the rotation of a potter's wheel is started by applying a force of 20n to the edge of the wheel. the wheel has a radius of 20cm. this causes an angular acceleration of 0.75 rad/s^2.

The velocity of the diver when he is 5 m from hitting the water is 10.7 m/s. We can solve this problem using the conservation of energy.

The Law of Conservation of Energy was discovered in 1842 by Julius Robert Mayer. It is now known as the First Law of Thermodynamics, which states that energy neither creates nor destroys itself.

PE = mgh\

where:

m = mass of the diver = 85 kg

g = acceleration due to gravity = 9.81 m/s^2

h = height of the dive = 12 m

\(PE = (85 kg) *(9.81 m/s^2) * (12 m) = 9997.8 J\)

As the diver falls, the potential energy is converted into kinetic energy given by:

\(KE = (1/2)mv^2\)

When the diver is 5 m from hitting the water, his potential energy has decreased to:

\(PE = (85 kg) * (9.81 m/s^2) * (12 m - 5 m) = 6419.5 J\)

Since the total energy is conserved, we can equate the potential and kinetic energies at this point:

PE = KE

\(6419.5 J = (1/2) * (85 kg) * v^2\)

Solving for v, we get:

\(v = \sqrt(2 * 6419.5 J / 85 kg)\\= 10.7 m/s\)

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Answer:

11.a) Car B  is faster than Car A. This is because Car B covers more distance in less time, whereas Car A covers less distance in more time. Now, as we know that distance is directly proportional and time is inversely proportional to speed. In Car B, a larger distance and less time and a smaller distance and more time in Car A, indicates that the speed of Car B is more than the speed of Car A.

b) Car B accelerates faster than Car A. We know that, the acceleration is directly proportional to the change in linear velocity and inversely proportional to time taken. Here, The overall journey of Car B is short, whereas for Car A, it's longer. Also, as previously mentioned that the final speeds of Car B is more than Car A [remembering that both Cars start from the origin(rest)]. Hence, the change of velocity in Car B is more than Car A. Hence so.

If the measure of arc AB is 130 degrees, the measure of angle APB is half of that since the angle subtended by an arc at the center of a circle is twice the angle subtended at any point on the circumference. Therefore, the measure of angle APB would be 65 degrees.

When dealing with a circle, the measure of an angle formed by two intersecting lines is related to the measure of the arc intercepted by those lines. In this case, the measure of arc AB is given as 130 degrees.

According to the inscribed angle theorem, an inscribed angle is equal to half the measure of its intercepted arc. Therefore, the angle APB, formed by lines AP and BP, will have a measure equal to half of the measure of arc AB.

Since arc AB measures 130 degrees, we can calculate the measure of angle APB by dividing 130 by 2, resulting in 65 degrees. Thus, the measure of angle APB is 65 degrees.

This relationship between arcs and angles is based on the properties and geometry of circles. By understanding these principles, we can determine the measures of angles based on given arc measures and vice versa.

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Answer:

a) 50 rad/s

b) 39.8 rev

Explanation:

Given:

r = 0.36 m

v₀ = 0 m/s

a = 1.8 m/s

t = 10 s

a) Find: ω

v = at + v₀

v = (1.8 m/s) (10 s) + (0 m/s)

v = 18 m/s

ω = (18 m/s) / (0.36 m)

ω = 50 rad/s

b) Find: Δθ

Δx = v₀ t + ½ at²

Δx = (0 m/s) (10 s) + ½ (1.8 m/s) (10 s)²

Δx = 90 m

Δθ = (90 m) / (2π × 0.36 m)

Δθ = 39.8 rev

Answer:

The correct option is;

-Pointing the fan exhaust upward

Explanation:

The fan cart transfers reaction force from the jet of air it blows through the exhaust into motion in the opposite direction of the jet. By pointing the fan exhaust upwards, the direction of motion of the cart is therefore, into the ground. Due to the solid nature of the ground the motion is resisted, and by Newton's first law of motion, a body will remain in motion unless resisted by a force. In the case of the question, the ground is resisting the motion of the cart and the cart will remain at rest and having zero acceleration.

Answer:

See below

Explanation:

Find mass of skydiver

F = mg

969 = m ( 9.81)   so m = 98.8 kg

NET deccel force = 1323-969 = 354 N

F=ma

354 = 98.8 (a)  = 3.58 m/s^2   decceleration

Answer:

Kejlshkdhh4hrbrldbd

And according to newtons second law

Force=Mass×Acceleration

And

\(\\ \sf\longmapsto F\propto a\)

\(\boxed{ \rm \green{ Answer:-}}\)

At equators,the radius of the earth is the greatest at the poles whereas at the equator,it is the least.

Due to this the value of g is greatest at poles and least at the equator of the earth.

Therefore,a body weight more at the poles and less at the equator of the earth.

Automobile battery has more mass than a king-size pillow. Compared to the batteries, the king-size pillow has a larger volume but less mass.

It takes more effort to set an automobile battery in motion. This demonstrates the battery's higher inertia and hence higher mass. Inertia is the ability of a moving object to resist changes in motion. An object's mass affects how much inertia it possesses.

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Answer:

b

Explanation:

it is the only one that has to do with animals

Answer:

The answer is B

Explanation:

The red end of the compass points towards the Earth's magnetic north pole (polarity: "north"), while the white end points towards the Earth's magnetic south pole (polarity: "south").

Based on observations, the polarity of the compass needle can be determined by its response to Earth's magnetic field. The red end of the compass needle is typically marked as the north-seeking end, indicating that it points towards the Earth's magnetic north pole. Conversely, the white end of the compass needle is considered the south-seeking end, indicating that it aligns with the Earth's magnetic south pole.

The Earth has a magnetic field that is generated by the movement of molten iron in its outer core. This magnetic field creates an invisible force that aligns magnetic objects, such as compass needles, with the Earth's magnetic field lines. The Earth's magnetic north pole is located near the geographic North Pole, but it is important to note that the magnetic and geographic poles do not coincide.

When a compass is placed on a level surface, the needle aligns itself parallel to the Earth's magnetic field, with the red end pointing towards the magnetic north pole and the white end pointing towards the magnetic south pole. This alignment allows the compass to be used as a navigational tool, helping determine directions such as north, south, east, and west.

It's worth mentioning that while the red end of the compass is conventionally marked as north, the actual color of the needle can vary among different compass designs. The key is to understand the polarity of the needle, where the end pointing north indicates the magnetic north pole and the opposite end indicates the magnetic south pole.

In summary, the observations of a compass indicate that the red end points towards the Earth's magnetic north pole, representing a polarity of "north," while the white end points towards the Earth's magnetic south pole, representing a polarity of "south."

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11.3 g/cm³ equals to 1130  kg/m³.

The mass of a substance per unit of volume is its density. Density is most frequently represented by the symbol ρ, however Latin letter D may also be used. Density is calculated mathematically by dividing mass by volume.

Given that 11.3 g/cm³.

Know that

1000 grams = 1 kg

1 grams = 1/1000 kg.

100 cm = 1 m

1 cm = 1/100 m.

Therefore, 1 cm³ = (1/100)³ m³

= 1/1000000 m³

Hence, 1  g/cm³ = (1/1000) ÷ (1/1000000)  kg/m³

= 1000000/1000 kg/m³

= 1000 kg/m³.

Hence, 11.3 g/cm³ = (11.3 × 1000) kg/m³

= 1130  kg/m³

Hence, 11.3 g/cm³ equals to 1130  kg/m³.

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Answer:

14 x 98/12+13-8 = 119.33..

the .33.. is a repeating decimal

Answer:

The uniform circular motion has a constant speed only but not constant velocity . Because the velocity changes its direction at every point of its path.

Explanation:

just look it up :)

The approximate average bond enthalpy for the oxygen-to-oxygen bonds in ozone is 300 kJ/mol. The ozone is composed of three oxygen atoms, and it's highly reactive.

Ozone is a light blue-colored gas, that is highly soluble in an inert, non-polar solvent.

\(2O_3 \rightarrow 3O_2 \\\\ \Delta H = -300 KJ/mol\)

There are double bonds present in the ozone, two molecules of ozone mean there will be four bonds.

\(4 \times E -3 \times 500 = -300\\\\4 \times E = -300 + 1500\\\\E = \dfrac{1200}{4} \\\\E = 300 \;KJ/mol\)

Thus, the correct option C, 300 kJ/mol.

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Cardiovascular drug classes are Beta-blockers, Diuretics, Calcium channel blockers, and ACE inhibitors. The correct answer is options are A, B, D, and F.

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The correct question would be as

Which of the following are cardiovascular drug classes? Select all that apply.

A) Beta-blockers

B) Diuretics

C) Antibiotics

D) Calcium channel blockers

E) Antidepressants

F) ACE inhibitors

Answer:

232 N

Explanation:

By Hooke's law, the force applied to a spring is proportional to the stretch of the spring, so

F = kx

Where F is the force, k is the spring constant and x is how much it is stretched.

So, replacing k by 58N/cm and x by 4 cm, we get

F = (58 N/cm)(4 cm)

F = 232 N

Therefore, the force applied is 232 N

RS is a composition of rotation and reflection in the Euclidean plane E². The precise description of RS depends on the specific properties of the rotation R and reflection S.

In general, if R and S have the same axis or line of symmetry, the composition RS results in a translation. If R and S have intersecting lines of symmetry, RS yields a glide reflection. If R and S have perpendicular lines of symmetry, RS produces a rotation.

It is important to consider special cases, such as parallel lines of symmetry, coinciding axes, or perpendicular lines of reflection, as they may lead to different outcomes. The classification of isometries in E² involves understanding how rotations and reflections combine to create different transformations in the plane.

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Answer:

5,760

Explanation:

1 minute is equal to 60 seconds. so you will multiply 60 times 96. and that equals 5,760

Answer:

E(nergy) = 8 V * 6A * 300 sec = 14400 joules

14400 J / 4.19 J/cal = 3437 cal

Q = k m T = k 2000gm * 8 deg C = 16000 k gm-deg C

k = 3437 / 16000 = .215 cal / (gm-deg C)

Answer:

A key result is an important output that then becomes an input to the next key result area, or to the next person. For example, in selling, a key result area is prospecting—finding new, qualified, and interested prospects to talk to about your product or service.

hope this helps!

Explanation:

Answer:

1. rotation. 2. axis

Explanation:

The Earths rotation on its axis causes day and night

Answer:

everything is perished isn't it?

hope it helps.

Answer:

isn't it is the answer of your question

hope it is helpful to you

The velocity of the trolley system with the block in it is 1.33 m/s.

Weight of the block, W = 30 N

Mass of the block, m = W/g

m = 30/10 = 3 kg

Mass of the trolley, M = 6 kg

Initial velocity of the trolley, u = 2 m/s

According to law of conservation of momentum,

In an isolated system, when two objects collide, the combined momentum before and after the collision is constant. Due to the fact that the momentum gained by one object equals the momentum lost by another, this occurs.

So, the momentum of the trolley system before and after dropping the block to it are equal.

Mu = (M + m)v

Therefore, the velocity of the trolley system with the block in it,

v = Mu/(M + m)

v = 6 x 2/(6 + 3)

v = 12/9

v = 1.33 m/s

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To produce a Cu-Ni alloy with a minimum resistance (permissible stress-yield) of 25,000 psi and a tensile strength of 68,000 psi, while ensuring a minimum elongation of 22%, 100 kgs of the alloy will be required.

The required Cu-Ni alloy must meet specific mechanical properties. The minimum permissible stress-yield is set at 25,000 psi, which indicates the maximum stress the alloy can endure while maintaining a permanent deformation of less than 0.2%. This property ensures the alloy's stability under normal operating conditions.

Furthermore, the alloy needs to possess a tensile strength of at least 68,000 psi, which represents the maximum stress it can withstand before fracturing. This property ensures the alloy's structural integrity and prevents failure under high-stress situations.

Additionally, the alloy must exhibit a minimum elongation of 22%, which measures its ability to deform plastically without breaking. This property is crucial for applications where the alloy may experience bending or stretching forces.

To fulfill these requirements, a total of 100 kgs of the Cu-Ni alloy needs to be produced, ensuring that the specified mechanical properties are met throughout the entire batch.

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Answer:

it is chemical energy

Explanation:

that is the energy used by our body, so it is the one that we will loose. and the energy that we gain is also chemical energy

Answer:

2 314.28571 kg / m

Explanation:

divide

and you see

Answer:

The correct answer is calcium iodide.

Explanation:

Hope this helped Mark BRAINLIEST!!!

The compound with the chemical formula CaI₂ is called calcium iodide.

A compound is a substance formed when two or more elements chemically combine in specific proportions. It is characterized by a distinct chemical composition and properties that differ from the elements it is composed of. Compounds are held together by chemical bonds, which can be either ionic or covalent, depending on the nature of the elements involved.

Calcium Iodide (CaI₂):

Calcium iodide is an ionic compound composed of the elements calcium (Ca) and iodine (I). In this compound, calcium, which is a metal, donates two electrons to iodine, a non-metal, resulting in the formation of a calcium ion (Ca²⁺) and two iodide ions (I⁻). The ions are held together by electrostatic forces of attraction, forming a crystal lattice structure.

Calcium iodide is a white, crystalline solid that is highly soluble in water. It is commonly used in various applications, including as a catalyst in organic reactions, a source of iodine for nutritional supplements, and in the synthesis of pharmaceuticals.

Therefore, The correct answer is Calcium Iodide.

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