How does a sound wave transfer energy to your ears ?

Because the current flowing through both bulbs in a series connection is equal, the power P = I2R states that the 60W bulb will expend more power and so be brighter than the 40W bulb (100W bulb).

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Answer:b

Explanation:

b

Answer:

A short circuit is an abnormal connection between two nodes of an electric circuit intended to be at different voltages. This results in an electric current limited only by the Thévenin equivalent resistance of the rest of the network which can cause circuit damage, overheating, fire or explosion.

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Answer:

A short circuit is an electrical circuit that allows a current to travel along an unintended path with no or very low electrical impedance.

Answer:

D. PUSHING A CHILD ON A SWING IS THE BEST ANSWER

Explanation:

EEE

The net force on the block parallel to the incline is

∑ F = -mg sin(θ) = ma

where m is the mass of the block, g = 9.8 m/s² is the acceleration due to gravity, θ is the angle the incline makes with the horizontal, and a is the acceleration of the block. Solving for a gives

a = -g sin(θ)

so the block would slide down the incline with acceleration

a = - (9.8 m/s²) sin(30°) = -4.9 m/s²

Answer:

The single touch method of making a magnet is a simple way to magnetize a ferromagnetic material, such as a piece of iron. The process involves taking a magnet and bringing it into contact with the material to be magnetized, while moving it along the length of the material in a single direction. This process aligns the magnetic domains within the material, causing it to become magnetized. The strength of the resulting magnet depends on the strength of the magnet used and the length of time it is in contact with the material.

The process of making an electromagnet involves using an electric current to create a magnetic field. To make an electromagnet, a wire is wound into a coil around a magnetic core, such as an iron rod. When an electric current flows through the wire, it creates a magnetic field around the coil, which in turn magnetizes the magnetic core. The strength of the resulting magnet depends on the strength of the current flowing through the wire, the number of coils in the wire, and the type of magnetic core used. Electromagnets are commonly used in a variety of applications, including electric motors, speakers, and MRI machines.

Explanation:

The specific gravity of wood is 0.853, which allows for an apparent mass of 0.047 kg of wood to sink in alcohol.

Mass of wood = 0.48 kg

It floats on water. So ? wood Alcohol apparent mass equals 0.035 kilogramme

Loss in mass = 0.48 - 0.035 = 0.445 kg = mass of alcoholdisplaced

Volume of alcohol displaced = 0.445/790 = 5.63×\(10^{-4}\) \(m^{3}\) = Volume of wood

Density of wood = Its mass / volume = 0.48/5.63×\(10^{-4}\) = 853 kg    \(m^{-3}\)  

Wood's specific gravity is equal to its density divided by the density of water, which is

= 853 /1000

= 0.853

Technically speaking, specific gravity is a measurement of the density of wood in relation to water. (So the specific gravity of a piece of wood would be 1.00 if it has the same density as water.) The moisture level of the wood has a significant impact on the density measurement, as it does with all measurements of density for wood. The more moisture the wood has, the denser it will be.

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Answer:

Replication Crisis

Explanation:

Replication crisis in psychology- It refers to the concerns about credibility of finding the results in psychological science.

Answer: the water level would rise since the pebble displaces minimal water compared to the boat.

Explanation:..........

The jet of water emerges with a speed v horizontally. Then, it falls a vertical distance of 1.58, and during the time of its fall until it hits the ground, it travels a distance of 0.586 meters.

Since the water moves according to the Projectile Motion formulas, the horizontal motion is uniform and the vertical motion is uniformly accelerated from rest.

Then, we can use the vertical distance to find the time that it takes for the water to reach the ground. Then, divide the horizontal distance traveled by the water by the time it took for the water to fall to find the horizontal speed of the water.

Finally, use Torricelli's Theorem to relate the height of the water above the hole in the pipe to the horizontal speed. Find the height of the hole by isolating it and replacing the value of the known variables.

Step 1: Time

Since the water falls from rest a distance of 1.58m, and the time it takes for an object to fall a distance d in free fall from rest is given by:

Then, replace d=1.58m and the value of the acceleration of gravity g=9.81m/s^2 to find the time it takes for the water to fall:

Step 2: Speed

Since the water travels a horizontal distance of 0.586m during that time, then, the speed of the water jet as it emerges from the hole, is:

Step 3: Height (Torricelli's Theorem)

According to Torricelli's Theorem, the speed of a liquid jet emerging from a hole located a distance h below the level of water of a large container, is:

Isolate h from the equation:

Replace v=1.032496477...m/s and g=9.81m/s^2 to find the height of the water above the hole in the tank:

Write the answer in cm:

Therefore, the height of the water above the hole in the tank is 5.43 centimeters.

Answer:

Force = 533.33N

Explanation:

Given the following data;

Power = 40000watt

Velocity = 75m/s

To find the force;

\( Power = force * velocity \)

Making force the subject of formula, we have;

\( Force = \frac {Power}{velocity}\)

\( Force = \frac {40000}{75} \)

Force = 533.33N

A circuit that has gaps that stop electrons from flowing from one side of the power source to the other is called an open circuit.

An open circuit is a type of electrical circuit where there is a gap or interruption in the conducting path, preventing the flow of electrons from one side of the power source to the other. In an open circuit, the circuit is incomplete, and current cannot flow through it. This interruption can occur due to a disconnected wire, a broken component, or a switch that is turned off.

When a circuit is open, there is a gap in the path that electrons would normally follow. Electrons are negatively charged particles that move from the negative terminal of the power source (such as a battery) to the positive terminal in a complete circuit. However, in an open circuit, the electrons cannot complete their journey and flow stops.

An open circuit can be compared to a broken bridge, where there is no continuous pathway for cars to cross from one side to the other. Without a complete path for electrons to flow, the circuit does not function, and devices connected to it will not receive power or operate.

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The Oort cloud is the proximate source of observed nearly parabolic, so-called 'new' comets entering the planetary region, and is also the presumed source of the long-period comet flux and the majority of Halley-type comets (HTCs).

The oort cloud is important for understanding the formation of the solar system.

It is believed to be an important source of comets that can provide valuable information about the conditions and processes that were present in the early solar system.

Here,
The Oort Cloud is important for understanding the formation of the solar system because it is believed to be a reservoir of icy bodies that formed early in the solar system's history. These icy bodies, which include comets, are thought to have played a key role in the early evolution of the solar system by delivering water and other volatile materials to the inner solar system, including the early Earth.

By studying the composition and properties of comets from the Oort Cloud, scientists can gain insights into the formation and evolution of the solar system and learn more about the conditions that were present in the early solar system.

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Answer:

the stars which are red in color are cool.

Explanation:

The stars which has reddish color are cool in nature while those stars which has white and blue in color are very hot in nature. The stars change its color when they becomes hotter , first the star color reddish when they are cool but with increasing temperature it changes the color from reddish to orange then yellow. After yellow it turns green and finally get blue color when the stars are very very hot.

Answer:

True

Explanation:

1 cycle every 5 sec is the same when you set up the ratio as 1/5

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Answer:

Continental Rift

Explanation:

I had earth science in 2020-2021 my freshman year. Rifting can be caused when hot material from a mantle plume reaches the base of a continental plate and causes the overlying lithosphere to heat up. In addition to this the upwards movement of the plume against the base of the plate results in extensional forces which can cause rifting.

The correct answer is B) strike-slip fault. It is the type of fault that has no vertical motion of rocks associated with it. Instead, the rocks move horizontally past each other, resulting in a side-to-side motion.

This type of fault does not involve any vertical motion of the rocks, and therefore has no associated vertical motion of rocks associated with it. Like shear faults, strike-slip faults also have no vertical motion of rocks associated with them. In a strike-slip fault, the rocks on either side of the fault move horizontally in opposite directions. This type of fault is also known as a 'lateral fault' since there is only horizontal movement along the fault plane.

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\(\displaystyle \triangle x = 0.904353 \ m\)

Physics

Energy

Gravitational Potential Energy Formula: \(\displaystyle U_g = mgh\)

Spring Potential Energy Formula: \(\displaystyle U_k = \frac{1}{2}k \triangle x^2\)

Law of Conservation of Energy

Math

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Step 1: Define

Identify

[Law of Conservation of Energy] \(\displaystyle U_g = U_k\) → \(\displaystyle mgh = \frac{1}{2}k \triangle x^2\)

[Given] m = 45 kg

[Given] h = 15 m

[Given] k = 55000 n/m

[Solve] Δx

Step 2: Solve for Δx

Topic: AP Physics 1 - Algebra Based

Unit: Energy

Book: College Physics

Answer:

(a) Ascend at 0.8 vertical meter/meter

(b) Descend at -0.2·√2 vertical meter/meter

(c) In the (-0.6, -0.8) direction. The path begins at 45° to the horizontal

Explanation:

The given equation of the shape of the hill is z = 2000 - 0.005·x² - 0.01·y²

The current location = (60, 40, 1966)  

The direction of the positive x-axis = east

The direction of the positive y-axis = north

(a) Walking due south = Reducing the y-value 40

From the equation, the elevation varies inversely with the motion towards the north

Therefore, walking south increases the elevation, and we ascend

The rate is given by the partial derivative at in the -j direction, which is 0.02

The rate is therefore 40 × 0.02 = 0.8

(b)The unit vector in the northwest direction u = 1/√2·(-1, 1)

∴ The rate = (-0.01(60), -0.02(40))·u = (-0.6, -0.8)·1/√2·(-1, 1) = -0.2·√2

Therefore we descend

(c) The slope is largest in the grad of the function at the point (60, 40) which is given as follows;

d(2000 - 0.005·x² - 0.01·y² )/dx, d(2000 - 0.005·x² - 0.01·y² )/dy = (-0.6, -0.8)

Therefore, the direction is tan⁻¹(-0.8/-0.6) ≈ S 36.87° W

The slope =(√((-0.4)² + (-0.8)²) = 1

Therefore, the angle is 45° to the horizontal.

Answer:

The specific activity is approximately 4.8557 × 10^(-30) Ci/g.

Explanation:

To calculate the specific activity, we need to determine the number of disintegrations per second (dps) for the given isotope and then convert it to curies (Ci) per gram (g).

Given:

Mass of the isotope (m) = 1.3 g

Number of β− particles emitted per hour (N) = 4.13 × 10^8 particles/hour

To calculate the specific activity, we can follow these steps:

Step 1: Convert the number of β− particles emitted per hour to dps.

Number of β− particles per second (n) = N / 3600 (since there are 3600 seconds in an hour)

n = (4.13 × 10^8 particles/hour) / 3600 = 1.1472 × 10^5 particles/second

Step 2: Calculate the disintegration constant (λ) using Avogadro's number (Na) and the mass of the isotope (m).

λ = n / (Na * m)

Na = 6.022 × 10^23 mol⁻¹ (Avogadro's number)

m = 1.3 g

Substituting the values:

λ = (1.1472 × 10^5 particles/second) / (6.022 × 10^23 mol⁻¹ * 1.3 g)

λ = 1.7954 × 10^(-19) s⁻¹

Step 3: Convert the disintegration constant (λ) to curies per gram (Ci/g).

1 Ci = 3.7 × 10^10 disintegrations/second

Specific activity = λ / (3.7 × 10^10 Ci/g)

Specific activity = (1.7954 × 10^(-19) s⁻¹) / (3.7 × 10^10 Ci/g)

Specific activity = 4.8557 × 10^(-30) Ci/g

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Answer:

B

Explanation: You (with the ball in your hand)would move in the direction of the ball's initial motion. Momentum!

Answer: You would move backward.

Explanation: You would push back because you would move in the direction of the ball's initial motion.  The ball's initial motion is to come toward you, so you would most likely move backward.

Let me know if this is right! :)

Answer:

Explanation:

The wording on some of these choices is very strange; I'm not sure exactly what they are stating. First of all, A. is definitely a choice because if both the charges were opposite, they would be attracted to one another as opposed to be repelled away from one another, as they are when they are both positive. What happens is that the charges go OUT from the positive charge and INTO the negative; so as far as the field lines around both charges would change direction...no; only the direction of the field lines would change on the positive charge (which is the one on the left). In that space where D is filled in by the field lines going OUT of the positive charge and INTO the negative one, the lines there are naturally closer together, and that is the point where the charge is the greatest. So if that is what is meant by the field lines getting closer together, then yes, they do. As far as choice D. again the field lines on the negative charge don't change, only the ones on the positive charge change.

The arrows on the field lines surrounding the negative charge would need to point toward instead of away from the charge.

These pattern of lines, sometimes referred to as electric field lines, point in the direction that a positive test charge would accelerate if placed upon the line. As such, the lines are directed away from positively charged source charges and toward negatively charged source charges.

“ When an object has more electrons than protons then the object is said to be negatively charged.”

“When an object has more protons than electrons, the object is said to be positively charged.”

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❄ Hi there.

a pencil is composed mostly of wood.

Let's check if the other choices are right.

A. Sweaters are not made of wood

B. Tiles are not made of wood

C. Pencils are made of wood

D. Bricks are not made of wood

∴ the right choice is C.

❄

Answer: The table that would organize and summarize the class data on pH levels of the different soil types is found in the attachment below.

Explanation: As an A+ student, I love to help people on brainly in my free time! If this answer helped you, please click the heart, click the crown to give brainliest and give a 5 star rating! I'd appreciate it if you did at least one of those <3 Have a great day.