Some materials have electrons that are tightly bound to the nucleus and are not free to travel within the substance. These materials are called .............
A. conductors
B. insulators
C. semiconductors
D. none of these

At the summit, the ring pushes the rider with a force of 801N.

Centripetal force and force equilibrium are ideas needed to address the challenges.

Calculate the rider's velocity by first multiplying the period by the round-up wheel's complete circumference. The centripetal force acting on the rider may then be calculated using the velocity. The normal force may then be calculated using the force equilibrium.

The radius of a circle is,           r=\(\frac{d}{2}\)

Here,

d is the diameter of the circle

The circumference of a circle is,  C= 2πr

The speed is the total distance covered in a given time. The speed is,

v=\(\frac{x}{t}\)

here,

x is the distance covered and t is the time taken

The centripetal force acting on a body moving in a circular path is,

\(F_{c}\)=\(\frac{mv^{2} }{r}\)

Here,

m is the mass of the body.

The weight of a body is, W=mg

g is the acceleration due to gravity.

step: 1

Part A

The radius of the wheel is, r=\(\frac{d}{2}\)

Here, d is the diameter of the wheel

d=16.0m

r=16/2

r=8m

The circumference of the wheel is, c=2*(3.14rad)*(8m)

                                                           c= 50.3m

The speed of rider is,   v=\(\frac{C}{T}\)

                                      v=50.3/3.60

                                      v= 14.0m/s

The centripetal force acting on the rider is,   \(F_{c}\)=\(\frac{mv^{2} }{r}\)

                                                          \(F_{c}\)=55 * 14/8

                                                         \(F_{c}\)=1.35*10³

The weight of the rider is,            W=mg

                                                       W=55*9.81

                                                       W=5.40*10²N

The force equilibrium at the top of the wheel is,

-F -W = - \(F_{c}\)

F is the force that the ring pushes the rider.

Rewrite the equation in terms of the force that the ring pushes on the rider at the top. The force is,            F= \(F_{c}\)-W

                                                           F=(1.35*10³N)-(5.40*10²N)

                                                            F=801N

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Answer:

Probably late but the change in motion of the man is in his speed, I know because every 0.2 seconds, he was gaining more distance as he was the previous 0.2 seconds. His acceleration positive because he was speeding up.

Explanation:

Hope it Helps!

( I realized he started off speeding up but then started slowning down so I am confused if you get this wrong Im so sorry.)

Acceleration is defined as the rate of change of the velocity of the body. The acceleration of the man is positive due to its increased velocity.

Acceleration is defined as the rate of change of the velocity of the body. Its unit is m/sec².It is a vector quantity. It requires both magnitudes as well as direction to define.

The acceleration of the man is positive because acceleration is the rate of change of velocity and the velocity of the person is increasing at an equal interval of time showing that the acceleration is increasing and positive in nature.

Hence due to successive velocity, the acceleration of the man is positive.

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This question involves the concepts of Newton's Second Law of Motion and Momentum.

The magnitude of the force from the water onto the surface is "408".

According to

\(F=\frac{\Delta P}{t}\)

where,

Therefore,

\(F=\frac{\Delta P}{t}=\frac{m(v_f-v_i)}{t}\\\\F=\frac{(17\ kg)(0\ m/s-24\ m/s)}{1\ s}\\\\F=-408 N\)

The negative sign shows reaction force.

F = 408

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Answer:

Fluid theories of electricity are outdated theories that postulated one or more electrical fluids which were thought to be responsible for many electrical phenomena in the history of electromagnetism.

I hope it's helpful!

Answer:

to help keep fresh air

Explanation:

The speed of the planet at aphelion cannot be directly calculated given the perihelion distance, aphelion distance, and speed at perihelion of a planet.

The perihelion distance is the closest distance between the planet and the star (sun), while the aphelion distance is the farthest distance. The speed at perihelion is the maximum speed of the planet during its orbit. With this information, we can determine various aspects of the planet's orbit.A.

The mass of the star: The masses of the star and the planet are unrelated to the given parameters, so the mass of the star cannot be calculated with this information.B. The mass of the planet: Similarly, the mass of the planet is not related to the given parameters, so it cannot be directly calculated.

C. The speed of the planet at aphelion: The speed of the planet at aphelion depends on the gravitational force exerted by the star, which is related to both the mass of the star and the distance between the planet and the star at aphelion. Since the mass of the star is not provided, the speed at aphelion cannot be determined.D.

The period of the orbit: The period of the orbit depends on the semi major axis of the orbit and the mass of the star. Since the semi major axis is not directly provided, the period of the orbit cannot be calculated.E. The semi major axis of the orbit: The semi major axis can be determined using the perihelion and aphelion distances, so it can be calculated with the given information.

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Answer:

0.0778 hm

Explanation:

Dm is one below the base (m) so divide by 10 to get to m. Then divide by 10 for each step up the ladder. You go up 2 steps to hm, so divide the m number by 100. That's your final answer.

Answer:

Explanation:

3.011 x 10^24 atoms

Answer:

jskskskssksksksskssksksksksks

The downtown is 5 miles far away, if the car travels at 10 miles / hour for 0.5 hours.

v = d / t

v = Velocity

d = Distance

t = Time

v = 10 mi / hr

t = 0.5 hr

d = v * t

d = 10 * 0.5

d = 5 mi

Velocity of the car is the rate of change of position of the car. In simple words it can be said as velocity is used to calculate the distance covered in a given amount of time.

Therefore, the downtown is 5 miles far.

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Answer:

(1) 1500 J (2) 273.7 W

Explanation:

Given that,

The mass of a boulder, m = 25 kg

Distance moved by the force, d = 30 m

Applied force, F = 150 N

As a leftward force of friction that is two thirds the magnitude of the force, f = 100

Net force = 50 N

(1) Work done by the force is equal to the product of force and displacement i.e.

W = Fd

Put all the values,

W = 50 × 30

W = 1500 J

(2) It takes the boulder 5.48 seconds to travel 30 meters.

Power, P = W/t

So,

\(P=\dfrac{1500}{5.48}\\\\P=273.7\ W\)

When you walk, you are more likely to be able to walk at a constant velocity. Your walking speed varies as you walk in real-life scenarios, but you aim to maintain a steady pace or velocity. This is how you can keep track of time and distance traveled.

When you walk at a constant velocity, you move forward with a steady speed and direction. The velocity is defined as the rate at which an object's position changes with respect to time. When you walk, you typically aim to move forward with a constant velocity, which is the speed at which you walk and the direction you walk. In certain situations, a constant velocity is ideal, such as when you are traveling long distances and want to arrive at your destination at a certain time. To ensure that you walk at a constant velocity, you need to maintain a steady pace by keeping your stride consistent and avoiding unnecessary stops or changes in direction. Walking with a constant velocity involves maintaining a steady speed and direction. It is possible to achieve this by maintaining a constant pace, keeping your stride consistent, and avoiding any unnecessary stops or changes in direction.

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The two essential premises for the special theory of relativity are 1. The laws of nature are identical for everyone. 2. The speed of light is the same for everyone. So option a. is the correct answer.

General Relativity is physicist Albert Einstein's interpretation of how gravity impacts the fabric of space-time. The theory, that Einstein publicized in 1915, extended the theory of special relativity that he had published 10 years earlier. Special relativity contended that space and time are indistinguishably affiliated, but that theory didn't concede the existence of gravity. Einstein spent the decade between the two publications discerning that especially massive objects wrap the fabric of spacetime, a distortion that manifests as gravity.

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Answer:

drinking enough fluids, wearing proper clothing and timing your workout to avoid extreme heat

Answer:

This is known as a Waxing Crescent Moon. This Moon can be seen after the New Moon, but before the First Quarter Moon. The crescent will grow larger and larger every day, until the Moon looks like the First Quarter Moon.

To double the gravitational force between the two blocks, double the mass of the blocks and keep the distance between constant.

The given parameters;

The gravitational force between the two mass is calculated by applying Newton's law of universal gravitation as follows;

\(F = \frac{Gm_1 m_2}{r^2}\)

The magnitude of the gravitational force increases with increase in the mass of the blocks and decreases with increase in the distance between the blocks.

To double the gravitational force between the blocks, double the mass of the blocks;

\(F = \frac{G(2m_1)(2m_2)}{r^2} \\\\F = 2 \times \frac{Gm_1 m_2}{r^2}\)

Thus, to double the gravitational force between the two blocks, double the mass of the blocks and keep the distance between constant.

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Answer:

In terms of both price and availability, the Birkin bag is as elusive as it is exclusive. For more than two decades, the bag has been the most sought item in the handbag industry. For such a modest bag, that's a lot of staying power (in looks alone, the design itself takes some 18 hours and is done by a single craftsman).

Of course, it's likely that the bag's rarity is what keeps it at the top of every want list. It is difficult, for example, to stroll into a Hermès store and buy a bag –– even if you could afford to pay the minimum price of $10,000. No, you have to be on an elite list to receive a Birkin.

Explanation:

There are alot more things like the Birkin Bag that use the same marketing skills and it works for alot of companies.

Answer:   True

Explanation:

When drawing a vector, you should represent the magnitude of the vector by the length of the arrow is true.

What are vectors?
The term "vector" in mathematics and physics is used informally to refer to some values that cannot be stated by a single integer (a scalar) or to certain members of vector spaces. In the past, vectors were first used to represent quantities with both a magnitude and a direction, such as displacements, forces, and velocity, in geometry and physics (usually in mechanics). Similar to how distances, masses, and time are represented by real numbers, these quantities are represented by geometric vectors.

In some circumstances, tuples—finite sequences of numbers with a definite length—are sometimes referred to as vectors.

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0.8604651 Volts are present between the metal mast and the plastic tube. An electrical or electronic circuit's voltage, measured in volts, is the difference in electrical potential between two points.

Explanation:

Voltage = energy/charge

              = 3.7/4.3

               = 0.8604651.

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Answer:

Upward

Explanation:

When the book is sitting still, the gravity will be pulling the book down and friction will be on the book and the friction is upwards.

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The pail’s minimum speed at the top of the vertical circle is 4.72 m/s.

The given parameters:

The net force on the pail of water at the top of the vertical circle is calculated as follows;

\(T = ma - mg\\\\T = \frac{mv^2}{r} - mg\\\\T + mg = \frac{mv^2}{r} \\\\mv^2 = r(T + mg)\\\\v^2 = \frac{r(T + mg)}{m} \\\\v= \sqrt{\frac{r(T + mg)}{m}} \\\\v = \sqrt{\frac{1 (25\ + \ 2 \times 9.8)}{2}} \\\\v = 4.72 \ m/s\)

Thus, the pail’s minimum speed at the top of the vertical circle is 4.72 m/s.

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The pail’s minimum speed at the top of the circle if no water is to spill out is; v = 4.722 m/s

We are given;

Mass of the pail of water; m = 2000 g = 2kg

Radius of the circle; r = 1 m

Tension exerted by string; T = 25 N

To calculate the net force on the pail of water at the top of the vertical circle, let us take equilibrium of forces to give;

W - T = ma

Where;

W is weight = mg

T is tension on the string

Now, in circular motion, we know that;

Acceleration is; a = v²/r

Thus;

mg - T = m(v²/r)

Making v the subject of the formula gives us;

v = √[(r(T + mg)/m)

Plugging in the relevant values gives;

v = √[(1(25 + (2 * 9.8))/2)

v = 4.722 m/s

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Answer:\

the atomic number of boron (B) is 5.

Atomic number is the number of protons, which is characteristic of a chemical element. Atomic number increases from left to right in Periodic table.

Boron is an element with atomic number 5, which means it has 5 protons and 5 electrons, boron atom has neutral charge.

Electron configuration of boron: ₅B: 1s² 2s² 2p¹, it has three valence electrons in 2s and 2p orbitals.

Explanation:

there you go have a good day

Answer:

a

Explanation:

the river over time will eroded the rock

Answer:

5.25 Hz

Explanation:

The formula for calculating the frequency of a wave is:

frequency = velocity/wavelength

Substituting the given values, we get:

frequency = 63 m/s / 12 m

Simplifying this expression, we get:

frequency = 5.25 Hz

The frequency of the wave is 5.25 Hz

True. Various heat-related disorders can be brought on by inadequate hydration combined with exposure to extreme heat and humidity.

One of three disorders brought on by excessive heat, with heat cramps being the least dangerous and heatstroke being the most serious, is heat exhaustion. High temperatures, particularly when there is also a high humidity level, and intensive physical activity are the main causes of heat illness.

According to T8 CCR Section 3395, "Heat Illness" refers to a dangerous medical illness caused by the body's incapacity to handle a specific amount of heat. Examples of this ailment include heat cramps, heat exhaustion, heat syncope, and heat stroke.

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Organisms make different proteins because of the gene recombination and genetics.

Siblings may inherit various features from their parents and from each other depending on the specific gene combinations that each seeds carries. The variance in silk inflexibility among spider seed is explained by random gene recombination.

The inflexibility of silk is another issue. This point is shared by all of Darwin's dinghy spiders (they all have spider silk with some flexibility), yet some spiders create silk that is more flexible than other spiders' silk. There are three levels of silk inflexibility - high, medium, and low.

The above explanation about the genetic recombination tells about why the organisms make different proteins.

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If you find yourself being hit by infrared rays, you are experiencing exposure to infrared radiation.

Infrared radiation refers to the electromagnetic waves with longer wavelengths than those of visible light. These rays are not visible to the human eye but can be detected by specialized devices or sensors. When you feel the sensation of being hit or exposed to infrared rays, it means that your body is absorbing this form of radiation.

Infrared radiation is commonly emitted by warm objects, such as the sun, fire, or heated surfaces. It is important to note that excessive or prolonged exposure to intense infrared radiation can have detrimental effects on human health, including thermal burns and tissue damage. Therefore, it is advisable to take appropriate precautions and limit exposure to high-intensity infrared sources.

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The space shuttle must be moving at approximately 5.46 × 10^6 m/s (relative to Earth) when it releases the satellite into a circular orbit 695 km above the Earth.

To determine the speed at which the space shuttle must be moving relative to Earth when it releases a satellite into a circular orbit 695 km above the Earth's surface, we can use the principles of orbital mechanics.

The speed required for an object to maintain a circular orbit around the Earth can be found using the following formula:

v = √(GM/r)

Where:

v is the orbital velocity,

G is the gravitational constant (approximately 6.674 × 10^-11 m^3/kg/s^2),

M is the mass of the Earth (approximately 5.972 × 10^24 kg), and

r is the distance between the center of the Earth and the satellite's orbit.

In this case, the distance from the Earth's center to the satellite's orbit is the sum of the Earth's radius (approximately 6,371 km) and the altitude of the satellite (695 km). So, the total distance (r) is:

r = Earth's radius + altitude

= 6,371 km + 695 km

= 7,066 km

Converting this distance to meters:

r = 7,066 km × 1,000 m/km

= 7,066,000 m

Now we can substitute the values into the orbital velocity formula:

v = √((6.674 × 10^-11 m^3/kg/s^2) × (5.972 × 10^24 kg) / (7,066,000 m))

Simplifying the equation:

v = √(2.98 × 10^14 m^2/s^2)

Calculating the square root:

v ≈ 5.46 × 10^6 m/s

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You are in a spaceship that is accelerating with g far from any gravitational field, doing ten pushups in this spaces ship would require more effort than it would take on earth.

In the absence of a gravitational field, the weight of the individual performing the pushups is zero. In the absence of a gravitational field, a person's weight is zero. This means that the person would have to push their bodyweight, as well as any additional weight or resistance, using only their own force, which would require more effort than it would on Earth where gravity provides resistance.

The amount of effort required would be determined by the mass of the individual and the force required to overcome the weightlessness, which would be greater than the force required on Earth due to the presence of gravity. Thus, doing ten pushups in a spaceship that is accelerating with g far from any gravitational field would require more effort than it would take on earth.

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The approximate value of tc for an ideal bose gas at a density of 125 kg/m3 is 8.3 * 10¹⁹ K

\(P_{c} = \frac{2mkt^{3/2} }{4 pi h^{2} } * (2.612)\frac{\sqrt{pi} }{2}\)

\(125 kg/m^{3} = \frac{2(6.65*10^{-24})(1.38*10^{-23})^{3/2} }{4pi^{2}(1.05*10^{-34}} *(2.612)\ \frac{sqrt{pi}}{2}\)

Tc = 8.3 * 10¹⁹ K

The substance's mass per unit of volume is its density (also known as specific mass or volumetric mass density). The Latin letter D can also be used to represent density, however the most common sign is (the lower case Greek letter rho). Mass divided by volume is the definition of density in mathematics, where  is the density, m is the mass, and V is the volume. Density is sometimes loosely described as weight per unit volume, although this definition is incorrect technically; the term "specific weight" is more appropriate. An example of this is in the US oil and gas business.

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In a series circuit, the current flows through each component in a series, like a line of people waiting to pass through a narrow gate. As there is only one path for the current to flow through, the current must flow through each resistor to complete the circuit.

The total current in the circuit is equal to the current through each resistor. Therefore, the current through each resistor is the same, as they all experience the same "traffic" or resistance in the circuit. An analogy can be made with a hosepipe where the water flows through the hose in a series, and the diameter of the hose remains the same throughout the length.

In a parallel circuit, the current has multiple paths to flow through, like a group of people splitting into different lines at a fork in the road. Each resistor is connected to the same voltage source, and the voltage across each resistor is the same. As a result, the current through each resistor is determined by its resistance. The smaller the resistance of the resistor, the more current it will draw. An analogy can be made with a river splitting into several branches, each branch having its own flow rate and volume. Therefore, the total current in a parallel circuit is the sum of the current through each resistor.

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