Christopher, who weighs 240 N, and Thomas, who weighs 185 N, are sitting on opposite ends of a balanced seesaw. If Thomas is sitting 1.2 m from the balance point, how far is Christopher sitting from the balance point

The time taken to reach one crest is 0.5731 s. Then the time period of the wave is 1.146 s. The frequency is the inverse of the period that is 0.87 Hz.

The time period of a wave is the time required to complete one wave cycle. For a transverse wave the period of the wave is the time required to reach from one crest to the next crest of the wave.

Given that, time to reach one crest = 0.5731 s.

then the time for to the next crest from the equilibrium position is :

T = 0.5731 s× 2 = 1.146 s.

Frequency of a wave is the number of wave cycles per second. It is the inverse of time period of the wave.

Hence, frequency = 1/T

ν = 1/ 1.146 s = 0.87 Hz.

Therefore, the period of the wave is 1.14 s and frequency is 0.87 Hz.

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Answer:

Lo primero que hay que recordar es la relación:

Velocidad = Distancia/tiempo.

Para el caso de Pedro, el vive a 5km de la escuela (es decir, para llegar a la escuela, el debe recorrer -5km, entonces la distancia es -5km), y recorre esa distancia en 0.25 horas, entonces su velocidad es:

Velocidad = -5km/0.25hr = -20km/h

Esto significa que Pedro se mueve con una velocidad de -20km/h, lo que significa que se mueve hacia el oeste con un módulo de 20km/h

Para el caso de Juan, el vive a -4km de la escuela, entonces el tendrá que recorrer 4km para llegar a la escuela, y los recorre en 0.25 horas, entonces su velocidad sera:

Velocidad = 4km/0.25h = 16 km/h

Lo que significa que Juan tiene una velocidad de 16km/h hacia el este.

Answer:

B. I DID IT AND GOT IT RIGHT

Explanation:

Answer:

It is B

Explanation:

i did this one

The expression for the time period using method of dimensions is \(T = [L]^{1/2}\times [LT^{-2}]^{-1/2}\).

The period of oscillation of a simple pendulum is the time taken for the pendulum to make a complete rotation.

The period of oscillation of a simple pendulum is calculated as;

\(T = 2\pi \sqrt{\frac{l}{g} }\)

where;

L is length (m)

g is acceleration due to gravity (m/s²)

The expression for the time period using method of dimensions is given as;

\(T = [L]^{1/2}\times [LT^{-2}]^{-1/2}\)

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Answer:

(C) 700 N

Explanation:

The given parameters are;

The mass of the mountain climber, m = 100 kg

The angle formed by the rope with the horizontal, θ = 45°

The gravitational field strength, g = 10 N/kg

The weight of the man, W = m × g

∴ W = 100 kg × 10 N/kg = 1,000 N

At equilibrium, we have;

The downward force, the weight of the man, W = The upward force, the vertical component of the tension on the two halves of the rope

We have;

W = T × sin(θ) + T × sin(θ)

∴ 1,000 N = 2 × T × sin(45°)

Therefore, we have;

T = 1,000 N/(2 × sin(45°)) = 707.106781 Newtons

Therefore, the tension in the rope is closest to (approximately) 700 N.

Answer: Experimental design means creating a set of procedures to test a hypothesis. A good experimental design requires a strong understanding of the system you are studying. By first considering the variables and how they are related (Step 1), you can make predictions that are specific and testable (Step 2).

Explanation:

B) The statement is false. The mass of the fully fueled space shuttle is not 16 times its empty mass.

While the space shuttle does carry large amounts of fuel, the increase in mass due to fuel is not as significant as implied in the statement.

The space shuttle is designed to carry both its own weight and the weight of the fuel required for its mission. However, the mass of the fuel is not equal to 16 times the empty mass of the shuttle. The actual ratio of the fully fueled mass to the empty mass depends on various factors, including the specific mission requirements and payload.

Fuel is necessary for the space shuttle to achieve and maintain orbit. Once in space, the shuttle uses its engines to counteract the gravitational pull of the Earth and stay in orbit. However, the amount of fuel needed is carefully calculated to optimize the shuttle's performance and achieve the desired mission objectives. Carrying excessive fuel would increase the mass and operational costs of the shuttle without providing significant benefits.

Therefore, while the space shuttle does carry a considerable amount of fuel, it is not accurate to say that its fully fueled mass is 16 times its empty mass.

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Answer:

20 m

Explanation:

1 s = 4 m

5 s = ?

? = (4 x 5) = 20 meters

Answer:

distance = 0.8 m

Explanation:

given:

A bike travels at a constant speed of 4.0 m/s for 5.0s.

find:

How far does it go?

solution:

distance = speed / time

distance = 4.0 m/s

                     5 sec.

distance = 0.8 m

The gas state of a substance that is normally a solid or a liquid at room temperature occurs when the substance undergoes a phase change from solid or liquid to gas.

This phase change is known as sublimation for solids and evaporation for liquids. The temperature and pressure conditions at which sublimation or evaporation occurs depend on the substance's properties, such as its intermolecular forces and molecular weight. For example, dry ice (solid carbon dioxide) sublimes at -78.5°C and atmospheric pressure, while water (a liquid at room temperature) evaporates at 100°C and atmospheric pressure. The gas state of normally solid or liquid substances has many practical applications, such as in refrigeration, gas storage, and chemical synthesis.

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Suppose each bulb has resistance r . with bulb c in place, bulbs b and c are in blank and have equivalent resistance blank. This implies that if we remove bulb C and replace it with an identical bulb, the resistance of the circuit will remain the same

Suppose each bulb has resistance r. When bulb C is in place, bulbs B and C are in series and have an equivalent resistance of 2r. In a series circuit, the total resistance is the sum of the individual resistances. When bulbs B and C are in series, the current flowing through them is the same. Thus, the total resistance is the sum of their resistances, which in this case is r + r = 2r. In a series circuit, the same current flows through each component. This means that if bulb C has resistance r and is in series with bulb B, the current passing through bulb B is also the same. The voltage across the bulbs is divided between them based on their resistances, and since they have the same resistance r, they receive equal voltage. So, with bulb C in place, bulbs B and C are connected in series and have an equivalent resistance of 2r. This implies that if we remove bulb C and replace it with an identical bulb, the resistance of the circuit will remain the same. Series circuits allow the current to flow through each component one after another, while the voltage divides between them.

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Answer:

1.667 m/s ^2

Explanation:

we use the formula F=ma

F= 12.5 N

m= 7.5 kg

a=?

F=ma

12.5= 7.5 x a

a= 12.5/7.5

a= 1.667 m/s^2

Answer:

Volume = 6.5499 x 10²³ cm³

Explanation:

The surface area of the ocean is given as follows:

Surface Area = (166241700 km²)(1 x 10¹⁰ cm²/1 km²) = 1.662417 x 10¹⁸ cm²

and the depth is given as:

Depth = 3940 m = 3.94 x 10⁵ cm

Therefore, the volume of the ocean can be given as follows:

\(Volume = (Surface\ Area)(Depth)\\Volume = (1.662417\ x\ 10^{18}\ cm^2)(3.94\ x\ 10^5\ cm) \\\)

Volume = 6.5499 x 10²³ cm³

A. The equivalent resistance of the circuit is 680 ohms

B. The current in the circuit is 0.018 A

C. The potential difference across R₃ is 2.16 volts

The equivalent resistance of the circuit can be obtained as follow:

R = R₁ + R₂ + R₃ (series arrangement)

R = 210 + 350 + 120

Equivalent resistance = 680 ohms

The current in the circuit can be obtained as follow:

Voltage (V) = Current (I) × resistance (R)

12 = Current × 680

Divide both sides by 40

Current = 12 / 680

Current = 0.018 A

The potential difference across R₃ can be obtain as follow:

Voltage (V) = Current (I) × resistance (R)

Potential difference across R₃ = 0.018 × 120

Potential difference across R₃ = 2.16 volts

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Answer:

2 lol

Explanation:

Answer:

Sound

Amplitude Wave

Pitch

Strenght

Explanation:

The odd feature about Mathilde is that it had a different shape. It has all the features like Ida, Eros, and Gaspra. Thus, option D is correct.

Mathilde is a type of metal body present in the asteroid belt having an irregular shape. It is different from other asteroids because of its highly elongated and heavily cratered structure in space. It is estimated that the diameter of the Mathilde is around 50 kilometers.

Mathilde does not have any defined shape and the color is also very distinct. Due to its high carbon nature, it looks like dark black color. This type of asteroid is more prone to collisions.

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Dalton's atomic theory is related to the characteristics of atom. The statement describes one of the main principles of Dalton's atomic theory is atoms of same element are identical.

The Dalton's theory states that All matter is composed of extremely small particles called atoms and Atoms of a given element are identical in size, mass, and other properties. Atoms of different element are different.

Hence, the statement describes one of the main principles of Dalton's atomic theory is atoms of same element are identical.

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Answer:

please help

Explanation:

Only one star will be visible. Two stars are 0.1 arcseconds apart, and you use a telescope with a 1 arcsecond angular resolution to take pictures of them.

At radio frequencies, light pollution is more severe than at visible wavelengths. To improve their effectiveness, modern telescopes employ cutting-edge technology. Another slim triangular relation, b = s/fe, provides the angle as the apparent angular size of the pictures as seen via a magnifying lens. Just 206 * (pixel size) / pixels make up the scale (focal length). If your 30 mm guide scope is f/4, then the focal length would be 120 mm. The pixel scale for a typical guide camera, such as the ASI120MM, which has 3.8u pixels, is 206 * 3.8 / 130 = 6.0 arcseconds/pixel.

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Answer: There'll be just one star to see. You use a telescope with a 1-arcsecond angular resolution to snap photos of two stars that are 0.1 arcseconds apart.

Explanation: Compared to visible wavelengths, light pollution is worse at radio frequencies. The most recent technology is used by modern telescopes to increase their efficacy. The angle is given by another thin triangle relation, b = s/fe, which also gives the apparent angular size of the images when viewed via a magnifying glass. The scale is made up of only 206 * (pixel size) / pixels (focal length). The focal length would be 120 mm if your 30 mm guide scope were to be set at f/4. The ASI120MM guiding camera, which has 3.8u pixels, has a pixel scale of 206 * 3.8 / 130, or 6.0 arcseconds/pixel.

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Answer:

uncle

Explanation:why not

The magnitude of the electrostatic force between two point charges can be calculated using Coulomb's law. In this scenario, there are two charges, +20 and -40, separated by a distance of 30 cm. The force vector can be represented using an arrow to indicate its direction.

Coulomb's law states that the magnitude of the electrostatic force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Mathematically, it can be expressed as:

F = k * (|q1| * |q2|) / r^2

where F is the magnitude of the electrostatic force, k is the electrostatic constant (9 x 10^9 N m^2/C^2), |q1| and |q2| are the magnitudes of the charges, and r is the distance between the charges.

In this case, the charges are +20 and -40, and the distance between them is 30 cm (or 0.3 m).

Plugging in the values into Coulomb's law:

F = (9 x 10^9 N m^2/C^2) * (|20| * |-40|) / (0.3^2)

Calculating further:

F = (9 x 10^9 N m^2/C^2) * (20 * 40) / (0.09)

F = (9 x 10^9 N m^2/C^2) * 800 / 0.09

F ≈ 8 x 10^10 N

Therefore, the magnitude of the electrostatic force between the charges is approximately 8 x 10^10 Newtons.

To represent the force vector graphically, we can draw an arrow pointing from the positive charge (+20) towards the negative charge (-40). The length of the arrow can be proportional to the magnitude of the force.

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The acceleration of the object is 2.0 m/s². This means that for every second the object is in motion, its velocity will increase by 2.0 meters per second.

The given information is the net force (N) = 5.0 and the mass (kg) = 2.5. We need to determine the acceleration.


Acceleration is the rate at which an object's velocity changes over time.

It is directly proportional to the net force applied to the object and inversely proportional to its mass.

The formula to calculate acceleration is:

Acceleration = Net Force / Mass

Now, let's substitute the given values into the formula:

Acceleration = 5.0 N / 2.5 kg

Simplifying the equation:

Acceleration = 2.0 m/s²

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Answer:

Vx = 35 x cos(13deg)

Vy = 35 x sin(13deg) - gt  

(g is acceleration due to gravity =~9.8 meter/second^2, t is time in second)

Explanation:

The tiger leaps up, then x and y component of its velocity are:

Vx = Vo x cos(alpha)

Vy = Vo x sin(alpha) - gt

(Vo is tiger's initial velocity, alpha is angle between its leaping direction and horizontal plane)

Hope this helps!

Answer:

probably the trip where it took u 5 seconds

The 21 cm radiation provides information about the gas clouds, including their temperature and density, as well as their magnetic field strength and chemical composition.

The radiation also helps to map out the structure of the Milky Way galaxy and its surrounding regions.21 cm radiation is a type of radio wavelength radiation that is emitted by neutral hydrogen atoms. When these atoms change the direction of their spins, they emit radiation at a wavelength of 21 centimeters. This radiation is able to penetrate dust clouds and other obstacles in space, allowing astronomers to study the gas clouds that make up the Milky Way and other galaxies. The 21 cm radiation provides information about the gas clouds, including their temperature and density, as well as their magnetic field strength and chemical composition. By studying this radiation, astronomers can create detailed maps of the Milky Way galaxy and the regions surrounding it.

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Answer

  96mph

Explanation:

You are given "144 miles in 90 minutes" and what you need to figure out is "144 km in X hours." To go from 90 min to hours, you can do 90 min * 1hr/60min = 1.5 hrs or 144 km in 1.5 hrs or 144 km per 1.5 hours. 144/1.5 = 96.

Answer:

False -    

F = G M1 M2 / R^2

So F depends on M1 and M2 and as long either is not zero there will be a gravitational force between them.

Tennsion 1= horizontal = 484.94 N

Tension 2 = slanted string = 560 N

Explanation

Step 1

Free body diagram

Newton's first law says that if the net force on an object is zero, like in this case the mass is in rest,then that object will have zero acceleration

so

Step 1

set the equations:

a) for x-axis

b) for y -axis

Step 2

Solve the equations

a) solve for T2in equation (2)

b) replace the T2 value in equation (1) to find T1

therefore

Tennsion 1= horizontal = 484.94 N

Tension 2 = slanted string = 560 N

I hope this helps you

Answer:

Because it has more texture and is solid. Its like glass

Explanation:

Answer:

Why is ice more reflective (has higher albedo) than liquid water? They're both the same substance (water). Is something quantum mechanical involved?

Explanation:

In fact ice is slightly less reflective than water. The reflectivity is related to the refractive index (in a rather complicated way) and the refractive index of ice is 1.31 while the refractive index of water is 1.33. The slightly lower refractive index of ice will cause a slightly lower reflectivity. In both cases the reflectivity is about 0.05 i.e. at an air/water or air/ice surface about 5% of the light is reflected.