the system is undergoing an endothermic process. An endothermic process is simply one where heat is absorbed from the surroundings

Now, when change in enthalpy which is ΔH is negative, it means that it's an exothermic reaction. Exothermic means it releases heat to the surroundings. This means work is positive because the system does work on the surroundings. Thus it will expand.

So the correct answer is;

heat is absorbed from the surroundings and will expand during the process.

The brightness of bulb A will not be affected, but the brightness of bulbs B and D will become brighter.

In the given circuit, the bulbs B, C, and D are connected in series, whereas bulb A is connected in parallel.

All parts of a series circuit are wired together end to end to create a single path for current flow.

A series circuit of incandescent bulbs would have reduced brightness and increased life when a bulb is added. When a bulb is removed from the series combination, the brightness of the other bulbs will increase. Each bulb acts as a resistor reducing the current through each bulb. In a series circuit, when one bulb burns out, it acts as an open switch, and all bulbs go out.

The given question is incomplete as there is no given circuit diagram.

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The half-life of 40K is approximately 1.3 billion years. Given a ratio of 40Ar/40K as 3/1 in a granite sample, we can estimate the age of the sample by understanding the decay process.  Based on the given 40Ar/40K ratio, the age of the sample is approximately 650 million years.

Since the half-life of 40K is 1.3 billion years, this means that after each half-life, half of the 40K atoms will have decayed into 40Ar. Therefore, if the ratio of 40Ar/40K is 3/1, it suggests that three-quarters (or 75%) of the original 40K atoms have decayed into 40Ar.

To determine the age, we can calculate the number of half-lives that have occurred based on the remaining 25% of 40K. Since each half-life is 1.3 billion years, dividing the remaining 25% by 50% (half) gives us 0.5. Thus, the sample has undergone 0.5 half-lives.

Multiplying 0.5 by the half-life of 1.3 billion years gives us an estimated age of 0.65 billion years, or 650 million years, for the granite sample.

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The distance which the football which cover before landing back on the ground level will be about 56.4 meters.

The mass of football, m = 0.43 kg, Initial velocity of football (v) = 24 m/s, Angle of inclination(θ) = 53°

From the given data, we know that the vertical component of the initial velocity is given by, vsin(θ) and the horizontal component of initial velocity is given by, vcos(θ). So, the time taken by the football to reach the maximum height is given by,

t = (vsin(θ))/g

Here, g = 9.8 m/s²

Now, the maximum height attained by the football is given by,h = (vsin(θ))²/(2g).

Therefore, the time of flight or the total time which is taken by the football to land on the ground level is given by,

T = 2t

Now, the horizontal distance travelled by the ball is given by, d = (vcos(θ))T

Substituting the given values in the above formulas, we get:

t = (24sin(53°))/9.8 = 1.71 s

h = (24sin(53°))²/(2×9.8) = 23.4m

T = 2×1.71 = 3.42 s

d = (24×cos(53°))×3.42 = 56.4 m

Therefore, the football will go 56.4 m before it is landing back on the level ground.

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Answer:

Wavelength = 1074 nm

Explanation:

Given:

T = 2700 K

b = 2.9·10⁻³ m·K - Wine's constant

___________

λm - ?

Wine Law:

λm =  b / T

λm =  2.9·10⁻³ / 2700 ≈ 1074·10⁻⁹ m     or  λm = 1074 nm

A. The momentum of an object is the same before and after a collision.

The word Momentum is defined as the product of the mass of a object and its velocity. Momentum is a vector quantity that is it has both magnitude and direction. Newton's second law of motion says that the time rate of change of momentum is equal to the force acting on the an object.

The conservation of momentum is defined as  within some problem area , the quantity of momentum stays constant; momentum is neither created nor destroyed, but just changes through the action of forces as mentioned by Newton's laws of motion.

So we can conclude that option A is the correct answer.

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The tension in the bicep for the given weight of barbell been supported by the hand is 450 N.

According to Newton's third law of motion, action and reaction are equal and opposite.

When the barbell is held, its weight acts downwards while the force exerted by the bicep pulls the barbell upwards.

A sketch of the force diagram is presented below;

                                                 ↑ Tension in the bicep

                                                 ↑

                                                ⊕

                                                 ↓

                                                 ↓ force of the barbell

Tension in the bicep = force of the barbell

Tension in the bicep = 450 N

Thus, the tension in the bicep for the given weight of barbell been supported by the hand is 450 N.

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Answer:

A

Explanation:

Amplitude = height of the wave = 1

Wavelength = 3

They are slightly shifted.

The first statement is the correct one.  Don't make me type the whole thing out.

Answer:

A

Explanation:

It is deemed to be incorrect because velocity deals with displacement. Or in more simple terms, distance in a specified direction.

While moving round the track, the direction keeps changing, so to say and the velocity vector changes constantly.

Speed on the other hand, is a scalar quantity that doesn't bother about nor depends on the direction being taken by the car.

that's all, I hope you understand it all

When the object is placed between the focal point and a convex lens, the image it produces contains these characteristics:

A convex lens (converging lens) is a type of lens that is thicker at the center and thinner at the edges. It bends light from distant objects inward toward a point (focal point). A convex lens is generally used to correct farsightedness.

There's three rules for the ray path passing through convex lens

When those rules is applied to know how the image is produced when an object is placed between the focal point and the lens, you'd find out that the image produced is virtual (located on the same side as the object), upright, and magnified.

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Answer:

A carpet transfers more energy to heat than the floor, I believe.

Explanation:

There is more friction on the carpet creating more heat and energy loss. Potential energy is gained from being at a higher elevation.

Answer:

The centripetal acceleration of car is 8 m/s².

Explanation:

Answer:

b is your answer

Explanation:

Answer:

C

Explanation:

Group one elements share common characteristics. They are all soft, silver metals. Due to their low ionization energy, these metals have low melting points and are highly reactive. The reactivity of this family increases as you move down the table.

The velocity of har C. 1.5 m/s south. Option C is correct answer.

To find the velocity, we need to divide the total displacement by the total time taken. In this case, Mai jogs 800 m north and then turns and jogs 200 m back to the south. The total displacement is the difference between these two distances, which is 800 m - 200 m = 600 m south.

Given that it takes her 400 seconds, we can calculate her velocity by dividing the displacement by the time: 600 m / 400 s = 1.5 m/s south.

The correct answer is C. 1.5 m/s south.

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The linear coefficient of thermal expansion for steel is 11 ×10⁻⁶ /°C. Then the temperature change between the days if the railroad tracks are 3 m long is 30.3 °C.

Thermal expansion is the change in length of a material with respect to change in temperature. The measure of expansion by an increase of 1°C is called its linear coefficient of thermal expansion.

We have the relation between change in length ΔL and change in temperature ΔT with linear coefficient α as follows:

ΔL = α L ΔT

Given ΔL1 = 3 - 0.0012 m = 2.998

ΔL2 = 3 - 0.0027m = 2.997

then ΔL1 - ΔL2 = α L ΔT = 0.001

α for steel = 11 ×10⁻⁶ /°C

ΔT  = 0.001/ (11 ×10⁻⁶ /°C × 3)

      = 30.3 °C

Therefore, the temperature change is 30.31 °C.

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The electric potential at point b experienced by the charge cab be determined using the formulas given.

The electric potential of a point charge is the work done in moving the charge from infinity to certain point against the electric field.

V = Ed

V = (F/q)d

V = (Fd)/q

where;

Thus, the electric potential at point b experienced by the charge cab be determined using the formulas given.

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Combination unit is an air conditioner that contains components for cooling and heating in one sheet metal cabinet. this is true statement.

Heating and cooling are often taken for granted by most people. In the winter and summer, we'll count on the heating and air conditioning to keep us comfortable. You may be able to save money and have a more comfortable environment with a single system that controls both. We may offer combination heating and air conditioning units at Climate Environmental, which will comprise air conditioning systems and heating units that will supply both warm air and cold air with the touch of a remote control.

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