in what way is an object moving in a circle always accelerating

First, let

f = mag. of static friction

n = mag. of normal force

w = m g = mag. of gravitational force (the weight of the block)

m = mass of the block

g = 9.80 m/s² (the mag. of the acceleration due to gravity)

a = acceleration of the block

It's the static friction that interests us at the moment "when it begins to slide", meaning the precise moment at which static friction is at its maximum. At that point, the friction has magnitude f such that

f = 0.5 n

The problem is much easier to work through if you split up the forces into components acting parallel and perpendicular to the ramp. By Newton's second law, we have

• the net force acting parallel to the ramp is

∑ F = - f + w sin(30°) = m a

• and the net force acting perpendicular to the ramp is

∑ F = n - w cos(30°) = 0

Hence the net force on the block as it begins to slide acts only in the parallel direction. Note that we take the positive parallel direction to be the one in which the block slides down the ramp (i.e. opposing the friction force), and the positive perpendicular direction to be the same as the normal force.

Solve the second equation for n :

n = m g cos(30°) = (100 kg) (9.80 m/s²) cos(30°) ≈ 849 N

Then

f = 0.5 (849 N) ≈ 424 N

and so the net force on the block is

∑ F ≈ - 424 N + (100 kg) (9.80 m/s²) sin(30°) ≈ 65.6 N

Next, you want to find the acceleration of the block as it is sliding down the ramp, during which time kinetic friction kicks in. We have the same equations as above, except now f = 0.3 n. So we still have n ≈ 849 N, which gives

f = 0.3 (849 N) ≈ 255 N

∑ F = - f + w sin(30°) = m a

→   - 255 N + (100 kg) (9.80 m/s²) sin(30°) ≈ (100 kg) a

→   a ≈ 2.35 m/s²

¿Cuál es la diferencia entre ciencia y tecnología?

La ciencia se refiere al proceso de explorar nuevos conocimientos metódicamente a través de la observación y los experimentos.

La tecnología se refiere al proceso de aplicar el conocimiento científico en aplicaciones prácticas para varios propósitos.

What is the difference between science and technology?

Science refers to the process of exploring new knowledge methodically through observation and experiments.

Technology refers to the process of applying scientific knowledge in practical applications for various purposes.

To determine the mass of granite, we must first understand the definition of density. Density is defined as the amount of matter present in a substance per unit volume.

We use the formula: density = mass/volume to calculate the mass of a substance given its density and volume. To calculate the mass of 54.3 m³ of granite, we use the following steps:

Given Density of granite = 2700 kg/m³Given volume of granite = 54.3 m³Let us substitute the values in the formula of density:density = mass/volume Solving for mass, we get:mass = density × volume Substitute the given values of density and volume into the formula:mass = 2700 kg/m³ × 54.3 m³

The m³ unit in the volume cancels out, leaving us with kg as the unit for mass.

We then solve the equation to get the mass:mass = 146,610 kg

Therefore, the mass of 54.3 m³ of granite is 146,610 kg.

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Overcurrent refers to a sudden and rapid increase in current over a short period of time (also known as a short circuit or ground fault) (fractions of a second).

Fuse or circuit breakers are used to safeguard equipment and circuits from overcurrent conditions.

The current value is much higher than the nominal line current and can range from six times to hundreds of times higher than the typical rated current value.

Thermal energy: High current levels generate a lot of heat, which can harm cables and equipment. I2t (current squared times time) can be used to express thermal energy;

Mechanical forces: Busbars and other equipment may become warped or experience other issues due to the high-fault currents' ability to produce strong magnetic fields.

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Pitch refers to how high or low a sound seems to a person. It is the degree of highness or lowness of a sound, which is determined by the frequency of a sound wave.

Pitch is a sound's quality that enables us to discern between a low and a high sound. It is the degree of highness or lowness of a sound and is determined by the frequency of a sound wave. A high-pitched sound is a sound that has a high frequency. A low-pitched sound, on the other hand, is a sound that has a low frequency. Sound pitch is an important aspect of music and voice tone.Pitch can be described as the rate of vibration of sound waves, measured in Hertz (Hz), with higher frequencies indicating a higher pitch. The pitch of a sound can be altered by changing the frequency of the sound wave. Pitch and volume are two of the most important qualities of sound that are utilized in music and speech to express various emotions and convey meaning.The pitch of a sound is generally increased by increasing the frequency and decreased by decreasing the frequency. The pitch of a sound can also be affected by other factors, such as the size, shape, and material of the object producing the sound. For instance, a guitar string that is tight will create a high-pitched sound, while a loose guitar string will create a low-pitched sound. Similarly, a small bell will produce a high-pitched sound, while a large bell will produce a low-pitched sound.

Pitch is the degree of highness or lowness of a sound and is determined by the frequency of a sound wave. A high-pitched sound is a sound that has a high frequency. A low-pitched sound, on the other hand, is a sound that has a low frequency. Pitch can be described as the rate of vibration of sound waves, measured in Hertz (Hz), with higher frequencies indicating a higher pitch. The pitch of a sound can be changed by adjusting the frequency of the sound wave.

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Impulse commutation circuits are commonly used in power electronic systems for rapid switching operations.  In this case, we'll design a circuit that has a discharging time of 10μs, an initial capacitor voltage of 5V, and a load current given by 2+ (ID / 14) A.

Here's a schematic diagram of the impulse commutation circuit:

Copy code

   +-----------------+

   |                 |

   |                 |

 -----   +----+      |

 -----  |     |      |

   |    |  C  |      |

   |    |     |      |

   |    +----+      |

   |       |        |

   |       |        |

  ---     ---      ---

  ---     ---      ---

   |       |        |

   |       |        |

  V0      SW      Load

C: Capacitor with an initial voltage of 5V.

SW: Switch that controls the discharge of the capacitor.

Load: Represents the constant load current, which is given by 2+ (ID / 14) A.

To implement the impulse commutation circuit, follow these steps :Connect one terminal of the capacitor to the positive terminal of the power supply.  Connect the other terminal of the capacitor to one terminal of the switch (SW). Connect the other terminal of the switch (SW) to the load.

Connect the other terminal of the load to the negative terminal of the power supply. The load current equation provided, 2+ (ID / 14) A, suggests that the load current varies based on some external factor, represented by ID.

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Answer:

Second option) 2 s

Explanation:

m/s = meters per second, so the bullet travels 800 meters in 2 seconds

-> 1,600 meters per second / 800 meters per second = 2

So it will take 2 seconds

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Answer:

\(\huge\boxed{\sf t = 2\ seconds}\)

Explanation:

Given Data:

Speed = v = 800 m/s

Distance = S = 1600 m

Required:

Time = t = ?

Formula:

t = S / v

Solution:

Put the given data in the above formula:

t = 1600 / 800

t = 2 seconds

\(\rule[225]{225}{2}\)

Hope this helped!

The height of the ceiling at the center of the whispering gallery is approximately 43.3 feet.

In an ellipse, the sum of the distances from any point on the ellipse to its two foci is constant. In this case, the two foci are located 25 feet from the center of the hall.

Given that the hall is 100 feet in length, the distance from one end to the center is 50 feet. We can consider this as the semi-major axis (a) of the ellipse.

The sum of the distances from any point on the ellipse to its two foci is equal to 2a. Thus, the sum of the distances from the ceiling at the center of the hall to the two foci is also 2a.

Since the foci are located 25 feet from the center, the sum of the distances is 2a = 50 feet.

To find the height of the ceiling at the center, we need to determine the semi-minor axis (b) of the ellipse. The semi-minor axis can be calculated using the formula:

b = √(a² - c²)

where c represents the distance from the center to each focus. In this case, c = 25 feet.

Substituting the values into the formula:

b = √(50² - 25²)

b = √(2500 - 625)

b = √(1875)

b = 43.3 feet

Therefore, the height of the ceiling at the center of the whispering gallery is approximately 43.3 feet.

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Answer:

Finance costs (also known as interest fees) aren't added to your account in a set amount like other fees.

OR

A credit card is a payment card that is issued to users to allow them to pay a merchant for products and services depending on their outstanding debt. The card issuer opens a revolving account for the cardholder and provides a line of credit from which the cardholder can borrow money to pay a merchant or get a cash advance. Consumer credit cards and business credit cards are the two types of credit cards available. The majority of the cards are plastic, however, there are a few metals and gemstone-encrusted metal cards.

Explanation:

Answer:

4.7m

Explanation:

Given parameters:

Mass of the book  = 1kg

Gravitational potential energy  = 46J

Unknown:

Height of the shelf  = ?

Solution:

The potential energy is due to the position of a body above the ground.

        Gravitational potential energy  = mgh

m is the mass,

g is the acceleration due gravity  = 9.8m/s²

h is the height which is unknown

                       46  = 1 x 9.8 x h

                       h  = 4.7m

Answer:

gburhgjn

Explanation:

hrbvufv

Answer:

Im pretty sure its c

Explanation:

Answer:

2) find the power rating of the given transformer:

the transformer is rated at 250v,50hz, and it is used with a circuit which

consists of a 200v,50hz d.c. source and a rheostat.the rheostat is used to control the current in the primary of the transformer.the maximum readable current in the primary of the transformer is 250mA.the transformer is wired as an autotransformer with the primary winding of 250 turns and the secondary winding of 250 turns.the current in the secondary winding of the transformer is to be kept at 10mA when the load current in the rheostat is 10mA.

3) a single phase a.c. supply of 230v,50hz is connected across a series combination of a capacitor and a resistor in parallel with a pure inductor.the resistor and inductor are connected in series with each other.the impedance of the inductor is 100 ohms and the impedance of the capacitor is 60 ohms.the supply current is 10A.

a) find the impedance of the capacitor if the power factor of the circuit is 0.8 lagging.

b

Explanation:

Answer:

Explanation:

Given:

R₁ = 22 Ω

R₂ = 4.5 Ω

U = 45  V

_________

I - ?

P₁ - ?

P₂ - ?

P - ?

Circuit resistance:

R = R₁ + R₂ = 22 + 4.5 = 26.5 Ω

Circuit current:

I = I₁ = I₂ = U / R = 45 / 26.5 ≈ 1.7 А

Lamp voltages:

U₁ = I₁·R₁ = 1.7·22 ≈ 37.40 V

U₂ = I₂·R₂ = 1.7·4.5 ≈ 7.65 V

Power:

P₁ = U₁·I₁ = 37.40·1.7 ≈ 63.6 W

P₂ = U₂·I₂ = 7.65·1.7 ≈ 13.0 W

P = U·I = 45·1.7 ≈ 76.5  W

Answer:

-0.5 m/s2 as it comes to rest.

Explanation:

Answer:

The person needs to apply 25 N to balance the seesaw

Explanation:

Moment

The moment of a force is a measure of its tendency to cause a body to rotate about a specific point or axis.

The moment M of a force F located at a distance x from the axis of rotation is calculated as follows:

M = F.x

The image shows a moment of M=100 N.m is needed to be applied to balance the seesaw. It can also be noted that the distance to the pivot is x=4 m

To calculate the force needed to balance the seesaw, we solve for F:

\(\displaystyle F=\frac{M}{x}\)

\(\displaystyle F=\frac{100\ N.m}{4\ m}\)

F = 25 N

The person needs to apply 25 N to balance the seesaw

frequency = velocity divided by wavelength

Ultraviolet (UV) radiation lies between wavelengths of about 400 nanometres and 10 nanometres, corresponding to frequencies of 7.5 × 1014 Hz to 3 × 1016 Hz.

The rope will Clancy have to pull to lift the air conditioner is 170m option (a) is correct.

We are given that,

F₁ = 1400 N

D₁ = 9.1 m

η = 68%;    η = 0.68

F₂ = 110 N

D₂ = ?

If the pulley system is perfectly functional then we can write as,

D₂'  = F₁·D₁  / F₂ = 1400·9.1 / 110 ≈ 115.8 m

If the code for the pulley system is 68% such as,

D₂ = D₂' / η = 115.8 / 0.68 ≈ 170 m

Option (a) is the correct answer since Clancy will need to pull a 170m rope to lift the air conditioner.

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According to the vector study, the upward direction is taken as positive, and the downward direction is taken as negative.

in the same manner, the rightward direction is taken as positive span the leftward direction is taken as negative.

As the object is hot vertically upwards so now the direction of velocity is taken as positive as given in the question.

(Because it is direction is in the direction of the center of the Earth). until the object reaches its maximum height where the speed is zero and then it begins to fall until it hits the ground.

At the maximum height, the velocity is zero.

The acceleration acting on the object is acceleration due to gravity which is always acting downwards so it is taken as negative.

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Momentum is never created or destroyed. It is conserved.

The cue stick gave the cue ball all the momentum there is on the table.  There's nothing on the table that can pour in any more momentum.

After the strike, with 15 or 16 balls rolling every which way around the table, the total momentum of all of them combined will be the same as the cue ball's momentum right now, before the strike.

a. The amount of thermal energy 'wasted' by the turbine per second = 500,000 J

b. Efficiency of the turbine = 66.7%

Energy is the ability to do work.

Energy is essential to sustain the material universe. Energy constantly flows in the universe and is transformed into various forms.

Th various forms of energy are:

When energy is lost in a system, it is usually converted to heat.

a. The amount of thermal energy 'wasted' by the turbine per second = 1,500,000 J - 1,000,000 = 500,000 J

b. Efficiency = (1,000,000/1,500,000) * 100%

Efficiency of the turbine = 66.7%

In conclusion, energy is usually lost in the form of heat or thermal energy during energy transformations.

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Answer:

blue

Explanation: because blue takes more then way from red

for red                 for blue

x=120 km            130 km

v=120km/h          130 km/h

t=1h                       1h

Option 2 is the correct answer. The Roche limit is reached when ring particles closest to a planet fall into its atmosphere.

The Roche limit is the minimum distance at which a celestial body, such as a moon or a ring system, can approach a planet before being disrupted by tidal forces. When a celestial body gets too close to a planet, the planet's tidal forces can overcome its gravitational pull, and the body may be torn apart by these forces.

Option 2 is the correct answer. The Roche limit is reached when ring particles closest to a planet fall into its atmosphere. This happens because the tidal forces from the planet become stronger than the gravitational forces holding the particles together, causing them to break apart and fall towards the planet. Once the particles are within the Roche limit, they will continue to break apart and eventually form a disk or ring around the planet.

The Roche limit is an important concept in planetary science, as it helps us understand the structure and behavior of planets, moons, and other celestial bodies. It can also help us explain the formation of planetary rings, such as those around Saturn and other gas giants in our solar system.

So, the right response is Choice 2. When ring particles closest to a planet enter its atmosphere, the Roche limit is achieved.

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The time period of simple pendulum is 2xpi x (l/g)^1/2  when derived by dimensional method.

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Answer:

Its A :)

Explanation:

Answer:

A or

(Diagnostic)

Explanation: i just did it on Edge

The rotational kinetic energy of the armadillo has increased by 25 joules.

This is because the armadillo is rolling down the hill, which means that it is rotating around its center of mass. As it rolls, it is converting its gravitational potential energy into translational and rotational kinetic energy.

Since the gravitational potential energy has decreased by 40 joules and the translational kinetic energy has increased by 15 joules, the remaining 25 joules must have been converted into rotational kinetic energy. This means that the armadillo's rotational kinetic energy has increased by 25 joules.

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Answer:

Yes

Explanation:

A parallel circuit has two or more paths for current to flow through. Voltage is the same across each component of the parallel circuit. The sum of the currents through each path is equal to the total current that flows from the source.

Answer:

monochromator

Explanation:

Answer: Substance 3 is liquid at room temperature

Explanation: The common room temperature is assumed to be 20-22°C, we need to find the substance that will be in liquid state in that temperature.

For Substance 1, the boiling point is -195.975°C, and hence at room temperature, it would be in vapor phase and all liquid would have turned to gas.

For Substance 2, the boiling point is 3.85°C, and hence at room temperature, it would be in vapor phase and all liquid would have turned to gas in this case too.

For Substance 3, the boiling point is 77.85°C, and melting point is -108.15°C, hence at room temperature, it would be in liquid state.

For Substance 4, the melting point itself is 1800°C, due to which at room temperature it would be in solid state.