The persistence of sound after the source of the sound has ceased, as a result of repeated reflections is called

When comparing the motions of a baseball thrown from a height of 10 ft and a ball that is simply dropped from the same height, there are distinct differences.

The thrown baseball exhibits a combination of vertical and horizontal motion. It follows a curved path due to the initial throwing velocity and the force of gravity, resulting in a parabolic trajectory. In contrast, the dropped ball experiences only vertical motion, falling straight down toward the ground in a vertical line. While both objects are affected by gravity, the thrown baseball's additional horizontal velocity allows it to cover a longer distance and follow a more complex path compared to the vertically descending dropped the ball.

Therefore, the thrown baseball exhibits both vertical and horizontal motion, following a curved trajectory due to the combination of the initial throwing velocity and the force of gravity. The dropped ball, on the other hand, experiences only vertical motion, falling straight down toward the ground along a vertical line.

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Consider  optical absorption, the correct statement is that a. absorption can only occur if the photon energy is larger than the energy gap of a semiconductor.

This is because when a photon with sufficient energy interacts with a semiconductor material, it can excite an electron from the valence band to the conduction band, creating an electron-hole pair. The photon must have energy equal to or greater than the bandgap energy for this process to occur. If the photon energy is less than the energy gap, it cannot excite the electron, and absorption will not take place.

Additionally, absorption is strongest when the photon energy matches the energy difference between the band edges of the valence and conduction bands, this is due to the density of available states for the electron to occupy, as it is more likely to find an empty state to transition into at the band edges. As the photon energy matches this energy difference, the probability of absorption increases, leading to stronger absorption in the semiconductor material. So therefore in optical absorption, a. absorption can only occur if the photon energy is larger than the energy gap of a semiconductor. is the correct statement.

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Answer:

6.8kg

Explanation:

170/25=6.8

We can presume that an ambulance with its siren activated is rushing to get somewhere and, depending on the driving circumstances, is likely travelling between 30 and 150 km/h. The vehicle's speed can be determined using the Doppler effect equation. Let va represent the ambulance's maximum speed. The frequency, f'=(vvv a)f=560Hz, is audible as it gets closer.

Because the source is travelling in the direction of the observer, a negative sign appears. The ambulance is described as moving away by the opposite sign with source velocity magnitude. The Doppler shifted frequency as it recedes is f')=(vv+v0)f=480Hz.

The speed of the source can be calculated as va=v(f'f')f'+f'=(343ms)(560Hz480Hz)560Hz+480Hz=26.4ms by solving the second of these equations for f and substituting into the other.

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Levi's instantaneous speed at the moment he looked at his speedometer was 80 km/h, which is consistent with his average speed for the entire trip.

If Levi drove south for two hours and covered a distance of 160 kilometers, then his average speed for the entire trip was:

average speed = total distance / total time = 160 km / 2 h = 80 km/h

Let d(t) be the distance that Levi has driven at time t. Then we have:

d(0) = 0 (starting position)

d(2) = 160 km (final position)

d(1) = 80 km (distance traveled halfway through the trip)

The average speed between time t1 and t2 is given by:

average speed = (d(t2) - d(t1)) / (t2 - t1)

At time t=1, we have:

average speed = (d(2) - d(1)) / (2 - 1) = (160 km - 80 km) / 1 h = 80 km/h

This is consistent with the earlier calculation of the average speed for the entire trip.

The instantaneous speed at time t=1 is given by the derivative of the distance function with respect to time:

instantaneous speed = d'(1)

Using calculus, we can find:

d(t) = 40t^2

d'(t) = 80t

Therefore, the instantaneous speed at time t=1 is:

instantaneous speed = d'(1) = 80 km/h

So Levi's instantaneous speed at the moment he looked at his speedometer was 80 km/h, which is consistent with his average speed for the entire trip.

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Explanation:

It is given that there is distance time graph. The slope of any distance time graph will give the speed or velocity of the object.

In the context, it is seen that there is a point in the distance - time graph. And the values of the point in the graph is (4,15).

Now here, the distance is plotted in the  ordinate or the vertical y-axis while time is plotted in the abscissa or the horizontal x-axis.

Thus the point (4,15) tells us that the object has traveled 15 units in time equal to 4 seconds.

The second projectile is 1.4 times faster than first projectile.

Initial velocity of projectile is proportional to the square root of height covered by pendulum.

From the question, we have

U_2/U_1  =√(h_2/h_1 )

U_2 =√(h_2/h_1 )×U_1

U_2 =√(5.2/2.6)×U_1

U_2= 1.41U_1

The second projectile is 1.4 times faster than first projectile.

Projectile:

The object that is propelled by the application of an external force and then moves freely while being affected by gravity and air resistance is referred to as a projectile. Despite the fact that all items traveling through space are projectiles, they are frequently used in sports and warfare.

Complete question:

In a ballistic pendulum experiment, projectile 1 results in a maximum height h of the pendulum equal to 2.6 cm. A second projectile (of the same mass) causes the the pendulum to swing twice as high, h2 = 5.2 cm. The second projectile was how many times faster than the first?

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Answer:

the answer is 4.15 m/s2

Explanation:

4.15 m/s2

Answer:

V = I * R        voltage drop

P = I * V = I^2 * R        power

I = P / V = 327 / 15 = 21.8 amps

b)   I = 21.8 amps

a) R = P / I^2 = 327 / 21.8^2 = .69 ohms

Check:

V = I R = 21.8 * .69 = 15 Volts

The work done by the weightlifter to raise the weight is 500 J. The work is calculated in Joules.

It can be defined as the product of the force applied and the displacement.

\(W = Fx\)

where,

\(F\)- force = 100 N

\(x\)- displacement = 5 m

Put the values in the formula,

W = 100 x 5

W = 500 J

Therefore, the work done by the weightlifter to raise the weight is 500 J.

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A magnetic field, which is a vector field, has an impact on magnetic materials, electric charges, and electric currents in a similar manner. A moving charge in a magnetic field is subject to a force that is perpendicular to the magnetic field and has its own speed.

The current I is flowing through a circular coil A, which has the radius R. If 2I is the current flowing through another circular coil B with radius 2R, then the magnetic field at the center of the coil is in the ratio of (i.e., BA to BB).

An electrical circuit's restriction to current flow is measured in terms of resistance. The Greek letter omega (Ω) represents resistance, which is measured in ohms.

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Answer: You could tell if you made an error in your calculations by repeating the steps.

Speed of light is the fastest/maximum in vacuum which is equal to 3 × 10^8 m/s, therefore speed of light through any material equal to 4 × 10^8 m/s is physically and theoretically impossible and therefore incorrect.

Explanation:

Answer:

background

Explanation:

If both objects have a mass of 12 kg and are separated by 1.5 m, scenario A would have the least gravitational pull on them. (option-a)

The gravitational pull between any two objects is determined by both their masses and their separation from one another. The force of gravity is directly proportional to the product of the masses and inversely proportional to the square of the distance between the objects, according to Newton's law of universal gravitation.

We must choose the scenario with the least gravitational force among the ones provided. Let's examine each instance:

A. The weights of the first and second objects are each 12 kg, and their separation is 1.5 m.

B. Mass of object 1 = 15 kg, Mass of object 2 = 12(option-a)

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If the intensity at the center of a single-slit diffraction pattern is 1.00 w/cm2, the intensity (in mw/cm2) at a point in the pattern where there is a 41.1 rad phase difference between the waves from the top and the bottom of the slit is 0 mw/cm2

To calculate the intensity at a point in a single-slit diffraction pattern, we use the equation for the intensity of a diffraction pattern:

\(I = (I_0)(sin(alpha)/alpha)^2\)

where I_0 is the intensity at the center of the pattern, alpha is the angle between the center of the pattern and the point where we want to calculate the intensity, and the sine function accounts for the interference between the waves from different parts of the slit.

In this problem, we are given the intensity at the center of the pattern, I_0 = 1.00 W/cm^2, and we are asked to find the intensity at a point where the phase difference between the waves from the top and bottom of the slit is 41.1 radians. To use the equation above, we need to find the angle alpha

The phase difference between the waves from the top and bottom of the slit is related to the angle alpha by:

delta_phi = 2pid*sin(alpha)/lambda

where delta_phi is the phase difference, d is the width of the slit, and lambda is the wavelength of the light. Solving for sin(alpha) gives:

sin(alpha) = (lambdadelta_phi)/(2pi*d)

We are not given the value of lambda, but we can assume that it is in the visible range of the spectrum, which is around 400-700 nm. Let's use lambda = 500 nm. The width of the slit is not given, so we'll assume a typical value of d = 0.1 mm = 0.01 cm.

Plugging in these values into the equation for sin(alpha), we get:

sin(alpha) = (500 nm * 41.1 rad) / (2pi0.01 cm) = 3.32

However, this value is greater than 1, which is not possible for a sine function. This means that the point where the phase difference is 41.1 radians is outside the range of the diffraction pattern, and the intensity at this point is effectively zero.

Therefore, the answer is 0 mW/cm^2.

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Answer:

Work is said to be done when there is change in the position of the object due to the force applied on it.

Explanation:

Hope this helped! Nya~ :3

Divide the distance by the speed:

(18 m) / (42 m/s) = 3/7 s ≈ 0.43 s

Answer:

for number 1 i got 100

Explanation:

Answer:

\( \boxed{\sf Distance \ travelled = 62.5 \ m} \)

Given:

Initial velocity (u) = 25 m/s

Final velocity (v) = 0 m/s (Rest)

Time taken (t) = 5 seconds

To Find:

Distance travelled by car (s)

Explanation:

From equation of motion of object moving with uniform acceleration in straight line we have:

\( \boxed{ \bold{s = (\frac{v + u}{2} )t}}\)

By substituting value of v, u & t in the equation we get:

\( \sf \implies s = ( \frac{0 + 25}{2} ) \times 5 \\ \\ \sf \implies s = \frac{25}{2} \times 5 \\ \\ \sf \implies s = 12.5 \times 5 \\ \\ \sf \implies s = 62.5 \: m\)

\( \therefore\)

Distance travelled by car (s) = 62.5 m

The distance  car travel during that time is 62.5 meter.

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

Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

Initial velocity (u) = 25 m/s

As the car becomes rest, final velocity (v) = 0 m/s (Rest)

Time taken (t) = 5 seconds.

The deceleration of the car: a = (initial speed - final speed)/time interval

= ( 25 m/s - 0 m/s)/5 second

= 5 m/s²

The distance  car travel during that time = ut - at²/2

= 25 × 5.0 meter - (5×5²/2) meter

= 62.5 meter.

Hence, the distance  car travel during that time is  62.5 meter.

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The liquid A is present lower in the container as compared to liquid B due to more weight.

If two liquids A and B of relative densities 0.7 and 0.4 respectively then the lower density liquid remain at the top and higher density solution which is liquid A remains lower in the container because higher density solution has more weight.

So we can conclude that the liquid A is present lower in the container as compared to liquid B due to more weight.

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Answer:free coins grinding up get rekts LOl

Explanation:

Explanation:

Velocity = displacement / time

v = √((58 m)² + (135 m)²) / (12 min × 60 s/min)

v = 0.20 m/s

Answer:

The independent variable is the one that is changed by the scientist. To insure a fair test, a good experiment has only ONE independent variable. As the scientist changes the independent variable, he or she records the data that they collect.

The statement 'establishing a high critical value in a statistical test is associated with more confidence' is TRUE.

The statistical significance is a arbitrary value used to indicate that data collected can be used to confirm (or reject) my working hypothesis.

The most widely used value to measure the statistical significance is the p threshold.

In conclusion, the statement 'Establishing a high critical value when calculating the results of a statistical test means that a researcher will have more confidence in finding significance than when a lower critical value is established' is TRUE.

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Answer:

The answer is F or false

Explanation:

correct edge 2023

The maximum value of the magnetic force this charge can experience is 2.42 x 10^-14 N.

To calculate the maximum value of the magnetic force experienced by the electron, we need to use the equation:

F = qvB

where F is the magnetic force, q is the charge of the electron, v is the velocity of the electron, and B is the magnetic field strength.

The charge of an electron is -1.602 x 10^-19 C, the velocity of the electron after acceleration is:

v = sqrt((2qV)/m)

where V is the potential difference, q is the charge of the electron, and m is the mass of the electron.

Plugging in the values, we get:

v = sqrt((2 x (-1.602 x 10^-19 C) x (2600 V)) / (9.109 x 10^-31 kg))

v = 1.51 x 10^7 m/s

Now we can calculate the maximum magnetic force experienced by the electron:

F = (-1.602 x 10^-19 C) x (1.51 x 10^7 m/s) x (1.00 T)

F = -2.42 x 10^-14 N (the negative sign indicates that the force is in the opposite direction to the velocity of the electron)

So the maximum value of the magnetic force this charge can experience is 2.42 x 10^-14 N.

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Answer: True

no matter can be created nor destroyed in any process. if something is burned, made in a compound or anything like that all matter is still the same amount from beginning to end.

Explanation:

Answer:

A common term is "nodes", also minimums.

Answer:

propulsion

Explanation:

Ok so it usually includes the evaluation of symptom and disorder severity, patterns of symptoms over time number, frequency, and duration of episodes, and the patient's strengths and weaknesses.

Given the circuit above, the instant the switch is closed, the voltage across the capacitor is 1.5 volts.

The switch in this circuit is originally open. The capacitor begins to charge when the switch is closed.

When capacitors in a DC circuit achieve their steady-state, they behave like an open circuit and last for a very long time.

Since there is no current flowing through the capacitor, this indicates that the voltage across it is the same as the value across the resistor.

The resistor's voltage in this instance is specified as 1.5V.

As a result, after a long period of time with the switch closed, 1.5V would likewise be present across the capacitor.

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