Collection of sounds deliberately used in a regular pattern

Answer:

In a closed system, the total energy is conserved or remains the same as energy transformations take place.

Explanation:

The law of conservation of energy states that energy cannot be created or destroyed but can be transformed from one form to another.

This law of conservation of energy applies only to a closed system. A closed system is a system which does not exchange energy with its surroundings. All forms of energy conversions occurring within a closed system does not result in an increase or decrease of the total energy of the system, rather, energy remains constant. For example, the universe is a closed system in that all forms of energy conversions occurs within it and energy is not exchanged with an external environment. However, the earth is not a closed system as some of the energy it receives from the sun can be radiated out into space. Since it's an open system, its total energy can change.

The total energy of a closed system as energy conversion takes place

remains constant.

A closed system is the system which doesn't permit any movement of matter

in and out of the system. The closed system doesn't allow the exchange of

energy with its environment.

Since energy exchange isn't permitted in the closed system, the energy

remains constant during energy conversion.

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Answer:

Explanation:

i wanna say its A

Answer:All three states of matter (solid, liquid and gas) expand when heated. ... Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.

Explanation:well I tried lol she just copied and pasted faster than I could

Answer:

As, we know momentum = mass × velocity that is p = mv

we have momentum (p) = 2 kg m/s

and velocity (v) = 8 m/s

so substitute values in p=mv

2 kg m/s = m × 8 m / s

m = 2 / 8 kg = 0.25 kg

Therefore, mass of substance is 0.25 kg.

2/8 in fractional form.....

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Answer:

c.

Explanation:

From the options provided the best description of scissor is that scissors helps to scrap things down. This is the main purpose of scissors, to cut things, and by doing so you are breaking up a larger object into smaller and more manageable scraps. We can get rid of the other options because scissors are made of metal and therefore not soft and are not necessarily dull since they need to be sharp to fulfill their purpose. Although a pair of scissors has two holes it is not necessarily the best description of it.

Liquids have different densities, in this case, it's water so if you weigh kilograms of two liquids with different densities, they will weigh different quantities. Solids here block and rocks have much greater packing variability than liquids, so measuring by volume is not practical in terms of reproducibility.

Therefore, even between identical substances, the mass cannot be uniform from unit volume to unit volume.

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The volume of water fell on the town is 1382 acre foot.

To find the volume of water, the given values are:

Area of the town = 28 km² (square kilometer)

Time = 30 minutes

Height = 2.4 inch

   The volume of water during a severe thunderstorm can be calculated as,

At first inch should be converted to meter,

1m = 39.37 inch

So, 2.4 inch = 2.4 / 39.37

                    = 0.0609 m

Then, we have to calculate the volume,

Formula of volume,

Volume V = Height H × Area A

                = 0.0609 × 28 × 1000²

                = 1705200 m³

Here, the volume should be in acre feet,

The value of, 1 m³ = 0.000810714 acre foot

so, 1705200 m³ = 1382.43 acre foot

Hence, the volume of water during a severe thunderstorm, fell on the town was 1382 acre foot.

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As the box is moving with a constant velocity, the two forces acting on the box are canceling each other.

Then   friction force = 80 Newtons              but in the opposite direction.

Friction force =  Mu  * Normal force exerted by ground  =  Mu * weight of box

So we find Mu.

Mu = coefficient of friction between box and horizontal surface

          = Force of friction / weight  =  80 / 50 * 9.81 = 0.163

When an identical box is placed on top, the force of friction is

      = Mu * total weight = 0.163 * (50+50) * 9.81 = 159.9 Newtons

Answer:

2.05pm.

Explanation:

In the picture.

Answer:

Matter either loses or absorbs energy when it changes from one state to another. For example, when matter changes from a liquid to a solid, it loses energy. The opposite happens when matter changes from a solid to a liquid. ... The amount of energy in matter can be measured with a thermometer.

Explanation:

Answer:

Matter either loses or absorbs energy when it changes state.

After 1 day has passed, approximately 6.25% of Element Z would be remaining.

The half-life of an element is the time it takes for half of the initial amount of the element to decay or transform into another element or isotopes. In this case, Element Z has a half-life of 5 hours.

To determine the percentage of Element Z remaining after 1 day (24 hours), we need to calculate the number of half-lives that have occurred.

Since the half-life of Element Z is 5 hours, there are 24 hours divided by 5 hours, which equals 4.8 half-lives.

Each half-life reduces the amount of Element Z by half. So, after 4.8 half-lives, the remaining amount of Element Z would be (1/2)^(4.8) = approximately 0.0625 or 6.25%.

Therefore, after 1 day has passed, approximately 6.25% of Element Z would be remaining.

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The asteroid's escape velocity is E 890 m/s. The correct option is E) 890 m/s

To calculate the asteroid's escape velocity, we can use the formula:

escape velocity = √(2 * gravitational constant * mass / radius)

However, we don't know the mass of the asteroid. But we can use the fact that the gravitational acceleration at the surface is 2.0 m/s² to calculate the mass using:

gravitational acceleration = gravitational constant * mass / radius²

Rearranging this equation to solve for mass, we get:

mass = gravitational acceleration * radius² / gravitational constant

Plugging in the values given, we get:

mass = 2.0 m/s² * (400 km * 1000 m/km)² / (6.674 × 10⁻¹¹ m³/kg/s²) = 3.81 x 10¹⁵ kg

Now we can use this mass value to calculate the escape velocity:

escape velocity = √(2 * gravitational constant * mass / radius)
escape velocity =√(2 * 6.674 × 10⁻¹¹ m³/kg/s² * 3.81 x 10¹⁵kg / 400 km * 1000 m/km)
escape velocity = 891 m/s

Therefore, the correct option is E) 890 m/s.

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Answer:

\( \huge \boxed{ \boxed{2 + \sqrt{3}}} \)

Explanation:

The higher level that the electron reached from the ground state is n = 8.

The lowest permitted energy level for hydrogen is the ground state, which also has no angular momentum. A single electron was present in the 1s atomic orbital, making it the most stable state.

The ground state of an atom, molecule, or ion is the lowest permitted energy state according to chemistry and physics. In other words, the most stable arrangement is the ground state.

Wavelength of photon absorbed by ground state H atoms;  λ_g = 92.62 nm = 92.62× 10⁻⁹ m

From Rydberg's formula, we can calculate a higher level of energy,

\(\frac{1}{λ} = R(1/n_1^2-1/n_2^2)\)

Where R =  Rydberg's Constant

R = 1.097 × 10⁷ m⁻¹

So,

1/(92.62 × 10⁻⁹) = 1.097 × 10⁷(1/1² - 1/n₂²)

0.9842 = 1 - 1/n₂²

1/n₂² = 1 - 0.9842

1/n₂² = 0.0158

n₂ = √(1/0.0158)

n₂ ≈ 8

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Answer:

It is characterized by fast, quick passes down the court and using more players on the attack than the opposition has for their defense. Slower, more deliberate play characterizes the slow-break style. This technique calls for more thoughtful action; players maneuver carefully in order to shoot in this type of offense.

Answer:

Normal, Gravitational, Applied, Friction, and Tension

Explanation:

Because the sled is on the ground, or rather because it is on the earth, it will have a force of gravity, or its weight, pulling it down.

There is a normal force because the sled is not moving into the ground, so there needs to be a force pushing on the sled from the ground. Additionally, Newton's 3rd law states that for every action there is an equal but opposite reaction, if it's in equilibrium or not moving.

There will be an applied force since the child is pulling the sled and is applying a force to do so.

There will be a friction force that is pulling the sled opposite the direction it is moving, since it is on the ground that is presumably not fricitonless.

There will be a tension force pulling on the sled by the rope. However there is also a tension force pulling on the child's hand by the rope, meaning that these are internal forces and essentially balance out, but they are still there.

There is no air resistance force, or very little of it, since the object is not falling.

Answer:

Power = 2.45Kw or 2450 Watts.

Explanation:

Given the following data;

Mass, m = 250kg

Height, h = 2m

Time, t = 2secs

We know that acceleration due to gravity, g is equal to 9.8m/s²

Power can be defined as the energy required to do work per unit time.

Mathematically, it is given by the formula;

\( Power = \frac {Energy}{time} \)

But Energy = mgh

Substituting into the equation, we have

\( Power = \frac {mgh}{time} \)

\( Power = \frac {250*9.8*2}{2} \)

\( Power = \frac {4900}{2} \)

Power = 2450 Watts

To convert to kilowatt (Kw), we would divide by 1000

Power = 2450/1000

Power = 2.45Kw.

Therefore, the average power output of the weightlifter is 2.45 Kilowatts.

The average power output of the weight lifter who can lift the given mass is 2450 Watts.

Given the data in the question;

Power is the amount of energy transferred per unit time. It is expressed as:

\(P = \frac{W}{\delta t}\)

Where W is work done and t is elapsed time.

So, we find the work done

Work done = Force × Displacement

Since Force = Weight = m × g

Where g is acceleration due to gravity ( \(9.8m/s^2\) )

Hence

\(Work\ done = mg * d\\\\Work\ done = 250kg\ *\ 9.8m/s^2\ *\ 2.0m\\\\Work\ done = 4900kg.m^2/s^2\)

We substitute our value into the previous equation

\(P = \frac{Work\ done}{\delta t}\\\\P = \frac{4900kg.m^2/s^2}{2.0s} \\\\P = 2450kg.m^2/s^3\\\\P = 2450J/s\\\\P = 2450W\)

Therefore, the average power output of the weight lifter who can lift the given mass is 2450 Watts.

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Answer: Question 10: I believe the answer is C, hope this helps!

Explanation:

well, you get some DNA from both of your parents, so when you hear the phrase, "You have your mother's eyes!" That means you have some of your mother's DNA that gave you her eye color. The DNA you get from your parents help determine how you look today

The kangaroo's horizontal speed will be 9.7 m/s and its departure speed will indeed be 10.65 m/s.

By observing the pace at which this compressed region moves through the medium, we may determine the sound speed. The sound wave travels at a speed of around 343 meters per second in low humidity at 20 degrees Celsius.

The following equation relates the distance to the direction and initial velocity:

d = [v₀²sin2θ]/g, where θ – the angle of the jump.

Thus, v₀² = gd / (sin2θ) = (9.8×8)/0.69 = 113.62

v₀ = 10.65 m/s ( the take off speed).

The horizontal velocity equals:

vₓ = v₀cos 22° = 10.65 m/s × 0.92 = 9.7 m/s

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1. A curve with points of both positive and negative curvature but never zero curvature is possible. One example is the curve formed by a twisted ribbon.

2. A curve with a parametrization γ having speed equal to 2 and curvature equal to 3 is possible. One example is the helix curve.

3. A curve with a parametrization γ having unit speed but zero acceleration is not possible. Such a curve would violate fundamental principles of motion.

1. To have points of both positive and negative curvature but never zero curvature, we can consider a twisted ribbon. Imagine a ribbon that is twisted in a way that its cross-section follows a sinusoidal wave pattern along its length. This ribbon curve will exhibit regions of positive and negative curvature, depending on whether the ribbon is twisting in a clockwise or counterclockwise manner. However, it will never have zero curvature since it is always twisted.

2. For a curve to have a parametrization γ with speed equal to 2 and curvature equal to 3, we can consider a helix curve. A helix is a spiral curve that extends in three dimensions. It has a constant radius and a constant rate of rotation, resulting in a constant curvature along the curve. By appropriately adjusting the parameters of the helix, such as the pitch and radius, we can achieve a curve where the speed is 2 units and the curvature is 3 units, satisfying the given conditions.

3. A curve with a parametrization γ having unit speed but zero acceleration is not possible. According to the fundamental principles of motion, the acceleration of an object is related to its curvature. In the context of parametrized curves, the acceleration is given by the second derivative of the position vector with respect to time. If the acceleration is zero, it implies that the second derivative of the position vector is zero, which means that the curve is a straight line. However, a straight line cannot have a unit speed parametrization since its speed would be infinite. Therefore, it is not possible for a curve to have a parametrization with unit speed but zero acceleration.

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Answer:

2.3 x 10-13 F

Explanation:

From the question,

Applying

C = e₁e₂A/d..................... Equation 1

Where C = Capacitance of the capacitor, d = distance of seperation, A = cross sectional area of the capacitor, e₁ = permitivity of free space, e₂ = relative permitivity of vacuum.

But,

Area of a circle (A) is given as

A = πr²................... Equation 2

Where r = radius of the capacitor.

Substitute equation 2 into equation 1

C = e₁e₂πr²/d............... Equation 3

Given: r = 2.5 mm = 0.0025 m, d = 0.75 mm = 0.00075 m

Constant; e₁ = 8.85×10⁻¹² F/m, e₂ = 1 F/m, π = 3.14.

Substitute these values into equation 3

C =  [(8.85×10⁻¹²)(1)( 0.0025²)(3.14)]/(0.00075)

C = 0.23×10⁻¹²

C = 2.3×10⁻¹³ F

Answer:

A

Explanation:

edge

Answer: yes

Explanation: it's fueled by nuclear reactions that fuse hydrogen atoms together into helium and other heavier elements, releasing huge amounts of energy in the process.

Answer: 11 meters

Explanation: i'm rlly sorry if i am wrong

Mars has a thin atmosphere unlike Venus hence their surface temperature varies despite both Mars and Venus having atmospheres with mostly Carbon Dioxide

Venus and Mars are the solar system's planets, and their temperatures differ. Mars has a thin atmosphere that cannot withstand much heat.

Mars is the fourth planet in the solar system, also known as the red planet . It contains less oxygen gas than carbon dioxide. It is has a thin atmosphere and is made up of various gases.

Unlike Venus, Mars' thin atmosphere cannot retain heat and instead radiates it back into space. Venus has a thick atmosphere. It traps heat and raises the surface temperature. Mars' atmospheric particles cannot store energy and thus vary in temperature.

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Amplitude

1.25 cm

1.00 cm

.75 cm

.50 cm

Frequency

2.10 Hz

2.10 Hz

2.10 Hz

2.10 Hz

Wavelength

0.6

0.5

0.4

0.24

The relationship between wavelength and frequency is inversely proportional. As the frequency of a wave increases, the wavelength decreases.

The relationship between wavelength and amplitude is not a direct one. Amplitude refers to the height or intensity of a wave, while wavelength refers to the distance between two consecutive peaks or troughs of the wave. Therefore, amplitude and wavelength are not directly related, but amplitude can affect the energy carried by the wave, which can affect the propagation of the wave.

In order to determine the wavelength, both the frequency and the speed of the wave are required. The relationship between wavelength, frequency and speed is given by the equation:

wavelength (λ) = speed of wave (v) / frequency (f)

The values of speed of wave and frequency are not provided.

Therefore, the correct answers are as given above

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Answer:

88 m ^2

Explanation:

Answer: b) 10.0 m/s

Explanation: Acceleration = \(\frac{v-u}{t}\)

V-U
 T

v= final velocity
u= initial velocity
t= time in secs

Answer:

ur mom go study nerd u for real