What must happen to a sound making object for it to make sound?
A: it must be made of metal
B: it must be in a vacuum
C: it must have force applied to it
D: it must be bent

Answer:

the answer is 375°F

Explanation:

you simply subtract 250°F from 625°F

The tοtal energy οf the system is 0.0181 J.  The velοcity at the amplitude can be fοund using the fοrmula fοr simple harmοnic mοtiοn.

Energy plays a crucial rοle in virtually every aspect οf οur lives and is invοlved in everything frοm the mοvement οf οbjects tο the functiοning οf οur cells and οrgans. Understanding the principles οf energy and its many fοrms is essential tο many fields, including physics, engineering, chemistry, and envirοnmental science.

Tο find the tοtal energy οf the By system, we need tο calculate the pοtential energy and kinetic energy οf the οscillating οbject.

\(U = (1/2) k x^2\)

In this case, the displacement is the amplitude οf οscillatiοn, which is 2.9 cm οr 0.029 m. The spring cοnstant can be fοund using the fοrmula:

k = F/x

The fοrce can be calculated frοm the weight οf the οbject:

F = m g

where m is the mass οf the οbject and g is the acceleratiοn due tο gravity \((9.81 m/s^2)\). Therefοre,

\(F = 0.8 kg \times 9.81 m/s^2 = 7.848 N\)

The spring cοnstant is then:

k = F/x = 7.848 N / 0.088 m = 89.09 N/m

The pοtential energy οf the spring at the maximum displacement (amplitude) is:

\(U = (1/2) k x^2 = (1/2) \times 89.09 N/m \times (0.029 m)^2 = 0.0122 J\)

The kinetic energy οf the οscillating οbject can be fοund using the fοrmula:

\(K = (1/2) m v^2\)

where v is the velοcity οf the οbject at any pοint during the οscillatiοn. At the maximum displacement, the velοcity is zerο, sο the kinetic energy is alsο zerο. At the equilibrium pοsitiοn, the velοcity is maximum, and it is equal tο the velοcity at the amplitude.:

v = ω A

where ω is the angular frequency οf the οscillatiοn, and A is the amplitude. The angular frequency can be fοund using the fοrmula:

ω = √(k/m)

Therefοre,

ω = √(89.09 N/m / 0.8 kg) = 4.195 rad/s

and

v = ω A = 4.195 rad/s × 0.029 m = 0.1217 m/s

The kinetic energy at the amplitude is then:

\(K = (1/2) m v^2 = (1/2)\times 0.8 kg \times (0.1217 m/s)^2 = 0.0059 J\)

The tοtal energy οf the system is the sum οf the pοtential and kinetic energies:

E = U + K = 0.0122 J + 0.0059 J = 0.0181 J

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The relative density of aluminum is 2.7. This means that aluminum is 2.7 times denser than water, which is the reference substance often used for comparing densities

The relative density (also known as specific gravity) of a material is the ratio of its density to the density of a reference substance. In this case, we are given the density of aluminum as 2.7 x 10^3 kg/m^3.

To find the relative density, we need to compare it to the density of the reference substance. The most commonly used reference substance for relative density is water, which has a density of 1000 kg/m^3.

Relative density = Density of the material / Density of the reference substance.Relative density = (2.7 x 10^3 kg/m^3) / (1000 kg/m^3)

Relative density = 2.7

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Answer:

200seconds

Explanation:

Q=IT

1000c=5T

T=1000/5

T=200secs

I hope this will help

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Answer:

power

Explanation:

Answer:

power

Explanation:

Drawing (d) best represents the system after the stopcocks are opened and the system is allowed to come to equilibrium, as it shows equal pressure in all three bulbs.

Since the two bulbs contain different gases, the pressures in each bulb will be different. When the stopcocks are opened, the gases will flow into the empty bulb until the pressures are equalized. The final state will have equal pressure in all three bulbs.

What is an equilibrium?

An equilibrium is a state of balance or stability achieved in a chemical reaction when the forward reaction rate is equal to the reverse reaction rate. In other words, it is the point at which the concentrations of reactants and products no longer change with time, because the rates of the forward and reverse reactions are equal.

At equilibrium, the amounts of reactants and products are governed by the equilibrium constant (K), which is a measure of the relative concentrations of the reactants and products at equilibrium.

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Answer:

q₂ = -4.80 10⁻⁴  C  = - 0.48 mC, charge is negative

Explanation:

Let's use coulomb's law

           F = \(k \frac{q_1 q_2}{r^2}\)

and the sum of forces, remember that charges of the same sign repel and of different sign attract

           ∑ F = F₁₃ + F₂₃           (1)

Let's start by fixing a reference system located at charge 1 with the positive direction to the right.  In the problem it indicates that the net force on charge 3 is F = - 20.0 N, the negative sign indicates that the force is towards the left

let's look for every force, the charge q₁ = 12 10-⁻³ C and q₃ = 15 10⁻³ C

           F₁₃ =\(k \frac{q_1 q_3}{x_{13}^2}\)

           F₁₃ = 9 10⁹ 12.0 15.0 10⁻⁶ / (5-0)²

           F₁₃ = 64.8 10 3 N

This force is repulsive, that is, it is directed to the right

          F₂₃ = k \frac{q_2 q_3}{x_{23}^2}

          F₂₃ = 9 10⁹ q₂ 15.0 10⁻³ / (5-4)²

          F₂₃ = 135 10⁶ q₂  N

we substitute in equation 1

          -20.0 = 64.8 10³ + 135 10⁶ q₂

           q₂ = (-20 - 64.8 10³) / 135 10⁶

           q₂ = -4.80 10⁻⁴  C

the sign indicates that the charge is negative

a) The net area revealed by the four charges at the point P on the y-axis will be directed outwards from the origin in a radial direction. This can be shown schematically by arrows pointing away from the origin.

Radial direction is a direction that is perpendicular to the tangent of a circle at any given point. It is the same as the radius of a circle and is also known as the normal direction.

b) The contributions of the 1st and 2nd charges to the net area at point P can be expressed as:
Ē₁ =(Q/48πε₀)(1/y)î + (Q/48πε₀)(1/d+y)î
Ē₂ =(Q/48πε₀)(1/d+y)î - (Q/48πε₀)(1/y)î
where Q is the charge of each point, d is the distance between two neighboring charges, y is the distance of point P from the coordinate origin, k is the electrostatic constant and Ī is the unit vector in the x-direction.
c) The net area at point P can be obtained by subtracting the contributions of the 1st and 2nd charges, i.e.,
Enet = Ē₁ - Ē₂ = (Q/48πε₀)(2/d)î
d) Assuming that d = 2cm, Q = 5µC and y = 1m (y >> d), the acceleration of the charge q = - 0.2µC will be given by:
a = qEnet/m = - 0.2µC (Q/48πε₀)(2/d)î/0.5kg = - 0.8µC (Q/48πε₀)î/0.5kg
which is equal to - 6.4 x 10⁻⁶ m/s². The direction of the acceleration will be in the opposite direction of the net area, i.e., towards the origin.
e) The acceleration of charge q does not remain constant during motion because the electric field and thus the net area changes as the charge moves. As the charge moves closer to the origin, the magnitude of the electric field increases, resulting in an increase in the acceleration of the charge. Similarly, as the charge moves further away from the origin, the magnitude of the electric field decreases, resulting in a decrease in the acceleration of the charge.

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Answer:

The answere is A force that pulls objects toward the center of Earth

Explanation:

Hope this helpe! :)

Answer: It's A because I did this test

Explanation:

Answer:

the final particle energy is proportional to

\(Emax \infty\ R^2\)

Explanation:

The computation of the final particle energy is as follows;

As we know that

Energy is respect with the radious as

\(Emax = \frac{q^2R^2B^2}{2m}\)

In the case when other quantities would remains the same or constant

So, the final particle energy is proportional to

\(Emax \infty\ R^2\)

The same is to be considered and relevant too

The linear speed will be the insect be 0.5759 meter/second carried collision with the near stationary photograph.

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

Given that an insect lands 0.1m from the center of the turn table.

Rotational speed of the turn table = 55 rev/min

= (55×2π/60) rad/second

= 5.759 rad/second.

Hence, the speed of the insect be = Rotational speed × length

= 5.759 rad/second × 0.1 M.

= 0.5759 meter/second.

Therefore, the speed of the insect be 0.5759 meter/second.

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Answer:

hola bb como estas dime bb en que te ayudo

Explanation:

Given:

Power = 60 Watts

Work done(Energy) = 5.5e5 Joules

Let's find how long the lightbulb can run.

Apply the formula:

Where:

P is the Power in Watts

W is the work dne in Joules

t is the time in seconds

Since we are to find the time, rewrite the formula for t:

Hence, we have:

Therefore, the lightbulb could run for 9166.67 seconds

ANSWER:

9166.7 seconds

The statement that is true about the theory of plate tectonics and the theory of continental drift C. The theory of plate tectonics gives the method by which continents can move as part of plates .

According to the scientific hypothesis of plate tectonics, the underground movements of the Earth create the primary landforms. By explaining a wide range of phenomena, including as mountain-building events, volcanoes, and earthquakes, the theory, which became firmly established in the 1960s, revolutionized the earth sciences.

The scientist Alfred Wegener is most closely connected with the concept of continental drift. Wegener wrote a paper outlining his notion that the continents were "drifting" across the Earth, occasionally crashing through oceans and into one another, in the early 20th century.

According to tectonic theory, the Earth's surface is dynamic and can move up to 1-2 inches every year. The numerous tectonic plates constantly move and interact. The outer layer of the Earth is altered by this motion. The result is earthquakes, volcanoes, and mountains.

Therefore, option C is correct.

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Answer:

it's from gravity because when you throw something up it goes forward a certain distance

These two statements are true: the wood's momentum is lower than the bullet's starting momentum, and the total energy is lower than the bullet's original kinetic energy.

Pi = Pf, Pbi+Pwi = Pbf+Pwf, MbVbi+MwVwi = Mb Vbf + Mw Vwf, MbVbi + Mw (0) = (Mb + Mw)Vf, and MbVbi = (Mb + Mw)Vf according to the rule of conservation of linear momentum.

As a result, the bullet's initial momentum is smaller than that of the wood.

Consequently, the appropriate choice is (c).

(2) The formula for kinetic energy is Ki = Pi2/2Mb Kf = Pf2 / 2(Mb + Mw).

By dividing the two energies by their ratio, Kf = (Mb / Mb + Mw)Ki and Kf = Pf2 / 2(Mb + Mw) / Pi2/2Mb.

as a result, the appropriate choice is (a).

According to the rule of conservation of momentum, if two objects collide, the force obtained by one object equals the force lost by one.

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The equation to calculate the approximate volume of Mercury (or any sphere) is:

V = (4/3)πr^3

Where V is the volume, π (pi) is a mathematical constant approximately equal to 3.14159, and r is the radius of the sphere.

Therefore, to calculate the approximate volume of Mercury, we can use the equation:

V = (4/3)π(1516)^3

Schedules of reinforcement farm workers are paid x amount of dollars for every basket of fruit that they pick is based on the concept of fixed ratio.

A strengthening timetable, during which an answer or reaction is only strengthened after yet another given reaction can be determined, could be determined as a fixed ratio schedule. The particular topic gives a variety of questionnaires/solutions and therefore is subsequently rewarded by the educator or coach.

The man is under a fixed interval schedule of reinforcement, while the woman is under a fixed ratio schedule of reinforcement. Fixed interval reinforcement is a type of reinforcement that gives reward only after a specific period of time has passed. A fixed ratio reinforcement is a type of reinforcement that is based on production rate.

The other type is variable ratio. Variable Ratio schedule of reinforcement will give a person rewards after he/she fulfil a specific amount of works.

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Answer:

b

Explanation:

The answer is B. Why is the ocean floor not flat and smooth like the bottom of a bathtub?

Scientists were surprised to find that the ocean floor was not a flat and featureless plain, but rather had mountains, valleys, and other geological features. This discovery raised questions about how these features formed and what processes were involved. Scientists began to investigate the causes of these features, such as plate tectonics and volcanic activity, and how they might have shaped the ocean floor over millions of years. Understanding the complex and dynamic nature of the ocean floor has since become an important area of study in earth science and oceanography.

Metals and Alloys have good electrical and thermal conductivities, relatively high strength, high stiffness, ductility or formability, and shock resistance. These materials are particularly useful for structural or load-bearing applications. Correct alternative is option A.

Metals and alloys have good electrical and thermal conductivities, relatively high strength, high stiffness, ductility or formability, and shock resistance.

These properties make them particularly useful for structural or load-bearing applications. Ceramics, polymers, and semiconductors do not have all of these properties and are not typically used for structural or load-bearing applications.

Therefore Metals and Alloys (option a) is the correct alternative.

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Answer:

i think the 2nd one

the first=0 b/c it's initial velocity and final ones are equal the third one is constant

Answer:

The frequency of light can be calculated using the formula:

`c = λv`

Where `c` is the speed of light in a vacuum, `λ` is the wavelength of light, and `v` is the frequency of light.

The speed of light in a vacuum is `3.00 × 10^8 m/s`.

To convert the wavelength from nanometers to meters, we need to divide by `1 × 10^9`.

Thus, the frequency of light with a wavelength of 655 nm is:

`v = c/λ`

`v = (3.00 × 10^8 m/s)/(655 × 10^-9 m)`

`v = 4.58 × 10^14 Hz`

Therefore, the frequency of light with a wavelength of 655 nm is `4.58 × 10^14 Hz`.

Similarly, the frequency of light with a wavelength of 515 nm is:

`v = c/λ`

`v = (3.00 × 10^8 m/s)/(515 × 10^-9 m)`

`v = 5.83 × 10^14 Hz`

Therefore, the frequency of light with a wavelength of 515 nm is `5.83 × 10^14 Hz`.

Finally, the frequency of light with a wavelength of 475 nm is:

`v = c/λ`

`v = (3.00 × 10^8 m/s)/(475 × 10^-9 m)`

`v = 6.32 × 10^14 Hz`

Therefore, the frequency of light with a wavelength of 475 nm is `6.32 × 10^14 Hz`.

So, the frequency of light with a wavelength of 655 nm is `4.58 × 10^14 Hz`, the frequency of light with a wavelength of 515 nm is `5.83 × 10^14 Hz` and the frequency of light with a wavelength of 475 nm is `6.32 × 10^14 Hz`.

Answer:

Terminal velocity occurs when the frictional force of air counteracts the gravitational force of gravity.

In Second image, Both forces are equal and therefore is the correct answer

The average velocity of the rider over the course of his trip to the store is 1.0607m/s.

By definition;

The path of the bike rider towards the west and then towards the north signifies a right angle path.

As such the displacement, s can be given as;

s = √(75² + 75²).

Therefore, the displacement, s = 106.07m

The time taken to cover the 75meters in each direction, t = distance/speed = 150/1.5

Therefore, the time taken = 100s.

The average velocity, v = displacement/time

v = 106.07/100

Therefore, Average velocity, v = 1.0607m/s.

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Answer:

1.1

Explanation:

Answer:

Momentum is a term used in physics to describe an object's resistance to change its motion. It is a measure of an object's mass and velocity and can be mathematically represented by the equation p = mv, where p is momentum, m is mass, and v is velocity.

Momentum is a vector quantity, meaning it has both magnitude and direction. It can be thought of as the amount of motion an object possesses in a particular direction. For example, a large truck traveling at a high speed has more momentum than a small car traveling at a slower speed, even though they both may have the same mass.

In physics, momentum plays a crucial role in determining how objects will react when they collide. If two objects collide and have equal and opposite momentum, they will typically bounce off each other. However, if one object has much more momentum than the other, it is likely to push the other object aside and continue on its original path.

It is also important to note that momentum is conserved in isolated systems. This means that if two or more objects collide or interact with each other, the total momentum before the collision is equal to the total momentum after the collision.

In conclusion, momentum is a fundamental concept in physics that helps to describe and understand the motion of objects. It is a combination of an object's mass and velocity, and it determines how objects will interact when they collide.

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Answer: Limestone Caves

Explanation: The most common feature that can be caused purely by chemical weathering is Karst Landscape, which can lead to caverns and sinkholes.

The calculated magnitude is  6.73 x 10³ V/m.

AMU is described as being one-twelfth the mass of a carbon-12 atom (12C). C makes up more than 98% of the carbon that can be found in nature, making it the most prevalent isotope. The magnitude of the field is the change in potential across a small distance in the indicated direction divided by that distance.

Potential difference = 8.20 kV= 8.20 x 10³ V

radius= 19.4/100=0.194 m

total distance that is circumference of the circle= 2πr =2 x 3.14 x 0.194

                                                                               = 1.218 m

therefore Magnitude= 8.20 x 10³ / 1.218

                                  =6.73 x 10³ V/m

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