A loudspeaker of mass 25.0 kg is suspended a distance of = 2.20m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 3.90 .m What is the tension in each of the cables?

\(\\ \sf{:}\Rrightarrow Q=mc\Delta T\)

\(\\ \sf{:}\Rrightarrow Q=1(4184)(75)\)

\(\\ \sf{:}\Rrightarrow Q=313800J\)

\(\\ \sf{:}\Rrightarrow Q=313.8KJ\)

Answer:

I think they cross the line when they force sports into their child's life, and take away their choice of what they want to do so they essentially waste their childhood preparing for something that may never happen or they just don't get the opportunity to explore their artistic abilities.

Explanation:

In a series circuit, the current is _______

at every point around the circuit. Which of the following completes the sentence?

In a series circuit, the current is equal at every point around the circuit.

Answer:

The option that completes the sentence is;

Equal

Explanation:

A series circuit is a circuit arrangement whereby the components of the circuit are connected in a single chain by joining them end to end, thereby the current flows round the circuit through the singular path of the interconnected component in the circuit and therefore, the current which flows through each component as it flows round circuit, is equal at all points in the circuit.

Therefore, we have that in a series circuit, the current is equal at every point around the circuit.

The number of walking paces as you walk down main street (0.25 miles) is 720 walking paces

1 mile = 5280 feet

Therefore,

0.25 mile = (0.25 mile × 5280 feet) / 1 mile

0.25 mile = 1320 feet

1 feet = 12 inches

Therefore,

1320 feet = (1320 feet × 12 inches) / 1 feet

1320 feet = 15840 inches

22 inches = 1 walking pace

Therefore,

15840 inches = (15840 inches × 1 walking pace) / 22 inches

15840 inches = 720 walking paces

Thus, we can conclude that as you walk down main street (0.25 miles), there are 720 walking paces

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The Height of the roof is 225 feet .

Calculation :

y = h - gt2/2 = 0;

h = gt2/2;

v(t) = dy/dt = - gt;

t = - v(t)/g;

h = g/2·v2(t)/g2

= v2(t)/(2g)

= 120²ft2/s²/(2·32ft/s²) =

225 ft

In mathematics, height is defined as the vertical distance from top to bottom of an object. Also called "height". The term geometry height refers to the measurement of an object along the coordinate geometry's y-axis.

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The approach which currently is proving to be the most promising in determining how life on earth originated is the laboratory simulations of conditions present on the early earth.

The conditions that were present on the early earth were:

The laboratory simulations of conditions on early earth was a chemical experiment named as Miller-Urey experiment, which in 1952 simulated the conditions that were present on the early earth.

In 1952, Stanley Miller and Harold Urey simulated the conditions of early Earth by sealing water, methane, ammonia and hydrogen in a glass flask. Then they applied electrical sparks to the mixture.

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The work function of a metal is the amount of energy required to remove an electron from the surface of the metal.

The kinetic energy of the photoelectron emitted after the metal is illuminated is dependent on the difference between the energy of the incident photon and the work function of the metal. Therefore, if the work function of metal 1 is lower than that of metal 2, it would require less energy to remove an electron from the surface of metal 1. This means that photoelectrons from metal 1 would have higher kinetic energy compared to metal 2.

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They are maintaining their body temperature by cooling down, like dogs do, as they don't have enough sweat glands to keep them cool without panting.

Brown bears maintain body temperature by cooling as a result of panting. So, the correct option is D.

Normal human body-temperature is defined as the typical temperature range found in humans which is commonly referred to as 36.5–37.5 °C. The human body temperature varies. Temperature is known as the degree of hotness or coldness of an area or object.

When we are very hot, the blood vessels of the skin dilate to carry the excess heat to the surface of the skin. Brown bear panting ensures that cool air circulates over the moist surfaces in the mouth which helps maintain body temperature by cooling the body.

Therefore, the correct option is D.

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The satellite's centripetal acceleration is 0.0131 m/s2.

The centripetal acceleration is a = (7.8 km/s)2/(7.0 x 106 m) = 0.0131 m/s2.

The centripetal acceleration of a satellite in a low Earth orbit with a radius of 7.0 x 10^6 m and a speed of 7.8 km/s can be calculated using the equation a = v2/r, where a is the centripetal acceleration, v is the speed, and r is the radius.

Centripetal acceleration is the acceleration that points towards the center of a circular path and is responsible for keeping an object moving in a circular path.

From the formula, it is evident that centripetal acceleration is directly proportional to the square of the velocity of the object and inversely proportional to the radius of the circular path.

This means that higher speeds or smaller circular paths require larger centripetal accelerations to keep the object moving in a circle.

Centripetal acceleration can be provided by various forces, depending on the situation.

For example, when a car rounds a curve, the friction between the tires and the road provides the centripetal acceleration. In the case of an object in orbit around a planet, such as a satellite, the gravitational force of the planet acts as the centripetal force that keeps the object in a circular path.

Centripetal acceleration is a fundamental concept in physics and has numerous practical applications in various fields, including transportation, sports, and astronomy.

Understanding centripetal acceleration is crucial for comprehending the dynamics of circular motion and designing systems that involve objects moving in circular paths, such as vehicles on curved roads or satellites in orbit.

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Answer:

the first one

Explanation:

Answer:

Light travels at the same speed even if the light source is moving.

Explanation:

I took the test, hope this helps :)

Answer:

The answer is C. More water is entering the oceans from melting sea ice than is leaving through evaporation.

Explanation:

Answer:

Option C

Explanation:

Options A and B are false as they do not make sense (it's quite obvious hehe)

Option D is false are when water warms, it doesn't condense:(

Hence, option C is the only correct option:)

Answer:

In a 13.2 cm³ block of Aluminum (density of 2.70 g/cm³) there are 1.32 moles.

To find the number of moles of aluminum in a 13.2 cm³ block of the metal substance, we need to use the formula:

moles = mass / molar mass

We know the density of aluminum is 2.70 g/cm³, and the volume of the block is 13.2 cm³. We can use these values to find the mass of the block:

mass = density × volume

mass= 2.70 g/cm³ × 13.2 cm³

mass= 35.64 g

Now, we need to find the molar mass of aluminum. The atomic mass of aluminum is 26.98 g/mol, so the molar mass is 26.98 g/mol.

Finally, we can plug in the values we found into the formula:

moles = mass / molar mass  

moles= 35.64 g / 26.98 g/mol

moles = 1.32 mol

Therefore, there are 1.32 moles of aluminum in a 13.2 cm³ block of the metal substance.

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Geber’s role in the history of science is the spread of Arabic alchemical theories throughout western Europe.

Geber is an Islamic scholar of the Middle Ages who is considered the father of alchemy and one of the founders or pioneers of pharmacology and modern chemistry.

Geber accepted most of the Arabic alchemical theories and spread them throughout western Europe.

Geber assumed that all metals are composed of sulfur and mercury and gave detailed descriptions of metallic properties in those terms.

He also explained the use of an elixir in transmuting base metals into gold.

Thus, the Geber’s role in the history of science is the spread of Arabic alchemical theories throughout western Europe.

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Answer:

1. B

2. B

Explanation:

1. he was the only teacher at that time that figured out that everything doesn't revolve around us. he figured it out by a telscope he made from three lens and a tube. its actually pretty cool. He found out that venus first was in front of us.

2. if the earth wasn't at a tilt, then we wouldn't have sessons, when the earth rotate around the sun, the earth is roataing at a title axis. and that changes our seesons, because if we are in south america, and we are in winter time, and south america is cold, then it means that the continent is not getting as much heat from the sun. Does that makes since, because it doesn't sound like it?

The gauge pressure needed to water line the base is 3.58 × \(10^-^6\) Pa

The pressure measured in relation to the surrounding atmospheric pressure is known as gauge pressure. A diaphragm sensor can be used to measure gauge pressure, with one side of the diaphragm exposed to the pressure medium that has to be measured and the other exposed to the surrounding atmospheric pressure.

The most popular technique for determining pneumatic pressure is gauge pressure. It is the system's compressed air's relative pressure. Depending on whether the gauge pressure level is above or below the reference atmospheric pressure, it can either be positive or negative.

P = rho x g xh

= 1000kg/m3 x 9.8 N/kg x 1200 ft

= 1000kg/m3 x 9.8 N/kg x 365.76 m

= 3584448 Pa

= 3.58 × \(10^-^6\) Pa

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In the case, the heat must be removed to maintain the bearing at constant temperature 0.8 W

The formula used to determine how much heat must be removed to maintain the bearing at constant temperature is as follows:

Q = 3πμrv/(D1 - D2),

where

Q is the amount of heat removed,

μ is the viscosity of the oil,

r is the radius of the shaft,

v is the velocity of the shaft,

D1 is the diameter of the shaft,

D2 is the diameter of the bearing,

v = (2πnr)/60,

where n is the rotation rate in revolutions per minute (rpm). Given that the crankshaft is 3.175 cm in diameter, D1 = 3.175 cm. Also, the bearing is 3.183 cm in diameter, and the length is 2.8 cm. The radius of the bearing is

r = (3.183 - 3.175)/2

r = 0.004 cm.

The shaft rotates at 1700 rpm, sov = (2π × 1700 × 3.175)/60 = 56.06 cm/s.

μ = 0.01 Pa.s.

Using these values,

Q = 3π(0.01)(0.004)(56.06)/(3.183 - 3.175)

Q ≈ 0.8 W, which is the amount of heat that must be removed to maintain the bearing at constant temperature.

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Answer:

We can use Coulomb's law to solve this problem:

F = k * q1 * q2 / r^2

where F is the force between the two charges, k is Coulomb's constant (k = 9 x 10^9 N m^2 / C^2), q1 and q2 are the magnitudes of the charges, and r is the distance between them.

We know the force F, the distance r, and the magnitude of one of the charges q1. We can rearrange the equation to solve for the magnitude of the other charge q2:

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

Substituting the values we have:

q2 = (250 N) * (0.15 m)^2 / (9 x 10^9 N m^2 / C^2 * 6.5 x 10^-5 C)

Simplifying:

q2 = 8.65 x 10^5 C

Therefore, the magnitude of the other charge is 8.65 x 10^5 C.

The kinetic energy of the positron produced by a 2.80 MeV photon is also 2.80 MeV, as all the energy of the photon is converted into the kinetic energy of the resulting particles.

When a photon interacts with matter, it can undergo a process called pair production, where an electron and a positron are created. In this case, a 2.80 MeV photon is producing an electron-positron pair.

According to the law of conservation of energy, the total energy before and after the interaction must remain the same. Since the initial energy is in the form of a photon, which has no mass, all of its energy is converted into the kinetic energy of the electron and positron.

Therefore, the kinetic energy of the positron will be equal to the initial energy of the photon, which is 2.80 MeV.

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Answer: the answer is b “The warmer a region of the atmosphere is, the more infared radiation it emits”

Explanation:

Answer:

a

Explanation:

i got it right

Answer:

Before starting the simulation and having the waves encounter the barrier, the wavelength is manipulated. This is the independent variable. The pattern of diffraction will vary as a result of the change in wavelength. The diffraction angle is therefore the dependent variable. A “constant” is a parameter that stays the same regardless of the variables. The parameter of the barrier that is held constant is the size.

Answer:

E' = Qa/4πε[√(a² + z²)]³

Explanation:

Since the non-conducting plate is symmetric, a small charge element dq generates an electric field dE at a distance R from itself and a distance z above the center of the plate. Since the plate is symmetric, we only have the vertical component of the electric field acting at the center so dE' = dEcosθ where θ is the angle between R and the plate.

So, dE' = dEcosθ = dqcosθ/4πεR²

Let σ represent the surface charge density of the plate. So, for a small elemental area dA, dq = σdA.

Substituting this into dE' we have

dE' = σdAcosθ/4πεR²

Also cosθ = a/R where a is half the length of side of the plate of side length, 2a.

So, dE' = σdAa/4πεR³

Also R² = a² + z²

R = √(a² + z²)

So,  dE' = σdAa/4πε[√(a² + z²)]³

Now, dA = dxdy

dE' = σadxdy/4πε[√(a² + z²)]³

So, the total electric field at z is obtain by integrating dE'

E' = ∫dE' = ∫σadxdy/4πε[√(a² + z²)]³ = σa∫dxdy/4πε[√(a² + z²)]³

We integrate dx and dy from -a to a.

So,

E' = σa[2a][2a]/4πε[√(a² + z²)]³

E' = σa³/πε[√(a² + z²)]³

Since the total chare Q = σA where A is the are of the plate. A = (2a)² = 4a²

Q = σA = 4σa²

σ = Q/4a²

substituting σ into E', we have

E' = (Q/4a²)a³/πε[√(a² + z²)]³

E' = Qa/4πε[√(a² + z²)]³

The electric field inside the non-conductor sphere would be different. For a non-conductor sphere, the charge is distributed uniformly throughout the sphere, rather than being concentrated on the surface as in a conductor.

The electric field outside a uniformly charged solid sphere (conductor or non-conductor) is given by:

E = kQ/R^2

where k is the Coulomb constant, Q is the total charge on the sphere, and R is the radius of the sphere.

For the given solid metal sphere with a radius of 2.00 m and a total charge of -4.20 μC, we have:

E = (9.0 × 10^9 N·m^2/C^2) × (-4.20 × 10^-6 C) / (2.00 m)^2

E ≈ -9.86 N/C

The electric field is negative, which indicates that the direction of the electric field is inward, toward the center of the sphere.

For a solid non-conductor sphere that is uniformly charged throughout, the electric field outside the sphere can still be calculated using the same formula. The total charge Q on the sphere and the radius R of the sphere would be the same as for the metal sphere. Therefore, the magnitude of the electric field outside the solid non-conductor sphere would be the same as for the metal sphere:

E = kQ/R^2

E = (9.0 × 10^9 N·m^2/C^2) × (-4.20 × 10^-6 C) / (2.00 m)^2

E ≈ -9.86 N/C

However, the electric field inside the non-conductor sphere would be different. For a non-conductor sphere, the charge is distributed uniformly throughout the sphere, rather than being concentrated on the surface as in a conductor. Therefore, the electric field inside the non-conductor sphere would be zero. This is because the electric field due to one element of charge is cancelled by the electric field due to an opposite element of charge located on the opposite side of the sphere.
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112.5 kJ is used when  a 75 watt light bulb used for 25m.

Energy  is a quantitative property given to a body or physical system, identifiable in the performance of work or in the form of heat and light. Standard mechanical size. Energy is Conserved - The law of conservation of energy states that energy can be transformed into form, but cannot be created or destroyed. The unit of measure for energy in the International System of Units (SI) is the joule (J). Common forms of energy include the kinetic energy of moving bodies, the potential energy stored in bodies (due to their position in the field, etc.), the elastic energy stored in fixed bodies, the chemical energy associated with chemical reactions, Radiant energy carried by electromagnetic radiation and internal energy contained in thermodynamic systems. All living things absorb and emit energy all the time.

Energy = Power x Time

  Time = 25 minutes

            = 25 x 60 sec = 1500 sec

Power = 75 watt

Energy = 75 x 1500

               112,500 Joules

Energy in KJ = 112,500/1000

                    = 112.5 KJ

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Answer:

good

Explanation:

Answer:

fine

Explanation:

make me as brainliast

Answer:

Answer is -2.

Explanation:

I hope it's helpful!

Answer:

neg 2

Explanation:

Pyroclastic flows can exceed speeds of several hundred kilometers per hour, with some exceptional cases exceeding 700 kilometers per hour.

Pyroclastic flows are fast-moving currents of hot gas, ash, and volcanic rock that are expelled during volcanic eruptions. These flows can travel at extremely high speeds, making them one of the most dangerous aspects of volcanic activity.

Pyroclastic flows can reach speeds of several hundred kilometers per hour, with some exceptional cases exceeding 700 kilometers per hour. The speed of a pyroclastic flow depends on various factors, including the volume of material being ejected, the steepness of the slope, and the density of the flow.

The high speeds of pyroclastic flows make them highly destructive, capable of leveling everything in their path and causing widespread devastation.

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Pyroclastic flows can exceed speeds of 700 kilometers per hour.

Pyroclastic flows are a combination of ash, gas, and lava fragments that are expelled from a volcano's vent during a violent eruption.

These flows are considered to be one of the most deadly volcanic hazards, as they move very quickly and are incredibly hot.

Pyroclastic flows can travel at speeds of up to 700 kilometers per hour (430 miles per hour), which is much faster than most vehicles can travel.

These flows are capable of destroying entire towns and causing widespread damage, making them one of the most dangerous volcanic hazards.

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Answer:

The final solution is 38 g.

Explanation:

(2.4 (g / mL)) x 15.82 mL

= 37.96800 grams

When rounded, we get 38, so 38 g is the final solution.

Answer:

38 g is the answer